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Bartolini

HR-3.4/918

Bartolini NTMB 3 Band Bass Preamps

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 available on most models

·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.

    A concentric knob set is included with harnesses which have a stacked pot. Bartolini does not include any other knobs with their preamps. 

    Artists: Alissia Benveniste, Lige Curry, Adam Saylor, Elon “Tone” John, Stefan Marinov, Vincent Medina, Chuck Jacobs, Derrick “Swol” Ray, Eric “EQ” Young, Courtney Leonard, Curt Chambers, Cory Baker, Jan Nissimov, Pato Munoz, Lige Curry, Willie “Koot” O. Lemons III, E. Pruitt “E”, Joey Green, Blair Bryant, Jahmal Nichols, Jackie Hancock, Kevin Hide
  • Configurations Offered:

    HR-3.4/918 - 2 Pickup - 3 Knob (V/V-Mpp-T/B)
    Volume/Volume Stack -- Mid w/Mid Frequency Selection Push-Pull -- Treble/Bass Stack

    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

    HR-4.6AP/918 - 2 Pickup - 4 Knob (Vpp-Bl-Mpp-T/B)
    Volume w/Active-Passive Push-Pull -- Blend -- Mid w/Mid Frequency Selection Push-Pull -- Treble/Bass Stack

    HR-4.7AP/918 - 2 Pickup - 4 Knob & 1 Switch (Vpp-Bl-M-T/B-MSW)
    Volume w/Active-Passive Push-Pull -- Blend -- Mid -- Treble/Bass Stack -- Mid Frequency Selection Switch

    HR-5.2/918 - 2 Pickup - 5 Knob (V-Bl-T-Mpp-B) NO Active/Passive
    Volume -- Blend -- Treble -- Mid w/Mid Frequency Selection Push-Pull -- Bass

    HR-5.2AP/918 - 2 Pickup - 5 Knob (Vpp-Bl-T-Mpp-B)
    Volume w/Active-Passive Push-Pull -- Blend -- Treble -- Mid w/Mid Frequency Selection Push-Pull -- Bass

    HR-5.3AP/918 - 2 Pickup - 5 Knob & 1 Switch (Vpp-V-T-M-B-MSW)
    Volume w/Active-Passive Push-Pull -- Volume -- Treble -- Mid -- Bass -- Mid Frequency Selection Switch

    HR-5.4AP/918 - 2 Pickup - 5 Knob & 1 Switch (Vpp-Bl-T-M-B-MSW)
    Volume w/Active-Passive Push-Pull -- Blend -- Treble -- Mid -- Bass -- Mid Frequency Selection Switch

  • 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


  • Below are impressions and anecdotal thoughts gathered over the years. Some are our own and some are from customers.

    • Capable of producing great fat, thick and round tones
    • Moderately aggressive (not subtle, not overly aggressive)
    • Players commonly site this preamp is being quite musical
    • Ability to adjust the overall output of the active signal

Customer Reviews

Based on 6 reviews
83%
(5)
0%
(0)
17%
(1)
0%
(0)
0%
(0)
T
T.S.
Fat Bass Tone delivered the goods!

Excellent service and prompt delivery. Keep it up fellas.

Z
Z.F.
Bartolini NTMB 4.7apj preamp

Extremely low noise and great tone, I highly recommend this preamp because it will most definitely bring your bass to life.

T
T.H.
Rating a great company

Excellent service , quick delivery of the correct product !!

D
D.
It Worked

Have a boutique neck-through bass guitar I bought a while back that played wonderfully, but was lacking in output with a very old, 2-band EQ and no-name pickups. The Bartolini Classics and 3 band pre-amp turned the bass into a beast. Installed in the guitar’s existing soapbar/4-hole EQ layout without problem. Looking at Barts again for another project. Very satisfied with this purchase!

B
B.B.
Wow and huh?!

First, the positive.....

Love the sound of the preamp, after installing it. A definite upgrade to the onboard preamp in my Fender P bass.

Now for the Huh?!

1 - Bartolini DOES NOT include knobs FOR ANY of the CONTROLS, EXCEPT the stackable Bass/Treble.
I was able to find push on plastic black knobs for the three controls ( $9 ) , but honestly, for the price I paid for the preamp, they could include three knobs. You've been warned.

2 - If you'll be installing this in a P bass, you'll need to add wire to at least two of the controls, in order for it to fit properly and without crimping or breaking any connections.
This could be solved by Bartolini by adding an additional 4" to each control in the preamp, and let the person installing it simply trim off any un-needed wire, which is what I had to do to get the preamp to install properly without issues.

NOTE: Though I'm NOT blaming Fat Bass Tone for these issues, adding a disclaimer to the listing regarding there being no knobs, and the possibility of needing additional wire to install the preamp, both seem in order.

Glad the preamp sounds good, Bobby! Thanks for your comments about the knobs and wire length. We'll pass this on to the folks at Bartolini.

Customer Reviews

Based on 6 reviews
83%
(5)
0%
(0)
17%
(1)
0%
(0)
0%
(0)
T
T.S.
Fat Bass Tone delivered the goods!

Excellent service and prompt delivery. Keep it up fellas.

Z
Z.F.
Bartolini NTMB 4.7apj preamp

Extremely low noise and great tone, I highly recommend this preamp because it will most definitely bring your bass to life.

T
T.H.
Rating a great company

Excellent service , quick delivery of the correct product !!

D
D.
It Worked

Have a boutique neck-through bass guitar I bought a while back that played wonderfully, but was lacking in output with a very old, 2-band EQ and no-name pickups. The Bartolini Classics and 3 band pre-amp turned the bass into a beast. Installed in the guitar’s existing soapbar/4-hole EQ layout without problem. Looking at Barts again for another project. Very satisfied with this purchase!

B
B.B.
Wow and huh?!

First, the positive.....

Love the sound of the preamp, after installing it. A definite upgrade to the onboard preamp in my Fender P bass.

Now for the Huh?!

1 - Bartolini DOES NOT include knobs FOR ANY of the CONTROLS, EXCEPT the stackable Bass/Treble.
I was able to find push on plastic black knobs for the three controls ( $9 ) , but honestly, for the price I paid for the preamp, they could include three knobs. You've been warned.

2 - If you'll be installing this in a P bass, you'll need to add wire to at least two of the controls, in order for it to fit properly and without crimping or breaking any connections.
This could be solved by Bartolini by adding an additional 4" to each control in the preamp, and let the person installing it simply trim off any un-needed wire, which is what I had to do to get the preamp to install properly without issues.

NOTE: Though I'm NOT blaming Fat Bass Tone for these issues, adding a disclaimer to the listing regarding there being no knobs, and the possibility of needing additional wire to install the preamp, both seem in order.

Glad the preamp sounds good, Bobby! Thanks for your comments about the knobs and wire length. We'll pass this on to the folks at Bartolini.

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