Polk SDA 2 Crackling left speaker. Blown???
Hi all.
New to the group. I own some Polk SDA 2's (1 tweeter - 2 mid-woofs) and I love their sound but I don't think I'm getting all that I can out of them with my current set up. So I tore down my studio to rearrange. When I hooked everything back together I switched amps to a Crown CE 1000. 275w at 8ohms - 450w at 4ohms. I had been powering it with a Hafler1600 (75w/8ohms) figuring I would get a truer sound with the added power. Before I hooked it up I tried to find out if the Crown is a common ground amp. Couldn't ascertain if it was so I just said 'screw it' and hooked it up. (cue ominous foreshadowing doom music...)
So I anctiously powered everything back up and the Polks sounded phenomenal!! HUGE.
Until...my left speaker began to crackle badly. The sound sputtering in and out. Then it would correct itself and sound great again...then more crackling. I freaked out and shut it all down. Checked the wiring and connections. Made sure that it was in fact the speaker and not the amp or something else. It's definitely the speaker. So here I am thinking....
Damn. Did I blow something??
Anyway, that's my tale of woe. I was hoping someone here could give me a plan of attack to further diagnose or fix the issue.
Thanks in advance for any assistance.
- Smit
New to the group. I own some Polk SDA 2's (1 tweeter - 2 mid-woofs) and I love their sound but I don't think I'm getting all that I can out of them with my current set up. So I tore down my studio to rearrange. When I hooked everything back together I switched amps to a Crown CE 1000. 275w at 8ohms - 450w at 4ohms. I had been powering it with a Hafler1600 (75w/8ohms) figuring I would get a truer sound with the added power. Before I hooked it up I tried to find out if the Crown is a common ground amp. Couldn't ascertain if it was so I just said 'screw it' and hooked it up. (cue ominous foreshadowing doom music...)
So I anctiously powered everything back up and the Polks sounded phenomenal!! HUGE.
Until...my left speaker began to crackle badly. The sound sputtering in and out. Then it would correct itself and sound great again...then more crackling. I freaked out and shut it all down. Checked the wiring and connections. Made sure that it was in fact the speaker and not the amp or something else. It's definitely the speaker. So here I am thinking....
Damn. Did I blow something??
Anyway, that's my tale of woe. I was hoping someone here could give me a plan of attack to further diagnose or fix the issue.
Thanks in advance for any assistance.
- Smit
Comments
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Another case of the cheap mega watts syndrome.
Your pro amp, which has no business in an home audio rig, is common ground because it can be bridged. I presume you had the volume at a high level when the issue started, so you may be tripping the polyswitch, which is a thermal reset device Polk installed to save the tweeter from cooking. Another possibility is you may have overdriven the mid-drivers causing the spider and cone to separate.Post edited by F1nut onPolitical Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Is the polyswitch inside up by the tweeter? Sounds like I need to do some surgery. I'll check the mids to see if they're separated.
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It's on the crossover board. It's marked S1 and will be either blue or mustard colored. You can't tell by looking at it if it's good or bad. You can remove it and replace with a jumper for testing purposes.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Thanks. Sorry about the multiple posts. Didn't mean to annoy.
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Happy to help. Let us know what you find or if you have more questions.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
