ABH200C & ABH300H Features and Controls
INPUT –
Mono
¼
” Jack socket for instrument input. Use a
properly screened “guitar” cable for interconnection. There
are many different makes of guitar cable available, ranging
from fairly inexpensive to very expensive. Each have
different characteristics, and depending on your particular
guitar will give different results, so experimentation and
help from your dealer is the best advice we can give.
-10dB INPUT PAD –
normally the input jack connects
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position, and is suitable for most purposes. However,
in the case of high output active guitars and preamps,
the signal level may be too high for the input stage to
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impedance to a more suitable value for active guitars
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INPUT GAIN BOOST –
on the other hand, the input
stage may not be “hot” enough for your liking and you
want to use the valve preamp’s natural overdrive tone –
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conjunction with the rotary GAIN control.
TUNER MUTE –
by pressing this switch the output of
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on the back panel, thus allowing for silent tuning. The
mute switch function is also available via a footswitch
jack mounted on the back panel (optional footswitch is
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GAIN –
this control determines the amount of signal that
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are clean – high mid settings are in the start of distortion
range – and high settings are in the overdrive range.
EQUALISATION STAGE
EQ CONTOUR EXPANSION SWITCHES –
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and very versatile in its own right, but the use of the four
expansion pushswitches opens up even more possibilities.
LOW CUT –
when pushed in, this switch activates a high
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the preamp circuit which is used to tighten up the sound
when the preamp is required to be pushed into “overdrive”
for heavy rock playing styles. This helps the sound to
retain punch and drive without being swamped by the very
low frequencies which can become “muddy”.
LOW BOOST –
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frequencies in a very warm and musical way.
HIGH BOOST –
as its name implies this switch boosts
the high frequencies adding great “presence” and “cut”
required for modern bass playing styles. It adds “snap”
without adding harshness.
EQ DEPTH –
working in conjunction with the Treble
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capabilities.
BASS & TREBLE EQ ROTARY CONTROLS &
RANGE SWITCHES –
although the Treble and bass
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are fitted with a 3-position rotary RANGE switch which
selects differing component values for different frequency
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guitar. Experimenting with these controls is advised.
MIDDLE EQ ROTARY & RANGE SWITCH –
as
stated earlier the Middle circuit is after the valve preamp,
and again is of the cut and boost variety. The Range
switch varies the Mid centre frequency between 400Hz,
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SERIES EFFECTS LOOP
LEVEL
RETURN
SEND
BYPASS
LOOP
ROUTE
LOW
HIGH
LOUDSPEAKER OUTPUT SOCKETS
PARALLEL CONNECTED SOCKETS - INTERNAL LOUDSPEAKER = 16ohms
WARNING! DO NOT USE WITHOUT CONNECTING
LOUDSPEAKER LOAD TO AMPLIFIER AND MATCHING
OUTPUT IMPEDANCE TO SPEAKER IMPEDANCE.
16ohm OUT = 1 x 16ohm LS, 8ohm OUT = 1 x 8ohm OR 2 x 16ohm LS
OUTPUT = 35 Watts RMS into 8 or 16 ohms
DO NOT CONNECT ANY UNBALANCED GROUND CONNECTED EQUIPMENT
TO THE OUTPUT OF THIS AMPLIFIER. USE UN-GROUNDED DIFFERENTIAL
MODE ONLY. IF IN DOUBT REFER TO USER MANUAL
35 WATT TWIN CHANNEL VALVE GUITAR AMPLIFIER
FOOTSWITCH
CONNECTOR
8ohm
16ohm
HT FUSE
MAINS INPUT
T315mAL 250V
T1.6AL 250V
WARNING! USE CORRECT FUSE ONLY
POWER
MUTE
100%
PHASE
+
ACTIVE
33%
PHASE
-
MAINS
ON
POWER OUTPUT
MASTER
REVERB
OUTPUT
MIX
F'BK
POWER AMP RESPONSE
DEEP
EDGE
MIX LOWER
1
2
3
4
6
7
8
9
MIX HIGHER
0
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2
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6
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9
10
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10
VOLUME
TREBLE
MIDDLE
BASS
DRIVE
GAIN
TIGHT
SMOOTH
SHIFT
TIGHT
LOOSE
INPUT
CHANNEL A - PRE EQ
CHANNEL B - POST EQ
A-B
MIX
PRESS BOTH
FOR REMOTE
OPERATION
0
1
2
3
4
5
6
7
8
9
10
5
5
A-B/MIX
BALANCE
SERIES EFFECTS LOOP
LEVEL
RETURN
SEND
BYPASS
LOOP
ROUTE
LOW
HIGH
LOUDSPEAKER OUTPUT SOCKETS
PARALLEL CONNECTED SOCKETS
WARNING! DO NOT USE WITHOUT CONNECTING
LOUDSPEAKER LOAD TO AMPLIFIER AND MATCHING
OUTPUT IMPEDANCE TO SPEAKER IMPEDANCE.
16ohm OUT = 1 x 16ohm LS, 8ohm OUT = 1 x 8ohm OR 2 x 16ohm LS
OUTPUT = 100 Watts RMS into 8 or 16 ohms
DO NOT CONNECT ANY UNBALANCED GROUND CONNECTED EQUIPMENT
TO THE OUTPUT OF THIS AMPLIFIER. USE UN-GROUNDED DIFFERENTIAL
MODE ONLY. IF IN DOUBT REFER TO USER MANUAL
100 WATT TWIN CHANNEL VALVE GUITAR AMPLIFIER
FOOTSWITCH
CONNECTOR
OUTPUT BIAS ADJUST SYSTEM
WARNING! DO NOT REMOVE COVER
8ohm
16ohm
HT FUSE
MAINS INPUT
T1AL 250V
T2.5AL 250V
WARNING! USE CORRECT FUSE ONLY
CAUTION! NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED TECHNICIAN
SERIES EFFECTS LOOP
LEVEL
RETURN
SEND
BYPASS
LOOP
ROUTE
LOW
HIGH
LOUDSPEAKER OUTPUT SOCKETS
PARALLEL CONNECTED SOCKETS
WARNING! DO NOT USE WITHOUT CONNECTING
LOUDSPEAKER LOAD TO AMPLIFIER
OUTPUT = 200 Watts RMS into 8ohms - 300 Watts RMS into 4ohms
DO NOT CONNECT ANY UNBALANCED GROUND CONNECTED EQUIPMENT
TO THE OUTPUT OF THIS AMPLIFIER. USE UN-GROUNDED DIFFERENTIAL
MODE ONLY. IF IN DOUBT REFER TO USER MANUAL
MAINS INPUT T3.15AL 250V
WARNING! USE CORRECT FUSE ONLY
TUNER
FOOTSWITCH
MUTE
OUT
LINE OUT
GROUND
CONNECT
ISOLATE
300Watt TUBE PRE/BIPOLAR POWER BASS AMPLFIER
WARNING! DO NOT USE LOAD OF LESS THAN 4ohm IMPEDANCE
series
4
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ABH300H.indd 8
2011-5-5 18:34:19
