Ashdown OBM 500w
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- This item is covered for 3 years
Essential Information About the Ashdown UK-OBM-500 Amp
Essential Information About the Ashdown UK-OBM-500 Amp
- 500 W in an ultra-compact chassis weighing 2 kg, ideal for rehearsal, stage, and touring.
- 5-band equalizer + "Pre-Shape" circuit to instantly sculpt a mix-ready sound.
- Comprehensive connectivity: DI output, effects loop, speaker outputs, 6.35mm Jack headphone socket.
- Made in the UK with automatic voltage management for travel.
Manufacturer Information
Ashdown
https://www.ashdownmusic.com
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Safety manager:
Algam SAS
Email: contact@algam.net
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Historical Context and Positioning in the Range
Derived from Ashdown's EVO platform heritage, the UK-OBM-500 condenses the brand's "plug-and-play" approach into a modern glacier blue format. Manufactured in the UK, this head emphasizes robustness, simplicity, and immediate power, with ergonomics designed for bassists demanding mobility.
Who This Amp Is For
Perfect for the bassist alternating between home studio, rehearsals, and gigs, the UK-OBM-500 offers enough headroom for medium-sized venues while remaining discreet in a bag. Its wide tonal palette suits rock, pop, funk, soul, and modern metal, and its clean character makes it an excellent foundation for drive and modulation pedals.
Technical specifications
| Category | Bass amp head | EQ | 5 channels |
| Technology | Solid state | Headphone output | Jack 6.35 |
| Input | instrument jack | Color | Blue |
| Output | XLR DI, Cabinet 2 x jack | Power output | 500 W |
| External cabinet output | Yes | Weight | 2 kg |
| Effects loop | Yes | Dimensions (mm) | 89 x 220 x 209 |
Questions frequently asked
What power does the Ashdown OBM 500w head deliver?
This transistor head delivers 500 W, with a reserve suitable for rehearsals and medium-sized stage performances.
What speakers can be connected to this bass head?
Two 6.35 mm jack speaker outputs are provided for connecting external cabinets. The provided information does not specify the minimum admissible impedance.
Does the DI output allow connection to a mixing console?
The XLR DI output provides a direct signal intended for the front of house or recording. An effects loop is also available to integrate external pedals.
What sound adjustment does the OBM 500 offer?
The 5-band equalizer allows precise adjustment of the sound spectrum. The Shape/Pre-Shape switch applies a modern voicing to the sculpted mids. The active/passive selector adapts the input level of the 6.35 mm jack to the bass used.
Is it easy to transport for rehearsals?
Weighing 2 kg and measuring 89 x 220 x 209 mm, this head has a compact format. Its UK manufacturing and automatic voltage management complete its mobility-oriented design.



