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Shellharbour and Wollongong NSW, Australia
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Amp Three follows the concept of „amp one“ being small, rich and powerful based on a one way speaker-system. It also offers a superb mix between size and power and features for professional use.
Equipped with 2 x 8“ heavy duty bass-speakers, it enhances the low mids and offers a more open, transparent tone with the neccessary strength and focus to cut through.
single channel bass combo
200 watts, dynamic control
2 x 8“ heavy-duty bass-speakers
compressor with adjustable ratio and threshold
13,50 kg (29.50 lbs)
Inputs (notes 1, 4)
High-impedance instrument input
Mono jack, ¼” (6.35 mm)
Sensitivity: 21 mV (-34 dBV)
Impedance: 1 Megohm
Equivalent input noise:
1.4 V (–117 dBV), A-weighted
high / low switch: 10 dB attenuation
clip indicator: 8 dB headroom
aux in Stereo jack, ¼ “ (6.35 mm)
L + R mixed and added pre master, but
after tone controls.
Level control.
Sensitivity: 2 x 170 mV
Impedance: 22 k (each channel)
return Return for external, parallel effect loop
Mono jack socket, ¼” (6.35 mm)
Sensitivity: 360 mV
Impedance: 10 k
Outputs (note 2)
headphones Headphones output. When connected,
internal speaker is muted.
Stereo jack, ¼” (6.35 mm)
Output power: max. 100 mW into 32
Input sensitivity for 2 x 50 mW / 32
ohms: 25 mV at instrument input
For stereo headphones only. Connecting
mono plugs causes overload and may
damage the amp.
line out Preamp output, post master (note 6)
Mono jack, ¼” (6.35 mm)
Output voltage: 1.9 V (+6 dBV)
sub out Subwoofer output without filter
Mono jack, ¼” (6.35 mm)
Output voltage: 1.9 V (+6 dBV)
send Send for parallel effect loop
Mono jack, ¼” (6.35 mm)
Output voltage: 760 mV (–2 dBV)
tuner Tuner output, not affected by mute
Mono jack, ¼” (6.35 mm)
Output voltage: 800 mV (–2 dBV)
DI out Balanced XLR output, pre-master,
switchable pre or post tone controls /
effect / aux (note 6).
Output voltage (adjustable): 33…330
mV (–30 dBV … –10 dBV)
Insert points
insert pre eq Insert loop before tone controls
Stereo jack, ¼” (6.35 mm)
Output voltage: 800 mV (–2 dBV)
tip = send, ring = return
insert post eq Insert loop after tone controls
Stereo jack, ¼” (6.35 mm)
Output voltage: 760 mV (–2 dBV)
tip = send, ring = return
Footswitch connections
footswitch Stereo jack, ¼” for dual footswitch
tip = switch for input muting
ring = on/off switch for external effect
loop (send and return)
sleeve = common (ground)
mute switch disabled when footswitch
is plugged in
Tone controls
colour –1 dB at 360 Hz, +14 dB at 3.8 kHz
bass ±9 dB at 80 Hz
bass boost +10 dB at 55 Hz
middle ±15 dB at 200…2000 Hz (adjustable)
Bandwidth (switchable, note 3):
wide: 1.6 octaves
narrow: 0.6 octaves
treble ±12 dB at 6 kHz
tone balance Flat if intensity is set fully anticlockwise.
The following values apply if intensity is
set fully clockwise:
balance left:
+12 dB at 50 Hz
balance center:
+9 dB at 50 Hz, and
+10 dB at 10 kHz
balance right:
–2 dB at 50 Hz, and
+11 dB at 10 kHz
(shelf-type frequency response)
Compressor (note 5)
threshold range ≈ 0.25…78 mV (–72 dBV … –22 dBV) at
instrument input
ratio range 1:1…5:1
Time constant 40 ms
Indicator LED Lights up at ca. 1 dB gain reduction.
Power amp 200 W / 8 ohms, discrete bipolar
transistor output. Dynamic range, Aweighted:
102 dB (note 4)
Limiter threshold 160 W
Analog signal
Subsonic filter, low distortion RMS
Speaker system 2 x 8" (200 mm) woofer, bass reflex
Mains power Mains voltage (depending on model):
100, 120, 230, or 240 V AC, 50–60 Hz
Power consumption: max. 500 W
Mains fuse 5 x 20 mm
slow 3.15 A for 230 and 240 V models
slow 6.3 A for 100 and 120 V models
Cabinet 15 mm (0.59") birch plywood
Finish waterbased acrylic, black spatter finish
Dimensions 365 mm (14.37“) high
420 mm (16.54“) wide
300 mm (11.81“) deep
Weight 16 kg (35.3 lbs)
1. Input sensitivities refer to 160 watts into 8 ohms at full gain and
volume settings, neutral tone control settings (intensity fully
anticlockwise), and 1 kHz sine-wave test signal.
2. Output levels refer to –25dBV (56.2 mV) / 1 kHz at instrument
input, unless stated otherwise.
Earlier models have a DI out adjustable down to zero.
3. Bandwidth of tone controls refers to one-half of gain at center
frequency, in decibels. For example, if a tone control has 15 dB
center gain, then bandwidth refers to the 7.5 dB points.
4. Equivalent input noise voltage obtained by measuring noise
voltage at speaker output and dividing by the voltage gain of the
amplifier for white noise. Full gain and volume settings, neutral
tone control settings, input shorted, frequency range 20 Hz – 20
Dynamic range of power amplifier is defined as ratio of output
voltage at limiter threshold to A-weighted noise voltage at master
volume in zero position.
5. Compressor threshold refers to 1 dB gain reduction and input gain
fully clockwise, ratio refers to 20 dB gain reduction. Ratio varies with
gain reduction due to soft-knee compression.
6. If required, aux in and return signals can be disconnected from DI
out by an internal jumper even in the post switch position.
line out can be made master-independent by an internal jumper.
Specifications and appearance subject to change without notice. 

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