audiodogster
Active Member
I just picked up Klipsch KSP-400 and a matching center on Tuesday morning and today I picked up what I won in an auction on Monday night: a pair of Infinity QB. They are in fairly good shape besides a few scratches to the veneer, the grills are perfect. I'd give them an 8/10 for cosmetics.
These speakers are unique, which I guess is a hallmark of Infinity speakers (from what I've seen, though these are my first pair). They have what I assume at the time (1977) were probably relatively expensive components, the EMIT ribbon tweeters, but are in vinyl wrapped cabinets that aren't mirrored.
Here's a couple of pictures:
Anyway, these being my first ribbon tweeters, I was excited to give them a listen and I was pleasantly surprised: they sound better than they look! I put on some Miles Davis and flipped off my subwoofers to get a sense of what their sound on their own and it was quite good. I did my organ test and while they were missing a bit of the lower frequencies, they performed well for their driver size. I played a movie trailer to see if they would work well in my gaming room and they were alright in that regard, I was hearing some vibrations but that was probably mostly them vibrating on the risers that came with them.
I haven't tried DeOxit on the pots nor have I opened up the speakers to check the crossovers but I am having one issue with one of the speakers. It seems the tweeter is producing excess floor noise (like a static whirring sound) when the speakers are playing, and the volume seems to depend on the upper-frequency volume. A guy I know from Craigslist that sells quite a bit of vintage mid-fi out of his garage suggested it could be failed glue on the magnets, any ideas? I don't want to damage the tweeters accidentally and if I do sell or gift these, I'd like to have them operating at 100%.
These speakers are unique, which I guess is a hallmark of Infinity speakers (from what I've seen, though these are my first pair). They have what I assume at the time (1977) were probably relatively expensive components, the EMIT ribbon tweeters, but are in vinyl wrapped cabinets that aren't mirrored.
Here's a couple of pictures:
Anyway, these being my first ribbon tweeters, I was excited to give them a listen and I was pleasantly surprised: they sound better than they look! I put on some Miles Davis and flipped off my subwoofers to get a sense of what their sound on their own and it was quite good. I did my organ test and while they were missing a bit of the lower frequencies, they performed well for their driver size. I played a movie trailer to see if they would work well in my gaming room and they were alright in that regard, I was hearing some vibrations but that was probably mostly them vibrating on the risers that came with them.
I haven't tried DeOxit on the pots nor have I opened up the speakers to check the crossovers but I am having one issue with one of the speakers. It seems the tweeter is producing excess floor noise (like a static whirring sound) when the speakers are playing, and the volume seems to depend on the upper-frequency volume. A guy I know from Craigslist that sells quite a bit of vintage mid-fi out of his garage suggested it could be failed glue on the magnets, any ideas? I don't want to damage the tweeters accidentally and if I do sell or gift these, I'd like to have them operating at 100%.
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