Vintage Krell

Both amplifiers were made at the same time and both share a similar sonic character.

These amps were designed around the same time so they sound very similar. Maybe the KSA 150 might sound a little sweeter, the 250 more dynamics with more slam. Your choice might hinge on room size and speaker efficiency. KSA 250 is hard to beat. They will heat up your room faster if this is a concern.