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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

Page 1: ...OPERATING MANUAL AND USER GUIDE www albionamps com ...

Page 2: ......

Page 3: ...Contents Important Safety Instructions 1 Important Warnings 2 Designer s Introduction 3 2XWOLQH 6SHFL FDWLRQ 3 ABH120C Combo and ABH180H Head Features and Controls 4 BLS1215 BASS CABINET 6 ...

Page 4: ...ents accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or WDEOH VSHFL HG E WKH PDQXIDFWXUHU RU VROG ZLWK WKH apparatus When a cart or rack is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug the apparatus during lightning storms or when unused for long periods of time 5HIHU DOO VHUYLFLQJ WR TXDOL HG SHUVRQQHO...

Page 5: ...m your amplifier It is there to prevent you from receiving a fatal electric shock NEVER use your amplifier equipment in a high PRLVWXUH HQYLURQPHQW VXFK DV UDLQ RU DOORZ LW WR JHW wet ALWAYS use correct and well maintained cables for all inter connections whether for power speaker or signal connections If in any doubt get them checked or renew immediately 1 9 5 XVH RXU DPSOL HU SURGXFWV ZLWK DQ FR...

Page 6: ...vel 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 EDVV SURGXFW ZLWK HDVH DQG ZLWKRXW DQ XOWUD KDUVK unpleasantness it really delivers the goods with what we WKLQN LV D SUHWW VXSHUE VRXQG OHYHO 63 IRU DQG watt bass rigs As with the other power items the power...

Page 7: ...ON SWITCHES WKH 4 system of the ABH bass system is very wide ranging and very versatile in its own right but the use of the four expansion pushswitches opens up even more possibilities EQUALISATION STAGE LOW BOOST conversely the Low Boost switch UHFRQ JXUHV WKH LQSXW VWDJH FLUFXLW WR ERRVW WKH YHU ORZ frequencies in a very warm and musical way HIGH BOOST as its name implies this switch boosts the ...

Page 8: ...ins fuse blowing this can be changed E UHPRYLQJ WKH SRZHU FRUG FRQQHFWRU IURP WKH DPSOL HU receptacle and with the aid of a small screwdriver the small drawer in the receptacle can be withdrawn allowing access to the mains power Fuse Rear Panel ABH180H shown 6SHFL FDWLRQ ABH180H ZDWW HDG DVV PSOL HU 120 watts RMS output into 8 ohm impedance loudspeaker load 180 watts RMS output into 4 ohm impedanc...

Page 9: ...ss fuse 0DLQV XVH 9 VXSSO 7 WLPH ODJ 250V rated 20mm glass fuse 6L HV LPHQVLRQ LQFO IHHW PD LPXP HLJKW J Warning Where fuses specified are rated at 250V please be aware that this is the rating of fuse value and NOT the rating of your particular DPSOL HU Warning Where fuses specified are rated at 250V please be aware that this is the rating of fuse value and NOT the rating of your particular DPSOL ...

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Page 12: ...gn Court Ermine Business Park Huntingdon Cambs PE29 6XU England www albionamps com The information in this brochure is subject to change without notice All rights reserved 2010 Albion Albion is a member of the IAG Group ...

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