RGP Active Bass Wiring System
Rothstein Guitars is a recommended supplier on the ToneQuest Report
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RGP Kit
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RGP Prewired System IV
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WHAT IS RGP?
The Rothstein RGP is a fully customizable wiring system including an ulta-high quality active EQ circuit designed for bass guitars with passive pickups.
WHY IS IT SPECIAL?
- It is the only active system for bass with an option for a series/parallel switch. The series/parallel switch enables you to switch between the classic j-bass sound featuring both pickup in parallel, and the more punchy p-bass sound featuring both pickups in series.
- Each unit is custom made to order and therefore, fully customizable - you can pick from a variety of options.
- It is made in the USA by Rothstein Guitars, and constructed from only the highest quality components.
WHAT DOES IT SOUND LIKE?
It will add lots of chacter and versatility to your bass arsenal. Listen to the following sound samples.
ABOUT THE SAMPLES: All of these samples were recorded using a Jazz bass with Nordstrand NJ4 pickups direct into a Pro Tools HD system with no additional enhancements. Absolutely no compressors, studio pramps, amp simulators, etc were used.........nothing. Just bass direct into Pro Tools, so you will hear the true nature of the RGP preamp.
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Sample Description |
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.aiff (3.3 mb) |
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Wind Cries Mary full bass and full treble, played along with Guitar (Strat) |
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n/a |
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Parallel Flat (preamp bypassed) |
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Parallel_Full_Bass (10), Treble flat (center) |
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Parallel Full Treble (10), Bass flat (center) |
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Parallel Full Bass (10) and Full Treble (10) |
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Parallel Cut Treble (0) and Cut Bass (0) |
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Series Flat (preamp bypassed) |
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Series Full Bass (10), Treble flat (center) |
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Series Full Treble (10), Bass flat (center) |
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Series Full Bass (10) and Full Treble (10) |
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Series Cut Treble (0) and Cut Bass (0) |
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DOES IT REQUIRE A BATTERY?
RGP is an active system, so it requires the use of a 9V battery. A stereo jack is included so the 9 volt battery is switched on automatically when a mono jack is plugged into the socket (therefore saving battery life).
WILL IT MOUNT IN AN INSTRUMENT WITH A THICK TOP?
No. The threaded portion of the 100K center detent pots measures 1/4" long and will mount to either a control plate, pickguard or a thin wood top. You may substitute any 100K linear taper pots, so if you can acquire appropriate alternate pots you may use them.
WHAT ARE THE FEATURES OF THE PREAMP?
It is a 2 band preamp. Two pots provide you with separate control over bass and treble frequencies. Each pot provides up to 12 db variable treble and bass boost/cut. Both pots come with a center detent and yield a "flat" response when in the center detent position. Rotating the pot clockwise will provide a boost, and rotating the pot counterclockwise will cut as per the following frequencies:
- Bass Frequencies: +/ - 12 db starting @ 25 Hz to 100 Hz.
- Treble Frequencies: +/ - 12 db centered around 3 KHz but has significant boost To 10 KHz.
WHAT ARE THE AVAILABLE CONFIGURATIONS?
RGP is available in the following 4 configurations:
- RGP IV Preamp Kit - wiring kit for dual pickup instruments with 4 control knobs
- RGP III Preamp Kit - wiring kit for single pickup instruments with 3 control knobs
- RGP Prewired System IV - prewired assembly for Fender Jazz bass style dual pickup instruments instrument with 4 control knobs (such as the Fender Deluxe) available mounted either to a metal control plate or a wooden template
- RGP Prewired Sytem III - prewired assembly for single pickup instruments with 3 control knobs mounted to a wooden template
In addition, you have the ability to customize the products by selecting from the following options:
- Acitve/Passive Switch
- Series/Parallel Switch (RGP IV and Prewired System IV only)
- 250K vs. 500K volume pot(s)
- J-Bass Control Plate (RGP Prewired Sytem IV only)
- J-Bass Black Knobs (RGP IV and Prewired System IV only)
HOW MUCH DOES IT COST?
- RGP Preamp Kit
- RGP IV - for use with dual pickup bass with 4 controls - starting at $109.99
- Includes the following:
- RGP preamp prewired to (2) 100K center detent pots.
- Prewired stereo jack
- Battery snap
- 2 volume pots (choose between 250K and 500K)
- Option to add an Active/Passive switch via a push-pull pot ($7.50 extra)
- Option to add a Series/Parallel switch via a push-pull pot ($7.50 extra) - note: this is only an option for dual pickup instruments
- Option to include knobs ($8 extra).
- Hook up wire
- Wiring diagrams and instructions to install in either a dual pickup 4 control bass, or single pickup 3 control bass.
- RGP III - for use with single pickup bass with 3 controls - starting at $104.99
- Includes the following:
- RGP preamp prewired to (2) 100K center detent pots.
- Prewired stereo jack
- Battery snap
- 1 volume pot (choose between 250K and 500K)
- Option to add an Active/Passive switch via a push-pull pot ($7.50 extra)
- Hook up wire
- Wiring diagrams and instructions to install in either a dual pickup 4 control bass, or single pickup 3 control bass.
- RGP Prewired System
- RGP PREWIRED SYSTEM IV - Fully prewired harness for dual pickup instruments with 4 controls - starting at $129.99
- Includes the following:
- Pot 1: Neck volume
control
- choose between 250K and 500K
- Option to include Series/Parallel Switch ($15 extra)
- Pot 2: Bridge Volume pot
- choose between 250K and 500K
- Option to include Active/Passive Switch ($15 extra)
- Pot 3: Bass cut/boost (w/center detent)
- Pot 4: Treble cut/boost (w/center detent)
- Stereo jack
- Battery snap
- Option to include black plastic jazz bass knobs ($8 extra)
- Option to include chrome control plate for Jazz Bass ($15 extra)
- Installation Instructions
- RGP PREWIRED SYSTEM III - Fully prewired harness for single pickup instruments with 3 controls - starting at $124.99 (such as the Fender Deluxe).
- Includes the following:
- Pot 1: Master volume
control
- choose between 250K and 500K
- Option to include Active/Passive Switch ($15 extra)
- Pot 2: Bass cut/boost (w/center detent)
- Pot 3: Treble cut/boost (w/center detent)
- Stereo jack
- Battery snap
- Installation Instructions
WIRING DIAGRAMS
ADDITIONAL TECHNICAL SPECS
- The RGP preamp requires a single 9 volt battery.
- Output impedance = 2 Kohms
- Current = 1.6 milli amps
- Bass Frequencies: +/ - 12 db starting @ 25 Hz to 100 Hz.
- Treble Frequencies: +/ - 12 db centered around 3 KHz but has significant boost To 10 KHz.
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