Gallien-krueger 2000RB User Manual
Operating
Instructions
2000RB
Table of Contents
INTRODUCTION ………………………………………………………. 3
2000RB FEATURES ……………………………………………………. 3
FRONT PANEL FEATURES …………………………………………… 4
REAR PANEL FEATURES …………………………………………… 5
SELECTING AN OPERATING MODE &
HOOKING-UP YOUR SPEAKERS …………………………………… 6
GETTING YOUR SOUND ……………………………………………. 7
USING EFFECTS ……………………………………………………… 8
MEASURED SPECIFICATIONS ……………………………………… 10
TROUBLESHOOTING …………………………………………………… 11
2
We are very proud of the 2000RB, G-K's most powerful bass amplifier to date, and in many ways, the
culmination of 27 years in the amplification business. The 2000RB was designed with you in mind to be your personal creative tool, to give you the
ultimate bass response and tone. We've learned
many things by talking to bass players like you for
almost three decades. We know you want lots of
headroom and raw power, yet you want your amp to
be dead quiet and free of noise. You need fast
response and clarity. And perhaps most of all, you
want all that great performance night after night, year
after year, from and amp that will never let you
down.
The 2000RB is definitely not just another high power
bass amp. Its High Current Capacity output stages capable of delivering instantaneous power of 10,000
watts - are revolutionary. Its relay-activated Fault
Detection Circuitry is state - of - the - art. All the
design parameters for the 2000RB are optimized for
response, headroom, and reliability.
Like all G-K bass amps, the 2000RB is user friendly .
It's easy to get the sound you're looking for - in fact,
it's hard to get a bad sound. We took all the same
responsive bass tone G-K amps are known for, and
made it even better. We think you will be very
pleased with your new 2000RB. We are.
Bob Gallien & Rich Krueger
Introduction
Power : 500 watts RMS per channel into 2 ohms in
Stereo or Bi-amp Mode, 1000 watts RMS into 4 ohms in
Bridge Mode.
High Current Capacity : 60 amps peak current (5,000
watts of instantaneous power) per channel gives the
2000RB unparalleled transient response with complete
control over the movement of your speakers.
Low Noise Operation : Both preamp and power amp
stages have increased headroom so that noise (hiss) is
barely perceptible.
Three possible operating modes : Bridge Mode, Bi-amp
Mode, and Stereo Mode.
Fault Detection Circuitry : Relays automatically disconnect the amplifier from your speakers during power
up/down, or if any unsafe operating conditions occur.
Dual power supplies : Each power amp has its own
power supply. In the unlikely event there is a problem in
one channel, the other will not necessarily be affected.
Fan cooling : Temperature controlled, continuously variable fan speed.
Tuner output with footswitchable mute
Tunable Voicing Filters
Four Band Active Equalization
Boost 1 (Normal) & Boost 2 (High Gain) :
Footswitching between these two sections.
Give Technology : Gate Induced Valve Effect, used
throughout for warm, "punchy" response.
Parallel effects loop with Stereo Aux In and Aux
Return Level
Direct/balanced output : Electronically balanced, low
impedance output with variable level, pre/post & ground
lift switches.
Electronic crossover : Variable frequency
High and low frequency sends
Speakonconnectors : For reliable connection of high
power/high current outputs to speaker cabinets.
2000RB Features
3
Front Panel Features
(1) INPUT JACK
1/4'' phone jack to plug in active or passive basses with a
shielded cord
(2) -10 dB PAD
This switch should be pressed if the CLIP(3) light stays on
continuously. It may be necessary to "pad" the input if you are
using a bass with active electronics or very high output.
(3) CLIP
LED indicator which lights when the input stage is being overdriven. If -10dB PAD (2) is pressed and CLIP(3) still stays lit,
turn down the volume on your bass.
(4) TUNING MUTE
Switch that mutes all outputs from the amplifier (speakers, direct
and balanced outs) so you can tune up without sending signal to
the audience or the P.A.. Tuning mute can be footswitch
controlled by using a G-K RF2 footswitch, which will leave both
hands free to tune your instrument. To control TUNING MUTE
by footswitch, TUNING MUTE (4) switch must be "in"
(5) LED INDICATOR
Lights when TUNING MUTE is activated.
(6) VOLUME
Controls signal level at the beginning of preamp stages.
Volume should be turned up until the CLIP(7) light comes on
when you're hitting your loudest notes. At this setting you will
have the optimum signal/noise ratio. Remember that your settings in
the VOICING FILTER and ACTIVE EQUALIZATION sections
can also cause clipping. IF this occurs, re-adjust VOLUME as
explained above.
(7) CLIP
LED indicator that lights when either VOLUME, VOICING
FILTER, OR ACTIVE EQUALIZATION stages are being overdriven.
(8) BOTTOM
Voicing filter which boosts or cuts +/-12dB at very low frequencies
(20Hz center freq.). Boost this control if you want to add more
low-bass response. Or, keep it turned down if you want a tighter ,
less "boomy" bottom end.
(9) CONTOUR
Voicing filter that boosts highs (4kHz) and lows (80Hz), while
dropping out mids (600Hz). Most players use this control
between half and maximum to create a "round" or "hi-fi" sound.
Use lower settings for a "flatter" response.
(10) PRESENCE
Voicing filter that boosts high frequencies (6.5kHz center freq.)
by as much as 12dB. This control adds "edge" to help you cut
through the mix.
(11) - (14) ACTIVE EQUALIZATION
Four highly active tone controls, TREBLE, HI MID, LO MID,
AND BASS. Each band of EQ creates wide tonal variations
without affecting the other bands.
(15) BOOST 1
A post EQ gain stage using GIVE Technology which adds
"growl" as you turn it up. The RF2 footswitch allows you to
switch between BOOST1 and BOOST 2.
(16) LED INDICATOR
Lights when you have footswitched into the BOOST 2 mode.
(17) BOOST 2
A post EQ gain stage like BOOST 1, except this stage has higher
gain for "lead-bass" or solos. Use BOOST 2 with LEVEL (18)
to create the desired amount of overdrive. Note: You can only
access the BOOST 2 section via the RF2 footswitch.
(18) LEVEL
Determines the level coming out of BOOST 2 section. Used to
set a different volume level for solos.
(19) AUX LEVEL
Controls signal level coming from STEREO AUX IN (20).
Creates effects blend (dry vs. wet) when used in a "parallel"
effects loop. Can also be used to mix in any stereo source such
as tape or CD.
(20) LEFT - LOW - BRIDGE
Master volume that controls output level to speakers. In "Stereo
Mode", controls output of LEFT channel. In "Biamp Mode"",
controls output of LOW frequency amplifier. In "Bridge Mode",
controls output level of the entire amplifier.
(21) RIGHT-HIGH
Master volume that controls output level to speakers. In "Stereo
Mode", controls output of RIGHT channel. In "Biamp Mode",
controls output of HIGH frequency amplifier. In "Bridge
Mode", this control is inactive.
(22) POWER SWITCH
(23) & (26) PROTECT
LED indicators that light when L&R channels power up, power
down, or whenever the FAULT DETECTION CIRCUITRY
relays have disconnected the 2000RB from your speakers.
(24) & (27) CLIP
LED indicators that light when L&R channels are clipping.
(25) & (28) POWER
LED indicators that light when L&R channels are in normal
operation.
4
Loading...