OPERATING MANUAL AND USER GUIDE
3
ABH120C ABH180H & BLS1215
Designer's Introduction
The
ABH120C
and
ABH180H
bass combo and head are
part of the
Albion
ABH
bass range. The design follows
on from their bigger brothers (
ABH200C
and
ABH300H
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same heavy duty, very musical, BJT power amp topology.
As with all our bass products these amps are heavily
engineered for great sound at all times and conditions and
provide a very solid and tuneful bass tone that go beyond
their lower power ratings.
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playing needs.
Thank you
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The
ABH120C
combo and
ABH180H
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utilizes a combination of technologies to provide optimum
performance required for high class consistent playing
night after night. Both amplifiers use the same circuitry,
only differing in the power supply transformer values to
provide the required power output.
The main preamplifier and tone forming circuit section
uses 1 double triode low noise 7025/12AX7/ECC83 valves
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from a 380 volt HT power supply and DC heaters. The
output from the valve preamp circuit then passes through
the sweep-able semi-parametric Mid circuit, which is
separate from the preamp.
The power amplifier stage is an extremely rugged but
very musical bipolar transistor design that delivers the
wide range response required for the punch and wide
bandwidth required by today’s bass players. The power
stage is pretty much OVER-engineered to maintain
night after night of high level bass guitar playing without
compromise. As mentioned above, the power stage is
very musical, it has a very sweet tone and handles being
pushed into distortion (which is a very big test on any
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unpleasantness – it really delivers the goods with what we
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watt bass rigs.. As with the other power items the power
transformer is also larger than what other manufacturers
put in their comparative bass amps. Why? Because it
helps deliver the lowest notes without batting an eyelid! It
doesn’t run out of steam!! And also helps keep things very
cool (except for the preamp valves of course!
The
ABH120C
and
ABH180H
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array of controllable options that make for a very versatile
bass system, covering gain variations for both active and
passive guitars, plus some very neat tone contouring
options that are both simple to operate yet provide a wide
range of bass tones.
There is also a built-in “DI” system that allows the amp to
feed a recording and other sound system. This DI output
runs in balanced XLR mode but can be externally wired
to suit an unbalanced system. It has its own Level control
and can be switched to pre/post signal connection and
can be ground lifted to reduce any “hum” problems
The signal handling capabilities of
ABH
bass amps puts
you in control of the dynamics that you want - be it from
clean, warm Jazz, through to overloaded Rock bass
styles. Our bass amps and speaker systems are designed
to deliver and handle them all.
The
ABH120C
combo comes complete with one of our
own custom designed and built Albion 12” bass guitar
loudspeakers wired for 8ohm operation. This speaker
has been specially designed for this combo, enabling it to
deliver great low end from a small cabinet.
ABH120C ABH180H & BLS1215 User m3 3
2011-4-21 17:32:09
Summary of Contents for ABH120C
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