Nordstrand 3B-4a 2-Pickup 4-Knob 3-Band Vol/Vol Stack - Tone P/P A/P - Mid P/P - Treb/Bass Stack

SKU:BBG 7165


3B-4a ( 2 pickup - 4 Knob)- Volume/Volume Stack- Passive Tone (pull passive)- Mid (pull frequency selector)- Treble/Bass Stack
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Nordstrand 3B-4a

Control Configuration

  1. Volume/Volume Stack
  2. Passive Tone (Push/Pull Active/Passive)
  3. Mid(Push/Pull)
  4. Treble/Bass Stack
  5. Technical Specifications

  6. Overall Gain: +/- 10db by a trim pot on the module
  7. Treble: +/- 12db @4khz
  8. Midrange:+/-12 dB@1K (mid freq selector toggles between 1kHz and 400Hz with no external capacitors
  9. Bass:+/- 12db @ 50hz
  10. Battery life is estimated to be around 180 hours for an Alkaline 9v. Adding an additional battery for 18v will provide more headroom and longer battery life.


Rate and Review this item
Verified Buyer
This preamp is great!
By Larry Gonzalez from on 5/12/2016
First, it was really easy to install, the epoxy box has double sided tape that you can use to attach the preamp to a side of the control cavity.

The options for tone are amazing, the ability to use a Tone Control and also use the High control to mix up the sound and get a bright tone without harsh highs is amazing.

Once you switch to passive mode, you have volume/volume and tone to use, so you can mix up the sound just like in a Jazz bass.

I can recommend this preamp, is very musical, you can get an excellent tone and great combinations.