4-string · Bolt-on
Batch #1. Swamp ash body, ebony fingerboard (21 frets) with Luminlay side dots, Thunderbird pickups in Jazz spacing. Finishes: Firemist Lavender, Ice Blue Metallic, Ice Green Metallic. Ian Martin Allison (IMA) signature bass - a Jazz/Thunderbird hybrid ('a 70s Jazz combined with the best features of a Thunderbird') built by Mike Lull Custom Guitars in Bellevue, WA. Lightweight (sub-8.5 lb), graphite-reinforced maple neck with an oversized reverse headstock, 12" fingerboard radius, 1.55" bone nut, Mike Lull Thunderbird pickups, passive VVT wiring harness, Hipshot Ultralite tuners and B-Style bridge, Plek'd with full electrostatic shielding. Deliberately carries no signature branding. Highly limited run.
| Construction | Bolt-on |
| Strings | 4 |
| Body | Lightweight solid swamp ash |
| Neck | Graphite-reinforced maple |
| Fingerboard | Ebony |
| Neck Pickup | Mike Lull Thunderbird |
| Bridge Pickup | Mike Lull Thunderbird |
| Controls | Passive: volume, volume, tone (VVT) |
| Bridge | Hipshot B-Style |
| Made In | USA |
Artists documented playing the Mike Lull IMA4 Batch 1: Ian Martin Allison.