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To port or not to port

Hiya,

I have a dedicated 2 channel music only set up. (no HT) and currently have a pair of PSB Synchrony One B bookshelfs. I really like the speakers but sometimes percussive bass gets boomy and bass guitar has a resonant, for lack of a better term, droning quality to it. I feel the rear ports are the culprit. I've moved the speakers away from the wall in increments but it still remains. I've used every bass management crossover option on my pre-amp to no avail. PSB does not recommend stuffing the ports.

I'm thinking of going with a sealed design since I have a Rythmik sub to handle the low frequencies and a Parasound A21 amp to handle the lower sensitivity of a sealed box.

In the $2-3000 dollar range I've only come across 2 models.
The Vapor Audio Sundog and two from ATC, the SCM11 and SCM 19.

Would a sealed box "tighten things up" in the low end? And does anyone know of any other manufacturers making a sealed bookshelf?

Thanks.
mjm1124
ngjockey
1,042 posts
 
Too often I've seen commercial speakers using too small a box for the driver. Whether this is packaging or marketing, it leads to a peak in the bass. Are you actually using a high pass on the bookshelfs or just a low pass on the subs?

NHT makes sealed speakers.
lowrider57's avatar
lowrider57
5,417 posts
 
There are some good points raised; what is the output power of the amp into 4 ohms and have you listened to the PSBs with the sub removed? It would be interesting to know if the spkrs exhibit the same sonic problems in the bass.
mjm1124 OP
25 posts
 
Thanks for all your responses. After much fiddling I found that the sub was too close to the mains. After making some room and moving it to a corner I seem to have found the sweet spot.
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