doodlebug
06-05-2008, 04:55 AM
My latest project, now that I've moved into a new house, is to get the JBL 4670 theater speakers up and running. Yesterday, they were set up in the garage for a first run. Here's the parts breakdown on them:
Tweeter: 2445J with 2380 horns
Crossover: 3160 (500 hz) properly wired and padded down per the installation instructions
Woofer: 4508 cabinet with dual 2225Js wire in parallel. One driver recently reconed due to damage during the move.
Initial good and bad
-------------------
These things can throw one heck of a great soundstage across a large 2 car garage alright. I listened to a number of tracks last night and the midrange is quite outstanding.
This is not the case with the low frequency end. Here things are quite muddy and seems to lack the depth and detail heard from the tweeters. Specifically, double bass is indistinct when plucked, massed low strings appear as a 'mass' rather than distinct. All these observations come from high quality recordings (Reference Recordings, etc) and my own knowledge of how a double bass sounds (I play in jazz combos and ensembles).
I realize these components are intended for theater work, but did expect better detail from such a setup.
So, any suggestions on how to improve this situation? I'll be spending the next few weeks with the setup, including moving them around the room but don't believe what I'm hearing is a placement issue - but I'm open to being swayed on that, too.
Test gear, here, not that great but can run frequency sweeps, etc, once the rest of the gear is pulled from a box.
Thanks for the suggestions!
Cheers,
David
Tweeter: 2445J with 2380 horns
Crossover: 3160 (500 hz) properly wired and padded down per the installation instructions
Woofer: 4508 cabinet with dual 2225Js wire in parallel. One driver recently reconed due to damage during the move.
Initial good and bad
-------------------
These things can throw one heck of a great soundstage across a large 2 car garage alright. I listened to a number of tracks last night and the midrange is quite outstanding.
This is not the case with the low frequency end. Here things are quite muddy and seems to lack the depth and detail heard from the tweeters. Specifically, double bass is indistinct when plucked, massed low strings appear as a 'mass' rather than distinct. All these observations come from high quality recordings (Reference Recordings, etc) and my own knowledge of how a double bass sounds (I play in jazz combos and ensembles).
I realize these components are intended for theater work, but did expect better detail from such a setup.
So, any suggestions on how to improve this situation? I'll be spending the next few weeks with the setup, including moving them around the room but don't believe what I'm hearing is a placement issue - but I'm open to being swayed on that, too.
Test gear, here, not that great but can run frequency sweeps, etc, once the rest of the gear is pulled from a box.
Thanks for the suggestions!
Cheers,
David