Wiring questions........lol
Thread Starter
Safety Car
Joined: Sep 2004
Posts: 4,815
Likes: 0
From: Port Orange Florida
Wiring questions........lol
Okay two 8 ohm 8" subs....would it be more benificial to run them at 8ohms or do it at 4ohms?.......I have the option to do it either way..The amp will overdrive them either way.
If I run them at 4ohms I can save for my 12"......If I run them 8 ohm each I will have to three-way phase the amp.Or just delete the 12 all together..and keep the stealth look.....
Whatcha think Bogus?...
If I run them at 4ohms I can save for my 12"......If I run them 8 ohm each I will have to three-way phase the amp.Or just delete the 12 all together..and keep the stealth look.....
Whatcha think Bogus?...
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Well, look, if you are already overpowering them, it doesn't make sense to run them at lower impedence and overpower them more. They're only going to move so much.
Last edited by Kale; Dec 2, 2004 at 04:21 PM.
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,984
From: Iowa
St. Jude Donor '03 thru '26
Tell us what you have for a amp.
Chance are....you want to run the two speakers together into a bridged amp. Your amp will then be seeing a single 4 ohm load.
ie: If you amp is a 2-channel rated 150 watts rms per channel (4 ohms)and you hook-up each 8 ohm load seperately, each speaker will get 75 watts. But, if you bridge the amp into both speakers, the speakers will each get 300 watts
Chance are....you want to run the two speakers together into a bridged amp. Your amp will then be seeing a single 4 ohm load.
ie: If you amp is a 2-channel rated 150 watts rms per channel (4 ohms)and you hook-up each 8 ohm load seperately, each speaker will get 75 watts. But, if you bridge the amp into both speakers, the speakers will each get 300 watts
Le Mans Master
Joined: Jun 2004
Posts: 5,572
Likes: 4
From: Los Angeles Ca
so if you have them at 4 ohms you'll be wiring them in parrallel to one bridged channel or if you run them at 8 ohms you'll be hooking up each sub to it's own channel on the amp?
Well, running each sub at 8 ohms will give you better sound quality but they'll see less power from the amps. If you mean that the amp has enough power to run them at 8 ohms, i'd say go that route.
or just sell the two 8's and put the power to a 12
Well, running each sub at 8 ohms will give you better sound quality but they'll see less power from the amps. If you mean that the amp has enough power to run them at 8 ohms, i'd say go that route.
or just sell the two 8's and put the power to a 12
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,984
From: Iowa
St. Jude Donor '03 thru '26
I believe just the oppisite is true. The speakers could care less what the impedence is and 300 watts will give you a heck of a lot more headroom than 75 watts. The distortion could go up slightly in the amp but it would be so minor that not even the best ears in the world could tell the difference, espically in the subwoofer frequencies.
Scott, if you know of a book or article that disagrees with me, please forward it to me. Thanx
Scott, if you know of a book or article that disagrees with me, please forward it to me. Thanx
Le Mans Master
Joined: Jun 2004
Posts: 5,572
Likes: 4
From: Los Angeles Ca
Originally Posted by knewblewkorvette
I believe just the oppisite is true. The speakers could care less what the impedence is and 300 watts will give you a heck of a lot more headroom than 75 watts. The distortion could go up slightly in the amp but it would be so minor that not even the best ears in the world could tell the difference, espically in the subwoofer frequencies.
Scott, if you know of a book or article that disagrees with me, please forward it to me. Thanx
Scott, if you know of a book or article that disagrees with me, please forward it to me. Thanx
True the speakers wouldnt care about the impedence, it's the amp that feels the brunt of this. I also agree that we wouldn't really be able to tell the difference in the sq, but the amp will run cooler and be happier (live longer).
I just learned from a post i made earlier comparing 8's to 12's that the bass isn't any more 'loose' in a 12 compared to an 8. There weren't any hard facts posted but i usually agree with what the member has to say in other posts so I'm kind of trusting him blindly on this one. So my question to you is, why are you keeping the 8's and maybe adding a 12? What advantages do you see from this set up
Also, i think it is incorrect to say that each sub will see 300 watts in a bridged set up. Wouldn't they share 300 watts?
Thread Starter
Safety Car
Joined: Sep 2004
Posts: 4,815
Likes: 0
From: Port Orange Florida
First off, I know how to wire up a 4ohm load and such....I'll give those guys that don't Know a website on the FAQ section here to show.
OK, I was looking for pro's and con's........apparently I have a amp problem.I had a 12" Alpine TypeR in a sealed enclosure and it hit good but not what I expected.I have now tried two Kicker Comp VR's and they sounded like crap....I had to figure out why.Come to find out with experimenting that one channel of my 500a2 Fosgate is bad.The sound quality hits the dirt with both channels hooked up.I only run one channel and the 12" literally hit so hard the plastic trim around the hatch cracked in three spots.I have some serious dampening to be done..LOL
OK, I was looking for pro's and con's........apparently I have a amp problem.I had a 12" Alpine TypeR in a sealed enclosure and it hit good but not what I expected.I have now tried two Kicker Comp VR's and they sounded like crap....I had to figure out why.Come to find out with experimenting that one channel of my 500a2 Fosgate is bad.The sound quality hits the dirt with both channels hooked up.I only run one channel and the 12" literally hit so hard the plastic trim around the hatch cracked in three spots.I have some serious dampening to be done..LOL
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,984
From: Iowa
St. Jude Donor '03 thru '26
Originally Posted by scott_fx
True the speakers wouldnt care about the impedence, it's the amp that feels the brunt of this. I also agree that we wouldn't really be able to tell the difference in the sq, but the amp will run cooler and be happier (live longer).
That is exactly true (all of the above
) and is one reason I wanted to know what amp he has. I have run two different PPI amps bridged since 1991, no problems. I ran a USAcoustics stereo for years but when I ran it bridged, it lasted a week, then poof :o
I just learned from a post i made earlier comparing 8's to 12's that the bass isn't any more 'loose' in a 12 compared to an 8. There weren't any hard facts posted but i usually agree with what the member has to say in other posts so I'm kind of trusting him blindly on this one. So my question to you is, why are you keeping the 8's and maybe adding a 12? What advantages do you see from this set up
Yes the diameter size debate has gone on awhile. It stems that the larger the woofer the higher the moving mass. Therefore, the heavier the cone the less control it will have. ( ie. the heavier a car is it will be slower to brake and accelerate) Today's sub, the 12"s normally handle alot more power then the same manufacturer's 8"s. More power, better control. I personnally think it ends at the 12"s. Some 15" are okay but as a rule of thumb, 15's and up are better at better at 50Hz and below because of the the lower you go, the slower the woofer has to move. My two JL 18W6's made my jaw hurt (I'm serious) and they hit over 150 db but they don't have the impact like the 12"s in my Vette or the 10"s in my white TalonTsiAWD.
Also, i think it is incorrect to say that each sub will see 300 watts in a bridged set up. Wouldn't they share 300 watts?
That is exactly true (all of the above
) and is one reason I wanted to know what amp he has. I have run two different PPI amps bridged since 1991, no problems. I ran a USAcoustics stereo for years but when I ran it bridged, it lasted a week, then poof :o I just learned from a post i made earlier comparing 8's to 12's that the bass isn't any more 'loose' in a 12 compared to an 8. There weren't any hard facts posted but i usually agree with what the member has to say in other posts so I'm kind of trusting him blindly on this one. So my question to you is, why are you keeping the 8's and maybe adding a 12? What advantages do you see from this set up
Yes the diameter size debate has gone on awhile. It stems that the larger the woofer the higher the moving mass. Therefore, the heavier the cone the less control it will have. ( ie. the heavier a car is it will be slower to brake and accelerate) Today's sub, the 12"s normally handle alot more power then the same manufacturer's 8"s. More power, better control. I personnally think it ends at the 12"s. Some 15" are okay but as a rule of thumb, 15's and up are better at better at 50Hz and below because of the the lower you go, the slower the woofer has to move. My two JL 18W6's made my jaw hurt (I'm serious) and they hit over 150 db but they don't have the impact like the 12"s in my Vette or the 10"s in my white TalonTsiAWD.
Also, i think it is incorrect to say that each sub will see 300 watts in a bridged set up. Wouldn't they share 300 watts?