Powered by Fretsense™

The IR-J4 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 IR-J4 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.

Base Price


Popular Finishes

NOTE: Base price includes MIDI bass guitar, FSI-1 Fretsense Interface, Fretsense Cable (5m), hardshell SKB guitar case, power adaptor and accessories. Deposit amount is US$1500.00. Shipping not included (see here).

Bass Specification

Body Wood Alder or Swamp Ash
Body Finish Gloss
For finish options see Warmoth
Neck Rock Maple
with double expanding truss rod with 'hex nut' adjustment
Fretboard Gidgee
with polycarbonate fingerboard overlay
Scale Length 34"
Width at Nut 1.5" (38mm)
Radius 10"
No. of Frets 21
Frets Jescar stainless steel,
Industrial Radio split frets
Bass Tuners Hipshot Ultralite™ Licensed chrome
Pickups Passive, single coil, Alnico V
(pole pieces visible)
Bridge Chrome bridge pieces fitted with
Graph Tech piezo saddles and Industrial Radio pitch bend sensors
Pickguard See below.
Controls MIDI volume (click for Preset Select),
Neck pickup volume,
Bridge pickup volume
Connections 15-pin connector for Fretsense cable,
Backup 1/4" audio output jack


Pickguard Choose from various pickguard materials.

  • Black (3-ply)
  • White (3-ply)
  • Parchment (3-ply)
  • Mint (3-ply)
  • Tortoiseshell (3-ply)
  • Black Pearloid (4-ply)
  • Dark Black Pearloid (4-ply)
  • White Pearloid (4-ply)

Upgrade Options

Some bass hardware upgrade options.

  • Hipshot Ultralite™ tuners (add $100.00)
  • Hipshot Ultralite™ tuners with extender/drop tuner (add $160.00)

Build Time

The current build time is 12 months.

Black-Red-Yellow Burst

Quality Parts

We use quality brand hardware and parts.

Hipshot Products Graph Tech Guitar Labs SKB Cases