WOW computer geeks and audio dont mix

[Scoobydoo 5,000+ posts]

This is from another forum, but I had to post it

HIS ORIGINAL POST:

I've got 3 25 ohm speakers, they are suppose to be use in an intercom system but 25 ohms is too much for our stuff. Non-DOA.
BE WARNED !25! Twenty-Five Ohms! IF YOU HOOK THESE UP TO A LESSER Ohms SETUP YOU WILL BURN UP YOU AMP/REVICER!

I am not responsible if you blow or damage your equipment because you hooked these up to a 8 or anything less than 25 ohms setup.

$20 each, shipped.

$50 for all shipped.

MY RESPONSE:

it is the other way around, the lower the ohm rating the higher the resistance, a 25ohm speaker has less resistance and create less of a load on an amp than say a 4ohm speaker
25ohm speakers will work on basically anything, but you wouldnt want to give them more than maybe 5 watts of power, they aren't made for that and you will probably fry the voice coil

HIS REPLY:

Are you sure? We had these things hooked up to a 400 watt 8 ohm amp, and it burned the amp up after ~4 months. We finally bought a new amp/tuner the other day and tried these out and the 200 Watt 8 ohm amp wouldn't even give us static on these things.

MY REPLY:

I am 100% positive.
With the amp you describe:

400 watts @ 8ohm

200 watts @ 16ohm

100 watts @ 32ohm

Half the resistance, half the power, double the resistance, double the power.

So you were probably giving that speaker about 150 watts and like you said it was made for an intercom and for about 5 watts, playing midrange voice frequencies.

My guess is you burnt up the speakers, not the amp

Click to read more...

 

[DBfan187 5,000+ posts]

lol

 

[ramos 5,000+ posts]

Aren't most PA speakers like that run at a higher voltage ? I see alot of them with what look like transformers on them //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[wesl56 10+ year member]

it is the other way around, the lower the ohm rating the higher the resistance, a 25ohm speaker has less resistance and create less of a load on an amp than say a 4ohm speaker

no u got it backwards.. 2 ohms of resistance is more resistance than 1 ohm... a 25 ohm speaker has more resistance

a straight piece of wire will have 0 ohms resistance... add a resistor and the oms reading will go up

besides those speakers are for an intercom.. leave them there //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

or were u just being a smartass? lol i cant tell

 

[Astyl 10+ year member]

isent it the other way around

The higher the ohm rating the higher the resistance, which is why you dont get as many watts as say a lower ohm cause more current can flow through with less resistance

 

[Scoobydoo 5,000+ posts]

well i am drunk, had a bad morning dealing with a "open intoxicant in public" fine so i decided to start drinking early, then i sat on the phone with some chicks insurance company for an hour cause she backed into me last friday

so i dunno what i said, seems the theory is correct, but my wording sucks

i do know that 400 watts going to a 5" intercom speaker is a bad idea and the situation amused me non sexually

//content.invisioncic.com/y282845/emoticons/titanic.gif.8089b7552c370bcc138aa121756d0c0b.gif

 

[Meka 10+ year member]

//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[lilmaniac2 5,000+ posts]

What they said you have it backwards

half the impedence double power out put thats why wiring amps at lower loads yields a higher power output, but u risk blowing the amp if its not stable at the lower loads

ie my hifonics gx4000

4000x1 @ 1 ohm

2000x1 @ 2 ohm

1000x1 @ 4 ohm

500x1 @ 8 ohm

 

[wesl56 10+ year member]

i do know that 400 watts going to a 5" intercom speaker is a bad idea and the situation amused me non sexually

//content.invisioncic.com/y282845/emoticons/titanic.gif.8089b7552c370bcc138aa121756d0c0b.gif

//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif intercom SQ ftw //content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif

 

[ramos 5,000+ posts]

Aren't most PA speakers like that run at a higher voltage ? I see alot of them with what look like transformers on them //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

serious question anyone know the answer ? //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[JimJ 5,000+ posts]

You mean like a field coil speaker?

Just what they used before ferrite mags came along...most of them were rated at higher impedances because all the amplifiers at the time were single ended triodes built for high impedances //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Scoobydoo 5,000+ posts]

i was half right, **** you guinness for making me a fool

anywho, the point was that he is selling 50 cent speakers for $20 each and another that he was powering 10 watt speakers with a 400 watt amp

i found it funny, now back to drinking and quit making fun of my dyslexia

 

[azbass 5,000+ posts]

you found it funny then tried to own him with some wrong info.

 

[Scoobydoo 5,000+ posts]

you found it funny then tried to own him with some wrong info.

my info isnt wrong if you read, i just flipped the ohm/resistance, other than that everything is correct

also i didnt try to "own" anyone as i think the phrase "own" is uneducated internet babble and would never use it

 

[MikeofTulsa Moderator]

what about pwn?