Here we have a Very Good condition California Audio Labs SIGMA II Tube Analog Processor Instruction manual in sleeve. Item will be packed so that you receive it in great condition. Shipping is only $3.50 to U.S. only please.Thanks for looking!

California Audio Labs Sigma II Tube Analog Processor DAC Used. Tested. Sounds great. Good cosmetic condition. Has Sovtek 12AX7 installed (see pictures). Includes power cord. The Sigma II has a full warm analog sound, particularly in the lower frequencies. It’s hard to beat the sound quality for price. It is meant to be kept powered on, as it has a recommended warm up time of 30 minutes. There is a power switch on back panel. It has 2 inputs, coaxial and optical, with the input selector switch on the back panel. It has an auto on signal detect, LED light turns on when a signal is present. Depending on your input source (I have used only CD players/transports), mechanical sounds (varies depending on source) from actuating relays may be briefly heard from chassis (not speakers) only for couple seconds when connected source is first powered on. There is a brief delay, depending on source and input being used, before the Sigma begins processing signal after it’s been detected. This is normal behavior.

Blows the fuse as soon as I turn it on for parts, not working. No return no warranty.

Sigma ii Tube Analog Processor. Tube is fine, unit works perfect, led is only issue. The led on front is burnt out. Unit Tested, and everything works still. 4th pic is tube in unitGolden Dragon Tube inside Ecc83-01

CALIFORNIA AUDIO LABS TUBE DAC ANALOG PROCESSOR SIGMA II D/A CONVERTER. I have this unit set up with my cd player with an optical output. This works very well. I have no means of testing the digital input. Original factory packing should be a big help in a damage free shipping. It is in fantastic physical condition. No scratches. I removed the cover to check out the tube. Its a 12 AX7 I believe. I will include the power cord that came with it.

CALIFORNIA AUDIO LABS TUBE DAC ANALOG PROCESSOR SIGMA II D/A CONVERTER. I have this unit set up with my cd player with an optical output. This works very well. I have no means of testing the digital input. Original factory packing should be a big help in a damage free shipping. It is in fantastic physical condition. No scratches. I removed the cover to check out the tube. Its a 12 AX7 I believe. I will include the power cord that came with it.

CALIFORNIA AUDIO LABS TUBE DAC ANALOG PROCESSOR SIGMA II D/A CONVERTER. I have no way of testing this device and so I must list it for parts or not working. Original factory packing should be a big help in a damage free shipping. It is in fantastic physical condition. No scratches. I removed the cover to check out the tube. Its a 12 AX7 I believe. I will include the power cord that came with it.

Plug and Play CALIFORNIA AUDIO LABS TUBE ANALOG PROCESSOR SIGMA II. It came with Sylvania 12au7 and Sovtek 12ax7. The 12au7 provide more mellow, laid back musics. Shipping in conus only for $60 with 30 days return, return shipping paid by the buyer. The returned item must be in the condition as received

Plug and Play CALIFORNIA AUDIO LABS TUBE ANALOG PROCESSOR SIGMA II. It came with Sylvania 12au7 and Sovtek 12ax7. The 12au7 provide more mellow, laid back musics. Shipping in conus only for $60 with 30 days return, return shipping paid by the buyer. The returned item must be in the condition as received

Plug and Play CALIFORNIA AUDIO LABS TUBE ANALOG PROCESSOR SIGMA II. It came with Sylvania 12au7 and Sovtek 12ax7. The 12au7 provide more mellow, laid back musics. Shipping in conus only for $60 with 30 days return, return shipping paid by the buyer.