Manual - Gefen
Contents
1. SUBWOOFER RCA AUDIO CABLE SPEAKER CABLE RS 232 CABLE Audio Source Audio Source GefenTV 2 1 Audio Amplifier w Volume Stabilizer Subwoofer RS 232 Controller GTV VOLCONT DA ATTENTION This product should always be connected to a grounded electrical socket MENU SYSTEM Status Screen The Status Screen displays information regarding the current settings of the Volume Stabilizer The Status Screen is also used in conjunction with navigating the built in Menu System After powering on the Volume Stabilizer the Standby Screen will be displayed The Standby Screen indicates the currently selected A V input the current volume setting the audio input format and the audio processing mode Audio Input Audio Gain Displays the selected Displays the audio Audio input gain volume OPTICAL 6405 zH 00 OFF Audio Format Dolby Volume Displays the Displays the Bypass audio input format Mode status Standby Mode and Powering the Volume Stabilizer Once the power supply is connected and the AC power cord is connected to an available electrical outlet the Volume Stabilizer will be in Standby Mode When in Standby Mode the Status Screen is not displayed To power on the Volume Stabilizer press the Standby button on the front panel or use the Power button on the IR Remote Control Standby Mode No Status Screen Stabilizer ON Status Screen OPTICAL 4 FPEM Z CH2. eai tr lulus Dot EDU FREE 3 4 Ibs Certifications niii into UL power supply CE safety and EMC RoHS WEEE 53 WARRANTY Gefen warrants the equipment it manufactures to be free from defects in material and workmanship If equipment fails because of such defects and Gefen is notified within two 2 years from the date of shipment Gefen will at its option repair or replace the equipment provided that the equipment has not been subjected to mechanical electrical or other abuse or modifications Equipment that fails under conditions other than those covered will be repaired at the current price of parts and labor in effect at the time of repair Such repairs are warranted for ninety 90 days from the day of reshipment to the Buyer This warranty is in lieu of all other warranties expressed or implied including without limitation any implied warranty or merchantability or fitness for any particular purpose all of which are expressly disclaimed 1 Proof of sale may be required in order to claim warranty 2 Customers outside the US are responsible for shipping charges to and from Gefen 3 Copper cables are limited to a 30 day warranty and cables must be in their original condition The information in this manual has been carefully checked and is believed to be accurate However Gefen assumes no responsibility for any inaccuracies that may be contained in this manual In no event will Gefen be lia
3. Returns DI E FAULT DISPBRT Command The DISPBRT command sets the brightness for the front panel LCD Syntax DISPBRT paraml Parameters param1 Value Value Meaning Increase brightness level by 1 crease brightness level by 1 Returns DISPBRT paraml 29 RS 232 SERIAL COMMANDS DISTFL Command The DISTFL command sets the distance in feet for the Front Left speaker Syntax DISTFL paraml Parameters param1 Distance 0 33 Returns DISTFL paraml Notes The or character can also be used instead of specifying a value in order to increase or decrease the distance by 1 foot intervals Use for param7 to retrieve the current value When using for param7 do not include a space between the command and the parameter DISTFR Command The DISTFR command sets the distance in feet for the Front Right speaker Syntax DISTFR paraml Parameters param1 Distance 0 33 Returns DISTFR paraml Notes The or character can also be used instead of specifying a value in order to increase or decrease the distance by 1 foot intervals Use for param7 to retrieve the current value When using a for paramf do not include a space between the command and the parameter 30 RS 232 SERIAL COMMANDS DISTSB Command The DISTFB command sets the distance in feet for the Subwoofer Syntax DISTSB paraml Parameters param1 Distance 0 33 Retu
4. Syntax PWR paraml Parameters aram1 Range 12 12 p g Returns SUBV value Notes The or character can also be used instead of specifying a value in order to increase or decrease the Subwoofer level by 1 dB intervals Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter TREB Command The TREB command sets the treble level Syntax TREB paraml Parameters param1 Range 12 12 Returns TREB paraml Notes The or character can also be used instead of specifying a value in order to increase or decrease the treble level by 1 dB intervals Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 43 RS 232 SERIAL COMMANDS VOL Command The VOL command sets the master output gain Syntax VOL parami Parameters aram1 Range 12 12 p g Returns VOL value Notes The or character can also be used instead of specifying a value in order to increase or decrease the master output gain by 1 dB intervals Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 44 MENU SYSTEM SUMMARY Main Menu 160E FCM 2CH Menu x2 MATH SPEA
5. The following screen will be displayed SPEAKER DISTANCE FROMT Use the 4 gt buttons on the front panel to adjust the speaker distance for the Front Right channel 20 MENU SYSTEM Subwoofer 4 Press the button The following screen will be displayed SPEAKER DISTANCE SUE Use the 4 gt buttons the front panel to adjust the speaker distance for the Subwoofer Exiting the Speaker Distance Menu 5 Press the Y button The following screen will be displayed SPEAKER DISTANCE EXIT Press the Enter button on the front panel to return to the Speaker Distance Menu Adjusting Tone Control The Tone Control menu allows you to adjust the treble and bass settings Bass 1 Press the Menu button Use the or V buttons on the front panel to navigate to the Tone Control screen MATH CONTROL 21 2 MENU SYSTEM Press the Enter button Use the lt and gt buttons on the front panel to adjust the amount of bass low frequency boost applied to the output audio signal CHADE Treble Press the Y button The following screen will be displayed CONTROL TREBLE Use the 4 gt buttons the front panel to adjust the treble high frequency boost applied to the output audio signal Exiting the Tone Control Menu Press the V button The following screen will be
6. 00 OFF 13 MENU SYSTEM Selecting the Audio Input Use the Input Button to select between Coax S PDIF or Optical TOSLINK inputs Each time the Input Button is pressed the Audio Amplifier will cycle to the next input option The currently selected audio input will be displayed in the Status Screen OPTICAL 841 EE OF Audio Input Selection Button Current audio Input Selection Adjusting the Volume Use the Up Button and Down Button to increase or decrease the audio gain in the Status Screen Audio gain can be reduced to a minimum of 60 dB and to a maximum of 10 dB Each time these buttons are pressed the volume is increased or decreased by 1 dB TIP To increase or decrease the audio gain at a faster rate press 4 and hold the A or V buttons until the desired volume is achieved 6408 DO OFF Current Audio Increase Decrease Volume Volume Volume 14 MENU SYSTEM Bypass Mode Bypass mode is recommended when listening to music or watching movies which have a wide dynamic range When Bypass mode is enabled Dolby Volume processing is disabled Bypass mode can be enabled or disabled by using the Bypass button on the front panel Bypass mode can also be enabled or disabled through the Miscellaneous Menu see page 22 Menu Mute D D OPTICA 0408 w amp Input Bypass OFF UN e Bypass Mode Bypass Status Button When Bypass Mode is enabled Dolby Volume
7. 2 1 channel analog audio Dynamically boosts low and high frequency content Bypass Mode permits audio to pass through unchanged Audio amplifier 2 channels 25 W per channel Line level analog L R outputs plus subwoofer output RS 232 port for home automation control Rremote control and front panel controls Package Includes 1 GefenTV 2 1 Audio Amplifier w Volume Stabilizer 1 Analog Audio L R RCA cable 1 IR Remote Control Unit 1 24 V DC Power Adapter 1 User Manual FRONT PANEL LAYOUT Mw 60 E L Agpueas 4 DU Hid 3nduj WoT Li OL eo m 014 FRONT PANEL DESCRIPTIONS 1 Main LCD Display This display will show pertinent status information and will be used to make adjustments to features in the Menu System 2 Left Cursor Button This button is used to navigate the Menu System and change settings by moving the cursor to the left 3 Enter Button This button is used to accept and save a current setting in the Menu System 4 Up Button This button is used to navigate the Menu System and change settings by moving the cursor up This button is also used for increasing the audio volume in the Status Screen see page 13 5 Right Cursor Button This button is used to navigate the Menu System and change settings by moving the cursor to the right 6 Down Button This button is used to navigate the Menu System and chang
8. 36 for details on setting the IR channel for the Volume Stabilizer LCM Contrast Press the Y button The following screen will be displayed MISC SETUP COMTRAST Ba Use the lt and gt buttons on the front panel to adjust the contrast of the front panel LCD display Exiting the Tone Control Menu Press the V button The following screen will be displayed MISC SETUP EXIT Press the Enter button on the front panel to return to the Miscellaneous Setup Menu 25 RS 232 SERIAL CONTROL e 9876 Only Pins 2 RX 3 TX and 5 Ground are used on the RS 232 serial interface RS 232 Settings Bits per second Data bits Parity Stop bits Flow Control IMPORTANT When sending RS 232 commands a carriage return must be included at the end of the command A space must included between the command and the parameter NOTE The return value will be displayed when using a terminal based application indicating the current value after executing the command Commands are not case sensitive 26 RS 232 SERIAL COMMANDS Commands Command Description o 2CHMX 2 channel downmixing BASS Increases decreases the amount of bass DFLT Reset unit to factory default settings DISPBRT Display Brightness DISTFL Sets the distance for the Front Left speaker DISTFR Sets the distance for the Front Right speaker DISTSB Sets the distance for the Subwoofer DV Enables Disables Dol
9. Channel Connection the 2 1 Audio Amplifi er w Volume Stabilizer Wiring Diagram Operating the 2 1 Audio Amplifi er w Volume Stabilizer Status Screen Standby Mode and Powering the Volume Stabilizer Selecting the Audio Input Adjusting the Volume Bypass Mode Menu System Using the Menu System Setting the Speaker Size Setting the Speaker Level Adjusting the Speaker Distance Adjusting the Tone Control Miscellaneous Setup RS 232 Serial Control RS 232 Serial Commands Menu System Summary Layout Speaker Size Speaker Level Speaker Distance Tone Control Miscellaneous Setup Exit Specifications Warranty INTRODUCTION Congratulations on your purchase of the GefenTV 2 1 Audio Amplifier w Volume Stabilizer Your complete satisfaction is very important to us GefenTV GefenTV is a unique product line catering to the growing needs for innovative home theater solutions We specialize in total integration for your home theater while also focusing on going above and beyond customer expectations to ensure you get the most from your hardware We invite you to explore our distinct product line and hope you find your solutions The GefenTV 2 1 Audio Amplifier w Volume Stabilizer The GefenTV 2 1 Audio Amplifier w Volume Stabilizer is well suited for use in small home entertainment systems or as an add on audio processor to any computer audio output It offers three audio inputs TOSLINK S PDIF Analog L R for multiple audio sources
10. I DOLBY VOLUME DIGITAL 2 1 Audio Amplifier w Volume Stabilizer GTV VOLCONT DA User Manual gefentv com ASKING FOR ASSISTANCE Technical Support Telephone 818 772 9100 800 545 6900 Fax 818 772 9120 Technical Support Hours 8 00 AM to 5 00 PM Monday thru Friday PST Write To Gefen LLC c o Customer Service 20600 Nordhoff St Chatsworth CA 91311 www gefentv com support gefentv com Notice Gefen LLC reserves the right to make changes in the hardware packaging and any accompanying documentation without prior written notice For the latest firmware updates for this product please visit Gefen s download Web page at http www gefen com kvm support download jsp 2 1 Audio Amplifier w Volume Stabilizer is a trademark of Gefen LLC Manufactured under license from Dolby Laboratories Dolby and the double D symbol are trademarks of Dolby Laboratories 2011 Gefen LLC All rights reserved All trademarks are the property of their respective owners Rev 1 O Q Q N Gy Or OY O1 l2 N c c c SQ OQ O O Q O OI Z Q QO N N N O O CONTENTS Introduction Operation Notes Features Front Panel Layout Front Panel Descriptions Back Panel Layout Back Panel Descriptions IR Remote Control Layout and Descriptions Installing the Battery Setting the IR
11. RS 232 SERIAL COMMANDS RTV Command The RTV command sets the output gain of the Right Channel Syntax RTV paraml Parameters param1 Value Value Meaning Increase gain by 1 dB Decrease gain by 1 dB Returns RTV paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 40 RS 232 SERIAL COMMANDS STAT Command The STAT command enables or disables auto status feedback Syntax STAT paraml Parameters param1 Mode OFF ON Mode Meaning OFF Auto Status Off ON Auto Status On Returns STAT paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 41 RS 232 SERIAL COMMANDS SUB Command This command performs two functions 1 Enabling or disabling the Subwoofer 2 Specifies the Subwoofer crossover frequency Syntax SUB paraml Parameters param1 Mode 10 1 Mode Meaning OFF Subwoofer Off ON Subwoofer On 50 Crossover freq 50 Hz 60 Crossover freq 60 Hz 90 Crossover freq 90 Hz Returns SUB paraml Notes Use for param7 to retrieve the current value When using a for paramf do not include a space between the command and the parameter 42 RS 232 SERIAL COMMANDS SUBV Command The SUBV command sets the volume level of the Subwoofer
12. Terminals These speaker binding post terminals will accept spade lug banana plug dual banana plug bare wire and pin style connectors 24 V DC Power Receptacle Connect the included 24 V DC power supply to this receptacle IR REMOTE CONTROL LAYOUT j POWER POWER OFF ON DOLBY VOLUME ON a ENTER d 0 gt 0 OPTICAL L R MUTE ON Gefen Activity Indicator This LED will be activated momentarily each time a button is pressed Power Off Turns off the unit Power On Switches to the optical TOSLINK audio input Bypass On Disables Dolby Volume control Bypass Off Enables Dolby Volume control Exit Button Exits a menu or sub menu within the built in menu system Menu 16 15 14 Places the unit in Menu Mode allowing access to all menu systems 8 10 11 12 13 14 15 16 17 IR REMOTE CONTROL LAYOUT Optical Switches to the optical TOSLINK audio input Coax Switches to the coax S PDIF audio input L R Switches to the analog L R RCA audio input Mute Off Disables the volume muting Mute On Enables the volume muting Left Cursor Used to navigate right within the menu system Down Cursor Used to navigate down within the menu system This button is also used to decrease the volume Right Cursor Used to navigate right within the menu system Up Cursor Used to navigate up within the menu system This button is also used to
13. The product also incorporates a Dolby Digital decoder decoder to downmix 5 1 to 2 1 channels of audio Dolby Volume Technology automatically outputs consistent audio levels regardless of the program type commercials movies or TV shows The GefenTV 2 1 Audio Amplifier w Volume Stabilizer provides amplification of up to 25 Watts per channel Left and Right fed through the unit s speaker output binding posts plus line level output for a powered subwoofer This product switches to standby mode when not in use An RS 232 port is provided for home automation control For easy access and control use the front panel control buttons with an illuminated LCD display or the included IR remote control from several feet away How It Works Connect the audio input source s to the GefenTV 2 1 Audio Amplifier w Vol ume Stabilizer Connect the speakers using speaker wires not included to the Speaker Output binding posts Connect the included RS 232 cable from the RS 232 port to your home automation control device optional Plug in the in cluded power supply to the 24V DC power jack on the rear panel of the unit and to a power outlet Use the front panel buttons or the included IR remote to control the front panel display menu functions Mute Input Select Bypass and Standby mode OPERATION NOTES READ THESE NOTES BEFORE INSTALLING OR OPERATING THE GEFENTV2 1 AUDIO AMPLIFIER W VOLUME STABILIZER GefenTV 2 1 Audio Amplifier w Volume Sta
14. at a faster 18 3 4 5 MENU SYSTEM Front Right Press the V button The following screen will be displayed SPEAKER LEVEL FROHT R crBaBnbs Use the lt and gt buttons on the front panel to adjust the speaker gain Subwoofer Press the Y button on the front panel The following screen will be displayed SPEAKER LEVEL SUE Use the 4 gt buttons on the front panel to adjust the speaker gain Exiting the Speaker Level Menu Press the Y button The following screen will be displayed SPEAKER LEVEL EXIT Press the Enter button on the front panel to return to the Speaker Level Menu 19 MENU SYSTEM Adjusting the Speaker Distance Adjusting the speaker adds delay in the audio signal which allows the speaker to sound as if it is a certain distance away even when there is no space to physically position it father away from the listener A 1ms delay is equivalent to moving the speaker away from the listener by 1 foot Speaker Maximum Value Default Setting Front 33 f Front R 33 ft 33 ft Front Left 1 Press the Menu button Use the or V buttons on the front panel to navigate to the Speaker Distance screen MAIN MEHU SPEAKER DISTANCE 2 Press the Enter button Use the lt and gt buttons on the front panel to adjust the speaker distance for the Front Left channel SPEAKER DISTANCE FROMT L Front Right 3 Press the Y button
15. increase the volume Enter Used to confirm save a changes within the built in menu system 3 The Remote Control unit ships with two batteries One battery is required for INSTALLING THE IR REMOTE CONTROL Installing the Battery Remove the battery cover on the back of the IR Remote Control Unit Insert the included battery into the open battery slot The positive side of the battery should be facing up Replace the battery cover operation and the other battery is a spare Gefen P N GTV VOLC DAIR www gefentv com Battery Slot shown with battery WARNING Risk of explosion if battery is replaced by an incorrect type Dispose of used batteries according to the instructions 10 IR REMOTE CONTROL CONFIGURATION Setting the IR Channel on the IR Remote Control In the event that IR commands from other remote controls interfere with the supplied IR Remote Control unit changing the IR Remote Control s IR channel will fix the problem The IR Remote Control unit has a bank of DIP switches used for setting the IR channel The DIP switch bank is located underneath the battery cover P N GTV VOLC DAIR www gefentv com Left Picture of the opened rear battery compartment of the IR remote showing the exposed DIP Switch bank between the battery chambers Corresponding DIP Switch Settings for each IR Channel IR Channel 0 1 IR a 2 IR aoe 3 It is important that the IR chan
16. retrieve the current value When using a for param7 do not include a space between the command and the parameter 36 RS 232 SERIAL COMMANDS LFV Command The LFV command sets the output gain of the Left Channel Syntax LFV paraml Parameters param1 Value Value Meaning Increase gain by 1 dB Decrease gain by 1 dB Returns LFV paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 37 RS 232 SERIAL COMMANDS MUTE Command The MUTE command sets the audio mode Syntax MUTE paraml Parameters param1 Mode 0 3 Mode Meaning OFF Disable mute ON Enable mute TOGGLE Mute toggle Returns MUTE paraml Notes Use for param7 to retrieve the current value When using for param7 do not include a space between the command and the parameter 38 RS 232 SERIAL COMMANDS POWER Command The POWER command turns the unit ON or OFF Syntax POWER paraml Parameters param1 Mode OFF ON TOGGLE Mode Meaning OFF Power save mode ON Power On TOGGLE Toggle power state Returns POWER paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter RST Command The RST command resets the unit Syntax RST Parameters None 39
17. KER SIZE A Menu MATH SPEAKER LEVEL A 7 Y MATH SPEAKER DISTAHCE CONTROL SETUF MENU SYSTEM SUMMARY Speaker Size 4 MATH SPEAKER SIZE Menu Enter sone O O SIZE FROHTL R 5 409 gt Lage SPEAKER SIZE SUE COMSUEB A SPEAKER SIZE SUE FREQ SPEAKER LEVEL ERIT 46 MENU SYSTEM SUMMARY Speaker Level MATH SPEAKER LEVEL Enter NOMEN O eis did M eU sFEREKER LEVEL FROHT L CraBanb A M Min 10 db SPEAKER LEVEL BBTLIB Vin 10 db Oa SPEAKER LEVEL SUE HADES gt Min 10 db Max 10 db SPEAKER LEVEL agere EXIT MENU SYSTEM SUMMARY Speaker Distance MATH SPEAKER DISTANCE Enter O O 4 DISTANCE FROHT L gt ree gt 0 SPEAKER DISTANCE FRONT CSFT CT Min O ft Max 33 ft SPEAKER DISTANCE ZJE COFT 3 2 Min O ft Max 33 ft SPEAKER DISTANCE EXIT MENU SYSTEM SUMMARY Tone Control MATH CONTROL Enter O O n nsn eee e Yel TONE gt FASS CADE TOHE CONTROL T
18. REBLE 49 MENU SYSTEM SUMMARY Miscellaneous Setup MATH MISC SETUP Menu Enter ooccceeco eoUmHISC SETUP COFF gt MISC SETUP ZCHDBOMHHMIX MISC SETUP LL CHIGH MENU SYSTEM SUMMARY MISC SETUP MISC SETUP IR CHAHHEL MISC SETIF LEM COMTRAST MENU SYSTEM SUMMARY 52 SPECIFICATIONS Speaker Output uu bete eas 25 W per channel RMS unn uska gt 90 dB lt 0 001 at 0 dBFS or 2 V rms Analog In Frequency Response cnet enne 20 Hz 20 kHz x 0 5 dB Analog Audio Input u u u iiir tie rte accen 1 L R 2 RCA jacks Digital A dio Irip ts 2 u iiem tee 1 TOSLINK 1 S PDIF Analog Audio 8 1 L R LFE 3 RCA jacks Speaker Connectors Kern th d nbn L R Binding Posts RS 232 Sertal POoFL sonic ce i ce vere Ava EE DB 9 female Front panel buttons Up Down Left Right Enter Menu Mute Input Bypass Standby 24 V DC Operating Temperatute ni eterne 0 40 C DIMENSIONS e hci oe ets 9 W x 2 4 H x 6 75 D Shipping
19. bilizer will use psycho acoustic technology to adjust volume automatically It is best used for TV programming where the level of sound rises and falls to an unacceptable level The device can be placed in Bypass Mode in situations where a wide dynamic range is appropriate such as movies and classical symphony concerts Bypass Mode disables the Dolby Volume Stabilizer The remote can be used to control the GefenTV 2 1 Audio Amplifier w Volume Stabilizer from a comfortable distance This unit supports the following conversions Analog to Analog two channel stereo to two channel stereo Digital to Analog optical coaxial to two channel stereo FEATURES Dolby Volume features Volume Leveler Enables consistent volume levels at all times between TV channels and between program materials Volume Modeler Delivers the perception of a full range audio experience at any volume level Audio settings can be customized to suit your personal preferences and listening conditions Improves multichannel surround even at low volumes Produces clear audio with no unwanted noise Features Dolby Volume and Dolby Digital Certified Adjustable Dolby Volume Level Prevents fluctuations in audio volume using Dolby Volume technology Accepts 2 channel analog audio and outputs 2 1 channel audio Accepts TOSLINK optical and S PDIF coax digital audio inputs e Accepts Dolby Digital 5 1 and converts it to
20. ble for direct indirect special incidental or consequential damages resulting from any defect or omission in this manual even if advised of the possibility of such damages The technical information contained herein regarding the features and specifications is subject to change without notice For the latest warranty coverage information refer to the Warranty and Return Policy under the Support section of the Gefen Web site at www gefen com PRODUCT REGISTRATION Please register your product online by visiting the Register Product page under the Support section of the Gefen Web site 54 Rev 1 ONT DAx xMA GTV VOLC 20600 Nordhoff St Chatsworth CA 91311 1 800 545 6900 818 772 9100 fax 818 772 9120 www gefentv com support gefentv com O amp E cc This product uses UL listed power supplies
21. by Volume DVL Sets the Dolby Volume Level FLR Sets the size of the Front Left Front Right speakers HELP Lists these RS 232 commands INFO Returns hardware and firmware version INPUT Selects the audio input INTYPE Returns the input audio format R Sets the IR channel LFV Sets the Left Channel level MUTE Enables disables toggles audio muting POWER Enables disables toggles Power RST Resets the unit RTV Sets the Right Channel level Enables disables Auto Status Enables disables sets the Subwoofer crossover freq Adjusts the subwoofer volume Increases decreases the treble Increases decreases the overall output volume 27 RS 232 SERIAL COMMANDS 2CHMX Command The 2CHMX command Syntax 2CHMX paraml Parameters param1 Value LoRo Downmix LoRo LtRt Downmix Lt Rt Notes Use for param7 to retrieve the current value BASS Command The BASS command sets the bass level Syntax BASS paraml Parameters param1 Level 12 12 Returns BASS value 12 12 Bass level Notes The or character can also be used instead of specifying a value in order to increase or decrease the bass level by 1 dB Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 28 RS 232 SERIAL COMMANDS DFLT Command The DFLT command sets the unit to the default settings Syntax DFLT Parameters None
22. disabled press the Bypass button to disable Bypass Mode Dolby Volume enabled To enable Bypass Mode again press the Bypass button once The current state of Bypass Mode is displayed in the Status Screen 15 MENU SYSTEM Using the Menu System The 2 1 Audio Amplifier w Volume Stabilizer comes with a built in menu system which provides control over additional audio features The following examples demonstrate some of the more common features of the Volume Stabilizer Setting the Speaker Size Adjusting the speaker size determines how each speaker handles low frequency bands The subwoofer has an option to disable the use of that channel If the subwoofer is not going to be used this channel should be set to None Front Left Front Right 1 Press the Menu button The front panel display will change to display the Speaker Size menu MATH SPEAKER SIZE 2 Press the Enter button Use the lt and gt button on the front panel to select between Small or Large for the Front Left and Front Right speaker size The default setting is Small SPEAKER SIZE FROHT Lee cSMALL 3 Subwoofer 3 Press the Y button The following screen will be displayed SPEAKER SIZE SUE 5 Use the 4 or gt buttons to enable or disable the Subwoofer output If a Subwoofer is present set the Subwoofer speaker size to OnSub The de fault setting is None 16 MENU SYSTEM Subwoofer Crossover Frequenc
23. displayed TOME CONTROL EXIT Press the Enter button on the front panel to return to the Tone Control Menu 4 Pressing the Menu button twice from any sub menu option will return you to the Standby Screen 22 MENU SYSTEM Miscellaneous Setup The Miscellaneous Setup Menu Misc Setup provides controls for enabling or disabling Dolby Volume adjusting the Dolby Volume threshold down mixing line out mode IR channel and front panel display contrast settings Miscellaneous Setup Menu 2CH Downmix Dolby Volume Level Line Out Mode IR Channel 3 Bypass Bypass mode is recommended when listening to music or watching movies which have a wide dynamic range When Bypass mode is enabled Dolby Volume processing is disabled 1 Press the Menu button on the front panel Press A or Y button on the front panel to navigate to the Miscellaneous Setup screen MAIN MENU MISC SETUP 2 Press the Enter button Use the lt and gt buttons on the front panel to enable ON or disable OFF Bypass Mode MISC SETUP OFF gt TIP Bypass Mode can also be enabled or disabled by using the Bypass button located on the front panel see page 4 23 MENU SYSTEM 2 Channel Downmix Press the Y button on the front panel to display the 2 Channel Downmix Screen MISC SETUP zCHDBOMHHMISX Use the lt and gt buttons on the front panel to between Lo Ro and Lt Rt If the downmix
24. e settings by moving the cursor down This button is also used for decreasing the audio volume in the Status Screen see page 13 7 Input Button Selects between analog L R S PDIF or TOSLINK audio input 8 Menu Button This button will activate the Menu System which allows changes to audio output 9 Bypass Button Press the Bypass button to disable Dolby Volume processing 10 Mute Button This button will cycle between Mute On and Mute Off modes When the Mute On mode is enabled all audio output is disabled 11 Standby Button Press the Standby button to place the unit in Standby Mode Standby Mode is an energy saving state where less than 1W of power is consumed when the product is not in use Back Panel BACK PANEL LAYOUT BACK PANEL DESCRIPTIONS RS 232 Serial Port This port is used for serial communication using an RS 232 control device Access to certain features are only available through the RS 232 interface Analog L R RCA Input Connect an RCA L R stereo pair from the source to these two ports Optical TOSLINK Input Connect an Optical cable from the source to this port Coax S PDIF Input Connect a Coax cable from the source to this port Analog L R RCA Output Connect a L R RCA stereo pair from this output to a L R RCA stereo input pair on the A V equipment LFE Subwoofer Output Connect a subwoofer to this output using a single RCA cable Front Left Front Right Speaker
25. ieve the current value When using a for param7 do not include a space between the command and the parameter HELP Command The HELP command lists the RS 232 command set Syntax HELP Parameters Notes The character must follow the command without a space 33 RS 232 SERIAL COMMANDS INFO Command The INFO command returns hardware and firmware version Syntax INFO Parameters Notes The character must follow the command without a space INPUT Command The INPUT command selects the audio input Syntax INPUT paraml Parameters param1 Value LR COAX OPT Value Meaning LR Analog L R input COAX S PDIF input OPT TOSLINK input Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 34 RS 232 SERIAL COMMANDS INTYPE Command The INTYPE query command returns the audio input format Syntax INTYPE Parameters None Returns Value Value Value Meaning PCM 2Ch PCM Stereo Dolby Digital 2 1 Dolby Digital 5 1 Notes None 35 RS 232 SERIAL COMMANDS IR Command The IR command sets the IR channel Syntax IR paraml Parameters param1 Channel 1 4 Input Meaning 1 IR Channel 1 2 IR Channel 2 3 IR Channel 3 4 IR Channel 4 Returns IR paraml Notes Use for param7 to
26. is set to Lo Ro then only the Left and Right channels will be mixed down to 2 channel stereo If the downmix is set to Lt Rt then the Left Right and all Surround channels will be mixed down to 2 channel stereo Dolby Volume Level Press the Y button The following screen will be displayed MISC SETUP nov LL CLO Use the 4 and gt buttons on the front panel to select between Low Med and High settings Low Minimal volume control between softer and louder audio passages Med Medium volume control between softer and louder audio passages High Highest contrast between softer and louder audio passages Line Out Mode Press the Y button on the front panel to display the Line Out Mode screen MISC SETUP LIHEOLTMO TDE FIM Use the 4 and gt buttons on the front panel to select between FIX and modes 24 MENU SYSTEM FIX Set the Line Out Mode to FIX if the volume will be controlled by an external amplifier AMP Set the Line Out Mode to AMP if the volume will be controlled by the GefenTV 2 1 Audio Amplifier w Volume Stabilizer IR Channel From the Line Out Mode screen press the Y button on the front panel to display the IR Channel screen MISC SETUP IR CHAHHEL Use the 4 gt buttons on the front panel to select the IR channel IMPORTANT The IR channel setting on the Volume Stabilizer must 4 be set to the same IR channel used by the Remote Control Unit See page
27. nel on the Remote Control unit matches the IR channel set on the 2 1 Audio Amplifier w Volume Stabilizer For example if both DIP switches on the IR Remote Control unit are set to IR channel 0 both DIP switches down then the 2 1 Audio Amplifier w Volume Stabilizer must also be set to IR channel 0 See page 35 on how to change the IR channel on the 2 1 Audio Amplifier w Volume Stabilizer 11 CONNECTING THE 2 1 AUDIO AMPLIFER W VOLUME STABILIZER How to Connect the 2 1 Audio Amplifier w Volume Stabilizer Connect the audio source to the GefenTV 2 1 Audio Amplifier w Volume Stabilizer using the Optical Coax and or L R analog audio cables Connect another set of L R analog audio cables from the Audio Output section of the GefenTV 2 1 Audio Amplifier w Volume Stabilizer to the inputs of the A V equipment Connect the subwoofer to the 2 1 Audio Amplifier w Volume Stabilizer using a single RCA cable Connect up to two speakers to the speaker terminals of the 2 1 Audio Amplifier w Volume Stabilizer The following connections are available Front Left Front Right Connect the included 24V DC power supply to the power receptacle on the Volume Stabilizer and connect the AC adapter to an available electrical outlet Wiring Diagram for the 2 1 Audio Amplifier wl Volume Stabilizer DIGITAL TOSLINK AUDI0 CABLE Gefen av DIGITAL COAX AUDIO CABLE ANALOG RCA AUDIO CABLE EEE a
28. rns DISTSB paraml Notes The or character can also be used instead of specifying a value in order to increase or decrease the distance by 1 foot intervals Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter DV Command The DV command enables or disables the Dolby amp Volume control Syntax DV paraml Parameters param1 Value ON OFF Value Meaning ON Dolby Volume On Bypass Off OFF Dolby Volume Off Bypass On Returns DV paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 31 RS 232 SERIAL COMMANDS DVL Command The DVL command sets the Dolby Volume level Syntax DVL paraml Parameters param1 Value LOW MED HIGH Value Meaning LOW Dolby Volume Low MED Dolby Volume Med HIGH Dolby Volume High Returns DVL paraml Notes Use for param7 to retrieve the current value When using a for param7 do not include a space between the command and the parameter 32 RS 232 SERIAL COMMANDS FLR Command The FLR command sets the size for the Front Left Front Right speakers Syntax FLR paraml Parameters param1 Size 0 1 Value Meaning SML Small Front Speakers LRG Large Front Speakers Returns FLR paraml Notes Use for param7 to retr
29. y If the speaker size for Sub is set to OnSub then the subwoofer crossover frequency can be adjusted Crossover Frequency 4 Press the Y button The following screen will be displayed SPEAKER SIZE SUE FRED c58Hz5 Use the 4 gt buttons to adjust the crossover frequency Exiting the Speaker Size Menu 5 Press the Y button The following screen will be displayed Press the Enter button on the front panel to return to the Speaker Size Menu 17 MENU SYSTEM Setting the Speaker Level Modifying the Speaker Level increases or decreases the audio output gain of a specific speaker This feature is useful for equalizing the sound at the listening position By default each speaker s output is set to 0 dB The output can be adjusted by 1 dB increments between 10 dB and 10 dB Front L 10 dB 10 dB 1 Front R 10 dB 10 dB Sub 10 dB 10 dB Front Left Press the Menu button Use the A or V buttons on the front panel to navigate to the Speaker Level screen MATH SPEAKER LEVEL Press the Enter button Use the lt and gt buttons on the front panel to adjust the speaker gain SPEAKER LEVEL FREOHT L The lt button is used to decrease the gain and the gt button is used to increase the gain Each press of these buttons will increase or decrease the level of the gain by 1 decibel intervals rate 4 TIP Press and hold the lt or P buttons to change values
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