Krell FPB 300 Amplifier For Sale. This unit has been boxed up for almost 10 years after being returned from a check up from Krell. Amp was recently taken out of box and inserted in my system to confirm that it is in perfect working condition. There are two minor scratches on small darker panel inserted on front fascia as shown in picture. Balance of front plate is clean. Conservatively Rated 6 of 10 due to age, but it is probably closer to a 7 out of 10. This is a brute at 130 pounds. FPB stands for Full Power Balanced. It runs at full true Class A with 300 W @ 8 ohms, 600W @ 4 ohms & a Kw @ 2 ohms. Buyer to pay 3.2% paypal fee and ground shipping costs.