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JIMS 800 PREAMP
Introduction
Congratulations on your purchase of the JIMS 800 PREAMP pedal. In this unit you will find a true-to-life
digital simulation of a Marshall JMP 2203* (JCM 800*) tube amplifier, created using TC Electronics unique
AMPWORX modeling technology. Every detail of the original tube amp has been lovingly re-created in
painstaking detail by the TC tone technicians, right down to every last component in the circuit. Bringing you
the best digital amp modeling experience available.
*Marshall JMP 2203 and JCM 800 are trademarks or registered trademarks of Marshall Amplification PLC.
Celestion CAB SIM
To provide you with a DI-ready pedalboard setup solution for connection to PA systems, recording interfaces
and headphones, we've partnered up with the best in the business and supplied you with an official
Celestion Digital impulse response of a 4 x 12 G12-65 loaded cabinet, so it's ready to roll right out of the
box via dedicated DI and Headphone outputs.
Custom MODS
What would a beautiful vintage tube amp be without a couple of hand-crafted boutique mods?
In that spirit, we've added some highly sought after custom shop modifications based on mods by
legendary amp builders.
• TREBLE BLEED MOD – The treble bleed across the gain control has been reduced but not removed
completely. This results in sweeter high-mids and a less shrill top end bite than a stock JCM 800*,
but without loosing the amplifiers trademark characteristics.
• CUSTOM TONESTACK – The stock JCM 800* amplifier inherited its tonestack from classic plexi and
PA-style tube amplifiers. For the BASS, MID and TREBLE knobs, the center frequency of these controls have
been slightly tweaked resulting in a more versatile range of adjustment and more 'dialed in' sounding
amp tone.
• GAIN MOD – We added a touch more level to the 2nd gain stage, resulting in slightly more gain and
compression. This reduces the stiffness of the amp and gives a more effortless feeling under the fingers.
Controls
NOTE: All controls on the back panel of the pedal
are global and not saved per channel. Intended to
"set and forget". **
NOTE: All controls values on the top panel of
the pedal and the BOOST footswitch status, are
independent per channel and save their settings
automatically when you switch between channels.
Quick Start Guide
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1. IN – Connect your instrument to this
jack by using an instrument cable with
a ¼" TS connector.
2. OUT – Outputs the amplifier model without
speaker cab sim. Connect to dedicated power
amplifier, amp FX RETURN, amplifier input or
external IR (Impulse Response) loader.
3. DI (CAB SIM) – Outputs the amplifier model,
combined with official Celestion Impulse
Response speaker cabinet for direct input to
audio interface, FRFR (full range) cabinet or
PA system.
4. PRESENCE – This control globally sets the
presence for both channels.
The PRESENCE 'set it and forget' knob allows
you to adjust the overall brightness of your
sound to suit your setup and outboard gear.
5. BOOST (PRE/POST) – This switch controls
whether the boost is applied before the amp
(PRE) for more distortion or after the amp
(POST) for a volume boost.
6. DC IN – Connect to a standard 9 VDC /
300 mA power supply with center pin
negative connector.
7. USB – Connect to a computer using the
included mini-USB cable for firmware updates.
8. PHONES – Connect headphones with a 1/8"
(3.5 mm) stereo jack. Includes AMP MODEL
with CAB SIM.
9. GAIN – Sets the input gain.
10. BOOST – Sets the amount of gain provided
by the boost.
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