Ashdown 427 SMALL BLOCK Руководство пользователя - Страница 4
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VALVE BASS AMPS
USER MANUAL
427 SMALL BLOCK HEAD
FRONT PANEL
REAR PANEL
FRONT PANEL FACILITIES
INPUTS - There are two instrument inputs marked LOW and HIGH. The LOW
input is high sensitivity and also high impedance to suit the output from
PASSIVE (Low Output) basses. The HIGH input is low sensitivity and lower
impedance to suit the output from ACTIVE (High Output) basses. Plugging an
active (High Output) bass into the LOW input will overload the input, creating
a fatter, warmer and more distorted sound. Experiment by plugging your bass
into either input to achieve the desired sound.
EFFECTS SEND AND RETURN - These 1/4" jack sockets should be used to
connect to an external effects device or pedal board. The EFFECTS SEND
output should connect to the INPUT of the effects unit, and the output of the
effects unit should be connected to the EFFECTS RETURN input.
EQ CONTROLS - Use the MIDDLE, BASS and TREBLE controls to effect the
overall tone of the sound. The MID SHIFT switch causes the MIDDLE control
to operate on higher frequencies in the up position, and lower frequencies in
the down position. The BASS SHIFT switch causes the BASS control to
operate on deeper frequencies in the up position, and less deep frequencies
in the down position. The BRIGHT switch adds an overall brightness to the
sound when in the up position. (Note: The BRIGHT switch is not effective
when the GAIN control is set to full).
GAIN - This controls the level of the signal sent to the MASTER section. To
achieve a cleaner sound, turn the GAIN control down and the MASTER up. To
achieve a richer, more distorted sound, turn the GAIN control up and the
MASTER down.
MASTER - This controls the overall output of the amplifier.
427 SMALL BLOCK • 550 SPYDER • 550 TOURING • BTA 200/300/400 • LITTLE BASTARD
MUTE - In the up position, this switch mutes the out put of the amplifier
(useful for tuning, etc.).
PRE/POST - This switch determines whether the signal from the DI OUTPUT
(see Rear Panel Facilities) is taken before/PRE the EQ section (down position)
or after/POST (up position).
VU METER - The VU meter provides a visual indication of the output level of
the amplifier.
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.
LINE INPUT - This 1/4" jack socket is used to connect the output of line level
devices such as samplers and sound modules.
SPEAKER OUTPUTS - There are dedicated Speakon connectors for 2, 4 and
8Ω 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.
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.