Product Specifications

POWER

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

CONNECTIVITY & I/O

• Speaker Outputs: 2 × Neutrik Speakon/Jack outputs
• High Instrument Input: Impedance 3.9M Ohms, input range 150mV
• Low Instrument Input: Impedance 10k Ohms, input range 300mV – 405V p-p
• Line Input: Impedance 22k Ohms, input level 0dBu nominal
• DI Output: 420 Ohm balanced, Level 0dBu nominal
• Effects Send: Impedance 22k Ohm, Level 0dBu nominal
• Effects Return: Impedance 22k Ohms, Input Level 0dBu nominal

PERFORMANCE

• Frequency Response: –3dB @ 17Hz and 30kHz
• Signal to Noise: Better than 80dB (EQ flat)
• EQ:
• Bass: ±15dB @ 100Hz
• Lo Mid: ±15dB @ 340Hz
• Middle: ±15dB @ 660Hz
• Hi Mid: ±15dB @ 1.6kHz
• Treble: ±15dB @ 7kHz shelving
• Distortion: Less than 0.5% THD

DIMENSIONS & WEIGHT

• Height: 89 mm
• Width: 311 mm
• Depth: 235 mm
• Net Weight: 2.5 kg

Precision Power for Every Stage

The Rootmaster 500 EVO III delivers a formidable 500 watts of output alongside a wide frequency response and responsive 5-band EQ. It gives bassists full control of their sound, ensuring tone that resonates both on stage and in the studio. Powerful yet lightweight, it's designed to meet the demands of modern players without compromise.

Classic Ashdown Tone, Modern Innovation

Though it marks a new chapter in Ashdown's advancements, the Rootmaster 500 EVO III stays true to the brand's signature analogue warmth. Featuring the Ashdown Sub Harmonic Generator for earth-shaking lows, a built-in Compressor for dynamic control, and Valve Emulated Drive for grit and warmth, it delivers the Swiss army knife versatility that Ashdown amps are known for.

Designed for the Global Player

Built with the gigging bassist in mind, the RM-500 EVO III accommodates power requirements from 115-230V, making it a true globetrotter. Two Neutrik Speakon/Jack outputs ensure solid, roadworthy connectivity, while its frequency response of 17Hz-30kHz captures the entire bass spectrum with unmatched clarity. High/low instrument inputs and a line input make it flexible for a wide variety of basses and sources.

Connectivity That Covers It All

The Rootmaster 500 EVO III provides multiple DI options to fit any live or studio situation. A balanced D.I output delivers pristine signal for front-of-house, while a dedicated tuner output simplifier stage setups. One the rear panel, an XLR DI with post-EQ and post-effects routing ensures your sound is always mix ready, no matter the setup.

Next-Generation Cab Simulation

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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