Hypersonic

The op amps made my fosi za3 have a larger sound stage and overall improved the sound compared to the stock ap amps.

Last year I bought the Supersonic V2. It was a huge upgrade from the standard opamp. Now I am running the loudspeakers in mono bi-amping. The Hypersonic for the mid/high range. The space in the music was clearly better. The details, space and placing of the instruments and vocal was another clear upgrade. The low frequency is running with the Supersonic V2. For a test I switched the opamp but the Hypersonic is clearly better for the mid and highs. Next upgrade will be a second Hypersonice for the low frequencies.

very good op amp thank you