Powered by Fretsense™

Made with select timbers and quality hardware, including Nordstrand pickups and Hipshot Ultralite tuners, the PRO-4 MIDI Bass is the perfect companion for the professional bassist who wants to harness the power of MIDI and get more out of their instrument of choice both live and in the studio.

The PRO-4 MIDI Bass utilises Industrial Radio's unique mutli-sensor Fretsense MIDI technology to provide the lowest possible latencies with more accuracy than pitch-to-voltage systems, making the PRO-4 the most playable bass MIDI controller on the market.

System Price

* Price includes PRO-4 MIDI bass guitar, Fretsense™ Interface (FSI-1), Fretsense cable, SKB bass case, power supply & miscellaneous accessories for instrument care. Some options incur addtional charges. Price does not include shipping and duties. Australian customers required to pay 10% GST.

Build Time: 6 months

Current build time for a PRO-4 MIDI Bass is 6 months.
The deposit for a PRO-4 MIDI Bass is US$1500.00.

Bass Specification

The specification (not including additional options).

Model PRO-4 MIDI Bass
Body Finishes See below
Body Wood Alder or Swamp Ash
Neck Rock Maple reinforced neck
with double expanding truss rod with 'hex nut' adjustment
Fingerboard Pau Ferro
with polycarbonate fingerboard overlay
Scale Length 34"
Width at Nut 1.5" (38mm)
Radius 10"
No. of Frets 21
Frets Industrial Radio split frets,
Hand levelled and polished
Nut GraphTech TUSQ®
Bass Tuners Hipshot Ultralite™ chrome
Pickups Bartolini
Bridge Chrome bridge pieces fitted with
Graph Tech piezo saddles and Industrial Radio pitch bend sensors
Pickguard Options Black, White, Tortoise Shell, Red Tortoise Shell, Mint, Parchment, Black Pearloid, Dark Black Pearloid, White Pearloid (all 3-ply)
Controls MIDI Volume,
Neck Pickup Volume,
Bridge Pickup Volume,
Programming Switch
Connections 15-pin connector for Fretsense cable,
Standard 1/4" audio output jack
Display White, back-lit, 2-line, 32 character Liquid Crystal Display
(sunlight & dark stage readable)

Warmoth Build

All PRO-4 bodies and necks are constructed by USA company Warmoth Guitar Products. The PRO-4 bodies are completely fabricated and painted by Warmoth while the necks are fabricated but are provided unfretted and unpainted so that we can perform the necessary processes to make them Fretsense™ necks, including fretting, splitting the frets, and wiring the frets. Warmoth have been building guitars for decades and their craftsmanship is very high. They provide an astounding range of finishes and customisable options.

Bass Guitar Options

While we don't offer all the possible wood types, finishes and options that are on offer at Warmoth we can provide several options.

Body Finishes

We can provide the bulk of finishes that Warmoth offer though there are a few exceptions. The best way to discover and decide what you want is to check out Warmoth's finishes page and let us know via email what finishes you prefer and we will take it from there.

Laminate Tops

You can also add a laminate top to your order (Add $115.00). The following woods are available.

  • Koa
  • Flame Maple
  • Quilted Maple
  • Walnut


Various accent options can be achieved by masking areas of the wood or adding contrasting coloured woods to laminate. These options either require or are especially suited for orders with laminate top option. For more information contact us.

  • Natural Wood Masked Accent (Add $115.00)
  • Light Wood Laminate Accent (Add $30.00)
  • Dark Wood Laminate Accent (Add $30.00)