Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated .

Sweetwater
5.0 (2)
$799.00
Guitar Center
5.0 (2)
$799.00
Reverb
$498.56 New
$679.99 Used

Average Price: $729

Standard/Professional

$200

$801+

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Price History

Based on price data from 3 merchants for "Ashdown Engineering RM-500 EVO III Rootmaster 500-Watt Bass Amp Head". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Elevate your bass game with the Ashdown RM-500 EVO III Rootmaster, a powerhouse in a compact form. This 500-watt bass amp head is designed for versatility, making it an ideal choice for the gigging musician in search of dynamic sound and reliability. Its 5-band EQ offers precise control over your tonal spectrum, allowing you to tailor your sound with surgical accuracy. Whether you're laying down tracks in the studio or shaking the stage live, the RM-500 EVO III empowers you with a robust suite of features.

The amp's Sub Harmonic Generator adds depth, enriching your low-end frequencies to room-shaking levels, while the built-in compressor ensures your sound remains smooth and consistent. For those craving a vintage vibe, the valve-emulated drive injects a touch of warmth and grit. Additionally, the amp's Analog Cab Sim DI output gives you the flexibility to connect directly to PA systems or recording interfaces, emulating the sound of a classic Ashdown ABM cabinet for that authentic tone.

Designed with the road in mind, this amp is as durable as it is portable. Its lightweight build makes it a breeze to transport, and Ashdown's commitment to sustainability ensures that replacement components will be available for years to come, minimizing waste and extending the life of your gear.

Key Features:

  • 500 watts of bass power
  • 5-band EQ for detailed tone shaping
  • Sub Harmonic Generator and built-in compressor
  • Valve-emulated drive for added warmth
  • Analog Cab Sim DI and balanced D.I. outputs
  • Lightweight and durable design for easy transport
  • Environmentally sustainable with long-term component support

Product specs

Type Solid State
Number of Channels Single channel
Output Power 500W
Effects Valve-emulated Drive, Sub Harmonic Generator
Compression Yes
EQ 5-band EQ, Shape switch
Amp Modeling Speaker Sim
Inputs 1 x 1/4" (instrument), 1 x 1/4" (line)
Outputs 2 x SpeakON (4 ohms), 1 x XLR (Cab Sim DI out)
Headphones 1 x 1/4"
Effects Loop Yes
Footswitch I/O 1 x 1/4" (drive, subharmonic generator)
Footswitch Included No
Cooling System Internal Fan, Rear/Side Air Vents
Power Source Standard IEC power supply

FAQs

What type of power does the Ashdown RM-500 EVO III Rootmaster Bass Amp Head provide?

The Ashdown RM-500 EVO III provides 500 watts of power, making it suitable for both practice and live performances, offering dynamic sound with plenty of headroom for various playing environments.

Does the Ashdown RM-500 EVO III include any built-in effects?

Yes, it features a valve-emulated drive and a Sub Harmonic Generator for enhanced tone shaping, as well as a 5-band EQ for precise sound control.

How does the Ashdown RM-500 EVO III handle connectivity for live and recording situations?

It offers multiple output options including two SpeakON outputs for speakers and an XLR output with a cab simulation for direct recording or live performance.

Is the Ashdown RM-500 EVO III suitable for use with effects pedals?

Yes, it includes an effects loop that allows you to integrate your effects pedals seamlessly into your setup.

What are the cooling features of the Ashdown RM-500 EVO III?

The amp head is equipped with an internal fan and rear/side air vents to ensure efficient cooling during extended use, maintaining optimal performance.

Jonny Dibble

Jonny Dibble

EVERY Bass Amp Should Have This Feature... | Ashdown Rootmaster EVO III [Review/Demo]

Video thumbnail for EVERY Bass Amp Should Have This Feature... | Ashdown Rootmaster EVO III [Review/Demo] by Jonny Dibble

EVERY Bass Amp Should Have This Feature... | Ashdown Rootmaster EVO III [Review/Demo]

Jonny Dibble

Jonny Dibble

Video thumbnail for The ONLY bass amp you need?! Ashdown EVOIII Rootmaster [Review/Demo] by ThatGuyOnBass

The ONLY bass amp you need?! Ashdown EVOIII Rootmaster [Review/Demo]

ThatGuyOnBass

ThatGuyOnBass

Video thumbnail for Ashdown RM EVO III 500 Rootmaster | NAMM 2025 by Premier Guitar

Ashdown RM EVO III 500 Rootmaster | NAMM 2025

Premier Guitar

Premier Guitar

Video thumbnail for Ashdown Rootmaster Evo III 500 Review by Matt Parker

Ashdown Rootmaster Evo III 500 Review

Matt Parker

Matt Parker

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Ashdown Engineering RM-500 EVO III Rootmaster 500-Watt Bass Amp Head.

Comparisons

  • The Ashdown sound differs significantly from Aguilar, with Aguilar known for its robust DI quality, comparable to a J48 DI box.

    Source

Features and functionality

  • The Aguilar Tone Hammer lacks separate volume control for DI out, which is tied to the main volume, potentially complicating live sound adjustments.

    Source
  • Some users appreciate Ashdown’s ability to toggle tube settings for added dirt, offering more tonal flexibility.

    Source
  • The RM500 is noted for being a "brilliant class D head," standing out by sounding less like a typical Class D amp.

    Source

Use cases and applications

  • The Aguilar Tone Hammer head has proven reliable through extensive use over several years and various conditions, including travel and rough handling.

    Source
  • The RM500 is capable of holding its own in a loud band setting, even with demanding setups like dual-amp guitarists.

    Source

User experience

  • Owners report the RM500 EVO2 head receives consistent praise from fellow bass players for its performance in both gigging and recording contexts.

    Source
  • An owner highlighted the RM500's reliability, having gigged it in diverse venues, including prestigious ones like the Royal Albert Hall.

    Source
  • Ashdown's customer service is highly praised for their willingness to repair out-of-warranty products, only charging for postage.

    Source

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