Reducer
Model 1160
Quick Guide
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Output
Reduction
Switch
Reduction
Control
Impedance
Switch
Specs
Passive Power Soak For Guitar & Bass Amplifiers • Point To Point Handwired
© 2011 SPL electronics GmbH. All rights reserved.
At the OUTPUT the amp signal appears as reduced with the front panel controls. It allows for the connection of a
4, 8 or 16 ohm cabinet. Reduction starts at 0 dB (unity gain) followed by two -3 dB and -5 dB switch settings. The
variable values range from -7 dB to infinite. With this “volume control” between amp and cab, the guitar amp can
be driven into saturation also at moderate listening levels.
Connector variant and connections follow industry standards: Unbalanced 1/4" jack connector with the signal
at the tip and ground at the sleeve.
As with any typical amp and cabinet cabling, it is critical to observe loud-
speaker cable of a minimum 1.5mm2 cross section. Instrument or line cables can lead to amplifier damage!
We
recommend to use cables with a maximum length of 3 meters/10 feet for lossless signal transmission.
With the REDUCTION SWITCH on the left side of the front panel you select the first reduc-
tion values: 0 dB (unity gain), -3 dB, and -5 dB. Selecting the VARIABLE switch position
activates the central REDUCTION CONTROL for further, continuous reduction ranging
from -7 dB to infinite (mute).
The central REDUCTION CONTROL is only active when the REDUCTION SWITCH is set to
VARIABLE.
Set fully left mutes the signal, turned fully right results in a power reduction
of -7 dB. A 7 dB reduction can be compared approximately to the volume that results
from a “half power“ setting at guitar amps; usually this is still pretty loud in many situ-
ations.
With the IMPEDANCE SWITCH to the right you select the required impedance for your
amplifier. Check the impedance of your amplifier at its speaker output.
IMPORTANT: Just as with any cabinet connection, selecting an impedance lower than
needed can destroy the amplifier. Therefore, double check selection of the appropriate
impedance before use.
Never reduce impedance while playing!
Selecting a higher impedance than necessary does not harm any device. Whenever you
may be in doubt about the required impedance for an amp, select the highest impedance
(16 ohms) – you may lose power, bot not your amp.
Input
Socket: 1/4" TS (Mono Jack)
Impedance
4, 8, or 16 Ohms switchable
Max. input load
@4 Ohms: 90 W RMS/120 W Peak
@8 Ohms: 200 W RMS/260 W Peak
@16 Ohms: 160 W RMS/180 W Peak
Output
Socket: 1/4" TS (Mono Jack)
Dimensions
Height 68 mm, 85 mm with feet
Depth 190 mm, 208 mm with controls and sockets
Width 179 mm
Weight
1,8 kg/3.97 lbs
The construction of the REDUCER, Model 1160, is in compliance with the standards and
regulations of the European Cummunity.
Further information: spl.info
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Control Elements
