Genz-Benz 200 User's Manual
Contents
1. AMPLIFIER OUTPUT each channel Power at 8 ohm load Power at 4 ohm load THD N preamp THD N power amp Frequency response CHANNEL EQUALIZATION Low frequency Low Mid frequency Sweep High Mid frequency Sweep High frequency DIRECT OUTPUTS 13 6V 70 watts RMS 100 watts RMS lt 0 02 typ lt 0 05 typ 20 Hz 20 kHz 1dB 85 Hz shelving 15dB 100 Hz 1 8 kHz peaking 12dB 350 Hz 5 kHz peaking 12dB 8 kHz shelving 15dB XLR balanced output level 30 dBV nominal XLR balanced output impedance 150 ohms w unbalanced output level 4 dBv nominal Y unbalanced output impedance 1k ohm EFFECTS LOOP w unbalanced output level 10 dBV Y unbalanced output impedance 1k ohm w unbalanced input level 10 dBV 4 unbalanced input impedance 47 k ohm effects cancel jack DIGITAL EFFECTS Processor type Internal processing A D converter D A converter short T S or R S cancels returns Alesis DSP engine twin stereo processors 24 bit 24 bit 64X over sampling 24 bit 128X over sampling Dynamic Range 80 dB THD N 1 kHz lt 0 01 Sampling rate 48 kHz INTERNAL PRESET STEREO EFFECTS PROGRAMS 3 Plate Reverbs 1 Chorus Plate 3 Room Reverbs 1 Chorus 2 Hall Reverbs 1 Flange 1 Rotary Effect 2 Delays long and short 1 Chorus Room 1 Reverse Scoop Due to continuing product improvements and chan2. the time of warranty service 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 Declaration of Conformity 89 336 EEC EMC Directive Manufacturer s Name Genz Benz a division of Kaman Music Manufacturer s Address 7811 East Pierce Street Scottsdale AZ 85287 U S A Product Type Audio Amplifier Model Number Shenandoah Stereo Delux 200 Operating Power Condition 115 230 V 50 60 Hz Effective Date 01 01 2006 Conforms to the Following Standards X EN 55013 2001 A1 2003 X EN 55020 2002 A1 2003 X EN 60065 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 47CFR Part 15 B Class B RoHS Directive 2002 95 EC X WEEE Directive 2002 96 EC X CE Mark LV Directive 73 23 EEC GENZ BENZ 7811 E Pierce St Scottsdale AZ 85257 PH 480 941 0705 FAX 480 946 2412 www genzbenz com A Kaman Music Corporation Bloomfield CT REV 4 o
3. GENZ BENZ DShenandaah T E R E I gt E 1 J es LY i PRODUCT DESCRIPTION The Shenandoah Stereo Delux 200 is a 2 channel 4 input 200 watt true stereo acoustic instrument amplifier with 2 separate Alesis digital effects engines full stereo DSP algorithms and 2 x 10 speakers and compression tweeters on our unique flexed baffle Each channel is equipped with both a unbalanced line input and an XLR balanced microphone input with phantom power The 2 inputs on each channel are summed mixed together at a 1 1 ratio Each channel then passes through independent 4 band equalizers with 2 sweep able midrange frequency bands This powerful equalizer circuitry was developed specifically for use with acoustic instruments and offers maximum flexibility in tone shaping Each channel also contains 2 individual send controls to the dual on board Alesisa 16 program digital effects circuit Flexible signal routing allows full exploitation of the lush stereo programs The channel signals are then summed and panned mixed with the digital effects returns and passed on to the internal 200 watt stereo power amplifier The back panel contains 4 direct balanced outputs with ground lift switch 4 unbalanced line outputs 2 effects loops tuner out effects cancel jack and 4 1 4 speaker jacks INPUTS The Shenandoah 200 is equipped with 2 types of input jacks The 14 input is unbalanced and line instrument lev
4. ectly to the left and right amplifiers A 4 TRS effects cancel jack is provided on the back panel to mute the internal effects via footswitch Any standard 2 button latching footswitch may be used Ring controls Effects Return A and Tip controls Effects Return B The effects signal is muted when the switch is open LED s show when the effects are active 2 Name Description Short vintage plate reverb Auto wah guitar effect with reverb ACTIVE 4 BAND EQUALIZATION Each channel of the Shenandoah 200 contains a separate 4 band with 2 sweepable mids active equalizer These equalizers 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 section is 85 Hz with a shelving curve type This frequency is particularly handy when dealing with low frequency feedback from a big dreadnaught guitar cello or upright bass With a boomy instrument on a small stage a combination of volume reduction and turning down the low frequency control will generally get good results The low frequency control is also handy for adding some bottom to a baritone sax and chunk to many stringed instruments HIGH FREQUENCY EQ The corner frequency of the high frequency section is 8 kHz shelving curve type This frequency is especially useful for taming the bright harshness of some mandolins violins brass and reeds It can also be used to hel
5. el with a useable sensitivity from 50 mV to 1 volt The input impedance is 150 k ohms The 4 input will also accept most active balanced line sources automatically unbalancing them by recognizing the tip portion of the balanced signal Additionally the precision input scaling preamp contains a 45 Hz 12 dB octave high pass filter more effective and less intrusive than the more common 6 dB filters and an RFP filter radio frequency interference to eliminate unwanted noise The XLR input jack is balanced and microphone level with a useable sensitivity from 60dBv to 30 dBv 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 a balanced pad network will be necessary to use the balanced input Phantom power is 13 6 volts compatible with virtually all commonly used condenser microphones Dynamic microphones can be used with no ill effect PREAMP GAIN CONTROL This level control sets the amount of gain at the Input of the Preamp Use this control to set the input level in conjunction with the overload LED indicator INPUT O L LED The Red Overload 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 input gain control PHASE SWITCH Each input is provided w
6. ges all specifications are subject to change without notice CAUTION Never set an amplifier on anything that will tip over or collapse under its weight These amplifiers are capable of producing sound pressure levels that may cause hearing loss There are no user serviceable parts inside these units 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 its use Only persons familiar with the operation of high powered audio equipment should attempt to operate this device In addition by use of this device the user agrees to hold Genz Benz Enclosures Inc and its 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 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 Enclosures Inc warrants the model Shenandoah 200 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 This warranty does not cover normal wear and tear incurred from the normally designed use of the product e This warranty is effective only if a copy of the original sales receipt is presented at
7. id section in boost mode particularly common when adding higher midrange 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 AUXILUARY INPUT LEVEL CONTROL The Shenandoah 200 is equipped with both 1 4 and dual RCA aux input jacks and aux level control These rear panel jacks are internally summed and feed the stereo mix via the aux level control Both aux inputs are line level for use with drum machines CD MP3 and tape players MASTER VOLUME The stereo master volume control adjusts the overall volume of the mix of channel 1 channel 2 effects return 1 and effects return 2 Typically best results are obtained when this control is operated between the 9 00 and 3 00 positions MASTER STATUS LED INDICATORS Output status LED s are provided to indicate Signal present and Clipping The Green LED monitors the pre Master Volume output signal from the preamp before the power amp section The Red LED indicates Clip Limit and indicates that the maximum power threshold has been crossed and the internal soft clip limiter is active Driving the amp 6db beyond this point will cause gradual clipping CHANNEL INSERTS EFFECTS LOOP The Shenandoah 200 is equipped with insert points on each channel AND on the left and right main signal paths These points are handy for inserting compressors and dedica
8. ion tweeters like those in the Shenandoah 200 POWER INPUT The Shenandoah 200 is shipped from the factory with a standard IEC type power inlet connector and the appropriate power cable for the market the amplifier was shipped to The power transformer is universal input 115 230 volt 50 60 Hz with a voltage selector switch located above the inlet connector Be sure that this switch is in the correct position matching your local power system BEFORE connecting the Shenandoah to the power source There is an AC mains fuse with a spare fuse included located in the small slide out tray on the IEC power inlet connector Always replace with the correct value fuse as indicated on the fuse chart located on the back of the amplifier TWEETER LEVEL CONTROLS A Tweeter Level Control is provided on each side of the speaker enclosure for maximum tone flexibility The rocker switch control offers FULL tweeter output 6db level or a tweeter OFF position Experiment with different settings to find the best position for your personal taste SHENANDOAH STEREO DELUX 200 ENGINEERING SPECIFICATIONS INPUTS XLR Balanced channel input impedance 2 2 k ohms XLR Balanced channel input sensitivity 60 to 30 dBV w Unbalanced channel input impedance 150 k ohms V4 Unbalanced channel input sensitivity 30 to 4 dBV w Unbalanced aux input impedance 10 k ohms 4 Unbalanced aux input sensitivity 20 to 4 dBV Phantom power XLR Inputs
9. ith 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 output from the amplifier and can improve the playability of some instruments PAN CONTROL Each input channel is provided with a pan control which adjusts the balance of the input signal between the left and right output amplifiers This control does not affect the assignment of the effects send signals COMBINING XLR amp 1 2 INPUTS A unique feature of the Shenandoah 200 is the ability to mix the XLR balanced and 4 unbalanced inputs on each channel In many situations this effectively makes the amplifier function as a 4 channel amplifier The most effective way to use this feature is to set the volume on the channel using the XLR microphone input and then adjusting 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 ON BOARD ALESIS STEREO DIGITAL EFFECTS The Shenandoah 200 contains 2 genuine Alesisa 16 program stereo digital effects processors Unlike other amplifier manufacturer s built in digital effect units we chose to use an industry leader in processing with an undisputed reputation for realistic high quality stereo effects algorithms Not all effects will be
10. p acoustic guitars cellos and flutes cut through other players in loud club situations or where drums are present MIDRANGE EQ The sweep mid section features 2 independent midrange equalizers peaking curve type with over 12 dB of cut or boost and a bandwidth approximately 1 octave wide The center frequencies of these equalization filters are continuously user adjustable from 100 Hz to 1 8kHz LOW MID and 350 Hz to 5 kHz HIGH MID with the corresponding frequency control These filters are 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 while playing sweep the frequency control slowly across its range You may need a third hand until it becomes second nature but soon you will find out just how quick it can be You will hear a clear and obvious accentuation of the ugliness you wish to remove Then reduce the gain control until the sound you desire is attained 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 m
11. suitable for all types of instruments or playing styles but everyone should find a good selection of solid useable programs Just keep in mind that a program that doesn t work well for your quick acoustic guitar or mandolin work long lush reverbs for example may be the perfect program for jazz guitar sax or flute To accommodate the wide range of sum amp difference effects in the stereo decay envelope software effects volume differences are normal when switching between different effects programs Adjust the effects send and master levels accordingly One of the most powerful features of the Alesis DSP engine is its ability to process a large amount of audio data in real time This allows us to take advantage of several important concepts in generating a believable stereo image By delaying a portion of the signal by an early reflection ratio applying DSP processing in stereo to this signal then summing it back with the original signal and returning the mix to the program bus the resulting stereo image is big lush and exceptionally stable The Effects Send A control on each channel adjusts the send level to digital effects processor A and the Effects Send B control on each channel adjusts the send level to digital effects processor B The Digital Effects Level control in the master section adjusts the effects return level from the corresponding processor The effects return Signals are summed and routed dir
12. tected against overloads short circuits and thermal faults Output is rated at 100 watts per channel into 4 ohms with excellent overload recovery characteristics A unique feature of this amplifier is the on silicon temperature sensor that automatically tracks and adjusts the amplifier s operating and protection parameters a very cool feature that increases product reliability 10 fold over conventional designs An internal cooling fan is provided for maximum heat exhaust through the front panel vents TUNER OUT This jack is provided for use with all tuners that accept a 14 input The signal from this jack is always present and works well with all known tuners EFFECTS JACK This jack is provided for use with the 2 button DSP footswitch with comes standard with the Shenandoah 200 This footswitch turns both DSP A and B programs ON and OFF This is a useful tool for pre selecting programs and then turning them on or off when desired SPEAKER OUTPUT JACKS The Shenandoah 200 provides 2 sets of parallel 1 4 speaker output jacks Minimum total load is 4 ohms 2 x 8 ohm loudspeakers on each output channel The combo is equipped with a 10 8 ohm loudspeaker and compression tweeter per side and may drive an additional 8 ohm extension speaker cabinet per side We offer the Shen 200 EXT L R speaker enclosures that are a matched pair of Left and Right imaged extension speakers that offer the same compliment of 10 woofer and compress
13. ted digital effects processors Signal is line level and unbalanced DIRECT OUTPUTS The Shenandoah 200 contains the most comprehensive direct output section available on any acoustic instrument amplifier The XLR balanced and unbalanced outputs make real world sense when connecting with other equipment The 14 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 200 to drive very long cable lengths 250 feet without problems or added noise and is compatible with all commonly encountered mixing consoles 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 ground any loops between the Shenandoah 200 and a PA system or recording console Direct outputs are provided for each channel pre eq pre effects post channel volume to take advantage of the dual summing inputs on each channel and for left and right mixed outputs post channel eq post effects and post master volume to aid in sending a finished mixed signal to a PA system power amplifier or powered speaker POWER AMPLIFIER The Shenandoah 200 is equipped with dual advanced monolithic power amplifier circuits that are completely pro
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