Shopping Cart

Your cart is empty.

Your cart is empty.

EMG BQC 4-knob Active Bass Preamp System

Free shipping on orders over $29.99

$199.00

$ 94 .99 $94.99

In Stock
  • A complete control system for bass guitars
  • Active Balance, Master Volume and EQ circuits are included
  • The EQs allow you separate control over bass, midrange, and treble all via 2 concentric/stacked pots
  • Rotate the control clockwise to boost, counterclockwise to cut
  • There is a center detent for flat response.The mid-range control has a variable frequency knob to sweep through the mid-frequency range from 100Hz to 1KHz.This selects the frequency to boost or cut


The BQC System is a complete control system for bass guitars. Active Balance, Master Volume and EQ circuits are included. The EQs allow you separate control over bass, midrange, and treble all via 2 concentric/stacked pots. Rotate the control clockwise to boost, counterclockwise to cut. There is a center detent for flat response. The mid-range control has a variable frequency knob that allows you to sweep through the mid-frequency range from 100Hz to 1KHz. This selects the frequency to boost or cut.


Giambattista Parodo
Reviewed in the United States on June 22, 2019
Really nice electric corcuit! Installed with EMG alnico pickups in my bass guitar and the bass become a kickass! Really good purchase!
Chuck Brooks
Reviewed in the United States on August 2, 2018
Been using EMG electronics for many years; no complaints!!
Craig MW
Reviewed in the United States on December 24, 2018
I purchased this kit to replace the stock preamp on my Spector 5LX. I ended up using the stock volume controls on the two pickups because they are EMG 40TWs which require a switched pot (which doesn't come with the kit). But, the kit was easy to use without the blend and volume pots (I know, I should have gotten the EMG BQC Control instead of System). After installing and adding some metal knobs designed for concentric pots, the tone is amazing. So much cleaner and powerful than the stock preamp. I ended up wiring this as 18V, so that may be part of the reason, but this setup really brings out that Spector tone. I love all the tonal possibilities, especially with the sweepable mid. Wonderful upgrade!
Bartecus
Reviewed in the United States on January 4, 2018
Much improved over the old preamp. I was thinking of going passive with this bass, but decided to get an OBP that matched my PUPs. Since it had active EMGs... Definitely more gain, and a lot more control over the sound compared to what I took out.
Mark Findlay
Reviewed in the United States on December 16, 2017
Brings the bass to life.
Randallissimo
Reviewed in the United States on November 14, 2016
didn't fit in a Fender bass.
AEBell
Reviewed in the United States on December 20, 2012
Nice upgrade. I bought this to replace the tone pump that came with my Spector Rebop bass. This in combination with the EMG-40DC pickups made for a significant upgrade to the bass. Great sound, great control. Easy to install with the solderless system. I had it installed and playing in just over an hour. Not bad at all.
lowtones
Reviewed in the United States on January 12, 2012
I recently acquired a Steinberger XM-2 that had passive controls and I decided to go with more flexibilty so I purchased this system. The XM-2 has MIA active EMG's and the previous owner had already drilled an extra hole for an EMG boost switch, so I didn't feel bad about having to drill anything new. I also wanted to keep it brand consistent.It's a powerful tone system - Volume, Blend, Stacked Bass/Treble and a sweepable Mid. I particularly like that feature. I have some basses with Aguilar OBP-3's (also excellent) but they only offer 2 frequency choices that can be toggled with a switch or a push/pull pot. Granted the choices are effective, but not the same as a sweep.An excellent preamp from the people at EMG.
Recommended Products

$179.99

$ 81 .99 $81.99

4.6
Select Option

$79.00

$ 38 .99 $38.99

4.3
Select Option

$19.12

$ 8 .99 $8.99

4.9
Select Option

$24.95

$ 12 .99 $12.99

4.7
Select Option

$19.26

$ 8 .99 $8.99

4.4
Select Option