Bass Amplification

RM-500-EVO 500w Rootmaster Head

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RM-500-EVO

Front view - Click to enlarge [+]

Now in its second evolution is the RM-500. The 500-watt power section of the RM500 EVO has been developed to maintain a deep low end, defined mids and transient highs delivering its output into a 4-ohm load. Ashdown Rootmaster heads are the perfect choice for working bassists looking for power and features without the weight.

The Rootmaster EVO series’ pre amp now includes a passive and active input jack socket for use with high and low output instruments, this sets a clear signal path to the input control enabling you to fine tune your input level using the trademark Ashdown VU meter. With the signal at its optimal level, you then hit the rich features designed enhance your tone, such as the shape button, 5-band EQ and on-board compressor. The drive control, as always delivers a delectable valve emulated over-drive, whilst the sub harmonic controls add further fatness to your tone - both can be foot-switched via an FS 2 footswitch (sold separately).

Rootmaster EVO heads also feature an upgraded power section plus a handy mute button. What’s even cooler is when switched to mute, the trademark Ashdown Engineering VU meter changes from orange to cool blue – creating the perfect on stage mood lighting between sets.

Simple, powerful EQ
The Rootmaster EVO series’ pre amp now includes a passive and active input jack socket for use with high and low output instruments. The five- band rotary tone controls act with surgical precision to provide total control over your sound, while a shape switch instantly dials you in to a classic Ashdown tone setting, straight from the world-famous ABM.

One-knob Compression

Instantly adding warmth and body to your tone, this simple to use, great sounding compressor delivers a powerful, even sound to make sure your bass will fill out any mix.

Footswitchable variable overdrive
With footswitchable flexibility, our tube-emulated overdrive can take your core bass sound and push it into warm overdrive through to distorted filth whenever you need to add extra grind and girth to your tone.

Kick it down
Bringing extra depth and definition to your bass parts, the Sub-Harmonic Generator lets you dial in a sub-octave and kick it in via footswitch whenever you need the extra depth for those super-heavy Godzilla moments.

Totally connected
If you want to use your favourite pedals or multi-effects, you’ll find send and return sockets on the back panel, along with a DI output for direct injection into the PA mixer or recording console and a Line Input (with front panel level control) so you can jam along with a backing track in rehearsal.

Create the perfect rig
A combined Jack/Speakon socket with a minimum 4 ohm load provides flexible partnering options with a dedicated range of Rootmaster EVO cabinets. Ashdown’s 1 x 12”, 1 x 15”, 2 x 10” and 6 x 10” cabs all feature Ashdown White Line speakers for a refined tone, plus a high- frequency 3-way controllable tweeter for additional top-end bite.

RM-500-EVO Specifications

Power Output 500 Watts
Power Requirement 115 - 230 Volts
Speaker Outputs 2 x Speakon
Frequency Response -3dB at 17Hz and 30kHz
High Instrument Input Impedance 3.9m Ohms, input range 150mV - 20mV p-p
Low Instrument Input Impedance - 1M ohms Input range 150mv to 10v p - p
Line Input Impedance 10k Ohms, input range 300mV - 40V p-p
DI Output 600 Ohm balanced / Level -20dBu nominal
Tuner Output Impedance 22k Ohms / Level 0dBu nominal
Impedance Minimum 4 Ohm
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 Deep +
Effects Send impedance 22k Ohm / Level 0dBu nominal
Effects Return impedance 22k Ohm / Level 0dBu nominal
Distortion Less than 0.5% THD
H x W x D (mm) 86 x 314 x 235
Notch Filter 5