Underpowering my Subs
in [Live Sound]
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From: Tim Perry on 1 Feb 2010 20:31 "JWald" <wldj4(a)grics.net> wrote in message news:hk7jf80n4j(a)enews1.newsguy.com... > 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. >> > just one... it used to live in a church somewhere.
From: Tim Perry on 1 Feb 2010 21:12 "Rupert" <foodsteaks(a)gmail.com> wrote in message news:dbc984c6-89d7-4dc1-a954-b3ea7a8617f8(a)a5g2000prg.googlegroups.com... 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 When I screw up I'll admit it. There were 100 + boot scooters dancing that night and it was the first time I had used the box. The band had switched to an E-drummer so with zero feedback problems I could push it like a DJ system. The Show went on as these were just supplementing the system I had been using. I used it last summer as a backline bass rig. All the bass players liked it a lot. Some of the guitar players used it also. I added a 2-way 15" speaker when they did. I think one time I even had 2 guitars using the speaker at the same time.... when was the last time you ever saw that happen?
From: JWald on 3 Feb 2010 12:59 "Phildo" <Phil(a)phildo.net> wrote in message news:hk6i37$c6m$1(a)news.eternal-september.org... > > "Joe Kotroczo" <kotroczo(a)mac.com> wrote in message > news:C789D79D.AF361%kotroczo(a)mac.com... >> On 30/01/2010 01:40, in article hk02vp0147v(a)enews5.newsguy.com, "JWald" >> <wldj4(a)grics.net> wrote: >> >>> I guess I'm stupid. Are you suggesting a re-wire/jumping of the sub >>> input? >>> If so, 1+ to ? >>> Thanks. >> >> You can do it at the sub input, but you can do it also at the sub end of >> the >> cable, inside the Speakon connector. >> >> 1+ to 2+ and 1- to 2-. > > But be VERY sure to mark that cable. > > Phildo > Thanks. What are the concerns? -- J Wald "You can lead a horticulture, but you can't make her think.... "
From: George's Pro Sound Co. on 3 Feb 2010 13:06 "JWald" <wldj4(a)grics.net> wrote in message news:hkcdiv02eil(a)enews6.newsguy.com... > "Phildo" <Phil(a)phildo.net> wrote in message > news:hk6i37$c6m$1(a)news.eternal-september.org... >> >> "Joe Kotroczo" <kotroczo(a)mac.com> wrote in message >> news:C789D79D.AF361%kotroczo(a)mac.com... >>> On 30/01/2010 01:40, in article hk02vp0147v(a)enews5.newsguy.com, "JWald" >>> <wldj4(a)grics.net> wrote: >>> >>>> I guess I'm stupid. Are you suggesting a re-wire/jumping of the sub >>>> input? >>>> If so, 1+ to ? >>>> Thanks. >>> >>> You can do it at the sub input, but you can do it also at the sub end of >>> the >>> cable, inside the Speakon connector. >>> >>> 1+ to 2+ and 1- to 2-. >> >> But be VERY sure to mark that cable. >> >> Phildo >> > > Thanks. What are the concerns? > -- > J Wald > > "You can lead a horticulture, but you can't make her think.... " that you do not use it to feed a bi-amp box as pins 2+/2- feed the hf drivers and ifyou have jumped 1+ to 2+ and 1- to 2- you will be feeding lf content to hf driver, that is not good george
From: JWald on 3 Feb 2010 13:39
"George's Pro Sound Co." <bmoas(a)yahoo.com> wrote in message news:c9udnTMhR4beJvTWnZ2dnUVZ_jidnZ2d(a)earthlink.com... > > "JWald" <wldj4(a)grics.net> wrote in message > news:hkcdiv02eil(a)enews6.newsguy.com... >> "Phildo" <Phil(a)phildo.net> wrote in message >> news:hk6i37$c6m$1(a)news.eternal-september.org... >>> >>> "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 >>> >> >> Thanks. What are the concerns? >> -- >> J Wald >> >> "You can lead a horticulture, but you can't make her think.... " > that you do not use it to feed a bi-amp box as pins 2+/2- feed the hf > drivers and ifyou have jumped 1+ to 2+ and 1- to 2- you will be feeding lf > content to hf driver, that is not good > george > Roger that. I guess I was thinking that the 1 side of the input was feeding both hi and low thru the internal x-over, and the 2 side was just there doing nothing. I shoulda' knowed better. Thanks. -- J Wald "You can lead a horticulture, but you can't make her think.... " |