Wiring, Stereo & Electronics Audio Components | Radars | Alarms - and things that spark when they shouldn't

2 omhs or 4 omhs

Thread Tools
 
Search this Thread
 
Old 04-20-2010, 11:25 PM
  #1  
TECH Fanatic
Thread Starter
iTrader: (7)
 
98z8uup's Avatar
 
Join Date: Apr 2008
Location: Covington ,GA
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts

Default 2 omhs or 4 omhs

I have and old school Rockford fosgate 75 amp. Which one will sound better in a stealth box. The 2 or 4 ohm spearker.

Last edited by 98z8uup; 04-21-2010 at 07:30 AM.
Old 04-20-2010, 11:45 PM
  #2  
Launching!
iTrader: (23)
 
OSU Football Fan's Avatar
 
Join Date: Jul 2008
Location: Cushing, OK
Posts: 294
Likes: 0
Received 0 Likes on 0 Posts
Default

Need more information on the amp.
If it's a 1 channel amp, the 2 ohm speaker will be better.
If it's a 2 channel amp, the 4 ohm speaker bridged
will be better. Either way 75 watts is pretty low.
(By speaker I assume you mean subwoofer)

Last edited by OSU Football Fan; 04-20-2010 at 11:56 PM.
Old 04-21-2010, 01:10 AM
  #3  
TECH Fanatic
Thread Starter
iTrader: (7)
 
98z8uup's Avatar
 
Join Date: Apr 2008
Location: Covington ,GA
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts

Default

Yes it's a 2 channel amp. Also all of RF old amps where underrated. If you know thier old stuff you know this is a real strong amp for it size.
Old 04-21-2010, 07:24 AM
  #4  
Ungrounded Moderator
iTrader: (4)
 
WhiteBird00's Avatar
 
Join Date: Nov 2003
Location: Jacksonville, FL
Posts: 11,083
Received 259 Likes on 223 Posts

Default

The impedance of a speaker has absolutely nothing to do with sound quality. Asking if a 2-ohm speaker will sound better than a 4-ohm is like asking if a blue car will be faster than a red car.

The impedance has a big impact on power output. Assuming that the amp can handle it, a lower impedance speaker will flow more current and produce more output power. If the amp is 2-ohm stable, it will produce about twice as much power into a 2-ohm speaker as it will with a 4-ohm speaker (if the amp isn't 2-ohm stable it will just go up in a puff of smoke if you do that). Twice as much power does not produce twice as much volume - it will produce 3dB more volume which is noticeable but not hugely significant. You need ten times the power to double the volume.

So to answer your question... neither will sound better (sound quality) but the 2-ohm will be somewhat louder as long as the amp can handle it.
Old 04-21-2010, 07:29 AM
  #5  
TECH Fanatic
Thread Starter
iTrader: (7)
 
98z8uup's Avatar
 
Join Date: Apr 2008
Location: Covington ,GA
Posts: 1,111
Likes: 0
Received 0 Likes on 0 Posts

Default

Thanks Whitebird00. It is a 4 ohm amp.

Last edited by 98z8uup; 04-21-2010 at 07:35 AM.
Old 04-21-2010, 03:41 PM
  #6  
TECH Enthusiast
iTrader: (15)
 
Fosnot's Avatar
 
Join Date: Jan 2010
Location: Lawrence, KS
Posts: 552
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by WhiteBird00
The impedance of a speaker has absolutely nothing to do with sound quality. Asking if a 2-ohm speaker will sound better than a 4-ohm is like asking if a blue car will be faster than a red car.

The impedance has a big impact on power output. Assuming that the amp can handle it, a lower impedance speaker will flow more current and produce more output power. If the amp is 2-ohm stable, it will produce about twice as much power into a 2-ohm speaker as it will with a 4-ohm speaker (if the amp isn't 2-ohm stable it will just go up in a puff of smoke if you do that). Twice as much power does not produce twice as much volume - it will produce 3dB more volume which is noticeable but not hugely significant. You need ten times the power to double the volume.

So to answer your question... neither will sound better (sound quality) but the 2-ohm will be somewhat louder as long as the amp can handle it.
I love your thorough answering of questions. Very nice.




All times are GMT -5. The time now is 04:05 AM.