Gain
Use the Gain knob to set the level of the signal for Channel 2. If the red LED flashes
when you play, lower the gain until the flashing stops. If Channel 2 is unused, set the
Gain to 7 o’clock.
Low
Shelving bass, ±10 dB @ 100Hz. Boost here to add weight to the sound. In general,
boost bass at low volumes and flatten it out (or cut) at higher levels. With the dial set
at 12 o’clock, the control is effectively out of the circuit.
Mid
A resonant-style filter, ±12dB @ 1.2kHz. This control affects how well the instrument
blends in or stands out in the mix. At loud volumes a midrange cut will achieve a
more natural sound. With the dial set at 12 o’clock, the control is effectively out of
the circuit.
High
Shelving treble, ±12dB @ 10kHz. Boost highs to add “air” to the sound of the
instrument. With the knob set at 12 o’clock, the control is effectively out of the
circuit.
Brilliance
A resonant-style tone circuit, ±12dB @ 10kHz. Add presence and “zing” to high
frequencies. With the knob set at 12 o’clock, the control is effectively out of the
circuit.
Anti-Feedback
A fixed-level, variable-frequency notch filter -14dB @ 20 - 400Hz. If you encounter
low-frequency feedback, sweep this control to isolate and eliminate it. Many guitars
will benefit with the Anti-Feedback knob set at about 11 o’clock. The Anti Feedback
filter is off at the 7 o’clock position.
Phase
Use the phase switch in conjunction with the Anti-Feedback filter to eliminate
acoustic feedback. See “About Acoustic Feedback” on page 6.
Digital Reverb
Program
The five program numbers correspond to a graduated sequence of reverbs starting with small room
(1) to large hall (5).
Ch 1 Assign
Push in this switch to assign reverb to Channel 1.
Ch 2 Assign
Push in this switch to assign reverb to Channel 2.
Level
Raise the level for a “wetter” sound.
Low Cut Switch
Push in this switch if the sound is too bassy or if low frequency feedback cannot be managed by
the Anti-Feedback and phase controls.
Aux Channel
Aux Input
Plug a CD player into this input. The ¼" TRS Aux Input will mix a stereo signal to mono. You may
also plug in a drum machine or keyboard to the Aux input with a standard mono cable.
Aux Level
Use this to control the level of the device you plug into the Aux Input. Note that the Aux channel is
independent of the Master Volume and the Mute switch, so you can play pre-recorded music on
your breaks. If the Aux channel is unused, set the Aux level to 7 o’clock.
6
7
Front Panel -
Channel 2
(microphone or instrument channel)
XLR Input
Plug in any balanced dynamic or condenser microphone here. You may also connect
an outboard preamp with balanced XLR out to this input. Note that the XLR input will
shut off if you attempt to use it simultaneously with the Channel 2 (¼") input.
Phantom Power Switch
Provides 48 Volts phantom power to the XLR Input for condenser microphones and
phantom-powered preamp/DIs.
¼" Input
This input has a very wide operating range. It will accept high- or low-level signals
from active or passive pickups. Note that the XLR input will shut off if you attempt to
use it simultaneously with the Channel 2 (¼") input.
Clip LED
The Clip LED will flash when the gain level is too high and the signal becomes
distorted. If the light comes on when you play, lower the gain until the distortion goes
away. Note that the clip LED monitors both the Channel 2 XLR and ¼" inputs.
About Acoustic Feedback
Feedback usually occurs in the lowest octave of your instrument, generally with two notes about a half step apart.
Like blowing air across a bottle, the lower type of feedback (cavity resonance) starts when the sound pressure coming
out of the speakers excites the resonant air chamber inside your instrument. We have found that it is effective to tune
out an instrument's cavity resonance feedback with the Anti-Feedback (notch filter) in the Loudbox. For acoustic
guitar this occurs at G# on the low E-string, or at about 100Hz. Turn the Anti-Feedback knob to about 11 o’clock to
dial out this resonance. Note that the circuit can be effectively defeated by moving the dial to the OFF (7 o’clock )
position.
The higher range of feedback (top resonance) usually starts about a half or whole step above cavity resonance of the
instrument. Top resonance feedback happens when the sound pressure coming off the speakers excites the resonant
frequency of the soundboard of your instrument. For acoustic guitar this occurs at A and above on the low E-string.
Push the Phase switch in and out until you find the position that subdues top resonance feedback.
Phantom Power FAQs
What devices are safe with 48V phantom power?
1
Phantom-powered condenser microphones
2
Balanced dynamic microphones
3
Many new wireless units
4
A preamp/DI designed for phantom-power operation, such as the Fishman Pro-EQ Platinum
What devices are potentially unsafe with 48V phantom power?
1
An unbalanced dynamic mic
2
A balanced line-level device that is not designed to accept phantom power (ex: some effects processors)
3
A balanced wireless receiver that is not designed to accept phantom power. Consult the manufacturer of the
wireless unit for compatibility
4
An unbalanced signal from an instrument preamp or stompbox
Important Note: Turn off phantom-power if you plug any of the above into the XLR input.
Gain
Low
Clip
48V
Channel 2
XLR Phantom
Power
Gain
Low
Clip
48V
Channel 2
XLR Phantom
Power
Gain
Low
Clip
48V
Channel 2
XLR Phantom
Power
Gain
Low
Clip
48V
Channel 2
XLR Phantom
Power
Gain
Off
Anti
Feedback
Low
Mid
High
Brilliance
Clip
Gain
Off
Anti
Feedback
Low
Mid
High
Brilliance
Clip
Gain
Off
Anti
Feedback
Low
Mid
High
Brilliance
Clip
Gain
Off
Anti
Feedback
Low
Mid
High
Brilliance
Clip
Gain
Off
Anti
Feedback
Low
Mid
High
Brilliance
Clip
1
2
3
4
5
Off
Ch 1
Ch 2
Anti
Feedback
Brilliance
Phase
Digital Reverb
Level
Lo C
Phase
1
2
3
4
5
Off
Ch 1
Ch 2
Anti
Feedback
Brilliance
Phase
Digital Reverb
Level
Lo C
Phase
1
2
3
4
5
Off
Ch 1
Ch 2
Anti
Feedback
Phase
Digital Reverb
Level
Aux I
Lo Cut
Phase
Mute
Power
Aux Level
Master
Volume
Aux In
Lo Cut
