amp question
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
amp question
I have 3 amps to use,
One is a 4x50 Eclipse amp
The second is a 4x75 Jensen amp.
Third is a Alpine amp 2x35 or 100 watt mono.
The head unit is a Pioneer double din 4x40
I also have 3-way crossover
I am assumming that the best thing to do is run the Eclispe amp to the speakers and run the Jensen to the two 8" subs or 1-10" sub that I have.
Do you guys see any chance for some combination or setup that is more than standrad, such as running tweeters from the head unit, mids & 6x9's thru the speakers etc? Or just stay basic with the 4x's going to the speakers?
[Modified by ld85, 10:17 AM 6/20/2002]
One is a 4x50 Eclipse amp
The second is a 4x75 Jensen amp.
Third is a Alpine amp 2x35 or 100 watt mono.
The head unit is a Pioneer double din 4x40
I also have 3-way crossover
I am assumming that the best thing to do is run the Eclispe amp to the speakers and run the Jensen to the two 8" subs or 1-10" sub that I have.
Do you guys see any chance for some combination or setup that is more than standrad, such as running tweeters from the head unit, mids & 6x9's thru the speakers etc? Or just stay basic with the 4x's going to the speakers?
[Modified by ld85, 10:17 AM 6/20/2002]
Melting Slicks
Joined: Jan 2002
Posts: 2,682
Likes: 0
From: Atlanta GA
Re: amp question (ld85)
First thing I'd do is throw the Jensen amp away. You can then do the following:
Assuming you have 4 speakers:
1. Use the Pioneer to power the speakers and the Alpine to power the 10" sub. This will be good.
2. Use the Eclipse to power the speakers and the Alpine to power the 10"
sub. This will be better, but more complex.
Assuming you have 6 speakers:
3. Use the Pioneer to power the smallest speakers (tweeters), the Eclipse to power the other 4 speakers and the Alpine to power the 10" sub. This will be best, and about as complex as #2.
4. A variation you might want to try for the subs are to use the Alpine in 1x100 mode and power the 2 8" subs in SERIES. Make sure you don't run them in PARALLEL or you will fry your amp. I can explain the wiring if you need.
Assuming you have 4 speakers:
1. Use the Pioneer to power the speakers and the Alpine to power the 10" sub. This will be good.
2. Use the Eclipse to power the speakers and the Alpine to power the 10"
sub. This will be better, but more complex.
Assuming you have 6 speakers:
3. Use the Pioneer to power the smallest speakers (tweeters), the Eclipse to power the other 4 speakers and the Alpine to power the 10" sub. This will be best, and about as complex as #2.
4. A variation you might want to try for the subs are to use the Alpine in 1x100 mode and power the 2 8" subs in SERIES. Make sure you don't run them in PARALLEL or you will fry your amp. I can explain the wiring if you need.
Safety Car
Joined: Jul 2001
Posts: 4,178
Likes: 2
From: Windermere FL
Re: amp question (leolufse)
Are the first two bridgable? If they are, use the bridged eclypse for the front and the Jensen for the rear. Use the alpine for a sub if you can go down to 200w@ 2 ohm. Drop the jensen if you can't bridge both and use the eclypse.
The deck power is 12wx4, not the labeled 40w or 45wx4. That is max power rating and not continuous which is how speakers and amps are rated.
The jensen is the worst of the three quality wise. The eclypse will probably out power it even though it is rated higher.
I would not use the power from the deck. If you are using seperates in front run them from the same channel the way they were designed to be run.
The deck power is 12wx4, not the labeled 40w or 45wx4. That is max power rating and not continuous which is how speakers and amps are rated.
The jensen is the worst of the three quality wise. The eclypse will probably out power it even though it is rated higher.
I would not use the power from the deck. If you are using seperates in front run them from the same channel the way they were designed to be run.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: amp question (92TripleBlack)
Thansk, it sounds like I'll use the Eclipse for the 4 speakers at 4x50 and the Alpine for the subs and will likely get another Alpine for the second sub.
This way all speakers will have 50 watts max and the subs will have 100watts.
The wiring has already been run so its just a matter of hooking it all up.
This way all speakers will have 50 watts max and the subs will have 100watts.
The wiring has already been run so its just a matter of hooking it all up.
Melting Slicks
Joined: Jan 2002
Posts: 2,682
Likes: 0
From: Atlanta GA
Re: amp question (ld85)
Thansk, it sounds like I'll use the Eclipse for the 4 speakers at 4x50 and the Alpine for the subs and will likely get another Alpine for the second sub.
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Pro
Joined: Apr 2002
Posts: 708
Likes: 0
From: Alexandria VA
Re: amp question (ld85)
>One is a 4x50 Eclipse amp
>The second is a 4x75 Jensen amp.
>Third is a Alpine amp 2x35 or 100 watt mono.
First off, sell the Jensen.
Take your eclipse, run it to your highpass speakers and put a crossover on them.
For the Alpine amp, bridge it to run to your subs and wire them in series so that the amp sees a 2ohm load, hence doubling the power. Adjust the gains accordingly and enjoy the setup!
Mike
>The second is a 4x75 Jensen amp.
>Third is a Alpine amp 2x35 or 100 watt mono.
First off, sell the Jensen.
Take your eclipse, run it to your highpass speakers and put a crossover on them.
For the Alpine amp, bridge it to run to your subs and wire them in series so that the amp sees a 2ohm load, hence doubling the power. Adjust the gains accordingly and enjoy the setup!
Mike
Melting Slicks
Joined: Jan 2002
Posts: 2,682
Likes: 0
From: Atlanta GA
Re: amp question (Bravery)
For the Alpine amp, bridge it to run to your subs and wire them in series so that the amp sees a 2ohm load, hence doubling the power. Adjust the gains accordingly and enjoy the setup!
Bridging the amp has the affect of the amp "seeing" half the load. Thus bridging an amp and running one 4-ohm sub, the amp will see 2-ohms. Bridging an amp and running 2 4-ohm subs in series, you add the resistance. 4-ohm + 4-ohm=8-ohm and the amp will "see" 4-ohms.
Bridging an amp and running 2 4-ohm subs in parallel, you divide the resistance 4-ohm/2=2-ohm and the amp will "see" 1-ohm. Keep in mind it will "see" 1-ohm until it overheats to point of self destruction. :smash:
Pro
Joined: Apr 2002
Posts: 708
Likes: 0
From: Alexandria VA
Re: amp question (leolufse)
Good lord the two of us bickering is going to end up confusing this guy...
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Re: amp question (ld85)
You know I hear you guys on the issue of the quality of the power but I find it real hard to belive that the Jensen amp is no good for a pair of 8" subs. I mean I can put 150 watts to each sub and the sub will likely never use a fraction of that. Maybe 50 watts(?) How clean does power have to be for a sub if the THD is the issue. I now .01 or less is inaudbile and the Jensen is .08.
I am not trying to start a debate an I trust and value your opinions immensly , but am I way off on this?
[Modified by ld85, 7:21 AM 6/21/2002]
I am not trying to start a debate an I trust and value your opinions immensly , but am I way off on this?
[Modified by ld85, 7:21 AM 6/21/2002]
Burning Brakes
Joined: Oct 2001
Posts: 1,205
Likes: 0
From: Dallas City IL
Re: amp question (Bravery)
Good lord the two of us bickering is going to end up confusing this guy...
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Series - 4 + 4 = 8 not 2
Parallel - 4 + 4 = 2 not 8
This is correct, I believe you unintentionally got the #'s mixed up.
Also on the amp, by bridging the amp, you are inverting one channel and running them together. You are both correct to a degree. A 4 ohm mono load is the same as the dual 2 ohm stereo load sumed together. Hence, an amp that is
1 ohm stereo stable is 2 ohm mono stable
2 ohm stereo stable is 4 ohm mono stable, etc.
I do agree, dump the Jensen, and use the Alpine. Bridge the Alpine on the single 10, I think this would give you the best results in your current situation. (IMHO) Then run the Eclipse on the highs. We just aim to help
:crazy:
Melting Slicks
Joined: May 2000
Posts: 2,148
Likes: 1
From: Chandler AZ
Re: amp question (leolufse)
Bridging the amp has the affect of the amp "seeing" half the load. Thus bridging an amp and running one 4-ohm sub, the amp will see 2-ohms.
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms
And regarding the Jensen amp: I've found them really good for throwing at the pigeons on my fence.
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
Re: amp question (gcrouse)
Dump the Jensen Amp immediately. ;)
Two subs are much better than one. Subs need big power if you want them to provide a good amount of punch. The sub will draw the most power in your system, way more than 50 watts. You will probably need a bigger sub amp if you like powerful, punchy bass like I do.
If you really don't want to buy another amp I would use the Eclipse for your 4 main speakers and bridge the Alpine and send it to your single 10" sub. Make sure you have a proper enclosure.
You will probably find you want more power in the future and will just end up redoing it anyway. I say mount (2) 10"s and get a nice big amp to power them. I would! :yesnod:
Two subs are much better than one. Subs need big power if you want them to provide a good amount of punch. The sub will draw the most power in your system, way more than 50 watts. You will probably need a bigger sub amp if you like powerful, punchy bass like I do.
If you really don't want to buy another amp I would use the Eclipse for your 4 main speakers and bridge the Alpine and send it to your single 10" sub. Make sure you have a proper enclosure.
You will probably find you want more power in the future and will just end up redoing it anyway. I say mount (2) 10"s and get a nice big amp to power them. I would! :yesnod:
Team Owner
Joined: Apr 2002
Posts: 28,742
Likes: 41
From: Frankenstein never scared me. Marsupials do, because they're fassst…and they DART, THAT'S crazy!
St. Jude Donor '03 thru '26
Re: amp question (M396 #00-011)
Good lord the two of us bickering is going to end up confusing this guy...
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Well, I believe this math may make him even more confused. :crazy:
Series - 4 + 4 = 8 not 2
Parallel - 4 + 4 = 2 not 8
This is correct, I believe you unintentionally got the #'s mixed up.
Also on the amp, by bridging the amp, you are inverting one channel and running them together. You are both correct to a degree. A 4 ohm mono load is the same as the dual 2 ohm stereo load sumed together. Hence, an amp that is
1 ohm stereo stable is 2 ohm mono stable
2 ohm stereo stable is 4 ohm mono stable, etc.
I do agree, dump the Jensen, and use the Alpine. Bridge the Alpine on the single 10, I think this would give you the best results in your current situation. (IMHO) Then run the Eclipse on the highs. We just aim to help
:crazy:
Series - 4 + 4 = 2
Parallel - 4 + 4 = 8
When an amp is bridged, it does not automatically drop impedance. If it is bridged to (1) 4ohm sub, it will see 4ohms. Basic resistance math here. I had (8) 12" subs in my truck, wired in series-parallel so my Orion saw a 2ohm load when it was bridged (didnt want it to overheat). Wiring can be VERY complex if you are trying to fool an amp.
Basically, we agree on what he should do with his amps, we agree on how they should be wired, I say run the sub-amp right-channel, left-channel and make it easy.
Mike
Well, I believe this math may make him even more confused. :crazy:
Series - 4 + 4 = 8 not 2
Parallel - 4 + 4 = 2 not 8
This is correct, I believe you unintentionally got the #'s mixed up.
Also on the amp, by bridging the amp, you are inverting one channel and running them together. You are both correct to a degree. A 4 ohm mono load is the same as the dual 2 ohm stereo load sumed together. Hence, an amp that is
1 ohm stereo stable is 2 ohm mono stable
2 ohm stereo stable is 4 ohm mono stable, etc.
I do agree, dump the Jensen, and use the Alpine. Bridge the Alpine on the single 10, I think this would give you the best results in your current situation. (IMHO) Then run the Eclipse on the highs. We just aim to help
:crazy:
However, series and parallel wiring is moot in this case since he should be using a single SVC sub. Assuming the sub is 4-ohm, here is what I recommend:
Use the 4-channel Eclipse on the speakers (again assuming there are 4 of them, more info would be helpful)
Use the Alpine bridged to the 10” sub. Since the Alpine amp is 2-ohm stereo or 4-ohm stereo/mono stable you should be ok. The only problem would be if 100 wrms will be enough power for it, if it even sees 100 watts.
What kind of sub is it?
Use the Jensen amp as a tire chuck. They come in handy if your on an incline and your parking break is out.
Good luck. :seeya