Senior HTF Member
- Sep 22, 2002
quote:Would you say that two of PB10-ISD's can handle any movie or music fed to them, that they have enough haedroom for every dinamic peak in a small to moderate sized room at/near reference level? I'm asking because i'm considering buying two of those in the not so distant future and want to know if they are good enough to meet my demands.
That would be highly dependent on actual room size, the distance to the listening position, and room acoustics. True Reference Level playback demands upward of 117 dB bass peaks at the listening position, and even a bit more if you are running the sub a bit hot (pretty common).
In my room (3.5 meters from the sub), I was hitting 104-106 dB (on average) bass peaks, as read on a c-weighted meter set to Fast. Dual PB10-ISD would up that to 110-112 dB (again c-weighted). Adding in a bit more to compensate for the c-weighted meter gets me in the 114-116 dB region. This is also corroborated by the in-room FR sweep in the review; I hit 110 dB before the sub limited out, and dual PB10-ISD would get me to 116 dB. So I would be just squeaking into Reference Level territory. Also keep in mind simply moving the subwoofers closer can dramatically improve headroom since SPL varies inversely with the square of the distance.
You're talking to a guy who runs a PB12-Ultra/2 in a mid-size room; I highly value clean headroom. If I was going to replace that subwoofer, I'd do it with four PB10-ISD and get roughly the same dynamic headroom (about 122 dB at the seat), and also even lower distortion.