Niles Audio TVA50 Stereo Amplifier User Manual
Contents
1. speakers Label the wires for future reference Adjusting Current Sensitivity The current sensing capability of the 50 is adjustable via a recessed screw located on the bottom of the unit Figure 6 This allows for the adjustment of the current sensing outlet based on the amount of current draw from the local source component 1 Plug the power cord of the local source component i e TV into the current sensing outlet of the 50 2 Turn the local source component on STEREO AMPLIFIER AUTOMATED 3 Gradually turn the sensitivity adjustment screw located on the bottom of the 50 Figure 6 until you hear the inter nal relay of 50 switch This is indicated by a clicking sound inside the unit The Power Active LED on the front panel of the 50 Figure 7 provides a visual indication of the local switching When the 50 switches to the local input the Power Active LED will change from red to green 4 Cycle the power of the local source component on and off Adjust the sensitivity setting of the 50 until the internal relay switches reliably NOTE The 50 may be set to operate continuously by turning the sensitivity screw fully counterclockwise This will bypass the internal sensing mechanism POWER ACTIVE Figure 7 50 Power Active LED SWITCHER S T ERE O AMPLIFIER AUTOMATED SWITCHER Installation Caution Turn the power OFF to2. TECH TIP Wire size is expressed by i s AWG American Wire Gauge number The lower the AWG number the larger the wire i e 20 AWG wire is physically larger than 22 AWG INSTALLATION CONSIDERATIONS Location The 50 should be installed near the device to be switched ideally within 15 feet to avoid signal loss and degradation over long runs of wire Access to the speaker wires from the whole house system and to the local speakers is also necessary Installation on a cabinet shelf sidewall or back panel are all acceptable Type of Speaker Wire We recommend 16 gauge stranded copper speaker wire for most connections and 14 gauge wire for runs longer than 80 Don t use wire larger than 14 gauge because larger wire may not fit into the connectors Type of Audio Cable Shielded stereo audio cables with quality gold plated connec tors are recommended Use low capacitance cables for runs that exceed 15 to minimize signal loss Wire runs greater than 50 are recommended only with cable that has been specifical ly designed for such applications Contact your cable manufac turer for a specific cable recommendation when wire runs exceed 50 Power Requirement Power the 50 with an unswitched AC 120V 60Hz outlet There is no power ON OFF switch The unit will automatically activate when a switching condition current sense or 12V Trigger IN is detected STEREO AMPLIFIER AUTOMATED Speakers The TVA
3. 12 13 14 15 STEREO AMPLIFIER AUTOMATED Only use attachments accessories specified by the manu facture Unplug this apparatus during lightning storm or when unused for long periods of time Refer all servicing to gualified service personnel Servicing is reguired when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped WARNING To reduce the risk of fire or electric shock this apparatus should not be exposed to rain or moisture and objects filled with liquids such as vases should not be placed on this apparatus To completely disconnect this equipment from the main disconnect the power supply cord plug from the receptacle The lightning flash with arrowhead symbol within CAUTION an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage CAUTION TO REDUCE within the product s enclosure that may be of THE RISK OF ELECTRICAL sufficient magnitude to constitute a risk of electric SHOCK DO NOT REMOVE COVER NO USER SERVICE The exclamation point within an equivalent ABLE PARTS INSIDE REFER triangle is intended to alert the user to the SERVICING TO QUALIFIED presence of important operating and maintenance SERVICE PERSONNEL servicing instructions in the literatu
4. 50 incorporates digital amplifier technology to deliver high output from a small footprint Current Sense The current sensing circuit provides reliable switching between the whole house and the local source Trigger In The presence of 3 30VAC DC at the TRIGGER IN terminal switches the 50 to the local source 12VDC Trigger Out Any time the 50 is switched to local source a 12VDC 200mA trigger voltage is emitted and can be used to control other devices Volume Control Adjusts the TVA50 amplifier output level Multiple Speaker Pairs The 50 allows automated switch ing of either one or two pairs of speakers 4 ohm Capability The 50 is designed to remain stable with a 4 ohm load DC Short Circuit and Overload Protection An automatic protection circuit safeguards 50 2 Year Warranty Two year parts and labor warranty SWITCHER STEREO AMPLIFIER AUTOMATED SWITCHER 50 PARTS GUIDE 1 2 AC IN Removable three prong IEC compatible power cord Current Sensing AC Outlet 50 will activate and switch inputs when it senses a current draw from a connected device Voltage Trigger IN 3 5mm mini phone jack 50 will acti vate and switch inputs when 3 30 volts AC or DC is present 12V Trigger OUT 3 5mm mini phone jack 12VDC 200mA control output for automated control of lifts screens drapes etc Audio Line IN Gold plated RCA t
5. AUTOMATED Integrating a Niles IR repeater system with a TV plugged into the current sensed outlet of a TVA50 a 12VDC controlled lift mechanism provides an inexpensive yet elegant solution to system automation Figure 5 When the system is in whole house mode music from the main system plays through the in wall speakers in a room The TV is hidden away in the lift cabinet With a Niles MS100 Microsensor M inconspicuously mounted in the lift cabinet and properly configured for control of the TV hidden inside the TV power ON command from an IR remote control will turn the TV on The 50 current sensing outlet will detect the change current draw switch the local room speakers to TV and send a 12VDC Trigger OUT to the lift and automatically raise the TV out of the cabinet all from just the ON command for the TV Turn the TV OFF the 50 current sensed outlet detects the change switches the speakers back to the whole house system and cuts the 12VDC Trigger OUT causing the lift to lower the TV back into the cabinet SWITCHER STEREO AOSOBOLopE PER TROUBLESHOOTING 50 will not power up Is TVA50 plugged in to an unswitched outlet Is the POWER ACTIVE LED Red 120VAC measured from outlet with voltmeter Try another unswitched outlet 50 will not activate Current Sense Mode Is the TV plugged in to the sensed out let on the TVA50 Is the TV turned ON 50 will not activate 12V Tri
6. Control With a Fixed Output Device In some applications it may be desirable to control speaker level of both the whole house sources and the TV or perhaps a local CD or DVD player that might not have a variable output with the in wall volume control In this application the vol ume control would be connected to the output SPEAKER OUT of the 50 and the fixed line level output of the TV or local device would be used NOTE f driving speakers and using volume controls on both SPEAKER OUT A and B minimum acceptable impedance is 4 ohms Be sure to check speaker specifications and impedance magnifying settings on the volume controls to assure proper per formance Exceeding this load will cause the 50 to go into pro tection and shut down 12V Trigger Out The 50 has a 12VDC 200mA Trigger OUT that will be acti vated in the current sense mode or when 3 30V AC DC is detected on the Trigger IN terminal This Trigger OUT voltage can be used to control 12VDC controlled devices such as drapes screens and TV lifts 12V Trigger Out and a TV lift In certain exotic applications it is desirable to keep all compo nents hidden from sight when not in use A TV mounted in a lift cabinet is a perfect example When not in use the TV is hidden away in an attractive furniture quality cabinet A motorized lift mechanism will raise the TV up out of the cabi net for use when activated by voltage IR or RF commands STEREO AMPLIFIER
7. INSTALLATION amp OPERATION GUIDE I1 VA50 STEREO AMPLIFIER AUTOMATED SWITCHER R NILES BLENDING HIGH FIDELITY AND ARCHITECTURE ST RE O TVA50 STEREO AMPLIFIER AUTOMATED SWITCHER TABLE OF CONTENTS Introduction Features and Benefits 50 Parts Guide Installation Considerations 11 Installation 13 Trouble Shooting 23 Specifications 24 24 Contents AMPLIFIER AUTOMATED SWITCHER IMPORTANT SAFETY INSTRUCTIONS D ON a oe uro NES 10 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accor dance with the manufacture s instructions Do not install near any heat source such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provid ed plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11
8. SO will remain stable when driving a 4 ohm load If only one pair of speakers is being driven 4 6 or 8 ohm speakers systems can be used If switching two pairs 8 ohm speakers must be used Fixed Variable Line Level Outputs To control the TV volume through the speakers the variable output on the TV must be connected to the TVA5O Line IN Using Volume Controls Depending on your installation in wall volume controls may be used to control the speaker level Connect the in wall volume control to the 50 speaker output This requires use of the fixed output on the TV In this application volume for all sources is controlled with the in wall volume control SWITCHER STEREO AMPLIFIER AUTOMATED SWITCHER INSTALLATION Preparing for Installation 1 Figure 3 shows a typical application for switching one pair of speakers to a local source using current sensing Refer to the other system applications for switching multiple speak er pairs and use of the Trigger IN OUT If your application is different from those diagrams use appropriate system design software or draw it out on paper Make note of all parts and components needed for installation 50 speakers wire etc Once the system has been designed test the system design prior to installation to assure performance and eliminate time wasted running around shopping for parts not speci fied or missing Run all necessary wiring to the 50 local source and
9. able con nector plug 4 Insert each wire into the appropriate hole on the remov able connector plug and snap the locking tab down NOTE 1 f switching two speaker pairs Figure 4 repeat steps 1 4 above for SPEAKER B IN NOTE 2 Maintain proper polarity Connect the positive terminals on the 50 to the positive terminals on the whole house ampli fier Connect the negative terminals the 50 to the negative terminals on the whole house amplifier To help you avoid improp er phasing the connector plug is keyed Insert the smooth side of the connector plug into the smooth side of the socket Don t force the scalloped side of the connector plug into the smooth side of the socket Connect Speakers 1 Locate the 4 pin speaker connector plug for SPEAKER A OUT and remove if plugged in 2 Strip 1 4 of insulation from the end of each wire for SPEAKER A OUT that will connect to the local room speakers Tightly twist the end of each wire until no frayed ends remain SWITCHER STEREO AMPLIFIER AUTOMATED SWITCHER 3 Use a small flathead screwdriver or your thumbnail to raise the locking tabs exposing the holes on the removable con nector plug 4 Insert each wire into the appropriate hole on the remov able connector plug and snap the locking tab down NOTE 1 f switching two speaker pairs repeat steps 1 4 above for SPEAKER B OUT When switching two pairs 8 ohm speakers must be used Connect Local Sou
10. all components in the system to prevent accidental shorting or electrical shock Mounting the TVA50 When possible the TVA50 should be installed near the device to be switched An unswitched 120VAC outlet is required to power the TVA50 Unit should remain unplugged during installation Care should be taken to provide adequate space for access and connections Horizontal Shelf Mount Install the supplied self adhesive rubber feet to the bottom of the TVA50 The unit can be placed on top of a shelf in a wall unit or equipment cabinet Nothing should be placed on top of the unit Vertical Wall Mounting The unit can also be attached to the side wall or back panel of a wall unit or equipment cabinet using the keyholes on the back of the TVA50 1 Using a level and tape measure install four drywall screws according to the measurements shown in Figure 6 2 Align the keyholes on the back of the TVA50 with the mounting screws and slide the unit down until it locks STEREO AMPLITIER AUTOMATED Connect Whole House System 1 Locate the 4 pin speaker connector plug for SPEAKER A IN and remove if plugged in 2 Strip 1 4 of insulation from the end of each wire for SPEAKER A IN coming from the speaker level output of the whole house system amplifier Tightly twist the end of each wire until no frayed ends remain 3 Use a small flathead screwdriver or your thumbnail to raise the locking tabs exposing the holes on the remov
11. eaker A Out 90000 17m7 9 eo a 90909 77 a CI Speaker A Whole House Receiver Figure 3 TV current sense with one speaker pair STEREO AMPLIFIER AUTOMATED SWITCHER To Current Sensing Outlet TV Power Cord To Unswitched Outlet Right Left TV Variable Line Out TV Local Room Speaker A Out Right To Speaker A Input 90000 oe 90999 77 o own OS Speaker A Whole House Receiver To Speaker B Input Figure 4 TV current sense with two pair of 8 ohm speakers STEREO AMPLIFIER AUTOMATED SWITCHER TV Power Cord To Current Sensing Outlet 12VDC Trigger Outlet out to TV lift Niles IR Flasher TV Variable Line Out Speaker A Out To Speaker A Input To Unswitched Left ee e e 99999 1177 Bo oO 0 IR Remote Figure 5 TV current sense with one speaker pair and a TV lift Speaker A Whole House Receiver SWITCHER STEREO AMPLIFIER AUTOMATED CURRENT SENSITIVITY ADJUSTMENT URRENT SENSITIVITY ADJUSTMENT MIN MAX 4 15 16 Figure 6 Bottom of the unit with measurements for wall mounting STEREO AMPLIFIER AUTOMATED SWITCHER
12. gger Mode Is the voltage on the TRIGGER IN ter minal 3 30 VAC DC Is polarity of 3 5mm miniplug correct tip 12VDC sleeve ground DC only Polarity non critical for AC voltage trigger No audio output A pair B pair whole house nonswitched mode Is the POWER ACTIVE LED Red AUTOMATED SWITCHER Are the speakers connected to the 50 Are the 4 speaker connector plugs IN OUT A B properly seated Is the speaker wire properly stripped Are the lock tabs snapped down Is the whole house audio source ON and playing Is the volume up on the whole house system If using an in wall volume control is it turned up No audio output A pair B pair local switched mode Is the POWER ACTIVE LED on the 50 Green Is the TV source line out connected to the LINE IN on the TVA50 Is the volume up on the TV Is the volume control on the 50 properly adjusted Audio level in local switched mode too high low See Volume Control section page 15 STEREO AMPLIFUERT SPECIFICATIONS Power 50 watts per channel RMS into 4 8 ohms S N Ratio gt 94dB THD 05 at rated power Mounting Horizontal or vertical mount ing Keyholes in back panel for vertical mount Connectors 12V Trigger IN OUT 3 5mm mini phone jack LINE IN Gold plated RCA SPEAKER All Screwless 4 pin plug in AC IN IEC type three prong Current Sensing Outlet Wire requirements 14 16 gauge two con duct
13. ith the volume turned up and the TV gets turned on to it s normal listening level the speaker level might drop when the system switches to TV This is normal performance and the user can adjust whole house speaker level and TV speaker level as needed depending upon the source selected and the users preference Using In Wall Volume Controls In a whole house audio distribution system an in wall volume control such as the Niles VCS100R or can be used to adjust the speaker level in a given room There are two options for using volume controls with the 50 Both of these examples assume use of a multi channel audio distribu tion amplifier such as the Niles SI 1260 Example1 In Wall Volume Control With a Variable Output Device When switching to a variable output device such as a TV with the 50 the volume control for the whole house system should be installed between the whole house amplifier and the 50 In whole house mode the 50 will pass the speaker level output of the whole house system straight through to the speakers A volume control installed between the whole house system and the 50 provides speaker level control of the whole house sources CD Tuner etc When switched to TV speaker level can be controlled using the TV remote control volume commands or the volume Up Down controls on the front of the TV SWITCHER STEREO AMPLIFIER AUTOMATED SWITCHER Example 2 In Wall Volume
14. or speaker wire for all speaker level connections AUTOMATED SWITCHER Trigger voltage IN 3 30VAC DC Trigger voltage OUT 12VDC 200mA AC requirement 1 20V 60Hz Input sensitivity 500mV full output Dimensions 2 1 4 H x 8 W x 7 1 2 D Weight 3 1 2 Ibs CONTENTS 50 IEC three prong AC power cord Screwless connectors gt A gt Self adhesive rubber feet STEREO AMPLITIUIER AUTOMATED SWITCHER Notes STEREO Notes AMPLIFIER AUTOMATED SWITCHER NILES Niles Audio Corporation www nilesaudio com 12331 S W 130 Street Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185 2004 Niles Audio Corporation All rights reserved Niles the Niles logo IntelliPad and Blending High Fidelity and Architecture are registered trademarks of Niles Audio Corporation MicroFlasher is a trademark of Niles Audio Corporation Because we strive to improve our products All other trademarks are the property of their respective owners Niles reserves the right to change product specifications without notice The technical and other information contained herein is not intended to set forth all technical and other specifications of Niles products Additional information can be obtained on line at www nilesaudio com or by calling Niles at 1 800 289 4434 04 04 Printed in Canada DS00395ACA
15. oun terclockwise will reduce volume NOTE The internal speakers of the TV should be switched off before proceeding Refer to the owner s manual for your TV for instructions SWITCHER S T ERE O AMPLIFIER AUTOMATED SWITCHER BEFORE PROCEEDING SET THE VOLUME CONTROL ON THE 50 TO THE MINIMUM POSITION FULLY COUNTERCLOCKWISE 1 Play a source CD Tuner on the whole house system Set the volume to a normal listening level Turn the TV on The 50 will sense the TV power activate and switch to the local source TV Using the remote control for the TV or the volume control on the TV turn the volume on the TV all the way up Use the on screen volume bar or numeric display for reference Slowly turn the volume control on the 50 clockwise until the audio from the TV is coming out of the speakers at the loudest level that will ever be used If the sound is distorted reduce TV volume This will be the maximum level the TV will play through the 50 and speakers 5 Reduce TV volume to a normal listening level Turn the TV off The system should switch back to the whole house system Properly tuned the speaker level from the whole house system and TV should be about the same at a normal listening level STEREO AMPLIFIER AUTOMATED NOTE speaker level when switched from the whole house system to the TV will not always be the same If the whole house system was set to CD w
16. rce common application for the 50 is to be able to switch the speakers used in a whole house audio system to a TV ina local room In order to be able to adjust the volume when switched to a local TV it is necessary to use the variable line level output of the TV when connecting to the 50 Doing so will allow the user to adjust the volume using the TV s remote control as if the TV speakers were being used 1 Connect the variable line level output of the TV to the RCA type Line IN jacks on the 50 STEREO AMPLIFIER AUTOMATED NOTE Some TVs have separate fixed non adjustable and variable line outs Some need to be switched using the on screen menu Refer to the TV manual for additional information Source Switching The 50 has two switching modes Current Sensing and AC or DC voltage trigger In current sense mode the TV power cord gets plugged into the Current Sensing AC outlet on the 50 When the TV is turned the 50 can detect an increase in current draw and will switch to the stereo Line IN The 50 will also switch to Line IN when 3 30VAC DC is applied to the Trigger IN Current Sensing Plug the AC power cord of the TV into the Current Sensing AC outlet on the 50 Volume Calibration The volume control on the 50 adjusts the amplifier output level when switched to the local device Line IN Turning the volume control clockwise will increase volume turning c
17. re accompany ing the appliance shock to persons SWITCHER STEREO AMPLIFIER AUTOMATED SWITCHER INTRODUCTION A common challenge in designing whole house audio video distribution systems is allowing a local source such as audio from a bedroom TV to play through the main system speakers in that room The TVA50 is the perfect solution When activated by either current sensing or a voltage trigger the 50 interrupts the main system s speaker level signal and switches to the local source When the device TV is turned OFF the speakers are switched back to the main system s audio program The 50 delivers the quality of audio amplification needed to match the high performance amplifiers used in whole house systems The TVA5O is also the perfect companion for added flexibility in whole house systems using Niles SI Series Multi Channel Amplifiers or ZR Series Multi Zone Receivers Whatever the application switching to a local TV computer portable CD or MP3 player the 50 is the clear choice of professional installers who need solid reliable performance from an automated switching amplifier STEREO AMPLIFIER AUTOMATED FEATURES AND BENEFITS Compact Size Allows installation on cabinet shelves side walls or back panels RCA Line In Jacks Two gold plated RCA jacks for line level audio input from local device 4 Pin Screwless Speaker Connectors Efficient Digital Technology
18. ype connectors Local source input 50 switches to this input in either current sense or 12V Trigger IN modes Volume Control Adjusts TVA50 amplifier output level 7 Speaker A Input Output Four pin speaker connector plugs Screwless and removable for easy installation Speaker B Input Output Four pin speaker connector plugs Screwless and removable for easy installation STEREO AMPLIFIER AUTOMATED SWITCHER e CURREN sensinc CE 120V doHz 8A AC OPTLET oo Aki A lt gt AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR Cr EL GB ZO a gt B U S Patent 5 075 634 and RSSUZEBHIER 5 510 753 Patent Pending 120V 60Hz 5A T3AL 250 Figure 1 O HH 5 6 7 8 Figure 2 STEREO AMPLIFIER 2 M NILES AUTOMATED SWITCHER iles Audio Corporation YE C N ami Florida USA A VOLUME _ OUT CSPEAKER A IN OUT IN H H F HHH H H D 9 LEU OUT 3 30VAC D VDC 200mA STEREO AMPLIFIER AUTOMATED SWITCHER To Current Sensing Outlet TV Power Cord To Unswitched Outlet TV Variable Line Out To Speaker A Input Sp
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