Lotus JohnH Floor Model 60 Watt Attenuator

The best attenuator circuit ever in my humble opinion is now available in a pedal board friendly format with more control over attenuation levels and a transformer balanced line out for silent recording/practice or send to effects for the ultimate wet/dry setup. 

Attenuation starts at -3.5db and can be stepped down in 1.75db increments all the way down to -33.25db. The 1.75 stage is on the stomp for rhythm/solo boost without changing tone. 

Single input from the amp with a speaker out and transformer balanced line out offer extended flexibility. Use the line out to send directly to the board, effects for a wet/dry setup or re-amp. When attenuation is set greater than -27db the Lotus can be used as a load box for silent recording or practice

Weighing in at 550g (1.2lbs) and a small footprint 120x160mm (4.7x6.3") with all jacks in back is less weight and real estate than two Boss pedals. The enclosure is made from engineering grade carbon/glass fiber thermoplastic that can withstand temps up to 130ºC (266ºF), is incredibly strong, lightweight and chemical resistant. 

Available in 8Ω, 16Ω stock or 2Ω and 4Ω by special order. 

This is a passive device and requires no external power for full operation. The 9V DC jack is optional to run the fan and LED in a steady state.

Specs/Features:
60 Watts Max Input
Reactive Load
Low Profile 5A Switches
Neutrick Jacks
40mm silent fan.
Engineering grade carbon/glass fiber enclosure.
Removable feet for pedal board mounting!
Compact - 120x160mm
Light - 550g

For more details on the operation, and history of this project you can download the manual here. 

Currently 8Ω and 16Ω models are in stock but I expect demand to be high. Any orders placed by December 10 will have it under the holiday tree if you are in the US>  

A portion of each sale is donated to FRC - Team 8248 - Chain Lynx. They build robots that compete against other robots!

This is an open source project. I encourage anyone interested in learning more about this circuit and improving on it to join the discussion on the Marshall forum. The design files for Lotus are open source as well, so far only the schematics have been published, other files available on request.

License: Creative Commons Attribution-Noncommercial. In sum, improve with the project, remix, share, improve. Always give credit and keep it non-commercial.