The SF90 or "Staggered Four (channel) 90 watts" is one of a few most rarest amps ever manufactured by Soundstream. Manufactured around 1986, this was some of Nelson Pass earlier work he did for Soundstream. It was noted this amp retailed for around $350 and was available overseas.

unknown

unknown

F2033

F6651

F3762

F2033

F5523

F6427

Brian Graham

Matt Gogna

eBay

unknown

eBay

eBay

Travis Adams

Travis Adams

Oregon, USA

California, USA

unknown

unknown

New York, USA

Lampung Tengah, Indo

Tennessee, USA

Tennessee, USA