Advantage to using the SMS1 is that it can EQ and level 3 subs independently, the 976 has 2 outputs but only 1 sub eq and trim. I agree that setup could get complicated/confusing between the many crossover and EQ settings present on the 976 and the SMS1 but if you have 2 or more subs there appears to be a well thought out benefit to making the effort.
Edited: I have read the Outlaws guide to the SMS1 and while it has multiple sub outputs, there is only 1 EQ and trim. Paired with a 976 the SMS1 is a self contained alternative to using Room EQ Wizard for EQing the sub.
Edited by arbitrageur (07/08/19 08:03 AM)
Outlaw Audio Model 976 / 7700 / Ultra-X13
B&W CM9, CM Center, DS3 (side), DM303 (back)
Blue Jeans Cables (XLRs, Canare 4S11 Bi-wire, HDMI)
Tivo Bolt, Xbox One X, AppleTV, LG C765P
Roon, Allo Digione, Sonore MicroRendu, Uptone Audio LPS-1, Peachtree Audio Nova 150
GIK Acoustics Soffit Bass Traps, 244 Panels, Monster Bass Traps, QRD7 / Polyfusor Diffusers