Posted April 16 2003 - 11:28 PM
| Ed, a little more bench racing.. with one port plugged on a PB2+, do you think it would still be as loud as a 20-39PC+ ? If not, i wonder by how much.. What would you think. |
I wrestled with this very question as I was deciding on the PB2+. I didn't want to trade extension for sheer SPL.
I think an important factor for me in the decision making process was that I always run my 20-39PC+ with all three ports open and the SS filter set to 20 Hz, so I'm used to a 20 Hz tune.
With that said, a PB2+ with one port plugged (and SS/EQ switch set to 20 Hz) will still have more port area, and twice the driver displacement compared to a 20-39PC+. In the 20 Hz tune mode, I would estimate a PB2+ will still outgun a 20-39PC+ by 3-4 dB at 20 Hz and above.
Here's food for thought: What would the PB2+ FR look like with all three ports open and the SS/EQ switch set to 20 Hz? Clearly, the tune of the PB2+ is derived from both a custom EQ curve at each setting AND by plugging a port. Just how much each contributes to the state of tune remains to be seen. I will be running FR sweeps in these five tune modes just to satisfy my own curiosity:
1) 25 Hz three ports open
2) 20 Hz two ports open
3) 16 Hz one port open
4) 20 Hz three ports open
5) 16 Hz three ports open
Knowing SVS, this sub was not designed to disappoint. Frankly, I think it will come very close to dual cylinder performance in a single enclosure, and provide true Reference Level playback capability in an average HT room. When I get mine, I'll provide a detailed review with subjective impressions for HT and music, FR charts in various states of tune, and SPL peaks on hot DVDs with time stamps, etc. I'm pretty excited about this upgrade!