Underpowering my Subs
in [Live Sound]
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From: Tim Perry on 31 Jan 2010 22:55 "George's Pro Sound Co." <bmoas(a)yahoo.com> wrote in message news:GuSdnahUx76SsfvWnZ2dnUVZ_rWdnZ2d(a)earthlink.com... > > > It is common to run an amp with a continuous power rating around 2x > the rms rating of a speaker. > > I agree it is common, and often done, just as leaving the input > attentuators to minimum attentuation is. > I will also agree many many well meaning people will qoute this as gospel, > Myself, I won't do it, IMO it is foolish to attempt to go around a corner > at twice the posted speed limit and just as foolish to run 2x the amp into > a speaker > but this has been debated ad nausum both here and in other foru,ms and the > trade magazines > do so at your own risk, you will get away with it and there is no "one > number" that is universially considered proper > Debate it as you will > I am out of this thread > George > I have first hand experience with the DTH running with 2 EP2500's bridged. Cost me a recone. My DTH is for sale. In perfect operating condition and near new cosmetic condition with one speakon 8 pole connector. Make offer.
From: Phildo on 1 Feb 2010 07:39 "Joe Kotroczo" <kotroczo(a)mac.com> wrote in message news:C789D79D.AF361%kotroczo(a)mac.com... > On 30/01/2010 01:40, in article hk02vp0147v(a)enews5.newsguy.com, "JWald" > <wldj4(a)grics.net> wrote: > >> I guess I'm stupid. Are you suggesting a re-wire/jumping of the sub >> input? >> If so, 1+ to ? >> Thanks. > > You can do it at the sub input, but you can do it also at the sub end of > the > cable, inside the Speakon connector. > > 1+ to 2+ and 1- to 2-. But be VERY sure to mark that cable. Phildo
From: Rupert on 1 Feb 2010 15:26 On Jan 31, 7:55 pm, "Tim Perry" <timpe...(a)donespameroadrunner.com> wrote: > "George's Pro Sound Co." <bm...(a)yahoo.com> wrote in messagenews:GuSdnahUx76SsfvWnZ2dnUVZ_rWdnZ2d(a)earthlink.com... > > > > > > > > > It is common to run an amp with a continuous power rating around 2x > > the rms rating of a speaker. > > > I agree it is common, and often done, just as leaving the input > > attentuators to minimum attentuation is. > > I will also agree many many well meaning people will qoute this as gospel, > > Myself, I won't do it, IMO it is foolish to attempt to go around a corner > > at twice the posted speed limit and just as foolish to run 2x the amp into > > a speaker > > but this has been debated ad nausum both here and in other foru,ms and the > > trade magazines > > do so at your own risk, you will get away with it and there is no "one > > number" that is universially considered proper > > Debate it as you will > > I am out of this thread > > George > > I have first hand experience with the DTH running with 2 EP2500's bridged.. > Cost me a recone. > > My DTH is for sale. In perfect operating condition and near new cosmetic > condition with one speakon 8 pole connector. > > Make offer. Let see, the EP2500 is rated at 1300-1500 watts into 8 ohms bridged @0.1% THD. If you like to clip a bit on subs, that number can easily hit over 2000 watts. I'd say you were exceeding the "2x guideline" a bit if you were powering each 1000 watt program rated driving with one amp. If you're driving the amp with a processor that's capable of rms limiting, you can get away with the bigger amp. If not, it's certainly a gamble - especially with high compressed/low crest factor source material. Rupert
From: JWald on 1 Feb 2010 17:09 Is that 1 sub or 2? -- J Wald "You can lead a horticulture, but you can't make her think.... " "Tim Perry" <timperry(a)donespameroadrunner.com> wrote in message news:hk5jbn$i0a$1(a)news.eternal-september.org... > > "George's Pro Sound Co." <bmoas(a)yahoo.com> wrote in message > news:GuSdnahUx76SsfvWnZ2dnUVZ_rWdnZ2d(a)earthlink.com... >> >> >> It is common to run an amp with a continuous power rating around 2x >> the rms rating of a speaker. >> >> I agree it is common, and often done, just as leaving the input >> attentuators to minimum attentuation is. >> I will also agree many many well meaning people will qoute this as >> gospel, >> Myself, I won't do it, IMO it is foolish to attempt to go around a corner >> at twice the posted speed limit and just as foolish to run 2x the amp >> into a speaker >> but this has been debated ad nausum both here and in other foru,ms and >> the trade magazines >> do so at your own risk, you will get away with it and there is no "one >> number" that is universially considered proper >> Debate it as you will >> I am out of this thread >> George >> > > I have first hand experience with the DTH running with 2 EP2500's bridged. > Cost me a recone. > > My DTH is for sale. In perfect operating condition and near new cosmetic > condition with one speakon 8 pole connector. > > Make offer. >
From: Rupert on 1 Feb 2010 18:09
On Feb 1, 2:09 pm, "JWald" <wl...(a)grics.net> wrote: > Is that 1 sub or 2? > > -- > J Wald > > "You can lead a horticulture, but you can't make her think.... ""Tim Perry" <timpe...(a)donespameroadrunner.com> wrote in message > > news:hk5jbn$i0a$1(a)news.eternal-september.org... > > > > > > > "George's Pro Sound Co." <bm...(a)yahoo.com> wrote in message > >news:GuSdnahUx76SsfvWnZ2dnUVZ_rWdnZ2d(a)earthlink.com... > > >> It is common to run an amp with a continuous power rating around 2x > >> the rms rating of a speaker. > > >> I agree it is common, and often done, just as leaving the input > >> attentuators to minimum attentuation is. > >> I will also agree many many well meaning people will qoute this as > >> gospel, > >> Myself, I won't do it, IMO it is foolish to attempt to go around a corner > >> at twice the posted speed limit and just as foolish to run 2x the amp > >> into a speaker > >> but this has been debated ad nausum both here and in other foru,ms and > >> the trade magazines > >> do so at your own risk, you will get away with it and there is no "one > >> number" that is universially considered proper > >> Debate it as you will > >> I am out of this thread > >> George > > > I have first hand experience with the DTH running with 2 EP2500's bridged. > > Cost me a recone. > > > My DTH is for sale. In perfect operating condition and near new cosmetic > > condition with one speakon 8 pole connector. > > > Make offer. If it's the DTH version I'm thinking of, it has 2 drivers which can be wired independently. Each driver is rated at 1000 watts program, 500 watts rms (there's another version that's rated at 700/350W). You can drive the box with one or two amps. For economy, I'd say driving it with 2 is expensive. From the sound of Tim's post, it seems to be a single box he was driving with 2 amps. FWIW, the DTH sub doesn't go very low , it only goes down to about 45Hz. If Tim's version is the 700 watt/driver model, than a bridged EP2500 on each driver would be particularly too powerful. Rupert |