Mesa/Boogie Bass 400 Plus Operating Instructions
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Also See for Bass 400 Plus:
- Owner's manual (54 pages) ,
- Operating instructions manual (24 pages) ,
- Owner operating instructions (11 pages)
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MESA/BOOGIE
BASS 400 PLUS
OPERATING INSTRUCTIONS
CONGRATULATIONS! You've just become the proud owner of the world's finest bass
amplifier. When people come up to compliment you on your tone, you can smile
knowingly... and hopefully you'll tell them a little about us! This amplifier has been
designed, refined, constructed and tested to deliver maximum musical performance of any
style, in any situation. And it is very easy to operate.
INTEGRATED SYSTEM
The idea behind this amplifier is to assemble all the elements of a custom rack system
into one perfectly matched unit. Your Bass 400 Plus includes two separate (and slightly
different) bass preamps, plus a versatile tone control network, an adjustable Effects Loop,
a seven-band Graphic Equalizer, and special driver and buffer circuits feeding a highly
dynamic, twelve-tube power amplifier. All were created especially for bass.
WHY VACUUM TUBES?
Most musicians know that tube amps are unbeatable for guitar... but what about bass?
Isn't it better to have a big, clean, high-power transistor amplifier? We don't think so. And
our proof is that your Bass 400 Plus will offer superior tone and more usable power than
solid-state systems costing two to three times as much! In our years of research we have
made some surprising discoveries: the best sounding power amplifier for bass is quite
different than the one we use for guitar. And is very different than the best power designs
for keyboard or stereo fidelity. Transistor systems are designed primarily for "laboratory
conditions", not the real world of live music. Your Bass 400 Plus will demonstrate the big
difference: you'll hear knockout punch (without the farting attack) and clear, distinct pitch
(without boominess or mud).
CHANNEL ONE
Input 1 and Volume 1 offer a high-headroom preamp that you might find preferable for
active type basses. The gain is slightly lower than Channel 2 and the tonal personality is
slightly different. The Pull Bright switch built into Volume 1 can be great for funk bass, as it
accentuates the harmonics above the Treble control region.
MESA/BOOGIE
The Spirit of Art in Technology
- 1 -
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Summary of Contents for Mesa/Boogie Bass 400 Plus
- Page 1 MESA/BOOGIE MESA/BOOGIE BASS 400 PLUS The Spirit of Art in Technology OPERATING INSTRUCTIONS CONGRATULATIONS! You've just become the proud owner of the world's finest bass amplifier. When people come up to compliment you on your tone, you can smile knowingly... and hopefully you'll tell them a little about us! This amplifier has been designed, refined, constructed and tested to deliver maximum musical performance of any style, in any situation.
- Page 2 CHANNEL TWO Input 2 and Volume 2 recreate the classic sounds of the D-180, predecessor to your Bass 400. The gain is slightly higher and may be better suited for traditional basses than Channel One. But be certain to sample both channels because their tonal personalities are both very usable with very interesting differences.
- Page 3 The Effects Return jack can also be used to plug directly into the 400's power section. The Master can regulate sensitivity, and the Graphic EQ will be functional. If you wish to use only the preamp section of your Bass 400, you can use the Effects Send jack as a preamp output;...
- Page 4 (you'll notice how cool they run). You can expect about two years of outstanding performance from the tubes; when replacements are needed, be sure to use only genuine MESA 5881's (available from MESA/Boogie Pro Centers and Tube Dealers, and from MESA/Boogie directly). The use of other tube brands will invalidate your Bass 400 Plus warranty! Amplifier bias has been permanently set at the factory and should never need adjustment.
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