UK-OBM-500
UK-OBM-500
UK-OBM-500

Ashdown Engineering

UK-OBM-500

£499.00

Please note: All UK-built products are made to order. The approximate lead time is 20 days.

For more information, please email: info@ashdownmusic.co.uk

The Ashdown UK-OBM-500 is a UK-built, ultra-compact 500-watt bass head finished in striking Ice Blue. Lightweight and powerful, it features a versatile 5-band EQ, classic Pre-Shape tone contour, FX Loop, DI Output, and auto-voltage operation for worldwide gigging. A clean, punchy, no-nonsense amp built for players who want reliability and great tone in the smallest possible format

Pairs well with

Ships within 1-2 business days (UK Customer Orders Only)

5 Year Warranty

Engineered to Last, Trusted by the Best

Product Specifications

POWER

• Power Output: 500 Watts
• Power Requirements: 115–230 Volts
• Impedance: Minimum 4 Ohms

CONNECTIVITY & I/O

• Speaker Outputs: 2 × Jack outputs
• High Instrument Input: Impedance 3.9M Ohms, input range 150mV – 20V p-p
• Low Instrument Input: Impedance 1M Ohms, input range 150mV – 10V p-p
• Line Input: Impedance 10k Ohms, input range 300mV – 40V p-p
• DI Output: 600 Ohm balanced, Level –20dBu nominal
• Effects Send: Impedance 22k Ohm, Level 0dBu nominal
• Effects Return: Impedance 22k Ohms, Input Level 0dBu nominal

PERFORMANCE

• Frequency Response: –3dB @ 22Hz and 25kHz
• Signal to Noise: Better than 80dB (EQ flat)
• EQ:
• Bass: ±15dB @ 100Hz
• Lo Mid: ±15dB @ 220Hz
• Middle: ±15dB @ 660Hz
• Hi Mid: ±15dB @ 1.6kHz
• Treble: ±15dB @ 7kHz shelving
• Distortion: Less than 0.5% THD

DIMENSIONS & WEIGHT

• Height: 89 mm
• Width: 220 mm
• Depth: 209 mm
• Net Weight: 1.8 kg

Original Reimagined in the UK

The Ashdown UK-OBM-500 is the latest step forward in the OriginAL EVO lineage, now hand-built in the UK and finished in striking Ice Blue. Delivering 500 watts of clean, dependable power, this compact head is designed for bassists who want a non-nonsense amplifier that performs confidently in any setting, while remaining exceptionally lightweight and portable.

Powerful Output, Compact Design

Despite its ultra-compact footprint, the UK-OBM-500 offers commanding headroom and consistent performance that comfortably exceeds expectations for its size. Its efficient design makes it easy to transport while retaining the authority and clarity required for rehearsals, live performance, and studio use alike.

Intuitive Tone Shaping

Tone shaping is handled by a responsive 5-band EQ, giving precise control across the frequency spectrum without unnecessary complexity. For instant tonal shaping, the familiar Pre-Shape switch provides a refined contour that enhances low-end punch, clarity, and presence - ideal for achieving a polished, mix-ready sound at the touch of a button.

Essential Connectivity, Global Readiness

A clean DI output ensures reliable signal delivery for front-of-house and recording applications, while the FX Loop allows seamless integration of external pedals and processors. Auto-voltage operation enables safe and consistent use worldwide, making the UK-OBM-500 a dependable companion for travelling musicians.

Built to last, designed to perform

User

manual

CLICK THE IMAGE ABOVE TO DOWNLOAD THE USER MANUAL

FAQs

Please read our FAQs page to find out more.

How Long Will My Order Take To Arrive?

Orders placed before 3pm (Monday-Thursday) are dispatched on the same day. UK Customer orders are shipped on a next-day delivery service via TNT.

Do You Shop To Outside Of The UK?

Currently, we do not facilitate orders to outside of the UK. If there is a specific product that you are after, be sure to check our Dealer Locator to find your closest Ashdown dealer!

If you cannot find a local dealer, please do not hesitate to get in touch and we will try and assist!

Do Ashdown Products Come With A Warranty?

Yes! All Ashdown product purchased include a 5 year warranty, giving you peace of mind and long-term support.

For more information on warranties, visit our Warranty Info page!

Where Can I Buy Ashdown Spares and Accessories?

Spare parts, footswitches, and accessories can be purchased directly through our in-house service team. If you're looking for something specific, our team will be happy to point you in the right direction!

How Can I Contact Ashdown Support?

Our passionate UK-based team is always ready to help. You can get in touch by phone or email, and we'll be happy to assist with any questions.

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