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The UNI-PRE is a new generation bass preamp system from East UK. It's a brand new modular design that sets new
standards with unique features. Designed to fit virtually any bass with rear cavity electronics, the UNI-PRE is available in 3,
4 or 5 knob configurations as either 2 or 3 band EQ. Although it is designed as a complete system, the Volume/ Blend and
EQ modules are also available individually for stand-alone use.
Its main components are the Volume/Blend and EQ modules. The Volume/Blend module has totally independent dual active
and passive signal paths. In other words two volumes and two blends are controlled simultaneously with a conventional
knob set, using custom pots. The EQ module allows internal voicing adjustment for the treble as well as the lower and upper
bass frequencies for the bass control. This is to allow finely tuned focus on the most crucial parts of the bass spectrum.
Modular construction makes for easy installation, with simple plug connections between modules. External wiring, such as
pickups and power, are simply connected using screw terminals.
• UNI-PRE 3 Knob
• UNI-PRE 4 Knob
• UNI-PRE 5 Knob
Summary of features:
• Totally independent active and passive signal paths guarantee completely smooth blend when set to active.
• Custom designed pots allow optimal placement of all controls within active and passive signal paths.
• Class A FET input stages for great sound quality, with two gain trim preset adjusters, one for each pickup.
• Operational response of Bass Control can be set internally at both the lower and upper end of the bass spectrum.
• Treble Control with internally adjustable frequency voicing, plus Bright as a pull switch.
• Mid Control with Frequency Sweep.
• Overall response can be set as flat or with pre-shaper contour which adds some warmth and sheen.
• Modular concept allows for easy installation and replacement of parts, all with pluggable inter-connections.
• Screw terminals are used for all external connections such as pickups, power and grounding for easy installation.
Universal Active/Passive Bass Preamp System
TREBLE (Pull for BRIGHT)
TREBLE (Pull for BRIGHT)
BASS
TREBLE (Pull for BRIGHT)
MID FREQUENCY SWEEP
BASS
MID
VOLUME
MID FREQUENCY SWEEP
BASS
MID
VOLUME
MID FREQUENCY SWEEP
MID
BLEND
Page 1
Pickups
ACTIVE/PASSIVE
BLEND
Pickups
PASSIVE TONE
BLEND
P-P Active / Passive
VOLUME
PASSIVE TONE
P-P Active / Passive
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Table of Contents
Related Manuals for East UNI-PRE 4 KNOB
Summary of Contents for East UNI-PRE 4 KNOB
- Page 1 Universal Active/Passive Bass Preamp System The UNI-PRE is a new generation bass preamp system from East UK. It’s a brand new modular design that sets new standards with unique features. Designed to fit virtually any bass with rear cavity electronics, the UNI-PRE is available in 3, 4 or 5 knob configurations as either 2 or 3 band EQ.
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Page 2: Technical Details
Technical Details • VOLUME / BLEND CIRCUITS 5 Knob Type 3 & 4 Knob Type VOLUME BLEND VOLUME BLEND PICKUP PICKUP GAIN TRIMS GAIN TRIMS PLUG-IN PLUG-IN TONE CAPS TONE CAPS POWER & OUTPUT PICKUP INPUTS POWER & OUTPUT PICKUP INPUTS • EQ CIRCUIT TREBLE (Pull for BRIGHT) SET TREBLE CONTROL FREQ... - Page 3 Unique Dual Active & Passive Paths Scheme • VOLUME / BLEND FEATURES The UNI-PRE has a unique dual path Volume/Blend system where the active and passive paths are completely inde- pendent in order to optimise the control of each mode. Many systems have a passive volume and blend which feeds an active circuit.
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Page 4: Circuit Board
This Section Applies the 3, 4 & 5 Knob Types • EQ CIRCUIT BOARD The UNI-PRE EQ has a number of unique features and the factory default settings are as follows: • Flat Response / Pre-Shaper - set to Flat Response. •... - Page 5 4 Knob Controls & Functions BASS Pickups BLEND PASSIVE TONE (P-P Active / Passive) VOLUME TREBLE (Pull for BRIGHT) MID FREQUENCY NOTE: With regard to knob rotation: CW = Turning a knob up towards maximum or clockwise ACW = Backing a knob off, turning it anti-clockwise or counter-clockwise • VOLUME &...
- Page 6 4 Knob Controls, Functions & Installation • PASSIVE TONE • TONE ROLL-OFF Set CW for no effect. Adjust ACW in order to mellow the treble and fully backed off for the ‘darkest’ sound. • PUSH-PULL Switch Pull for the Passive Signal path which consists of the Volume, Blend and Passive Tone. Push in the full Active Signal path.
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Page 7: Knob Installation
4 Knob Installation UNI-PRE 01 4 KNOB VOLUME/BLEND CIRCUIT BOARD CONNECTIONS & SETTINGS Pickup Plug-In GAIN TRIMS BRIDGE TONE CAP TO EQ CIRCUIT BOARD PASSIVE BROWN TONE BRIDGE NECK BROWN ORANGE ORANGE YELLOW YELLOW GREEN GREEN POWER & BLUE PICKUP BLUE PURPLE OUTPUT... -
Page 8: Warranty
Warranty GUARANTEE • Your East product is guaranteed to be free from defects in materials and workmanship for a period of one year from the date of original purchase. • If during the guarantee period your product becomes faulty due to defective materials or workmanship, then the unit will be repaired or replaced without charge for parts or labour at the discretion of EastUK, according to the conditions below.