Laney BC Series User manual

Laney
BC SERIES
BASS
AMPLIFICATION
USER MANUAL
MARCH 1994
MODELS
BC30
BC50
BC5015
BC75
BC120

Laney
INTRODUCTION
Congratulations on your decision to purchase a laney amplifier.
Laney products are designed with ease of operation as a primary objective, however to ensure you
derive the best from your new amplifier, it is important you take some time to read this user
manual and to firstly familiarise yourself with the control functions and facilities available.
BEFORE
SWITCHING ON
After unpacking your amplifier check that it is factory fitted with a three pin 'grounded' (or earthed) plug.
Before plugging into the power supply ensure you are connecting to a grounded (earthed) outlet.
If you should wish to change the factory fitted plug yourself, ensure that the wiring convention applicable
to the country where the amplifier is to be used is sfrictlv conformed to. As an example in the United
Kingdom the cable colour code for connections are as follows.
EARTH OR GROUND - GREEN/YELLOW
NEUTRAL - BLUE
LIVE - BROWN
GENERAL
INFORMATION
Amplifiers should never be exposed to moisture or wetness under any circumstances since this would
present a possible shock or fire hazard, and may cause possible damage to your new and valuable
aquasition.
In the unlikely event that a fuse should blow it is imperative that you or your engineer, use a correctly
rated replacement.
Details of the fuse required is printed on the rear panel of your amplifier or on the chassis adjacent to the
failed fuse.
USING THIS
MANUAL
This manual has been written for easy access of information. The front and rear panels of each unit
are graphically illustrated, with each control or facility numbered. For a description of the function of
each control or facility simple check each number with the glossary of terms given later in the
manual.
MODEL: BC30
PREAMPLIFIER
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MODEL: BC30 (Confd)
REAR PANEL
MODEL: BC50
PREAMPLIFIER
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CAIN
■ I NPUT-
BASS MIMEP MIDGAIN TREBLE
BRIGHT
□
EQUALIZATION
VOLUME POWER
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— MASTER-
REAR PANEL (NOT USA}
REAR PANEL (USA ONLY)
MODEL BC75
PREAMPLIFIER
ACTIVE PASSIVE
GAIN
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BASS
BRIGHT
□
TREBLE
mmm ■
VOLUME
■ W Si-
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REAR PANEL (NOT USA)

MODEL BC75 (Confd)
REAR PANEL (USA ONLY)
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P P 0
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MODEL BC120
PREAMPLIFIER
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REAR PANEL [NOT USA)
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REAR PANEL (USA ONLY)
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Explanation of Terms
BC Series Amplifiers
PREAMPLIFIER CONTROLS
0
INPUT
Input jack for instrument.
0
ACTIVE
Input jack for active or high output instruments such as those with built in
preamplifiers..
0
PASSIVE
Input jack for most passive instruments, lie those without built in preamplifier}
O
GAIN
Sets the overall gain of the amplifier to suit the instrument being used, set as high as
possible without distortion, then adjust the volume to suit. May need resetting after
EQ changes.
0
BASS Sets the bass frequency response.
0
MIDDLE
5ets the middle frequency response.
0
TREBLE
Sets the high frequency response.
0
MIDSWEEP
Sweeps the middle frequencies, for LO mid move anticlockwise and for HI mid
clockwise, (use with 9)
o
MIDGAIN
Sets the gain of the middle frequencies, for mid cut move anticlockwise and for mid
boost clockwise.
0
GRAPHIC EQ
Six band graphic equaliser, use to set the middle frequencies. For best sounds set
sliders to gradual curves and avoid extremes.
0
COMPRESSOR
Compresses the input signal, giving a punchier sound. Use in conjunction with gain
control 4.
0
HI
Boosts the high frequencies.
0
LO
Boosts the extreme low frequencies, especially useful on 5 string bass guitars.
0
BRIGHT
Adds brightness to the EQ.
0
VOLUME
Sets the overall listening level of the amplifier.
0
LED
indicates power on.
0
DIRECT INJECT
Stereo 1/4" Jack socket for direct injection of the amplifier signal to a mixing desk or
power amplifier. This provides a low impedance output signal. (Balanced output,
sleeve: ground, tip: hot, ring: cold.
0
DIRECT INJECT
XLR socket for direct injection of the amplifier signal to a mixing desk or power
amplifier. This provides a low impedance output signal. (balanced output, pin 1:
ground, pin 2: hot, pin 3: cold ).
REAR PANEL
0
SUPPLY
Mains/power lead with factory fitted plug.
0
FUSE
Mains/power fuse. Replace only with correct type and rating.
0
POWER
Mains/power on/off switch.

Explanation of Terms
BC Series Amplifiers
REAR PANEL (Confd) -
0 HEADPHONES
Headphone output for silent listening, ie practice or tuning up. For models: BC30 and
BC50 simply piug in the headphones and the on board speakers will be automatically
disconnected. For all other models you must physically unplug the speaker jack. NB:
remember to reconnect the speaker after headphone use.
0 SPEAKER
Speaker output. This May be disconnected if it is required to connect a larger enclosure.
NB: Minimum load impedance 4 ohm.
0 RETURN
Effects return, accepts Ihe output of an external effects processor. (signal level nominal
-6dB)
0 SEND
Effects send, sends the preamplifier signal to an external effects processor if required, (
signal level nominal -6dB)
0 MAINS
0 DI/UNE
Mains/power input socket.
Direct injection or line level 1/4" mono jack socket. This provides a tow impedance output
signal for connecting to a mixing desk or power amplifier for further sound reinforcement.
0 MAINS
Mains/power input socket with combination fuse carrier. When replacing the fuse, ensure
that the replacement is of a similar value. The correct fuse value is marked adjacent to the
carrier.