Ashdown 12-band 600
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Manufacturer Information
Ashdown
https://www.ashdownmusic.com
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Safety manager:
Algam SAS
Email: contact@algam.net
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The Return of an Ashdown Classic: The Spirit of the 12-Band (formerly MK-500)
Long requested, the 12-Band 600 marks the reintroduction of a format that has become iconic at Ashdown, formerly known as the MK-500. The concept remains true to the series' DNA: a "vintage" preamp in its philosophy (deliberately direct signal path, immediate efficiency), but with formidable sound-sculpting capability thanks to the famous 12-band EQ popularized on stage. This "minimalist but surgical" approach primarily aims for signal integrity and high fidelity designed for bass, with real flexibility to adapt the amp to your instrument, pickups, and cabinet.
For Which Bassist and Situations?
The Ashdown Engineering 12-Band 600 is aimed at bassists who want total control over the spectrum without dealing with a complicated menu system. It suits both intermediate musicians seeking a clean, controlled sound and experienced players who know their frequencies and want to instantly dial in "their curve." In rehearsal, it handles sustained volumes while remaining clear in the mix; on stage, the symmetrical DI (pre or post EQ) facilitates working with the front of house; in the studio, the 12-band EQ and VU meter help finely tune gain and tonal balance. Style-wise, it excels whenever definition and attack are needed (funk, pop, gospel, modern rock), while remaining relevant for rounder, denser tones thanks to the precision of the equalization.
Technical specifications
| Effects | Octaver / Harmony, EQ | Category | Amplifier |
| Category | Bass amp head | Number of effects | 1 |
| Technology | Solid state | Number of channels | 1 |
| Input | jack, effect loop jack, Balanced XLR | EQ | 12-band |
| Output | XLR DI, Tuner jack, Cabinet speakon, Line out jack, 4 Ω cabinet jack | Headphone output | No |
| Effects loop | Yes | Color | Blue |
| Footswitch input | No | Power output | 600 W |
| Pre-amp tubes | 12AX7 | Weight | 12.3 kg |
| Attenuator | No | Dimensions (mm) | 385 x 315 x 90 |
Questions frequently asked
What power does the Ashdown 12-Band 600 deliver?
This amp head delivers 600 W and accepts a minimum impedance of 4 ohms per channel.
Does the 12-band EQ allow for precise bass sound adjustment?
The 12-band graphic EQ enables fine tuning across the spectrum to correct room acoustics or adjust the response to a speaker cabinet. The preamp also features a 12AX7 tube and a Harmonic Emphasis circuit to enhance harmonics and presence in the highs.
What connections are available for cabinets and PA?
Four speaker outputs are available via Speakon and 6.35 mm jack connectors. A balanced DI XLR output, switchable pre or post-EQ, allows connection to the mixing desk. A line out jack output is also present.
Can effect pedals be connected to this Ashdown head?
An effects loop on jack connectors is integrated, with send and return at a nominal level of 0 dBu and an impedance of 22 kOhms.
Does this head have a tuner output with mute?
The tuner output on jack includes a mute switch, allowing tuning without sending signal to the PA.



