Ashdown Rootmaster EVO 500W 1 x 12 Bass Amplifier Combo

Product ID: 110937
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  • 500-watt bass amplifier with 12-inch White Line speaker
  • Impressive 5-band EQ for precise signal attenuation
  • Footswitchable Drive and Sub harmonic effects
  • Increased connectivity options via Speakon and XLR outputs
  • Lightweight and rugged design with comfortable carrying handles
  • FX Loop with Send and Return for improved outboard effect control
  • Perfect for gigging and recording
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Delivery to UK mainland addresses* is FREE on orders over £75 and up to 30kg. (As a guide, a standard electric guitar weighs approx. 3-5kg).

Delivery on orders below £75 are charged at £4.45!

Delivery to Northern Ireland, the Scottish Highlands & Islands, Isle of Man, Isle of Wight and Channel Islands is weight dependant and will be indicated at the checkout

Delivery above 30kg to ANY location will vary according to weight and will be indicated at the checkout

LocationPriceStandard Delivery
UK mainland* FREE on orders over £75 £4.45 on orders under £75 1-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands £12.95 – any order value up to 30kg Over 30kg - please call 1-3 working days
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The Ashdown Rootmaster EVO 500W 1 x 12 Bass Amplifier Combo is a powerful combo that is packed with a range of features that raises the bar for professional-level bass amps. Whether you're an amateur or a pro, you're going to want one of the beauties at your disposal either on stage or in the studio.

Raw Ashdown power

The Rootmaster EVO 500W may be delightfully compact in form, but it boasts a marvellous output that can hold its own in the most demanding playing environments. Equipped with Ashdown's Rootmaster EVO series' preamp, there are passive and active input jack sockets to choose from, accommodating bass guitars equipped with active or passive pickups. Ashdown's White Line speaker guarantees that no matter what, the output retains a smooth character. Plus, there is an additional 8-Ohm extension cabinet output, should you need any more power in your arsenal.

Intuitive front panel control layout

Across the front panel, you have a selection of controls that allow you to shape your tone with ease. The top row carries the impressive 5-band EQ section. Intricate signal manipulation is simplified thanks to the excellently calibrated controls. No matter where you're performing, what bass you're playing or playing with, you can use the EQ section to ensure your tone shines through clearly.

The all-new compressor design allows you to attenuate the signal from a tight and clipped response - emphasising each and every note with precision - to a huge, rounded sound with lots of bounce and width. If you're looking to inject a little tube-emulated overdrive into the signal, the Drive control allows you to dial the amount to your heart's content, ranging from subtle sizzle to harsh crackle. Whatever style of music you play you can find a level of overdrive to suit you.

The Sub harmonics section produces sub harmonics an octave below played notes, which can be mixed with the level control of the amp for your perfect blend. The benefit of this is to thicken up your sound and create a fuller-sounding output.


Across the front panel you'll find the Active and Passive instrument inputs. Across the rear panel there are a range of connectivity options for you to play take advantage of, including: Speakon connections, DI Out, FX Loop (Send/Return), FS-2 Out, and Line In.

The FX Loop Send and Return connections allow you to set up external effects pedals free from the pre- and post-amp stages to give you greater control. The D.I. XLR output delivers a balanced signal, perfect if you want to send a feed straight into a mixing desk for recording or monitor mix during a gig. Not only that but a unique Speakon speaker output jack allows you to connect into a live PA desk where an XLR jack isn't available so that all bases are covered. The FS-2 output allows you to manipulate the Drive and Sub Harmonic effects via an external footswitch.

Durable cabinet design

As we've come to expect from the team at Ashdown, the Rootmaster EVO 500W is built to withstand all the abuse that comes with life on the road. The cabinet is built using lightweight ply to reduce weight, without compromising on that signature Ashdown sound - sparing your back when loading in and out of venues, whilst preserving your mighty tone. Encased in Buffalo tolex and employing a black grille cloth, the cabinet achieves a cool yet understated finish. Carrying handles on either side of the cab make it nice and easy to transport.

ModelRootmaster EVO 500W 1 x 12 Bass Amplifier Combo
Dimensions (H x W x D) 476 x 470 x 335 mm
Weight 16.5kg
Output Power500 Watts RMS
Power Handling115 - 230 Volts
Speaker Configuration1 x 12"
Speaker Outputs2 x Speakon
Frequency Response-3db at 17hz and 30khz
High Instrument Input Impedance 3.9M Ohms / Input range 150mv to 20v p-p
Low Instrument InputImpedance -1M Ohms / Input range 150mv to 10v p-p
Line InputImpedance 10k Ohms, Input range 300mV to 40V p-p
DI Output600 Ohm balanced / Level -20dBu nominal
Tuner OutputImpedance 22k Ohms / Level 0dBu nominal
ImpedanceMinimum 4 Ohm
Signal to noiseBetter than 80dB (EQ flat)
EQ Bass +/- 15db @ 100hz
Lo Mid +/- 15db @ 340hz
Mid +/- 15db @ 660hz
Hi Mid +/- 15db @ 1.6Khz
Treble +/- 15db @ 7khz shelving
Effects SendImpedance 22k Ohm / Level 0dBu Nominal
Effects ReturnImpedance 22k Ohm / Level 0dBu Nominal
DistortionLess than 0.5% THD
Connectivity Input, FS-2 Out, FX Send, FX RTN, Line In, Speaker Out, DI Out (XLR)
Controls Input, Comp, Drive, Sub, Bass, 240Hz, Middle, 1K5Hz, Treble, Output, Line Mix, Shape, EQ (In/Out), Comp (In/Out), Drive (In/Out)
Posted on 24/07/2017 by David Cant get over how small and light this amp is yet has no issues holding its own up aginst a spirited drummer etc. Sturdy and well built but very very light. Love it.
Posted on 17/07/2017 by Gav Tons of power and sounds great, more features than I will ever need and I can carry in and out of the gig with an easy one hand lift. Weighs less than half of my old rig! Think I add a cab next but even on its own this is a punchy little combo

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