Ashdown UK-CTM-300 | 300W All-Valve Bass Amp Head | UK-Built

Hand-built in the UK. 300 watts of pure valve authority.

Please note that this amp no longer comes with "chicken head knobs" photos do not depict the knob types as of June 2026.  Photos will be updated when they become available.

The Ashdown UK-CTM-300 is built by hand in the Ashdown Custom Shop in England — not a factory floor, not an overseas facility. Every unit is small-batch production, assembled by craftspeople who know what serious bass players need. If UK provenance and all-valve performance matter to you, this is the amp head you've been looking for.

⚠ Custom Order — Made to Order in the UK
This is a custom-order product. Lead time is approximately 1 month from date of order. Order now to reserve your build slot, or contact us at info@ecgmusic.com for real-time availability, current lead times, and configuration options.

Powered by a five-valve preamp and six KT88 output tubes, the CTM-300 delivers 300 watts of headroom-rich, touch-sensitive tube power. Whether you're tracking in the studio, playing a large venue, or building a boutique rig that will last decades, this amp responds the way only a true all-valve head can — with warmth, depth, and dynamic feel that solid-state simply cannot replicate.

The tone stack is built around a classic passive EQ paired with Deep, Mid Shift, and Bright voicing switches, giving you a wide range of tonal territory from smooth vintage warmth to punchy, cutting modern bass. The Mellow function lets you move between clean character and full valve-driven growl at the push of a button.

For working players, the CTM-300 is built for real-world use: user-adjustable bias per power tube, a tube-driven transformer-derived DI, a tube-driven front-mounted effects loop, and a front-panel VU meter that doubles as a bias guide and fault indicator. The cabinet is constructed from 18mm marine-grade birch ply with heavy-duty handles and internal cooling — built to tour.

Why the UK-CTM-300

• UK-built in the Ashdown Custom Shop — hand-assembled, small batch
• 300W all-valve output via six KT88 power tubes
• Five-valve preamp for rich harmonic character at every volume
• Classic passive EQ with Deep, Mid Shift, Bright, and Mellow voicing
• Tube-driven DI (transformer-derived) and tube-driven effects loop
• Per-tube user-adjustable bias with front-panel VU meter
• 18mm marine-grade birch ply cabinet — built for stage and studio

The Ashdown UK-CTM-300 is the kind of amp head you build a rig around — and keep for life. Contact ECG Music to place your order or ask about current availability.