BCS Steel Bridge User manual
Hello and Welcome to the elite group of musicians that own their very own Steel Bridge ™
guitar amplifier! We just wanted to stop and take a brief moment to say thank you for
purchasing one of these fine, handmade amplifiers.
Your purchase helps us proceed with paying employees and pursuing our overall goal of
making the loudest, best sounding tube guitar amplifiers on the market.
We generally build based on word of mouth only. None of us enjoy fake marketing language
that does not describe sound or convey feel of an amplifier. One must experience a Steel
Bridge ™ for oneself to truly understand why we don't advertise. If you like your amp, please
tell your friends. We can't do this without you.
WARNINGS AND DANGER!
“
This amp is capable of delivering sound pressure levels
that may cause permanent hearing damage
.” We build
the loudest amps in the world. Wear ear plugs.
Very high internal voltages present. DO NOT ATTEMPT TO
SERVICE. Refer to qualified service personnel only.
WE EXCLUSIVELY USE LEAD FREE SOLDER IN ALL OUR
AMPS. Please, when servicing our amplifiers, tell your
technician to use lead free solder.
Specifications:
●Two fully separate GAIN, EQ and MASTER VOLUME controls
●Completely custom preamp designed to enhance clarity and definition while retaining low
end
●20, 50, 100 or 200w power sections
●Featuring a 4x tube preamp using 3x ECC83 and 1x ECC81 (Optional Additional ECC83 for
loop)
●We generally use EL34 or KT88 tubes stock (JJ brand)
●Rear adjustable Drive and Depth controls
●Switchable output impedance for guitar (4, 8, 16 ohms) or bass (2, 4, 8 ohms)
●Fully fused power section (values depend on wattage)
●Anodized Black Aluminum front and back control panels with laser engraved control labels
●Laser engraved front faceplate with Steel Bridge ™ graphics
●Hand applied tolex with multiple optional color choices
●Hand drilled aluminum chassis with welded corners
●Stitched black leather handles
●User adjustable bias controls
●Fully filtered AC input for zero line noise
●10.5” high x 23.5” wide x 12” deep
User upgrade options include:
●Fully custom parallel effects loop with blend control
●Custom reverb option with selectable level control and tone switching
●Custom laser engraved faceplate option
●Direct output to mixing board
●Footswitch activated Boost control
●Choice of exotic color or stained headshell
●Active Mid shape/boost control
Front Panel Controls
Dirty channel:
Our typical dirty channel will most often feature a 3 band version of the popular “James” style
tone stack, sort of like the style found inside amps that are sometimes orange in color. The
difference is that we usually add a mid control so that you can further enhance the range of
operation of this particular tone stack. Our dirty channel does not typically have any clean
headroom. We’ve designed it to go from crunch to maximum fuzz. The tone stack really helps
to shape that level of signal into usable ranges for you to augment.
Ranges:
Bass: +/- 20db @ 50hz
Mid: +/- 15db @ 600hz - 800hz depending on model
Treble +/- 20db from 2-10k
(sweepable upgrade mid range)
Mid: +/- 25db
Mid Sweep: 300hz-2khz
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