Genz-Benz 300 Musical Instrument Amplifier User Manual
Contents
1. MID FREQ HIGH PROGRAMS operate OF SOHOO GG H 2 VOLUME PHASE GAIN MID FREQ EFFECTS VOLUME MASTER VOLUME PARAMETRIC EQUALIZATION MASTER SECTION SHENANDOAH Osis CH O B FRONT PANEL INPUTS The Shenandoah Compak 300 is equipped with 2 types of input jacks The input is unbalanced and line level with a usable sensitivity from 100 mV to 1 6 volt The input impedance is 270 k ohms The input will also accept most active balanced line sources automatically unbalancing them by recognizing the tip portion of the balanced signal If an instrument offers an unbalanced output it should be connected to the unbalanced input of the Shenandoah amp Additionally the precision input scaling preamp contains a 45 Hz 12dB octave high pass filter more effective and less intrusive than the more common 6 dB filters and an RFI filter radio frequency interference to eliminate unwanted noise The XLR input jack is balanced and microphone level with a usable sensitivity from 60dBv to 30 dBv It is not a line level input It contains a precision full range differential microphone preamp with phantom power For use with higher level sources such as the balanced line level output from a keyboard or other instruments a balanced pad network will be necessary to use the balanced input For instance a Rapco Pad Blox 20 or 30 pad or similar product could be used COMBINING XLR amp 7 INPUTS A unique f2. using the amplifier without a speaker attached SPEAKER OUTPUT JACKS The Shenandoah Compak 300 provides 2 parallel 1 4 speaker output jacks Minimum total load is 4 ohms Two 8 ohm speaker cabinets The Shenandoah Compak 300 combos are factory equipped with a specially designed 8 ohm Neodymium speaker and a compression tweeter POWER AMPLIFIER The power amplifier used in the Shenandoah Compak 300 is a super efficient class D pulse width modulation amplifier powered by a state of the art switch mode power supply SMPS which produces almost no waste heat This ultra lightweight amplifier technology offers unparalleled performance and power and is the heart of this lightweight design POWER INPUT The Shenandoah Compak 300 is shipped from the factory with a standard IEC type power inlet connector and the appropriate detachable power cable for the market the amplifier was shipped to The power input section of the Shenandoah Compak 300 is auto configuring and will adapt to any input voltage from 100 240 volts without any adjustment by the user The AC mains fuse is internal and not user changeable The power supply inside the chassis of the Shenandoah Compak 300 is a highly sophisticated auto sensing auto con figuring switch mode power supply This class of supply does the energy conversion through a very efficient process which contributes to the lightweight design The power supply itself is internally protected and fused
3. ENZ AKMC Music Company 7811 E Pierce Street Scottsdale AZ 85257 PH 480 941 0705 FAX 480 946 2412 www genzbenz com REV 4 Note Genz Benz and Shenandoah are registered trademarks of Genz Benz Enclosures Inc 8
4. GENZ BENZ Owner s Manual GENZ BENZ GENZ BENZ FEATURES e Ultra Lightweight Compact Designs e SMPS Class D Power Amplification Technology e Two Pre Amp Channels w Active EQ e Neodymium Loudspeaker and Compression Tweeter e Input Phase Reverse Switch e 24 Bit Studio Quality Digital Effects e Phantom Power for Condenser Mics e Bottom mounted Tilt Foot PRODUCT DESCRIPTION The Shenandoah Compak 300 series of acoustic amps delivers warm rich tone and phenomenal output in surprisingly compact lightweight cabinets Each model produces 175 watts as a combo and 300 watts with an 8 ohm extension cabinet The amplifier is configured as a 2 channel 3 input platform and each channel is equipped with a unbalanced line input Channel 2 offers an XLR balanced microphone input with phantom power as well The 2 inputs on Channel 2 are summed mixed together at a 1 1 ratio so they can be used simultaneously Each channel then passes through independent 3 band equalizers with a sweepable midrange frequency Equalization centers were carefully selected for use with acoustic instruments Each channel also contains individual send controls to the on board 24 bit 15 program digital effects circuit The back panel contains 3 direct outputs with ground lift switch an effects loop auxiliary input headphone jack effects cancel jack and 2 1 4 speaker jacks 15 250HZ SKHZ 15 1 PLATES Oo 1 VOLUME Q EFFECTS Low Np Gain
5. LOOP 4 unbalanced output level Ys unbalanced output impedance 4 unbalanced input level Ys unbalanced input impedance 4 effects cancel jack DIGITAL EFFECTS Processor type Internal processing A D converter D A converter Dynamic Range THD N 1 kHz Sampling rate 2 2 k ohms 60 to 30 dBV 270 k ohms 20 to 4 dBV 175 watts RMS 300 watts RMS lt 0 02 lt 0 05 20 Hz 20 kHz 1dB 125 Hz shelving 15dB 250 Hz 5 kHz peaking 15dB 8 kHz shelving 15dB 30 dBV nominal 150 ohms 4 dBV nominal 1 k ohm 10 dBV 1 k ohm 10 dBV 47 k ohm short T S cancels return WaveFront DSP engine 24 bit 24 bit 64X oversampling 24 bit 128X oversampling 80 dB lt 0 01 48 kHz SAFE OPERATING REQUIREMENTS e Never set an amplifier on anything that will tip over or collapse under its weight e Provide a minimum distance of 25 4 mm 1 inch around all sides of the amplifier for sufficient ventilation The ventilation should not be impeded by covering the amplifiers vent openings with items such as newspapers table cloths curtains etc e No naked flame sources such as lighted candles should be placed on the Shenandoah Compak 300 amplifier e This amplifier should not be exposed to dripping or splashing and no objects filled with liquids such as vases or drinks shall be placed on this product e The Shenandoah Compak 300 amplifier should be connected to a
6. WER 100 240V 50 60HZ MAINS FUSE INTERNAL T 3 15A 250V SELF CONFIGURING POWER SUPPLY NO USER SERVICEABLE PARTS INSIDE 4 OHM MIN LOAD DO NOT GROUND SVM XXXXXXXXXX BACK PANEL DIRECT OUTPUTS The Shenandoah Compak 300 contains the most comprehensive direct output section available on any acoustic instrument amplifier Both XLR balanced and 1 4 unbalanced outputs make real world sense when connecting with other equipment The 1 unbalanced outputs are true professional line level 4 dBv with an output impedance of 1k ohm and can drive virtually any line level input including power amplifiers The XLR balanced output is hot mic level rated at 30 dBv This configuration allows the Shenandoah Compak 300 to drive very long cable lengths 250 feet without problems or added noise The XLR balanced direct outputs can be ground lifted with the global ground lift switch This switch lifts pin 1 on all of the XLR balanced outputs to break any ground loops between the Shenandoah Compak 300 and a PA system Separate Channel 1 and Channel 2 outputs are post channel volume pre effects to take advantage of the dual inputs on each channel while the Channel 1 2 output is post master volume post eq post effects to aid in sending a finished mixed signal to a PA system or external power amplifier Note The design of the Shenandoah Compak 300 also allows it s use as a preamp direct box It is okay to use t
7. against catastroph ic faults PHANTOM POWER An internal phantom power source 12 volts is provided for use with condenser mics This power source is on at all times and does not affect the standard operation of the amp even when a condenser mic is not used We use the DIN 45 596 P12 volt standard which will operate virtually all of the live sound reinforcement condenser microphones on the market Some boutique externally biased condenser mics will not be compatible and will require 48 volt phantom power We suggest live sound condenser mics by AKG Audio Technica CAD Shure and Crown TWEETER LEVEL CONTROL The rocker switch tweeter level control provides three positions for additional acoustic flexibility The positions are On Off and 6db The 6db position of the tweeter is about half as loud as the full On position CABINET DESIGN REMOVABLE CHASSIS FEATURE A unique element of the Shenandoah Compak 300 combo models is the ability to easily remove the amp head from the cabinet This allows the player to extract the am plifier and use it with larger speaker cabinets in larger venues The amp head can be easily transported in the pocket of a guitar gig bag In fact for some applications the Shenandoah Compak 300 could even function as a glorified state of the art direct box Removal of the chassis is simple We recommend first unplugging the speaker cable from the back of the chassis Step One eUnscrew the
8. eature of the Shenandoah Compak 300 is the ability to mix the XLR balanced and unbalanced inputs In many situations this effectively makes the amplifier function as a 3 chan nel amplifier The most effective way to use this feature is to set the volume on the channel using the XLR microphone input and then adjust the level control on the instrument itself assuming that it has one to blend levels between the 2 inputs Equalization will be common to both inputs on the channel INPUT O L LED This red O L LED senses the input signal to the preamp section and warns of input overload For the cleanest signal possible this LED should only flash with the strongest signal peaks Adjust this sensitivity with the volume control of your instrument and the Shenandoah Compak 300 s channel volume Adjust the final overall volume with the amps master volume PHASE SWITCH Each channel is provided with a phase reverse switch By reversing the phase of the input signal feedback tendencies can be reduced if caused by sympathetic vibrations between the speaker and the instrument Under some conditions changing the phase can drastically improve the acoustic output from the amplifier and can improve the playability of some instruments ON BOARD STUDIO QUALITY DIGITAL EFFECTS The Shenandoah Compak 300 contains a studio quality 24 bit 15 program digital effects processor Using pro audio industry digital processing hardware we have achieved realis
9. ed so that the chassis controls point up towards the performer SPECIFICATIONS SHEN CPK H head SHEN CPK 8T SHEN CPK 10T Rated Power Rated Power Rated Power 175W 80hms 300W 4ohms 175W 80hms 300W 4ohms 175W 80hms 300W 4ohms Dimensions Dimensions Dimensions 3 5 H x 10W x 10 25 D 13 25 H x 11 25 W x 11 365 D 16 625 H x 12 W x 11 365 D Weight Weight Weight 3 5 LBS 16 5 LBS 19 LBS OPTIONAL EXTENSION CABINETS We offer pan identical extension cabinet designs to mate with the combo a pee versions aE SHEN CPK EXTS8 When matched with the 8 combo this small rig will deliver 300 watts total output SHEN CPK EXT10 When matched with the 10 combo this small rig will deliver 300 watts total output We offer optional thick padded carry bags for our Shenandoah Compak 300 combos Amp Sac Sm Fits our Shen CPK 8T Amp Sac Lg Fits our Shen CPK 10T Shenandoah Compak 300 ENGINEERING SPECIFICATIONS INPUTS XLR Balanced input impedance XLR Balanced input sensitivity Ys Unbalanced input impedance Ys Unbalanced input sensitivity AMPLIFIER OUTPUT Power at 8 ohm load Power at 4 ohm load THD N preamp THD N power amp Frequency response CHANNEL EQUALIZATION Low frequency Mid frequency sweep High frequency DIRECT OUTPUTS XLR balanced output level XLR balanced output impedance 4 unbalanced output level Ys unbalanced output impedance EFFECTS
10. he amplifier without speakers attached EFFECTS LOOP A series effects loop is provided so an out board effects processor can be used with or in place of the on board Digital Effects unit The return level from an external processor into the 1 2 effects return jack should be adjusted using the controls of the external processor A 4 EFFECTS CANCEL jack is provided on the back panel to mute both internal and external effects via footswitch Any standard single button latching footswitch with shielded cable may be used Signal is muted when the switch is closed The on board effects can be turned off by using the program selection labeled bypass All other on board effects on the Shenandoah Compak 300 can be used in con junction with an out board effects unit plugged into the effects loop AUX INPUT A 1 4 unbalanced line level aux input is provided that sums directly to the main output bus con trolled by the master volume control This input is ideal for practicing with recorded tracks from a CD player IPOD or MP 3 player It is recommended to use a cable with left amp right signals connected to a Y jack summing the signal into the aux input jack Adjust the level of the playback source to balance with the guitar s volume HEADPHONE OUT A 1 4 TRS jack is provided for connection to headphones Do not connect this output to anything but headphones For silent practicing just unplug the speaker There is no harm
11. large thumbscrews on both sides of the cabinet elt is recommended to screw these back into the chassis after the amp is removed so as not to loose them Step Two eAfter the thumbscrews are removed gently slide the chassis forward using both hands to move it forward Step Three eAs the chassis appears from within the cabinet grab it from the front end and remove it completely from the cabinet USING THE SHENANDOAH COMPAK 300 CHASSIS ONLY After removing the amplifier chassis there are a variety of uses possible Silent recording as a preamp direct box practicing by using the headphone jack and aux input for an MP3 or CD player using the amplifier as a small mixer amp with 2 PA speakers or using the head with a much larger speaker cabinet for large venues BOTTOM MOUNTED TILT FOOT This tilt foot allows the cabinet to be tilted up towards the performer enhancing the projection of the speaker SHENANDOAH COMPAK 300 COMBOS SHEN CPK 8T This micro amp produces astonishingly high output warm natural tone with pristine clarity This combo uses our Neodymium 8 woofer and soft dome tweeter The unique cabinet is designed so that the chassis controls point up towards the performer ee we a 3p i oS GENZ BENZ SHEN CPK 10T This larger model is still surprisingly small with a larger output and tonal footprint This combo uses our Neodymium 10 woofer and soft dome tweeter The unique cabinet is design
12. mains socket outlet Dower receptacle with a protective earth ground connection at all times e The amplifiers mains plug power plug is considered the disconnect device and the connection must remain accessible at all times e This amplifier is capable of producing sound pressure levels that may cause hearing loss e There are no user serviceable parts and hazardous operating voltages are present inside this unit Always consult a qualified repair facility for service WARNING e The use and operation of this device constitutes an agreement of full release of any and all liability connected with it s use Only persons familiar with the operation of high powered professional audio equipment should attempt to operate this device e In addition by use of this device the user agrees to hold Genz Benz and it s designers sales agents and all other affiliates and related parties harmless in the event of any accident injury damage or loss resulting from such use e Manufacturer s sole responsibility is to provide a warranty on the specified performance of the product under normal operating conditions for a period of 3 years WARRANTY e Genz Benz warrants the model Shenandoah Compak 300 to be free from defects in materials and workmanship for a period of 3 years from the date of purchase when purchased from an authorized Genz Benz dealer e This warranty does not cover normal wear and tear incurred from the normally designed use of the
13. on is 125 Hz shelving curve This frequency is particularly handy when dealing with low frequency feedback from a big dreadnaught guitar A combination of volume reduction and turning down the low frequency control will generally get good results Become familiar with the action of the controls since their effective gain range is quite large The low frequency control is also handy for adding some bottom to a baritone sax and chunk to a mandolin or mando cello HIGH FREQUENCY EQ The corner frequency of the high frequency section is 8 kHz shelving curve This frequency is especially useful for taming the bright harshness of some mandolins violins brass and reeds It can also be used to help acoustic guitars cellos and flutes cut through other players in loud club situations MID FREQUENCY EQ The sweepable mid section features 15 dB of cut or boost with a bandwidth approximately 1 octave wide The center frequency of this filter is continuously user adjustable from 250 Hz to 5 kHz with a single control This filter is typically but not always used to reduce or remove offending frequencies in the instrument s pick up response Removing only the minimum amount necessary will yield the most acoustically rewarding results The easiest and most repeatable way to determine the offending frequency range is to boost the mid level somewhat but not to the point of feedback and then while playing sweep the frequency control slowly acros
14. product e This warranty is effective only if a copy of the original sales receipt is presented at the time of warranty service e This limited warranty is completely transferable to any subsequent buyer as long as the original sales receipt is also transferred to such subsequent buyer e All warranty service must be performed by a Genz Benz authorized service center e Before returning any unit for service a returned merchandise authorization number RMA must be obtained by calling 480 941 0705 e This warranty is valid for the US amp Canada only For all products sold outside the USA warranty is handled through our international distributor for each country For more information visit our website www genzbenz com Declaration of Conformity 89 336 EEC EMC Directive Manufacturer s Name Genz Benz A Division of KMC Music Manufacturer s Address 7811 East Pierce Street Scottsdale AZ 85287 U S A Product Type Audio Amplifier Model Number Shenandoah Compak 300 all versions Operating Power Condition 100 115 230 240 V 50 60 Hz Effective Date 01 01 2009 Conforms to the Following Standards X EN 55013 2001 A1 2003 X EN 55020 2002 A1 2003 X EN 60065 2001 A1 X IEC 61000 3 2 2000 X IEC 61000 3 3 1994 A1 2001 X IEC 61000 4 2 X IEC 61000 4 3 X IEC 61000 4 4 X FCC 15 107 and 15 109 X RoHS Directive 2002 95 EC X WEEE Directive 2002 96 EC X CE Mark LV Directive 73 23 EEC GENZ B
15. s its range You may need a third hand until it be comes second nature but soon you will find out just how quick it can be You will hear a clear and obvious accentua tion of the ugliness you want to remove The ear is a most sensitive and discriminating piece of test equipment when used in this manner another good reason to protect them This is the way many touring sound engineers equalize since it is quick accurate and repeatable Occasionally you will find need to use the mid section in boost mode particularly common when adding higher mids bite to an otherwise dull instrument or adding low mid body to an otherwise thin sound Spend some time experimenting so that the process becomes creative as well as corrective It may be helpful to know The 9 O Clock position is 300Hz the 12 O Clock position is 1 25KHz and the 3 O Clock position is 3KHz EFFECTS VOLUME This control adjusts the amount of the effects signal return Adjust this in conjunction with the channel effects level control MASTER VOLUME The master volume control adjusts the overall volume of channel 1 channel 2 and the effects return either on board or out board Typically best results are obtained when this control is operated between the 9 00 o clock and 2 00 o clock positions CNSUMeTION 200 wars GENZ BENZ SPEAKER AUX INPUT DIRECT OUTPUTS SHENANDOAH COMPAK 300 LINE LEVEL GLOBAL PIN 1 175 WATTS 8 OHM 300 WATTS 4 OHM l A Ta cno INPUT PO
16. tic high quality effects algorithms Level differences are normal when switching between different ef fects just adjust the channel send and master level controls accordingly The effects level control on each channel adjusts the send level to the digital effects processor The digital effects level in the master section controls the effects return level from the processor In general turning up the channel effects send will yield more lush effects NAME DESCRIPTION Hall 1 Bright hall reverb Hall 2 Warm hall reverb Room 1 Hardwood studio reverb Room 2 Ambient room reverb Room 3 Warm room reverb for guitars and rhythm instruments Plate 1 Classic plate reverb for lead vocals and instruments Plate 2 Sizzling bright plate reverb for vocals Plate 3 Short vintage plate reverb Chorus Chorus Tonal variations in pitch and volume Flange Flanger for jet wash effects Delay 1 125ms slapjack delay Delay 2 190ms slapjack delay Chorus Plate Chorus with reverb plate Chorus Room Auto wah guitar effect with reverb Bypass No effect Pitch Shift Rotary Rotary speaker emulation ACTIVE EQUALIZATION The Shenandoah Compak 300 offers a 3 band with sweepable mid active equaliz er for each channel These equalizer networks similar to those found on professional sound consoles are very useful tools when used correctly LOW FREQUENCY EQ The corner frequency of the low frequency secti
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