The PA555 is $275, which is a bargain price for any preamplifier, let alone a vacuum tube model as they usually start over $1,000. The PA555 has four inputs, three in the back and one miniplug input on the front. Connect a turntable with a phono preamplifier, a disc player and a Bluetooth receiver to... The Bellari PA555 Preamplifier doesn't just sound "good for the money", the PA555 sounds "good for any amount of money." The PA555 has a no feedback circuit or integrated circuits in the audio path, it is all analog.
The Bellari PA555 Preamplifier. uses a 12AX7 tube running at 150 volts. The input signal is connected directly to the grid of the tube and all of the gain of The Bellari PA555 is also definitely more refined with better clarity; the PA555 also has a euphonic character that the FX Audio/Fosi Audio $50 "tube... Audio Amplifiers. Image is an illustration, may not reflect the exact product sold. * Please log into your account to avoid entering this information every time. PA555 Preamplifier.