Scratchy noise - LSiM704C
So last year I purchased the LSiM704C on the yearly Polk FF deal. I got it and installed it in place of my random Boston VR920 center. My mains are LSi25, as are my rears.
From day one I thought the center sounded funny. Voices of a particular timbre would be scratchy or have a harshness to them. I swapped out center channel cables, center channel, source, swapped from amped back to receiver, same.
I even went so far as to buy a used Pioneer Elite SC05 to make sure it wasn't my receiver. This was like 6 months later (we don't use the theater a lot). On this go around I also had ordered some LSiM703s to replace the LSi25s as a downsize. I plugged the 703 in and the scratchiness was gone. Looks like the tweeter is bad. I called support today and waited about 15 minutes on hold. Afterwards the call lasted about 6 minutes and they're sending me a new tweeter and gasket.
I can't believe I waited over a year to fix this, but I guess my initial testing incorrectly showed the issue following source not the speaker.
From day one I thought the center sounded funny. Voices of a particular timbre would be scratchy or have a harshness to them. I swapped out center channel cables, center channel, source, swapped from amped back to receiver, same.
I even went so far as to buy a used Pioneer Elite SC05 to make sure it wasn't my receiver. This was like 6 months later (we don't use the theater a lot). On this go around I also had ordered some LSiM703s to replace the LSi25s as a downsize. I plugged the 703 in and the scratchiness was gone. Looks like the tweeter is bad. I called support today and waited about 15 minutes on hold. Afterwards the call lasted about 6 minutes and they're sending me a new tweeter and gasket.
I can't believe I waited over a year to fix this, but I guess my initial testing incorrectly showed the issue following source not the speaker.
Main Surround -
Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub
Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250
Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub
Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250
Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
Comments
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It can take a while to figure out. I ordered a pairs LSiM 703s from the Polk eBay store in December. One of the speakers had a bad tweeter and I figured it out fairly quick. But it took me about 6 months to determine that the bass driver was bad too. Polk took care of both and I have been happy since. It must feel good to have that fixed now, enjoy!
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First pair of 705's I bought, had a dead tweeter out of the box, and one driver that popped (scratchy when pushed in). They replaced the pair for me. Second pair had a scratchy tweeter that I noticed after a few days. Polk replaced the tweeter, then the replacement was scratchy as well. I sold them after less than a year and bought some focal arias. Those have been perfect
The 705's were great when they weren't broken. Which seemed like half the time I owned them.2 channel:
Bryston 4B3, Bryston BDA3, Cary SLP05, Shanling CDT1000SE with parts conneXion level 2 mods, Nottingham analogue ace space 294, soundsmith Carmen MKii, Zu DL103 MKii, Ortofon MC 20 MKii, Dynavector XX2 MKii, Rogue Audio Ares, Core power technologies balanced power conditioner, Akiko Corelli power conditioner with Akiko Audio HQ power cable, Nordost heimdall 2, Frey 2, interconnects, speaker and power cables, Focal Electra 1028 BE 2, Auralic Aries Femto, Black diamond racing cones, ingress audio level 1 roller blocks, JL Audio E110 with Auralic subdude, Primacoustics room treatments.
Theater:
Focal Aria 926,905,CC900, SVS PB ultra x2. Pioneer Elite SC85, Oppo BDP93, Panamax M5400PM, Minix neox6, Nordost Blue heaven LS power cables. -
Well, I have to wait for the new tweeter. But after that we should be golden!
Now... to somehow sell the LSi25s!
Main Surround -
Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub
Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250
Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD -
Now... to somehow sell the LSi25s!
Contact @la2vegas, he's only got about 20 pairs of Polks--but no Lsi25!
Jay
SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0 -
I've got 2 pairs of LSi25s lol
Main Surround -
Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub
Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250
Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
