Genz-Benz 200 User Manual

OWNERS MANUAL

PRODUCT DESCRIPTION – The Shenandoah Stereo Delux 200™ is a 2 channel – 4 input, 200 watt true

Each channel is equipped with both a ¼” 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

shaping.
Each channel also contains 2 individual send controls to the dual on-board Alesisä 16 program digital effects circuit.

Flexible signal routing allows full exploitation of the lush stereo programs. The channel signals are then summed
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.

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INPUTS – The Shenandoah™ 200 is equipped with 2 types of input jacks. The ¼” input is unbalanced and “line/

instrument level” with a useable sensitivity from 50 mV to 1 volt. The input impedance is 150 k ohms. The ¼” input
will also accept most active balanced line sources, automatically unbalancing them by recognizing the tip portion of

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

sensitivity with the input gain control.

PHASE SWITCH – Each input 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
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

signals.

COMBINING XLR & ¼” INPUTS – A unique feature of the Shenandoah™ 200 is the ability to mix the XLR

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 DIGIT AL EFFEC TS – The Shenandoah™ 200 contains 2 genuine

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 suitable for all types of instruments or playing styles, but everyone should

quick acoustic guitar or mandolin work (long lush reverbs for example) may be the perfect program for jazz guitar,
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.
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

A ¼” 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.

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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
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

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

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 d iscriminat ing piece of
test equipment when used in this manner, another good reason to protect them! This is the way many touring sound

in “boost” mode, particularly common when adding higher midrange (bite) to a n 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 CONTR OL – The Shenandoah™ 200 is equipped with both ¼” and dual RCA

aux input jacks and aux level control. These rear panel j acks 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 retur n 2. Typically, best resul ts are obtained when this control is operated
between the 9:00 and 3:00 positions.

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MASTER STATUS LED INDICATORS - Output status L ED’s are provided to indicate Signal present and

Clipping. The Green LED monitors the pre Master Volume output signal from the pre amp before the power amp
section. The Re d 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
dedicated digital effects processors. Signal is line level and unbalanced.

DIRECT OUTPUTS – The Shenandoah™ 200 contains the most comprehensive direct o utput section

sense” when connecting with oth er equipment. The ¼” unbalanced outputs are true professional line level (+4 dbv)

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 re cording) console Direct outputs are provided for each channel, pre eq, pre effects, post channel
volume (to take advantage of the d ual summing inputs on each channel), and for left and right mixed outputs, post

POWER AMPLIFIER

circuits that are completely protected against overloads, short circuits and thermal faults. Output i s rated at 100 watts

a very cool feature that increases product reliability 10-fold over conventional designs. An internal cooling fan is
provided for maximum heat e xhaust through the front panel vents.

TUNER OUT – This jack is provided for use with all tuners that accept a ¼” 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 pre­selecting programs and then turning them on o r off when desired.

SPEAKER OUTPUT JACKS – The Shenandoah 200 provides 2 sets of parallel ¼” 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 additiona l 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 compression tweeters like those in the
Shenandoah™ 200.

POWER INPUT – The Shenandoah™ 200 is shipped from the factory with a standard IEC type power inlet

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

TWEETER LEVEL CONTROLS – A Tweeter Level Control is provided on each side of the speaker enclosure

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SHENANDOAH™ STEREO DELUX 200

ENGINEERING SPECIFICA TIONS

INPUTS

XLR Balanced channel input impedance: 2.2 k ohms
XLR Balanced channel input sensitivity: -60 to –30 dBV
¼” Unbalanced channel input impedance: 150 k ohms
¼” Unbalanced channel input sensitivity: 30 to +4 dBV
¼” Unbalanced aux input impedance: 10 k ohms
¼” Unbalanced aux input sensitivity: -20 to +4 dBV
Phantom power (XLR Inputs) +13.6V

AMPLIFIER OUTPUT (each channel)

Power at 8 ohm load: 70 watts RMS
Power at 4 ohm load: 100 watts RMS
THD + N (preamp): <0.02% typ.
THD + N (power amp): <0.05% typ.
Frequency response: 20 Hz – 20 kHz +/- 1dB

CHANNEL EQUALIZATION

Low frequency: 85 Hz shelving, +/-15dB
Low-Mid frequency (sweep): 100 Hz – 1.8 kHz , peaking, +/-12dB
High-Mid frequency (sweep): 350 Hz – 5 kHz , peaking, +/-12dB
High frequency: 8 kHz shelving, +/-15dB

DIRECT OUTPUTS

XLR balanced output level: -30 dBV nominal
XLR balanced output impedance: 150 ohms
¼” unbalanced output level: +4 dBv nominal
¼” unbalanced output impedance: 1 k ohm

EFFECTS LOOP

¼” unbalanced output level: -10 dBV
¼” unbalanced output impedance: 1 k ohm
¼” unbalanced input level: -10 dBV
¼” unbalanced input impedance: 47 k ohm
¼” effects cancel jack: short T-S or R-S cancels returns

DIGITAL EFFECTS

Processor type: Alesis® DSP engine (twin stereo processors)
Internal processing: 24 bit
A/D converter: 24 bit – 64X over-sampling
D/A converter: 24 bit – 128X over-sampling
Dynamic Range: 80 dB
THD + N (1 kHz): <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

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CAUTION!

WARNING!

• 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,
or loss resulting from such use.
normal operating conditions for a period of 3 years.

WARRANTY:

• 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.

• This warranty is effective only if a copy of the original sales receipt is presented at 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.

• All warranty service must be performed by a Genz Benz authorized service center.

• 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.

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

REV 4

7811 E. Pierce St. Scottsdale, AZ 85257

PH: 480-941-0705 FAX: [phone]

www.genzbenz. com

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