Millimetric Instruments - MB4 Bass custom build information

This product is currently sold out, feel free to contact us for a delivery estimate


The MB4 was our first bass design developed and introduced to the range and features a modified version of the MG6 guitar shape to better suit the longer scale and size of the bass. The MB4 is a 33” scale bass.

Like the MG6, it too was intended to be ambidextrous meaning left handed players could have a bass that looks ‘correct’. It is a symmetrical hip, double cut design (with deeper horns) & features incredible upper fret access. Although it’s aesthetic was of course an important factor, the tone and sound created by the bass was a driving force behind some of the design choices. It was intended to pay homage to the noise rock scene hailing from Chicago in the 1990s with bands such as Shellac and Jesus Lizard, creating clarity, a large frequency response, sustain and punch which can also benefit more musical and playing styles too due to the dynamic nature of the sound.

The neck design, as with all of the Millimetric models, is inspired by aluminium neck guitar and bass construction and although technically is a bolt-on neck design, feels more like a through neck in it’s play-ability. It also aids the overall resonance due to the strings being anchored on the same piece of wood. The 21 frets are Jescar stainless steel measuring 2.54mm wide and 1.19mm tall, and the fretboard is 12” radius. Neck profile is our standard D to C shape (with signature volute), and you have the choice of 1st and 12th fret rough depth measurements

Millimetric offer a variety of body and neck wood choices, which are common Canadian sourced materials such as Maple, Cherry, Walnut, Poplar or Ash along with finishes which are kinder to our environment such as Livos natural oil, water based metallics or solid colour milk paint. There has been a wide variety of customer requested colours and many of these final instruments can be seen on the Millimetric social media accounts if you require some inspiration for the direction of your build.

Pickguard, control knobs, switch tip are designed and made in house from acrylic and ABS plastic (with brass insert) respectively. The bridge is also unique to Millimetric, designed and made in house from stainless steel and brass. Tuners are made in the USA by Hipshot products, and are their open gear, locking tuners. Strap buttons are recessed into the body for a cleaner aesthetic, and included with the guitar is a set of Dunlop strap locks to suit. Each guitar also comes equipped with a dual action truss rod for accurate adjustment and reliability.

Electronics are wired in house, using quality components and will be visible on the bass via it’s clear acrylic rear cavity cover. We offer a range of our own design pickups which can be discussed with your order.

The MB4 comes supplied with a Nanuk 990 fitted flightcase

Pricing and ordering
The order list is currently closed due to the wait list time reaching 3 years. I will of course be keeping in touch with Millimetric as time passes and will update as soon as orders are able to be accepted again. In the mean time, I am more than happy to answer any spec/model questions and also still welcome visits to trial the demo instrument here!

All Millimetric Instruments are made to order, and as the UK representative I can help talk you through the specs available and any finer details before putting you forward to Florian to take your build to the final drawing board.

I am very proud to now be the UK representative to Millimetric Instruments. Between myself and Florian, we have decided the best way to represent his brand here in the UK is for me to be a local contact, as well as offering you a chance to see & play a Millimetric Instrument for yourself. Something not previously possible for us being the other side of the pond.  One other advantage of this approach is that it also helps keep the costs down by not having a dealer margin required for carrying stock, helping pricing direct to the customer. 
I'm here to help discuss specs & options available on a custom build, and hopefully provide you with a chance to come a try one to get a feel for what makes these beautifully made instruments worth ordering.
Here I will have a UK demonstration instrument, which you are welcome to come and try, and if you fall in love with it, we can discuss a custom build further.
To book an appointment to come and try a Millimetric Instrument for yourself, feel free to get in touch with me at and I'll look forward to meeting you.

The price stated here is merely a rough guide for the starting price, for the sake of this product listing and not a final price of any instrument. As all build specs vary, please do get in touch to discuss further and we will obtain a final spec estimate from Millimetric instruments for your dream guitar.

To begin discussing your custom Millimetric MB4, please get in touch with me at and we will geek out.