Here she is
http://cgi.ebay.co.uk/RAT-HOTROD-MARSHA ... 51973a07da
This Amp has been 'RAT' Hot Rodded
http://www.ratvalveamps.com
This is a Superb Little Marshall Amp with a Factory Custom 'White' Tolex and 'Cane' Speaker Grille Finish. The Original Old Style, Plexiglass 'MARSHALL' Badge is also a Nice touch.
The Amp is an All Valve, Class A, Single Ended, 5 Watt Design. Rather than just copy an Existing Circuit from one of the Recent Flood of 5 Watt Valve Amps, Marshall has gone the extra Mile and produced an Original Design Amp with NONE of the Usual Faults. There is NO Heater 'Buzz' - NO Circuit 'HUM' - It uses a Nice 3 Stage Gain Design, again, without a Ton of 'HISS'. Limited 'Clean' Headroom, but Loads of Great Marshall 'Crunch'. The Build Quality is Good and the Amp Looks and Sounds Fantastic.
On the Test Bench the Amp is Producing 6.4 Watts RMS and about 10 Watts Peak Power into 16 Ohms. The Speaker is a Custom Spec Celestion 10", 15 Watt, 16 Ohm Driver. The Only Problem I can find with the Amp is that you have to run it FLAT-OUT to get the 'Classic' Marshall Sound, then it's too Loud for Home Use......RAT 'OPR' sorts that out......
There is always Room for Improvement and I have added some Choice Extras-
- Additional 'RAT' Features -
1. - 'OPR' - Output Power Reduction.
http://www.ratvalveamps.com/power-scaling
'OPR' lets you get a true 'Cranked Amp Sound' at VERY Low Volume Levels - Fat Harmonics - Sustain a Mile Long - the Full Works, but at a Volume level you can 'Talk' over. Simple to use, Just like a Normal Volume Control, but as you 'Dial Down the Power' - The Volume Drops but the Tone is Maintained. The Output Power of the Amplifier can be Varied from 100% down to Less than 1% of the Full Rating - Fully Maintaining the Warm Tone and Natural Harmonics of the Output Valve. Waste Heat from the Output Stage is Dramatically reduced as the Power is Dialled down, Greatly Extending Valve Life.
2. - Variable Boost Footswitch - A Boost Footswitch with a Built-In Gain Control. The Footswitch Connects to the Back of the Amp and you can set Just how much Gain you want with A Rotary Control located near the Push-Button On/Off Switch. It Works Great and Gives you that extra 'Kick' when Needed. A Red LED Illuminates when 'Boost' is Selected. There is a Trade-off when using the Variable Boost. The Higher the Boost is set - the Less Effective the Tone Controls Are. In Practice this is not a Problem because at 'Full Boost' the Tone Network is 'Flat' and allows the 'Mids' to Cut Through Nicely.
3. Master Volume Control - Allows Preamp Overdrive -or- Power Amp Overdrive -or- Both.
4. - 3x Bias Switch - This Control changes the Preamp Valve Bias to one of 3 settings -
A. - 'Up' Position is 'Sharp and Bright' with Reduced Bass Response.
B. - Centre Position is 'Clean and Mellow'.
C. - 'Down' Position is Factory Standard.
5. - Modified 'Tone Stack' - The Factory Tone Controls do not allow total Tone Control. The Modified Treble, Middle and Bass controls now Sweep from 'Zero-to-Max' on each Frequency.
6. - All Amps that pass through the 'RAT' Workshop are 'PAT' Approved -
http://www.ratvalveamps.com/pat-approval
- And Finally -
A few words about 'OPR' (Output Power Reduction) - The Primary Purpose of 'OPR' is to give you access to the Sound of 'Output Valve Distortion' at Reduced Volume Levels. 'OPR' will do Little or Nothing until the Output Valve is being Driven Hard and Producing 'Harmonic Distortion' - Then, it Rules!!
This is a Superb Amplifier and you WILL be Delighted with it's Performance - If not, I will give you your Money Back.
