The 644 is Soundstream's flagship 4-channel amplifier in the Reference series. Considered by some to be more rare than it's siblings (Reference 1000s and Class A 10.0). The 644s was introduced in the midish/late 90s.

BMFG367

BMFH885

BMFI411

BMFI620

Blake Cederstrom

Chris Miller

eBAY

Chris Miller

Minnesota, USA

Oregon, USA

Oregon, USA

New Jersey, USA

© 2020 Soundstream Registry

est. 2018