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Ashdown Rootmaster EVO 500 Bass Amplifier Head


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  • Compact yet powerful 500-watt bass guitar amplifier head
  • Footswitchable Drive and Sub effect channels
  • Speakon and XLR outputs for direct connection to a PA and speaker systems
  • Lightweight and rugged design, ideal for the gigging bassist
  • One-knob compression system for easy shift of tonal character
  • 5-band EQ to allow extensive signal sculpture
  • Drive capability for hot, fuzzy tones on demand
  • FX send and return capability to work with your pedal rig
  • Line in to connect any audio source for playback through the output of the amp
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Delivery & Returns

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, Channel Islands and the Republic of Ireland. 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 £751-3 working days
Northern Ireland, Scottish Highlands & Islands Isle of Man Isle of Wight Channel Islands Republic of Ireland£12.95 – any order value up to 30kg Over 30kg - please call1-3 working days
OverseasPlease call for detailsPlease call

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The crew at Ashdown have done it again, delivering a superb range of bass amp heads that will blow you away with their tonal versatility, rugged design and incredible raw power! Ashdown spent a considerable length of time consulting with professional musicians to perfect these models, and you can rest assured that whatever style of music you play, the new Rootmaster EVO range has something to meet everyone's demands.

Power and precision on demand

The Rootmaster EVO 500 bass amp head is a working bassist's dream. Built to withstand the rigours of the road and carrying it off with effortless style, the new lightweight and slimline enclosure houses a tonal powerhouse that is desperate to be explored.

The front panel is home to an impressive array of controls that put a huge amount of power at your fingertips. At your disposal is an intricately designed 5-band EQ section that allows you to sculpt and craft your tone to suit the bass guitar you're playing, the environment you're playing in and to fit perfectly alongside the other musicians you're playing with.

Intuitive controls as standard

The simple one-knob compression system allows you to squeeze your signal to get a tightly clipped and snappy response, or a thick, saturated rumble with an incredibly warm tone. The Drive control gives a sweetly overdriven tube-emulated sizzle that can inject a little grit into your signal or full on hot overdrive.

The FS-2 output allows you to control the Drive and Sub Harmonic effects via an external optional footswitch, giving you greater freedom in how you control the amp. effects

The Class-D power section runs highly efficiently, which also contributes to the lower weight of the overall head and allows it run cool in any environment meaning you get more musical volume whilst using less power.

Send and return capability

The rear panel is home to the FX Loop Send and Return connections, allowing you to set up external effects pedals free from the pre and post amp stages to give you greater control over the exact effects you want to use.

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 a live sound desk during a gig. Not only that but a unique Speak On 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 Ashdown Rootmaster EVO 500 is testimony to what this legendary company can create and you are guaranteed a consistent standard of excellence with this compact yet feature-rich head unit.

ModelRootmaster EVO 500 Bass Amplifier Head
Dimensions (H x W x D) 86 x 314 x 235mm
Weight 4kg
Output Power500 Watts RMS
Power Handling115 - 230 Volts
Speaker Outputs2 x Speakon
Frequency Response-3db at 17hz and 30khz
High Instrument Input Impedance - 3.9M Ohm Input range 150mv to 20v p - p
Low Instrument InputImpedance - 1M Ohm Input range 150mv to 40v p - p
Line InputImpedance 10k Ohms, input range 300mV - 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)
EQBass +/- 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)
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