iceblinkfroufrou Posted September 25, 2016 Posted September 25, 2016 I just bought a second hand Jamo SW 410e subwoofer and a second hand pair of Jamo E850 tower speakers from Gumtree classifieds. Also did a swap for a pair of Jamo Cornet 60 IVs.[These are fine.] One of the 850s produces music at a lower volume than the other. Also the treble isn't reproduced as well as on the other one either. What could cause that, other than it being stuffed! I've swapped them around and it's definitely the speaker and not the channel from my receiver. Actually i compared the sound of the two speakers over and over again quite a few times just to make sure. I could probably live with it as it's not THAT noticeable, but the trouble is now I KNOW, so i'll probably find it hard not to listen out for the difference between them when playing music. However i'd get used to it. The music still sounds good, but i suppose it doesn't sound as good as it could. It's a shame as i really like the look of them. I will probably move them from the music room and use them with the home theatre set up in the lounge, as i have little sonys there at the moment which i've had for about 20 yrs. It's very rare if i watch a movie so they'll be fine for the telly, plus i don't have it up loud owing to the mental neighbour next door! [Whats happening with the layout of this post? When i hit return it goes down two lines instead of the usual one.] The Subwoofer: Compared to my 'no name' brand subwoofer [which this is one maybe replacing] it's so loud and boomy. Even with the volume knob at the back turned to the minimum it is still boomy. My old sw had a switch to change the phase, this new one has a know that goes from 0 to 180. I've got it in the middle at the moment, i've played around with it but tbh i don't hear a difference so i don't know where to set it too. What is the best setting for the cut off dial? I did read somewhere that suggested to have it all the way round to the maximum, is this true? I've had a play round with it and also the bass and treble on my Harman & Kardon stereo receiver but tbh the bass seems to be too prominent, maybe over the next few days i'll find the 'sweet spot?' I bet i end up going back to the same setup i had before i got these, i just haven't had a lot of luck with speakers over the last couple of years. Yes i realize it's always best to listen to audio gear first before buying any, but they are used and i couldn't get up to where this couple lived and of course we all the there is a risk in buying second hand stuff.
srey Posted September 25, 2016 Posted September 25, 2016 I'm no expert, so don't take this as gospel, but I did have a very similar experience to you only yesterday afternoon! One of my old (second hand) Wharfedale Diamond towers had had a very slight crackling to it, so I swapped the speakers around to see what happened, and the noise followed the speaker. Once I moved them back the crackle was there on and off for a few minutes, and then bam, big drop in mid-ish volume, and on feel, the mid/woofer wasn't working. Being normal passive speakers (and not super fancy ones), I figure it can only be the driver or the crossover, so I pulled the baffle off and removed the driver. Driver seemed to behave normally when jumped with a battery, so I thought I had better pull out the crossover. Thankfully there was only one inductor on the way to that driver, and it seemed fine, as did all the joints on the crossover. When I was trying to jam a probe into one of the spade connectors for the driver though, it broke clean through with very little load, so I suppose they were aged, or crappy, or both. Since I couldn't be bothered driving somewhere to buy connectors, I just soldered the wires directly to the wire teminals. It'll be a pain if I need to pull it apart for something, but that's a problem for future me. Put it all back together and presto, full noise and no crackle! So, TL;DR: Make sure you have a multimeter, and just pull the sucker apart. Best case it's a dodgy connection like I had, or something on the crossover that's easy to fix. Worst case it's a dead driver (tweeter by the sound of yours) and you can try and hunt up a replacement. For the sub, I suppose it depends on how you're driving it, but I've always left the crossover at full range on the sub, and controlled the freq. at the receiver end.
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