FRONT PANEL
INPUTS
– The Shenandoah™ Acoustic 100 is equipped with 2 types of input jacks. The ¼” input is unbalanced
and “line level” with a useable sensitivity from 100 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
the balanced signal. Additionally, the precision input scaling preamp contains a 50 Hz, 12 dB/octave high pass fi lter
(more effective and less intrusive than the more common 6 dB fi lters) and an “RFI” fi lter (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.
COMBINING XLR & ¼” INPUTS
– A unique feature of the Shenandoah™ Acoustic 100 is the ability to mix
the XLR balanced and ¼” unbalanced inputs on each channel. In many situations, this effectively makes the
amplifi er function as a 4 channel amplifi er. 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.
PHANTOM POWER
– An internal phantom power source (13.6 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 (C4500B,
4000B , etc.), Audio Technica (AT3035, 3032, Pro Series ,etc.), CAD, Shure and Crown.
ON-BOARD ALESIS® DIGITAL EFFECTS
– The Shenandoah™ Acoustic 100 contains a genuine Alesis®
15 program digital effects processor. Unlike other amplifi er manufacturer’s built-in digital effect units, we chose to
use an industry leader in processing with an undisputed reputation for realistic, high quality effects algorithms. Level
differences are normal when switching between different effects; just adjust the send and master levels accordingly.
The effects level control on each channel adjusts the send level to both the digital effects processor and the ¼”
effects send jack on the back panel. The digital effects level in the master section only controls the effects return
level from the on-board processor.
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