Grid view List view Dynaco PAT-5 BI-FET “Pre-Owned”Dynaco PAT-5 BI-FET Preamplifier. This was one of the last Dynaco products produced before the business closed back in 1980. This pre-owned unit was very well maintained and it is 100% operational. Unit includes the (Rare) CAB-1D vented walnut cabinet… View Product