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Bartolini HR-2.3AP/918 2-Band EQ

On-board Preamp
Bartolini
(1)
CHF 185.00
Soon in backorder
Free delivery in Switzerland
Variants
HR-2.3AP/918 - Active/Passive.

The NTBT is a 2-band tone control preamp with fully independent Bass and Treble controls. The voice is clear, transparent, and strong with wide boost and cut range for aggressive control. The NTBT features an adjustable gain which allows you to boost the input signal up to 12dB while maintaining flat frequency response. A professionally pre-wired and fully pre-tested harness saves the time and aggravation of wiring your preamp and pots into your instrument. Wired with our pro-level preamp and premium audio-quality pots and switches, you’ll have smooth control and be ready for years of rugged use. We include battery clips and an output jack for quick installation. All the pots are grounded with a wire that can be connected to the cavity shield or simply cut away if not needed in your installation. Everything is pre-soldered with pro-quality pure copper wire that is double tin plated and protected with semi-rigid insulation so it won’t flop around in the cavity or degrade over time. We use only professional lead-free solder with non-corrosive flux. Knobs are a personal choice, so they are not included with the harness – except where there is a stacked (concentric) pot, we include a ring knob and center knob since they are not as common.

  • Preamp Module Size:
  • 1.76" [44.7mm] Long,
  • 1.02" [25.9mm] Wide,
  • 0.54" [13.7mm] Thick
  • Operating Voltage:
  • 9V or 18V - Prewired for 9V. An additional battery clip is included for 18V wiring.
  • Mid:
  • Center@400Hz

Product Details
Product Number
252139
Brand
Bartolini
Category
On-board Preamp
Relevancy rank in Category On-board Preamp
9 of 22
Date
August 2025

2
(1)

The preamp comes, of course, as a "pre-wired" kit, with all the wiring already done. Everything is neatly soldered, and everything is in perfect condition. Or is it? In my case, the layout of the potentiometers on my guitar doesn't match that of the HR-5.2. And then the problems start. The components are connected together using a very rigid grounding wire. It's impossible to install this in my guitar in this configuration. Why doesn't Bartolini simply use a flexible cable? And the very short connecting wires are also not helpful. So, the only solution is to use wire cutters and a soldering iron to sort it out and, ultimately, rewire. In conclusion: If you have a guitar in which the Bartolini pre-wiring happens to fit, then this "pre-wired" kit might be a good option. However, if it doesn't, it would be much easier to buy and install the preamp and potentiometers separately. By the way, that's what I eventually did. But be careful: Some components (e.g., 50k potentiometers and 50k push-pull potentiometers) are not always easy to find.

Operation