re: New Subwoofer - Onkyo tx-nr676

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SB12-NSD, PB12-NSD, PB-1000, SB-1000, SB-2000, and PB-2000.
Not seeing much difference.... except price.

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First, the SB subs are sealed and the PB subs are ported. Without getting into a long technical discussion ported is better for your room. Most of the negative issues people will attribute to ported subs only apply to poorly designed ones.

The NSD, 1000 and 2000 series use different drivers and amps, each one is just more capable than the previous series. No smoke and mirrors, you are getting what you pay for.