⭕ This is a BA-6C, a late version of this model. The main difference from the earlier versions appear to be cosmetic. The C does not use the plug-in capacitors like the earlier model and is silver gray metallic rather than umber gray. It appears to be in amazingly good operating condition, as verified by our measurements.

Hz 3dB Below Threshold of compression

20 -1.0 .7% THD

50 +0.0 .06% THD

100 +0.0 .06% THD

1000 +.2 / .06% THD

5000 +.2 / .06% THD

10000 +.2 / .08% THD

15000 +.2 / .08% THD

20000 +.2 / .15% THD

30000 -.8 / .2% THD

40000 -3.4 / .2% THD



@10dB Compression

2.2% THD

1.2% THD

0.7% THD

0.9% THD

0.07% THD

0.11% THD

0.14% THD

0.17% THD

0.30% THD Measured with Sound Technology Model 1710A Distortion Measurement System Noise: 70dB Below Threshold of Compression In picture 1 & 2

Disclosure: Needs A Pair Of Lamps In the Meter (if you want it illuminated) There Are A Few Spots Of Rust On The Chassis. The Front Panel Has Been Refinished Due To Some Rust, But The Rack Shelf Is Brand New(old Stock) The Pin Of The Rectifier Tube Is Broken Off. You also receive A Copy Of The BA 6A Book.

Please e-mail with any questions. Thank you for looking