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Bass Preamps & EQ
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Bass Preamps & EQ Circuits
Top Quality Active Electronic Systems for Bass from Bartolini, Seymour Duncan & Shadow!


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HR33 Bartolini 2 Band Preamp EQ Prewired Harness 3 Knobs HR33 - Bartolini 2-Band Preamp/EQ Prewired Harness-3 Knobs
Bartolini's world famous 2-band EQ/preamp system. (HR-3.3) Designed for instruments with 2 pickups and 3 control holes. Perfect for Jazz bass style bass guitars. Prewired controls include: master volume, pickup balance control and stacked bass and treble controls. Choose optional Active/Passive push/pull switch on volume pot (HR-3.3ap) when ordering.
HR34 Bartolini 3 Band Preamp EQ Prewired Harness 3 Knobs HR34 - Bartolini 3-Band Preamp/EQ Prewired Harness-3 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-3.4) with 2-way midrange selector. Designed for instruments with 2 pickups and 3 control holes. Perfect for Jazz bass style bass guitars. Prewired controls include: stacked neck and bridge volume controls, midrange control and stacked bass and treble controls. Midrange control has a push/pull switch which selects either 250Hz or 800Hz as the midrange center frequency. Choose optional Active/Passive mini toggle switch (HR-3.4ap) when orderi...
HR45 Bartolini 2 Band Preamp EQ Prewired Harness 4 Knobs HR45 - Bartolini 2-Band Preamp/EQ Prewired Harness-4 Knobs
Bartolini's world famous 2-band EQ/preamp system. (HR-4.5) Designed for instruments with 2 pickups and 4 control holes. Prewired controls include: master volume, pickup balance control, bass and treble controls. Choose optional Active/Passive push/pull switch (HR-4.5ap) when ordering.
HR46 Bartolini 3 Band Preamp EQ Prewired Harness 4 Knobs HR46 - Bartolini 3-Band Preamp/EQ Prewired Harness-4 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-4.6) with 2-way midrange selector. Designed for instruments with 2 pickups and 4 control holes. Prewired controls include: master volume, pickup balance control, midrange, and stacked treble/bass controls. Midrange control has a push/pull switch which selects either 250Hz or 800Hz as the midrange center frequency. Choose optional Active/Passive push/pull switch (HR-4.6ap) when ordering.
HR47 Bartolini 3 Band Preamp EQ Prewired Harness 4 Knobs HR47 - Bartolini 3-Band Preamp/EQ Prewired Harness-4 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-4.7) with 2-way midrange selector. Designed for instruments with 2 pickups and 4 control holes and 1 mini switch hole. Prewired controls include: Volume/Blend/Midrange selector switch, Master volume, pickup balance control, midrange, and stacked treble/bass controls. Choose optional Active/Passive push/pull switch (HR-4.7ap) when ordering.
HR51 Bartolini 3 Band Preamp EQ Prewired Harness 5 Knobs HR51 - Bartolini 3-Band Preamp/EQ Prewired Harness-5 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-5.1) with 2-way midrange selector. Designed for instruments with 2 pickups and 5 control holes. Prewired controls include: neck pickup volume, bridge pickup volume, midrange, bass and treble controls. Midrange control has a push/pull switch which selects either 250Hz or 800Hz as the midrange center frequency. Choose optional Active/Passive switch (HR-5.1ap)when ordering.
HR52 Bartolini 3 Band Preamp EQ Prewired Harness 5 Knobs HR52 - Bartolini 3-Band Preamp/EQ Prewired Harness-5 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-5.2) with 2-way midrange selector. Designed for instruments with 2 pickups and 5 control holes. Prewired controls include: master volume, pickup balance, midrange, bass and treble controls. Midrange control has a push/pull switch which selects either 250Hz or 800Hz as the midrange center frequency. Choose optional Active/Passive push/pull switch (HR-5.2ap)when ordering.
HR53 Bartolini 3 Band Preamp EQ Prewired Harness 5 Knobs
$147.95

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HR53 - Bartolini 3-Band Preamp/EQ Prewired Harness-5 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-5.3) with 3-way midrange selector. Designed for instruments with 2 pickups and 5 control holes. Prewired controls include: neck pickup volume, bridge pickup volume with push/pull active passive switch, midrange, bass and treble controls plus. Includes black 3-way mini switch that selects either 250Hz, 500Hz or 800Hz as the midrange center frequency.
HR54 Bartolini 3 Band Preamp EQ Prewired Harness 5 Knobs HR54 - Bartolini 3-Band Preamp/EQ Prewired Harness-5 Knobs
Bartolini's world famous 3-band EQ/preamp system. (HR-5.4) with 3-way midrange selector. Designed for instruments with 2 pickups and 5 control holes. Prewired controls include: master volume, pickup balance, midrange, bass and treble controls. Includes black 3-way mini switch that selects either 250Hz, 500Hz or 800Hz as the midrange center frequency. Choose optional Active/Passive push/pull switch (HR-5.4ap) when ordering.
GTG0310 Graph Tech Bass Acousti Phonic Pre Amp
$85.95

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GTG0310 - Graph Tech Bass Acousti-Phonic Pre-Amp
Acousti-Phonic Intelligent Bass Pre-amp & Installation Assembly The Acousti-Phonic Intelligent Preamp for Bass guitar is an integral part of the GHOST sound and provides an interface to an amp or recording/sound reinforcement console. �Intelligent� switching routes a mono or stereo signal accordingly. Includes stereo jack, battery clip and cable, wiring harnesses. Battery life 500 hours.
PMTLOBAT93 9 Volt Low Battery Indicator for Active Pickups 3 Pack
$74.95

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PMTLOBAT93 - 9 Volt Low Battery Indicator for Active Pickups (3-Pack)
3-Pack of the the LoBat9 low battery indicator circuit from Precision Music Technologies. This circuit is specifically designed for use with pickups and electronics from EMG, Bartolini, Seymour Duncan and others that use 9 volt batteries. Micro sized (3mm) LED indicator lights when battery voltage is below 7.7V. This early warning notifies the player it's time for a new battery days BEFORE tone begins to suffer! Ultra low current LED circuit allows the instrument to still be used for an exten...
PMTLBAT 9 Volt Low Battery Indicator for Active Pickups Electronics
$29.95

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PMTLBAT - 9 Volt Low Battery Indicator for Active Pickups & Electronics
The patented LoBat low battery indicator circuit from Precision Music Technologies is specifically designed for use with pickups and electronics from EMG, Bartolini, Seymour Duncan and others that use 9 volt batteries. Micro sized (3mm) LED indicator lights when battery voltage is below 7.7V. This early warning notifies the player it's time for a new battery days BEFORE tone begins to suffer! Ultra low current LED circuit allows the instrument to still be used for an extended period of time w...
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