Ashdown BTA 400 Manuale d'uso - Pagina 4
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CTM-30
REAR PANEL FACILITIES
DI OUTPUT
This 1/4" stereo jack socket is used to connect the amplifier to a low impedance, balanced input on a PA system
or recording mixer. The signal can be taken PRE or POST EQ (see above), ie with or without the tone shaping
added by the EQ section of the amplifier.
On the CTm30 the DI is derived directly from the output transformer and therefore is an exact copy of the sound
that you here.
SPEAKER OUTPUTS
There are dedicated Speakon connectors for 2, 4 and 8! load speaker cabinet configurations. It is important
that the correct output or outputs are used to match the impedance load of your cabinets. Please refer to the
diagrams later in this manual.
CTm 30,and 15 are fitted with jack outlets at 8 and 4 ohms.
OFF/PREHEAT
Use this switch to pre-heat the valves, bringing them up to the correct operating temperature before
performing.
STANDBy/FULL
No signal is sent to the speakers when this switch is in the STANDBy position. Switch to FULL when you are ready
to perform.
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6
USER MANUAL
VALVE
CTM-15
Tech Spec:
CTm 300,100 AND DH200
POWER OUTPUTS
CTm 300-- 300WATTS FROm 6 XKT88
DH200 --150 WATTS FROm 4 X 6550
CTm100-- 100WATTS FROm 2 X KT88
ALL AmPLIFIERS FEATURE USER ADJUSTABLE BIASINg AND 2.4 8 OHm
OUTPUTS ON SPEAKON COmBI OUTLETS.
PRE AmPLIFIER ( all models ) 2 x ECC832 AND 2 X ECC82 + 1 X ECC99 (
CTm300)
CONTROLS Totally Passive tone shaping via Bass ,middle Treble controls +
SHIFT controls for Bass, middle controls, Bright and mellow switches.
gain and master controls for clean and distorted tones
vU mETER Dual Function for indication of output power and tube balance
and biasing
EFFECTS LOOP valve driven and recovered
DI out valve driven transformer coupled isolated ground with PRE/POST
EQ switching.
CTm30, LB30 DH 30
OUTPUT POWER 30 WATTS FROm 4 X EL84
AUTOmATIC BIAS FOR PLUg AND PLAy EASy vALvE REPLACEmENT.
4 AND 8 Ohms outputs on ¼" jack sockets
DI OUT Transformer derived sampled from output to include tube
distortion ( isolated ground)
PRE AmPLIFIER ( all models ) 2 x ECC83 AND 1X ECC82
CONTROLS Totally Passive tone shaping via Bass ,middle Treble controls +
SHIFT controls for Bass, middle controls, Bright switch
volume control for clean and distorted tones
vU mETER For indication of output power
EFFECTS LOOP valve driven and recovered
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CTm15, DH 15
OUTPUT POWER 15 watts from 2 X EL84
AUTOmATIC BIAS FOR PLUg AND PLAy EASy vALvE REPLACEmENT.
4 AND 8 Ohms outputs on ¼" jack sockets
PRE AmPLIFIER ( all models ) 1 x ECC83
CONTROLS Totally Passive tone shaping via Bass ,middle Treble
gain and master controls for clean and distorted tones
vU mETER for indication of output power
Cool industrial wrinkle finish steel case with built in handle
Head supplied with gIg bag
DH15 combo also features a custom designed DUAL concentric "WHIZZER"
cone speaker rated at an incredible 250 watts and a cool flip top design.
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