impdedence on LSi25's
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pmckeealaska
Posts: 808
About a month ago, my 2-channel amp went into protection mode while playing a music video at high volume. I had done this many times before for 2 years without having this happen. I took the amp in to be looked at. The repair guy said he replaced the protection circuit but could not see any other problems. I had already wondered if it was a problem with my speaker since the right channel of the amp always ran warmer than the left and on this occassion it was really hot. I switched speakers, and when I did this the left channel got hot with the right speaker plugged into it. I am assuming this means something like the driver or crossover is bad. I have not picked up the amp yet since having it looked at, but I'm suspecting that the right channel speaker may be dipping down below 4 ohms and putting too much of a load on the amp. I know that the the LSi25's can dip below 4 ohms, but my question is HOW LOW can they go? Would it be unusual for them to dip to say 1 or 2 ohms for any length of time? I suspect that I'll need to send the speaker in for repair, but am trying to troubleshoot as much as I can before going to so much hassle since shipping it from Alaska to San Diego would not be cheap! Could it be time to check with a volt meter? Thanks for any suggestions.
Music and Movie Rig
Samsung 40" HDTV 1080p
LSi25 Front Speakers
LSiC Center Channel
LSiFX Surrounds
Rotel RB 1080 2-Channel Amp
NAD T763 Reciever
Denon DVD 2900 Universal Player
Audiosource 10 Band Digital Equalizer
Audioquest CV-8 speaker cables
Audioquest Sub-X subwoofer cables
Audioquest King Cobra Interconnects
Monster AVS 2000 Voltage Stabilizer
Playstation 3 120GB Slim
Samsung 40" HDTV 1080p
LSi25 Front Speakers
LSiC Center Channel
LSiFX Surrounds
Rotel RB 1080 2-Channel Amp
NAD T763 Reciever
Denon DVD 2900 Universal Player
Audiosource 10 Band Digital Equalizer
Audioquest CV-8 speaker cables
Audioquest Sub-X subwoofer cables
Audioquest King Cobra Interconnects
Monster AVS 2000 Voltage Stabilizer
Playstation 3 120GB Slim
Post edited by pmckeealaska on
Comments
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Under certain conditions they can dip as low as 2 ohms, and I may have seen a report hear or there of momentary dips to 1.5 ohms.
Are you running them full range or do you have the sub portion split out?
RuinDenon AVR4806CI
Denon DVD3930CI
Panamax 5500-EX
Polk LSi25 mains/subs
Polk LSiC center
Polk LSi9 Surrounds on Custom Skylan stands
Mitsubishi WD-65831
Audio Art IC-1 Interconnects
Audio Art SC-5 Speaker Wire