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Thread: Just a Rant...

  1. #1

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    Default Just a Rant...

    The on going saga of me, My Monitor 12's and being broke... lol...

    A couple of months ago i burnt out my first set of Tweets (sl2500) So i found two locally, replaced them (still sl2500) and burnt them out aswell... Now i come to find that the sl2500 are a plastic dome and tend to heat up easily (with a low power amp) (150 wpc with not much head room) As a result i melted all four domes! Not one of them blew a voice coil, just melted domes... hehehehehe... Anyhow I was getting to a point to where i was either going to sell these things off and forget the whole deal (discouraged)... So anyhow, I was puttsing around in the back bedroom one night and found my old Yamaha NS 8 Speaker boxes with a nice 1" silk dome tweeter in them and a couple of blow woofers! So i start thinking! Is it possible to carefully remove this dome and place into the sl2500 base and have a working set of tweets? Darn right... I know have a nice sounding set of tweets that look good and sound VERY good (maybe cause they are silk instead of plastic) But i am very pleased... They have been performing nicely for about two months now and no signs of meltdown yet :)

    So guess my major rant is... Why are most speakers power hungry and most amps SOOOO under rated?
    It's very hard to find a powerful enough amp to run these 12's at a good price (well price for me is out of the question right now) So my future is going to be lower volumes :)~ (but man do i love loud music)

    Steve

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    I wasn't aware the sl2500 or sl3000 were plastic, they are made out of a polyamid substance that is far from conventional plastic. This is a very rare occurance as I've never heard anyone speak of actually melting the dome. Have your gear checked as it may be passing a high level of DC current which will fry speakers, literally.

    150 wpc is not a low power amp.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    It sounds like abuse to me as that loudspeaker isn't hard to drive. Chill out, keep the rock concert memory in your head.

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    Quote Originally Posted by heiney9 View Post
    I wasn't aware the sl2500 or sl3000 were plastic, they are made out of a polyamid substance that is far from conventional plastic. This is a very rare occurance as I've never heard anyone speak of actually melting the dome. Have your gear checked as it may be passing a high level of DC current which will fry speakers, literally.

    150 wpc is not a low power amp.

    H9

    I couldn't tell you what they are specs wise, but they are some sort of plastic and melt pretty easily... The doom actually melted right where it's attached to the voice coil! First pair the ferro fluid even bled out through the dome!
    And i did have the amp checked about a month ago... I think i am just driving the amp to MAJOR clipping i guess!

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    Quote Originally Posted by dorokusai View Post
    It sounds like abuse to me as that loudspeaker isn't hard to drive. Chill out, keep the rock concert memory in your head.

    How very true!

    The thing of it is, I never take my volume past half way! Clipping is my guess!
    Oh the wonders of this hobbie :)

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    150wpc is quite respectable if it is coming from a separate amplifier & not a receiver.

    You either have equipment problems, or are quite deaf. At any rate Mark is right, stop abusing the speakers & your ears.
    Sunfire TGP III PrePro, Sunfire Cinema Grand Signature 405wpc 5 ch. Amp, Rotel RCD-1072 CDP, Onkyo TA2600 Tape Deck, Pioneer Elite 47-A DVD, Sony 32" XBR TV, Polk RTA-8T Main Speakers, Boston VR-920 Center Channel, Boston PV-600 Subwoofer, Polk DSW 400 Subwoofer, Polk FXi-3 Surround Speakers

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    I've always considered about 100 watts SS about the worst case for destroying speakers. Just enough to fry everything while not quite enough to get you where you want to be.
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D

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    Quote Originally Posted by cfrizz View Post
    150wpc is quite respectable if it is coming from a separate amplifier & not a receiver.

    You either have equipment problems, or are quite deaf. At any rate Mark is right, stop abusing the speakers & your ears.
    It's a reciever not seperates!

    Not deaf yet, but working on it!

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    I would look at the xover for the possible problem.
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
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    Dont BAN me Bro!!!!

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    Quote Originally Posted by madmax View Post
    I've always considered about 100 watts SS about the worst case for destroying speakers. Just enough to fry everything while not quite enough to get you where you want to be.

    I deffinitly think it's a clipping problem! It's an older Pioneer Reciever (late 80's) and i don't think it's up to the job!

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    OK...no ones asked. What type of receiver is it? If it's one of these newer "BPC" receivers, that's not near enough power for them and I can see why you chooched the tweeters. I'm running a 200wpc amps on either my SDA SRS2's, 1C's or Monitor 10B's and I've never melted a dome before.
    Richard? Who's your favorite Little Rascal? Alfalfa? Or is it........................Spanky?................. ................Sinner.

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    Quote Originally Posted by Mother Mooch View Post
    I deffinitly think it's a clipping problem! It's an older Pioneer Reciever (late 80's) and i don't think it's up to the job!
    BINGO! We have a winner, please step to the left to collect your prize.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    That reply was going in as I was typing mine, I guess.

    Yep....BINGO. It's like the saying goes....."crap in, crap out".

    Does that receiver (on a slim chance) have pre-out/main-in jacks where you could add on a real amp to it? If not, you're going to keep going thru tweeters. Maybe you should pull out the "good" ones and drop a pair of Piezo electric tweeters in there for the time being.
    Richard? Who's your favorite Little Rascal? Alfalfa? Or is it........................Spanky?................. ................Sinner.

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    Isnt the protection switch on the crossover (like the fuse on my 7's) supposed to stop the tweet from frying
    ?
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!

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    Some folks learn from their mistakes, some don't.
    '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 turd by the clean end."

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    Quote Originally Posted by F1nut View Post
    Some folks learn from their mistakes, some don't.

    More like Some folks have a rich taste on a HotDog Salary! PERIOD!

    Guess i'll go back to my old sears BoomBox and strap the bastard to my head! :)

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    I killed an SL2500 during a nice HOT afternoon party and extended high volume. Apparently Drunk+Loud+Clipping = New RDO tweeters!

    Seriously,

    I'm certain that my setup has the headroom and current reserve, so it HAD to be either sheer current, bad x-over, or just beer altered hearing, coupled with the Beer Goggles not seeing the "distortion" light (Clipping Indicator). I'm guessing that stupidity had something to do with it in my case, though outside of this forum I'll deny it EVERY time.:D

    Asus Xonar D2X (source)
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    Really sounds like your amp/receiver is sending DC current through the outputs. That is what burns voice coils, burns out crossovers, and possibly 'melts' tweeters. Mooch, do you have a basic multimeter? If so, take your amp out and hook it up with no inputs. Power it on, let it warm up, and measure DC current between the + and - terminals on each channel of the amp. It should be essentially zero. Anything more than 50mv means there is a problem with the amp.

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