# What are the best professional-grade fretless bass guitars available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the best professional-grade fretless bass guitars available?

## Products

### Michael Kelly Pinnacle 5 String Fretless
```yaml
product: michael-kelly-pinnacle-5-string-fretless
brand: Michael Kelly
price_gbp: 665.68
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
scale_length: 34 in
body_material: Swamp ash
neck_material: Maple/Walnut
number_of_strings: 5
fingerboard_material: Ebony
pickup_configuration: H-H
```

- **Price:** £665.68 [^1]
- **Summary:** The Pinnacle 5 String Fretless is a professional-oriented five-string bass with a swamp ash body, five-piece maple and walnut neck, ebony fingerboard, and two Rockfield MDC5 humbuckers. Its active 3-band EQ, passive mode, coil-splitting, and adjustable bridge suit players who need broad tonal control for stage, studio, and rehearsal use.
- **Ideal For:** It suits professional fretless players seeking a versatile instrument with a 34 in scale, five-string range, ebony fingerboard, dual Rockfield MDC5 humbuckers, coil-splitting, and active 3-band EQ.

### Warwick GPS Thumb BO 4 Fretless
```yaml
product: warwick-gps-thumb-bo-4-fretless
brand: Warwick
price_gbp: 2173.85
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
scale_length: 34 in
body_material: Ovangkol
neck_material: Ovangkol
number_of_strings: 4
fingerboard_material: Wenge
pickup_configuration: 2 active MEC J pickups
```

- **Price:** £2173.85 [^2]
- **Summary:** The Warwick GPS Thumb BO 4 is a German-made four-string bass with an ovangkol bolt-on neck and body, wenge fingerboard, 34 in scale, and active MEC J pickups. Its articulate active electronics and ergonomic Thumb body suit professional studio, stage, and advanced fretless players.
- **Ideal For:** It suits professional-grade fretless bass searches because its 34 in scale, ovangkol construction, wenge fingerboard, and dual active MEC J pickup configuration provide a high-spec platform for precise fretless tone and articulation.
- **Additional Sources:** [^3]

---
## References & Sources
[^1]: Sam Ash, accessed 2026-09-13. https://www.samash.com/michael-kelly-pinnacle-5-string-fretless-bass-guitar-mp5fcpber
[^2]: Bax Music, accessed 2026-09-13. https://www.bax-shop.co.uk/electric-bass-guitars/warwick-gps-thumb-bo-4-natural-transparent-satin-with-gig-bag
[^3]: Andertons Music Co, accessed 2026-09-13. https://www.andertons.co.uk/warwick-gps-thumb-bo-4-in-nirvana-black-transparent-satin/