Adding a Herron VTSP 3A/360 Preamplifier to the system.

That's correct. Keith told me it's his last line stage revision.

For those that haven't seen this, here's a great, recent interview from Keith's home:

Keith Herron Interview

Hello, yesterday I called Keith Herron to talk to him regarding my VTSP 3A/360 preamp.

We talked about whether an upgrade would be useful, and Keith said no, the unit I have is one of the very early ones using six 6922's, and is built in a way that it would not benefit from an upgrade.

My thanks goes out to Oswaldo Martinez, who sold it to me. It's all he said it was,  and I appreciate his honesty..

Regards,

Dan

Hi guys. For those of you that had the upgrade done to Reference what did you note that changed in the presentation? Do you know what change Keith makes for this upgrade?

Thanks,

Mike

@vinylvalet - thanks for letting me know about that recent interview with Keith - I MUST check that out!!!! Love my 360/Ref! 

You're welcome.