Dynaco PAS upgrade kits, 
PAS New Generation Preamp kits

Erhard Audio

Appointed North American distributor and reseller for Audioamp Auto Bias Modules
Why buy Erhard Audio tube stereo gear.....
Erhard Audio - Custom, handcrafted vacuum tube audio gear
Designed and built for the discerning analog audio enthusiast
Appointed North American distributor and reseller for all Lundahl Transformers
Important message regarding the current tube shortage, please click here