Bartolini 5.4AP NTMB-GFL (Fretless) Compact Preamp

SKU:BBG 7977
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Bartolini 5.4AP NTMB-GFL (Fretless) Compact Preamp


5.4AP NTMB-GFL (Fretless) Compact Preamp

The new Bartolini NTMB Systems have eliminated the second module and have only the single 1-3/4" x 1" x 1/2" module. There is also a weight saving on the new systems of 20 grams.

The NTMB+FL is designed to put more focus on the mid frequencies. As such, the bass control has less range than the NTMB+F ( +/-12dB @30Hz vs. +/-15dB @30Hz). Also the treble control has less range and is set at a lower frequency than the NTMB+F ( +/-15dB @6.5KHz vs. +/-18dB @10KHz).

Control Configuration

  • Volume (Active/Passive Push-Pull)
  • Blend
  • Treble
  • Mid
  • Bass
  • Mid Frequency Selector Switch

A Pre-Wired harness saves the time and aggravation of wiring your pre-amp and pots into your instrument. They feature our industry leading pre-amps and premium audio-quality potentiometers with smooth control and ready for years of rugged use.


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Verified Buyer
bartolini 5-4AP/918 ntmb glf+ preamp.
By william Voight from on 3/16/2017
Just installed this unit int my Cort Artisan B4 Fretless bass and fired it up.
A massive improvement on the stock MK1 installed as original equipment to this bass.