RMS power question? - Honda Forum / Acura Forum

acuradriva · 02-25-2003, 10:14 PM

Quote:

Originally posted by Fosgate13
Okay this will explain it.
I tell customers this all the time. You can kill a speaker by under powering same as over powering.

F13

Where do you work best buy?

HKSPower · 02-26-2003, 05:43 AM

If a speaker is rated at 60w RMS will I blow it if put like 75w rms to it??

Fosgate13 · 02-26-2003, 06:19 AM

Well not totally. i mean lots of companys put low RMS so that you are affriad to go over them. I mean most major speaker supplier is known to under estimating (spelt that WRONG) I have 2 15" Power Hx2 RMS is susposly 1000 watts i have 1500 on each , doing fine. Going a little over won't kill them but with them not giving you true specs becareful how much power you do supply them. Safe bet just go 10 over. But to each is own. Lot of people have their own thoughts on this subject.

F13

sfi · 02-26-2003, 09:08 AM

as long as the speakers are moving they are cooling their coils.now when you go over the excursion the speaker is stoped. even though only for a split second it is still time when cool air is not being drawn in. this also is the same for under powering, when the amp begins to clip it causes the speaker to suspend. only for a moment (@60 hz about every .0083sec.). so you can kill a speaker by under powering it to. the best way to keep from poping your speakers is too listen for distortion.if you hear it back off the volume (and/or bass setting) till you don't.

litspliff · 02-26-2003, 09:15 AM

http://www.eatel.net/~amptech/elecdisc/2ltlpwr.htm

i dont feel like typing it all out, so there ya go. read and acknowledge.

Welcome to BASIC CAR AUDIO.

:

PlayaWhyUHatin · 02-26-2003, 09:32 AM

Quote:

Originally posted by sfi
so you can kill a speaker by under powering it to.

please explain...

litspliff · 02-26-2003, 09:34 AM

Quote:

Originally posted by PlayaWhyUHatin
please explain...

i see you got a picture of Dave's car. mmmm......

PlayaWhyUHatin · 02-26-2003, 09:37 AM

Quote:

Originally posted by litspliff
i see you got a picture of Dave's car. mmmm......

yeah, i see it all the time at his shop. I was surfin cardomains and i saw the pic there so i had to grab it.

Fosgate13 · 02-26-2003, 10:48 AM

Okay this will explain it.
I tell customers this all the time. You can kill a speaker by under powering same as over powering.

Meaning that if your speakers say 120 watts. and your feeding it 55 watts the coils were made to honestly push around 100watts. The coil works harder and can actually burn itself out.

I know crazy.

F13

litspliff · 02-26-2003, 10:58 AM

Quote:

Originally posted by Fosgate13
Okay this will explain it.
I tell customers this all the time. You can kill a speaker by under powering same as over powering.

Meaning that if your speakers say 120 watts. and your feeding it 55 watts the coils were made to honestly push around 100watts. The coil works harder and can actually burn itself out.

I know crazy.

F13

looks like you need to read this too

http://www.eatel.net/~amptech/elecdisc/2ltlpwr.htm

come on guys, this is the basics here.... this underpowering theory has been going long enough. IMO, not enough heat would be created to burn it up with such low power. the only thing that hurts subs when underpowered is the user. it triggers the person into turning the gains up and playing at excessive levels to make it louder.

Fosgate13 · 02-26-2003, 02:27 PM

his words my words. All what you want to believe mines 15yrs experience and getting from reps. Hate to say he is writing about graphics about crap. yes crap is low but explain why a stock deck with stock speakers that hold 40 watts. are blown by a 15 watts deck. Sorry to say he made a page. Give me 2 weeks i will have web page backin my story...

Sorry to say but it WILL BLOW!

Moderator "acuradriva" was that a insult?
cuz sorry but i don't work at best buys I have a shop.

thank you.... come again!

F13

VTECnicalAccord · 02-26-2003, 03:30 PM

Quote:

Originally posted by Fosgate13
I tell customers this all the time. You can kill a speaker by under powering same as over powering.

Meaning that if your speakers say 120 watts. and your feeding it 55 watts the coils were made to honestly push around 100watts. The coil works harder and can actually burn itself out.
F13

Yeah, you can kill it with less DISTORTED power, not clean power.

VTECnicalAccord · 02-26-2003, 03:35 PM

Quote:

Originally posted by Fosgate13
explain why a stock deck with stock speakers that hold 40 watts. are blown by a 15 watts deck.

Distortion

Quote:

Moderator "acuradriva" was that a insult?
cuz sorry but i don't work at best buys I have a shop.

thank you.... come again!

F13

You HAVE a shop or you WORK at a shop?

litspliff · 02-26-2003, 04:21 PM

Quote:

Originally posted by Fosgate13
his words my words. All what you want to believe mines 15yrs experience and getting from reps. Hate to say he is writing about graphics about crap. yes crap is low but explain why a stock deck with stock speakers that hold 40 watts. are blown by a 15 watts deck. Sorry to say he made a page. Give me 2 weeks i will have web page backin my story...

Sorry to say but it WILL BLOW!

Moderator "acuradriva" was that a insult?
cuz sorry but i don't work at best buys I have a shop.

thank you.... come again!

F13

you can say all you want about that page, but keep in mind that this guy DESIGNS AND BUILDS amplifiers and the occasional subwoofer. he knows much much more than you do, and im sure of that. much more than probably any of us in here.

im sorry, but have you ever walked into radioshack or walmart and seen those crappy paper cone speakers for usually under $8? their rating is usually under 15W RMS, which is relatively the same as all stock speakers. (with the exception of the cars that come with an upgraded system)

same point here. right before you blow a stock speaker, wait, any speaker for that matter, is the sound coming out crystal clear? is it the same sound that you would hear if the volume was at a lower level? no, not hardly. it's a clipped signal, whether you hear it completely or not.

heres a comparison:

take a speaker and put it at half the rated RMS on a very clean, well-built amplifier. record your observations and keep it on for a good while.

take that very same speaker and put it on a low-end, dirty amplifier and record your observations at the same power level as the last one.

keep both of these playing at the same volume levels, same music if you want. hell, put them on a good 60hz. test tone for a while.

now, watch and see which dies first...

EDIT: oh by the way, not to insult your intelligence or anything, but most shop owners have no clue what they're talking about. most just sell or install some stuff, NOT HARD. actually knowing all the real technicalities isnt needed in owning and managing a shop. the local's proved that to me. i can go in there and tell them more about the stuff they're selling and installing than they could tell me.

71 mgb · 02-26-2003, 08:48 PM

Quote:

Originally posted by Fosgate13
Okay this will explain it.
I tell customers this all the time. You can kill a speaker by under powering same as over powering.

Meaning that if your speakers say 120 watts. and your feeding it 55 watts the coils were made to honestly push around 100watts. The coil works harder and can actually burn itself out.

I know crazy.

F13

i sure hope your just playin with us.....
if not i sure hope your employes are smarter then u...