Took a pic of the pre amps in my L2Ks. Quite a difference in looks and other things as well.
Blackburst:
Tobacco burst:
The most noticeable difference is the IC chips. The Blackburst uses a TL061CP instead of the LF441CN. To my ears, the LF is louder... more raw tone and the TL is a more detailed and refined tone, The sweet spots on the volume knob are way different between these two. I wonder what would happen if the ICs were switched.
Blackburst:
Tobacco burst:
The most noticeable difference is the IC chips. The Blackburst uses a TL061CP instead of the LF441CN. To my ears, the LF is louder... more raw tone and the TL is a more detailed and refined tone, The sweet spots on the volume knob are way different between these two. I wonder what would happen if the ICs were switched.

But when they found out that it was for me, they said ok and threw it in without an up charge. Hard to believe that a company like that still exists... in America... in Cali no less!