Bartolini NTMB 3 Band Bass Preamp - HR-4.6/918 - 2 Pickup - 4 Knob (V-Bl-Mpp-T/B)

Brand New
+ $46.41CAD Shipping
3 in stock
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Shipped From
Fat Bass Tone, LLC
Wells, ME, United States
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About This Listing

HR-4.6/918 - 2 Pickup - 4 Knob (V-Bl-Mpp-T/B)

Bartolini’s most popular preamp for decades, the NTMB is a 3-band tone control preamp with fully independent Bass, Mid and Treble controls.

· One of the most popular bass preamps in history

· Overall gain is adjustable via a trim pot on the preamp module

· Active/passive switching NOT available on this model

·Configurable to use 9 or 18 volt

It is well known to professionals for its very low noise and wide boost and cut range for aggressive control. The voice is clear, transparent, and strong. The treble frequency is set high for maximum available brightness. 

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. Bartolini includes 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. Bartolini uses only professional lead-free solder with non-corrosive flux.

One concentric knob set is included with harness.  Bartolini does not include any other knobs with their preamps. 


HR-4.6/918 - 2 Pickup - 4 Knob (V-Bl-Mpp-T/B) NO Active/Passive
Volume -- Blend -- Mid w/Mid Frequency Selection Push-Pull -- Treble/Bass Stack

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.

Gain Control

  • The in-cavity gain trimmer lets you adjust the output level of your instrument. This lets you match output levels from several instruments for consistent response from level-sensitive effects 
  • Gain: 0-12dB

Bass Control

  • Boost or cut your low frequencies up to 5 times the flat signal. The bass frequency is great for E, B, and low F# strings.
  • Bass: +/-15dB@30Hz

Mid Control

  • Thicken or thin your tone with mid control. Mid boost lets you cut through the mix, and mid cut provides great slap tone. Flip the toggle to set the mid frequency to 250Hz, 500Hz, or quickly flip to 800Hz for a solo with a 3 position toggle on a HR-4.7AP/918, HR-5.3AP/918 or HR-5.4AP/918 system. On no-toggle switch systems the mids are a push/pull selectable between 250hz when pushed in, and 800hz when pulled out.
  • Mid: +/-13dB@250/500/800Hz

Treble Control

  • Boost or cut your high frequencies to brighten or darken your tone. The NTMB gives you a wide control range for an aggressive or mild voice.
  • Treble: +/-18dB@10KHz

Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Made In
  • United States

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