Peavey Subcompact 18 - Black Widow
in [Live Sound]
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From: Gareth Magennis on 25 Jul 2007 04:33 "Andy Hart" <news(a)ANDYHART.terra.es> wrote in message news:qw8QPFBp0kpGFwtR(a)freeuk.com... > In message <46A64324.658429E4(a)hotmail.com>, Eeyore > <rabbitsfriendsandrelations(a)hotmail.com> writes >> >> >>Andy Hart wrote: >> >>> Eeyore writes >>> >Andy Hart wrote: >>> > >>> >> I rang Peavey customer service who told me I'm using an amp with too >>> >> much power (Peavey 8.5c - 850w rms bridged into 8 ohms) and they >>> >> would >>> >> not replace the basket under warranty. >>> >> >>> >> Is this correct? Am I using an amp with too much power? >>> >> >>> >> I've previously used this same setup successfully for the past 5 >>> >> years >>> >> at higher levels with no problems. >>> > >>> >The power rating is 350W continuous. An 850W amp will have no trouble >>> >damaging >>> >it. >>> > >>> >Your judgement of '2/3rds volume' (whatever that's supposed to be) is >>> >clearly >>> >defective. >>> >>> See my other post. >> >>What signal / material were you playing through it ? > > An MP3 player with background music, music varies pop, rock, country, > ballads. > >> The only way to be sure of the >>power is to meter the amp output. >> >> >>> >As to the recommended amplifier size, that depends a lot on how you use >>> >it. >>> >>> Agreed, but I have been using the system for the past 5 years in this >>> configuration with no problems. The old basket didn't burn or smell, it >>> just gave good clean bass, the new one (with less stress) had an attempt >>> at burn out. could it have been defective manufacture? >> >>I doubt that it's a manufacturing issue. If there's any difference, modern >>materials are better so will take more of a beating. >> >>One possibility not yet considered is that there may have been some >>ultrasonic >>oscillation from the amplifier. You wouldn't hear that but it'll certainly >>cook a >>voice coil. > > Yes, the amp is quite an old Peavey 8.5c, maybe it's time to retire it, > it's not the best quality anyway and could very easily have a problem. > >> You'd need some test gear (and maybe a techie too) to check that out of >>course. > > My Other Peavey (1.3k) went "DC" and blew the top cabs (replaced with a > Behringer), maybe it's time to ditch Peavey altogether. > I've repaired quite a few Peavey amps in my time and I can't remember one ever having gone DC and taken out speakers. Even the crappiest of amps now tend to have rudimentary protection against this. > I've just (10 mins ago) purchased a pair of JBL bins from a friend, I > don't think I'll risk them on the Peavey, time for another Behringer > methinks. > > Thanks for the advice > -- > Regards > Andy Hart
From: Eeyore on 25 Jul 2007 04:45 "Ron(UK)" wrote: > Eeyore wrote: > > > Don't forget that lead-free soldering looks like dry joints by its very nature. > > Year but I can tell the difference between a lead free joint, a dry > joint and a joint with so little solder in it that I can probably pluck > the component from the board with my fingers. It's all to keep Greenpeace and Al Gore happy. Graham
From: Ron(UK) on 25 Jul 2007 05:00 Eeyore wrote: > > "Ron(UK)" wrote: > >> Eeyore wrote: >> >>> Don't forget that lead-free soldering looks like dry joints by its very nature. >> Year but I can tell the difference between a lead free joint, a dry >> joint and a joint with so little solder in it that I can probably pluck >> the component from the board with my fingers. > > It's all to keep Greenpeace and Al Gore happy. > I bought some Studiospares di boxes a while back, out of four boxes, three of them had intermittent dry joint problems out of the boxes, the forth one looked as tho it had been reworked already! It`s all gonna end in tears... Ron(UK)
From: Gareth Magennis on 25 Jul 2007 05:11 >>That may well be your perception but the evidence points to the contrary. >>Speakers get dark coils and blistered formers because too much power has >>been shoved into it. > > Yep, sounds reasonable > >> How many ohms was the basket > > 8 ohms > >> and were you driving it >>Bridged? > > Yes, the same as I've always done, the manual states ... > > 8 ohms (Bridge mode, mono) 850 W RMS > > The speaker is rated at 700w, I don't think this is excessive as the > rule of thumb is amp power double speaker power (for head room) > No it isn't, its rated 350W RMS. http://www.harmony-central.com/Events/WNAMM99/Peavey/SP-Subcompact-18.html Gareth.
From: Andy Hart on 25 Jul 2007 05:45
In message <CICdnTuKCK_CiTrbRVnyggA(a)bt.com>, Gareth Magennis <sound.service(a)btconnect.com> writes >>>That may well be your perception but the evidence points to the contrary. >>>Speakers get dark coils and blistered formers because too much power has >>>been shoved into it. >> >> Yep, sounds reasonable >> >>> How many ohms was the basket >> >> 8 ohms >> >>> and were you driving it >>>Bridged? >> >> Yes, the same as I've always done, the manual states ... >> >> 8 ohms (Bridge mode, mono) 850 W RMS >> >> The speaker is rated at 700w, I don't think this is excessive as the >> rule of thumb is amp power double speaker power (for head room) >> > > >No it isn't, its rated 350W RMS. > > >http://www.harmony-central.com/Events/WNAMM99/Peavey/SP-Subcompact-18.html Yes, the above (and the manual) states ... "Power Handling: 350 W continuous, 700 W program, 1,400 W peak" Is 850w too powerful for this spec? If so I'm quite happy to learn my lesson and move on, but this configuration has been working well for the past 5 years, this is the part that confuses me. -- Regards Andy Hart |