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Thread: Sierra 2 tweeter damage...

  1. #21
    Join Date
    Feb 2016
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    Loveland, Colorado
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    54

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by Pogre View Post
    Is the protective screen in the slot nice and tight still or is it loose or warped in any way? That would indicate the magnet might have grabbed onto something metal and pulled it into the ribbon element. Those magnets are extremely powerful. I know. I tried to measure my towers from the front with a tape measure and it sucked the tape right into the screen. I 'bout shit myself...

    I had the same measurement experience and reaction.

  2. #22
    Join Date
    Apr 2020
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    388

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by Jack1949 View Post
    I had the same measurement experience and reaction.
    Did it do any damage? My screen is a little warped now and it scraped my tweeter enough to leave a mark. I was considering sending just the tweeter back so Dave could repair it, but he determined it was only cosmetic and would have no effect on performance. Not worth the cost of repair (~$100 plus shipping both ways). I don't hear any difference and the mark is so tiny you really have to get close with a bright light to see it. At first I thought it was a piece of dust.
    Last edited by Pogre; 07-26-2020 at 10:50 AM.

  3. #23
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    Feb 2016
    Location
    Loveland, Colorado
    Posts
    54

    Default Re: Sierra 2 tweeter damage...

    I didn't have any damage. Nothing was playing at the time, so maybe I just lucked out.
    I didn't even think about the magnets when I stared the measurement, but they quickly came to mind during it. Afterwards I thought "well that was pretty dumb of me".

  4. #24
    Join Date
    Apr 2020
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    388

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by Jack1949 View Post
    I didn't have any damage. Nothing was playing at the time, so maybe I just lucked out.
    I didn't even think about the magnets when I stared the measurement, but they quickly came to mind during it. Afterwards I thought "well that was pretty dumb of me".
    I just met you, but we already have much in common! Here's what happened to mine.

    download_20200726_114023_copy_768x1024_copy_480x640.jpeg

    download_20200726_114754.jpeg

    Dave told me it's only cosmetic and not worth the cost to repair, but damnit all...

  5. #25
    Join Date
    Jul 2020
    Location
    New Jersey
    Posts
    90

    Default Re: Sierra 2 tweeter damage...

    So whats the deal with these speakers you can't play loud with them? Never heard of tweeters getting blown. Maybe it's better to order them wit the dome?

  6. #26
    Join Date
    May 2015
    Location
    Houston, Texas
    Posts
    1,390

    Default Re: Sierra 2 tweeter damage...

    they get plenty loud - just have to make sure the amp has the wattage to get to the sound pressure levels you want. No different than any speaker -- if the amp clips, you risk blowing a tweeter.

  7. #27
    Join Date
    Apr 2020
    Posts
    388

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by racrawford65 View Post
    they get plenty loud - just have to make sure the amp has the wattage to get to the sound pressure levels you want. No different than any speaker -- if the amp clips, you risk blowing a tweeter.
    Exactly. A combination of not enough power and too much volume will blow any tweeter.

    In fact tweeters tend to be the first thing to go when things do go south, whether dome or ribbon. When you exceed an amp's limits and it starts clipping the signal bad things can happen to any speaker.

    The Sierra 2s do get plenty loud, but they need good clean power to do it.

  8. #28
    Join Date
    Apr 2010
    Location
    Just outside Pearland, TX
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    301

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by MDinno View Post
    So whats the deal with these speakers you can't play loud with them? Never heard of tweeters getting blown.
    Really? I've blown loads of tweeters in my lifetime. Especially in college, trying to play too loud.

    In fact, for years I had a set of speakers that had Audax tweeters in them, and I blew the tweeters often enough that one time when I was driving through Madison, I stopped at Madisound and picked up a half-dozen of them so I'd be ready to replace them if I had to. (This is pre-internet.) I think I still had a couple left when I finally got rid of those speakers, but I ended up using most of the replacements.


    Maybe it's better to order them wit the dome?
    The tweeters I used to blow all the time were domes. The problem isn't the tweeters, it's the amp clipping. If your amp never clips, you won't blow a tweeter.

    I haven't blown one, dome or otherwise, in ages. Amps are better now, and I have more disposable income to put toward them. I don't generally listen as loud, now, either.

    If you're worried about it, decide how loud you want to listen (maximum), your distance from the speakers, look up how efficient your speakers are, and work out how much wattage you need for that volume level (there are calculators for this on the web). Then add at least 20% to that for safety margin, and you shouldn't ever have to worry about blowing a tweeter.

    Example: THX "reference level" says you need to hit 105dB for peaks (this is crazy loud, BTW, and I never listen even close to this). But let's say that's your target. Let's say a pair of S2s near the wall, you're 9 feet away. Calculator says 120 wpc, so I'd go for at least 150 wpc. But if you have a 120 wpc amp and try to go to "reference level" loudness, don't be surprised if you end up frying a tweeter. Your midline Dennon 3700 is right around this much power so it'd be chancy.
    Luna Duo V2 LR, Titan Horizon V2, and Rythmik L22 & L12 in HT, Sierra-LXs in study, S-2EXs and Duo V2 C in bedroom, S-1 NrTs in dining room, S-1s at work, HTM-200s in kitchen. Brother owns CMT-340s and dad has a pair of CBM-170s.

  9. #29
    Join Date
    Apr 2020
    Posts
    388

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by SunByrne View Post
    Really? I've blown loads of tweeters in my lifetime. Especially in college, trying to play too loud.

    In fact, for years I had a set of speakers that had Audax tweeters in them, and I blew the tweeters often enough that one time when I was driving through Madison, I stopped at Madisound and picked up a half-dozen of them so I'd be ready to replace them if I had to. (This is pre-internet.) I think I still had a couple left when I finally got rid of those speakers, but I ended up using most of the replacements.




    The tweeters I used to blow all the time were domes. The problem isn't the tweeters, it's the amp clipping. If your amp never clips, you won't blow a tweeter.

    I haven't blown one, dome or otherwise, in ages. Amps are better now, and I have more disposable income to put toward them. I don't generally listen as loud, now, either.

    If you're worried about it, decide how loud you want to listen (maximum), your distance from the speakers, look up how efficient your speakers are, and work out how much wattage you need for that volume level (there are calculators for this on the web). Then add at least 20% to that for safety margin, and you shouldn't ever have to worry about blowing a tweeter.

    Example: THX "reference level" says you need to hit 105dB for peaks (this is crazy loud, BTW, and I never listen even close to this). But let's say that's your target. Let's say a pair of S2s near the wall, you're 9 feet away. Calculator says 120 wpc, so I'd go for at least 150 wpc. But if you have a 120 wpc amp and try to go to "reference level" loudness, don't be surprised if you end up frying a tweeter. Your midline Dennon 3700 is right around this much power so it'd be chancy.
    I thought about mentioning sensitivity too. The Sierra 2 is an amazing sounding speaker but with 86 dB sensitivity it's going to take more power to hit higher spl than say, a speaker with a more average sensitivity of 88-89 dB.

    Just a 3 dB (like 86 to 89 dB) difference in sensitivity represents a doubling of power to hit the same spl.

  10. #30
    Join Date
    Apr 2020
    Posts
    100

    Default Re: Sierra 2 tweeter damage...

    Quote Originally Posted by Pogre View Post
    I just met you, but we already have much in common! Here's what happened to mine.

    download_20200726_114023_copy_768x1024_copy_480x640.jpeg

    download_20200726_114754.jpeg

    Dave told me it's only cosmetic and not worth the cost to repair, but damnit all...
    DANG Pogre, AGAIN! you're really giving us a lesson on what not to do.

    sorry to see that really! I just had to throw out a comment to ya.

    I an still eyeing the DUO center but i cant get the smile i need from the wife , YET.

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