The Standard is designed for cleaner tones and relies on power tube saturation for its distortion tones, from very clean to vintage style British crunch. It has a unique preamp design that uses 12AX7 tubes to emulate the fatter tone of a 50s-style all-octal-tube preamp.
Input – Volume – Treble –Bass – Mid. – Low High – Power Scale –On/Off – Light
Front Panel Gain select is a two position rotary switch that toggles between low and high gain settings.
This is the amp’s wattage control. This technology was developed by Kevin O’Connor at London Power and is used under License Agreement.
Lower settings produce less wattage.
Higher settings produce more wattage.
AC input – Ultra switch – Foot switch jack - Valve select – Speaker output – Effects loop
Ultra Linear has a smooth warm sound.
The Off position is the standard mode of power amp operation.
Generally lower Power Scale settings sound fuller when the Ultralinear is enabled footswitch jack. Standard stereo ¼ inch connector for controlling effects loop and internal gain boost.
These switches turn the 3 power tubes on or off.
A variety of power tube combinations are possible with the 20 watt amplifier. Any of the tubes can be turned on or off, of course all turned to the off position produces no sound.
The tube on the left is a EL84 and is enabled with the EL84 switch.
The two octal tube sockets can accommodate several tube types and are enabled by switches V-2 and V-3. The tube types that can be used are: 6V6, 6L6, 5881, 6CA7, EL34, and KT77.
This is the speaker output section.
The impedance selector is labelled 1- 2 -3 because any setting can be used with a 4ohm 8ohm or 16ohm speaker cabinet.
Use the setting that you like the best. When using different output tube combinations, listen to the different impedance settings to see what one you like best.
This effects loop is a 6SN7 tube driven parallel type with variable send and receive levels that will accommodate both pedals and rack gear.
This loop is based on a design by Kevin O’Connor of London Power, I’ve been using it for many years now and it just works great.
The Standard is priced at $3000
All prices are in USD and do not include shipping or taxes. There is an approximate 6 month backlog at this time. A $1500 deposit is required to get on the amplifier build list, the balance is then due when the amplifier is ready to ship.
Stephenson Amplification Inc.
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