ACOUSTIC RADIATOR (RESO) 1
INPUT
The Acoustic Radiator 1 is a twin channel unit. Channel 1 is for Active or Piezo inputs,
while Channel 2 works for Low Z or Microphone inputs on either jack or XLR.The
two channels allow both mic and pick-up inputs to be mixed together to give the best
possible sound for the acoustic guitar. Alternatively one channel can be used for the
guitar and the other for a vocal mic to form a mini PA system.
ACTIVE / PIEZO SWITCH
The Active / Piezo switch allows channel 1 input to be set for active guitars (those with
a built-in preamp) or passive / piezo instruments where a higher input level and
impedance would be required.
PHANTOM POWER SWITCH
This can be switched in to apply a Phantom Power voltage to channel 2 inputs.This is
only for use with suitable capacitor microphones. Do not switch this in for any other
type of input to channel 2.
INPUT LEVEL CONTROL / LED LEVEL INDICATOR
Once you have set your instrument to the required Eq settings on both the amplifier
and the instrument you should then set the INPUT LEVEL to the most efficient level to
optimise signal to noise ratio.The optimum level is when the input level LED is
indicating GREEN most of the time for normal playing, with occasional peaks flashing
RED.The LED indicates the level for both channel 1 and channel 2.
PHASE SWITCH IN / OUT
This switch reverses the Phase of the signal through the amplifier and is used to help
eliminate standing wave feedback. As such it is very dependent upon the position of the
player relative to the amplifier. If feedback is occurring try altering the setting of this
switch to cancel out the standing wave between you and the amplifier.
SHAPE IN / OUT
This switch introduces a natural pre-shape to the sound of channel 1 adding a bass boost, a mid cut and a
treble boost that suits both strumming and finger picking styles of playing.
Eq - TREBLE & BASS
These controls can boost or cut the amount of Treble and Bass of the unit. In their centre position (12
o’clock) they have no effect i.e. the Eq is flat.
NOTCH FREQUENCY
The Acoustic Radiator 1 has a single Notch filter applied to channel 1.This can be switched in and adjusted
to eliminate ‘body resonance’ feedback of the instrument at higher playing levels. Adjust the Notch
Frequency until the body resonance reduces - this will be the optimum position for the instrument.This
Notch has a fixed ‘Q’ that has been optimised for acoustic guitar.
REVERB
Reverb can be added to the sound of the acoustic instrument to make it sound more vibrant and alive. It
simulates the sound of the instrument being played in various acoustic environments.The level of reverb to
direct sound can be adjusted using the Level control. Switches have been provided to select between Long
and Short decay characteristics of both Hall and Plate reverbs.The reverb is situated after the Effects
Return and as such can be added to other effects connected via these sockets.When switched in, reverb is
added to both channel 1 and 2.
OUTPUT
This sets the desired playing level/volume of the amplifier.
ACOUSTIC RADIATOR (RESO) 2
INPUTS
The Acoustic Radiator 2 is a twin channel unit. Channel 1 is for Active or Piezo inputs, while Channel 2
works for Low Z or Microphone inputs on either jack or XLR.The two channels allow both mic and pick-
up inputs to be mixed together to give the best possible sound for the acoustic guitar. Alternatively one
channel can be used for the guitar and the other for a vocal mic to form a mini PA system.
ACTIVE / PIEZO INPUTS (CHANNEL 1)
Channel 1 has two input jack sockets, one for active guitars (those with a built-in preamp) and the other
for passive / piezo instruments where a higher input level and impedance is required.
PHANTOM POWER SWITCH (CHANNEL 2)
This can be switched in to apply a Phantom Power voltage to channel 2 inputs.This is only for use with
suitable capacitor microphones. Do not switch this in for any other type of input to channel 2.
PHASE SWITCH
This switch reverses the Phase of the signal through the amplifier and is used to help eliminate standing
wave feedback, as such it is very dependant upon the position of the player relative to the amplifier. If
feedback is occurring try altering the setting of this switch to cancel out the standing wave between you
and the amplifier.
INPUT LEVEL CONTROL / VU METER LEVEL INDICATION
Once you have set your instrument to the required Eq settings on both the amplifier and the instrument
you should then set the INPUT LEVEL to the most efficient level to optimise signal to noise ratio.The
optimum level is when the input level VU Meter is indicating between minimum and 0dB most of the time
for normal playing, with occasional peaks into the Red section of the meter.The VU meter indicates the
level for both channel 1 and channel 2.
Eq
The Acoustic Radiator 2 features identical 5 band Eq for both channels, the large rotary controls for Bass,
Middle and Treble allow you to set with ease the sound you require. Use the smaller controls between
these to fine tune your mid frequencies. All controls in this section can either boost or cut the signal at
their centre frequencies. In their centre position (12 o’clock) they have no effect i.e. the Eq is flat.
SHAPE SWITCH
This switch introduces a natural pre-shape to the sound of either channel 1 or channel 2, adding a bass
boost, a mid cut and a treble boost that suits both strumming and finger picking styles of playing.
NOTCH FREQUENCY
The Acoustic Radiator 2 has two separate Notch filters, one on each channel.These can be switched in and
adjusted to eliminate ‘body resonance’ feedback of the instrument at higher playing levels. Adjust the Notch
Frequency until the body resonance reduces, this will be the optimum position for the instrument.This
Notch has a fixed ‘Q’ that has been optimised for acoustic guitar.
REVERB
To make the sound more vibrant and alive Reverb can be added to either channel.This simulates the sound
of the instrument being played in various acoustic environments.The level of reverb to direct sound can be
adjusted using the Level control. Switches have been provided to select the reverb for channel 1, channel 2
or both.This feature is also foot switchable using any latching foot switch plugged into the Reverb Mute
rear panel jack socket.
EFFECTS TYPE
This allows you to select one of 16 digital effects to be added to channel 1 or channel 2. Available types
are: Hall 1, Hall 2, Room 1, Room 2, Room 3, Plate 1, Plate 2, Spring, Delay Short 1, Delay Short 2, Delay
Short 3, Delay Short 4, Delay Long 1, Delay Long 2, Delay Long 3, Delay Long 4.
OUTPUT
This sets the desired playing level / volume of the amplifier.
OUTPUT MUTE
This facility is also foot switchable. It will mute the output to the internal speakers as well as the D.I.
output.This will allow you to tune your instrument whilst the amplification is muted with a tuner plugged
into the Line Out socket, which is not muted during this operation.
Fro nt Panel Facilities
ACOUSTIC RADIATOR 1 & 2
OUTPUT
REVERB
NOTCH
LEVEL
FREQUENCY
EQ
TREBLE
BASS
INPUT
LEVEL
HALL / PLATE
LONG / SHORT
IN/OUT
ACTIVE / OUT
PHASE
SHAPE
IN/OUT
PASSIVE / IN
CHAN 2
CHAN 1
LOW Z
HIGH Z
PHANTOM
POWER
IN / OUT
CLIP
OUTPUT
REVERB
NOTCH
IN/OUT
IN/OUT
IN/OUT
1
1
SHAPE
IN/OUT
IN/OUT
IN/OUT
2
2
SHAPE
LEVEL
FREQ
LEVEL
FREQ
PUSH
OUTPUT
MUTE
EFFECTS TYPE
LEVEL
TREBLE
10KHz
MIDDLE
660Hz
BASS
100Hz
340Hz
1.6KHz
INPUT
LEVEL
INPUT
LEVEL
LEVEL
PHASE
PHASE
PHANTOM
POWER
CHANNEL
ONE
PIEZO
ACTIVE
CHANNEL
TWO
LOW Z
LOW Z
IN/OUT
IN/OUT
E.Q.
VU
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