Deluxe AMPLIFIER

Power Scale

  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.

Gain Mode Switch

• switch in the up position produces more gain and more mids from the preamp.
• switch in the down position is cleaner tone, great when using booster pedals for the OD tone

Bright Switch 

•  switch in up position produces the brightest tones 
•  switch in middle position is flat
•  switch in down position is sparkle boost

Gain Potentiometer

•  Controls preamp gain. This control used with the bright and gain mode switches, can dial in clean and punchy to saturated distorted tones. 

EQ Controls

• Treble
• Bass
• Mid Potentiometers

 Drive
The Drive works together with the power Scale control to keep the amps tone at any wattage. In other words cranked tone at any volume. When the Scale is set to maximum the power amp produces full wattage, any other Scale setting will produce less than full wattage. Scale set to minimum is the amps standby mode. The Drive control determines the amount of saturation and compression that the power amp produces. As the amp is Scaled down the Drive should also be turned down to keep the amps natural full volume tone. A good rule of thumb is: adjust the Drive and Scale controls together. In other words: if you adjust one, then adjust the other to dial in the best tone. Of coarse there are no right or wrong settings, dial these controls in to achieve the tone your looking for. Simply keep these points in mind:-High drive settings and low scale settings will produce a saturated/compressed tone.-Low drive settings and high scale settings will produce the cleanest tone.

Cut Switch

The Cut switch works in conjunction with the Drive control. With the Cut ON (switch in the Up position) there are less highs and upper mids. To keep the tone more focused and the bottom tighter, keep the Cut Off (switch in the Down position) and the Drive dialed back.

FAT

 Feedback Attenuation – controls the amount of negative feedback that is employed in the power amp. Negative feedback is a common guitar amplifier method to control the tightness and gain of the power amp. Too much negative feedback can cause a thin constricted sounding amp and too little can cause a bloated sounding amp. With the Fat set to minimum a great deal of negative feedback is employed, which keeps the power amp tight with less body and gain. With the Fat set to maximum the power amp is running open loop (no negative feedback), for maximum gain, body and wattage from the power amp. 

 AC input – Ultra switch – Foot switch jack - Valve select – Speaker output – Effects loop

Ultralinear Switch

• 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

Foot Switch Jack

 Standard stereo ¼ inch connector for controlling effects loop and internal gain boost 

Power and Tubes

•   Power Amp Valve Select
• 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.

Speaker Output Section

The impedance selector is labeled 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.

Effects Loop

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 find it to be about the best there is. 

• Custom made in Canada Toroidal power transformer for low noise operation
• Custom made in Canada toroidal output transformer for full bodied tone
• Aluminum chassis
• Two 12AX7 tubes in preamp
• One 6SN7 tube in effects loop
• One 6SN7 tube for phase inverter
• Three tube power amp. Single EL84 blended with two octal tubes (6V6 etc.)

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.