noob to ohms!!!

fresh
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Hi all,

I have always had others install my amps and subs for me, so I am new to this.

One of my 2 10 inch subs blew last week, and I just purchased this (Kicker dcvr10) which is dual cvr10's in a ported box with a single 2ohm outlet.

http://www.hifisoundconnection.com/Shop/Control/Product/fp/vpid/1570998/vpcsid/0/SFV/30046

My amp is PG XS2500 (older amp) which is 500W 4ohm stable in bridged mono mode.

http://www.phoenixgold.com/webfaq/XS.htm

1) Will this be ok, safe, and enough to run that box?

2) Will I damage my amp running this setup?

3) Will the amp blow these subs?

4) run the 2 outside terminals (+ and -) to make a single channel bridged, right?

5) what is the difference between (a) bridging the channels and (b) running both channels to the 1 terminal in the sub box?

Again, sorry for the noob questions, but we all have to learn one day //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Thanks in advance.

 
that amp only does 200w @ 4 ohms bridged........You need to find an amp that does 400w @ 4 ohms bridged.

EDIT: Yes, that amp will work, but not enough power for those subs.

 
That amp actually does 500W @ 4ohm bridged!!! Look down the page a bit.

that amp only does 200w @ 4 ohms bridged........You need to find an amp that does 400w @ 4 ohms bridged.
EDIT: Yes, that amp will work, but not enough power for those subs.
 
Hi all,
I have always had others install my amps and subs for me, so I am new to this.

One of my 2 10 inch subs blew last week, and I just purchased this (Kicker dcvr10) which is dual cvr10's in a ported box with a single 2ohm outlet.

http://www.hifisoundconnection.com/Shop/Control/Product/fp/vpid/1570998/vpcsid/0/SFV/30046

My amp is PG XS2500 (older amp) which is 500W 4ohm stable in bridged mono mode.

http://www.phoenixgold.com/webfaq/XS.htm

1) Will this be ok, safe, and enough to run that box?

2) Will I damage my amp running this setup?

3) Will the amp blow these subs?

4) run the 2 outside terminals (+ and -) to make a single channel bridged, right?

5) what is the difference between (a) bridging the channels and (b) running both channels to the 1 terminal in the sub box?

Again, sorry for the noob questions, but we all have to learn one day //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Thanks in advance.
1) No. 10" CVR's can take an easy 400RMS a piece.

2) No.

3) No.

4) Use the + on channel 1 and the - on channel 2 to bridge.

5) Impediance loads.

You'd be better off with an amp like this:

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=14736

-Bill-

 
that amp only does 200w @ 4 ohms bridged........You need to find an amp that does 400w @ 4 ohms bridged.
EDIT: Yes, that amp will work, but not enough power for those subs.
Final Impediance on those subs are 2-ohms. So he'll need 800W @ 2-ohms.

-Bill-

 
what happens if I run less than 800W @ 2ohms? Especially if it was very close to 800W?

Because the amp does 500W+ @ 4 ohms, it is reported that it does a lot higher @2ohms. Therefore, it shouldn't be very far from 800W. However the amp is not "reported" to be stable at 2 ohms. But if you read the bottom of that page I linked to, it seems that PG understands that people need to run their amps @2ohms and they "report" that it is doable and ok!!!

I really don't want to buy a new amp. The budget is really tight right now. The only reason I got the kicker box is because I got it for a smoking price.

Thank you all.

 
dB_SPL, one more thing...

You said that I won't blow the amp running this setup, and I also won't blow the subs running this amp to them... Well what is the disadvantage then?

 
Some amps can run ohm loads that their not reportedly able to do, but your always risking blowing it then.

Getting a more solid amp isnt that expensive, and probably the best route

 
what happens if I run less than 800W @ 2ohms? Especially if it was very close to 800W?
Because the amp does 500W+ @ 4 ohms, it is reported that it does a lot higher @2ohms. Therefore, it shouldn't be very far from 800W. However the amp is not "reported" to be stable at 2 ohms. But if you read the bottom of that page I linked to, it seems that PG understands that people need to run their amps @2ohms and they "report" that it is doable and ok!!!

I really don't want to buy a new amp. The budget is really tight right now. The only reason I got the kicker box is because I got it for a smoking price.

Thank you all.
Okay.. You can't just take any amp and wire it up to a lower impediance and expect to get more power. Therefore, they set limits at lower impediances so that it can still be stable at 2 AND 4-ohms without harming the amp. I don't see amps with such low numbers fry as often as 1000+W amps, but it can happen. So.. Your amp was made to produce 500W to one channel @ 4-ohms. If you use this channel to power your subs, you're just sending more heat than the amps heatsink is suppose to see at 4-ohms and your subs won't see the full 500W because they're wired for a 2-ohm load. Lower impediance = more current = more heat. This is why your amp is limited to 250W into each channel @ 2-ohms. So, if you want to do this the right way, Wire your subs to the amp for a 2-ohm load. They will be SEVERLY underpowered, but you're not going to overheat the amp.

OR look for an amp that says "1 x 800Watts RMS @ 2-ohms" so they'll see enough power at the right impediance. Hope that helps you understand a bit better. Otherwise, you'll have to ask someone else how to explain impediance wiring and stability...

-Bill-

 
Bill, thank you soooo much...

I think I understand but please be patient with me //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

My amps 500W @4ohms is bridged right? ch1+ and ch2-

Given the current situation, and without purchasing a new amp, you are recommending that I still bridge the amp ch1+ and ch2-

Given that the subs are wired for a 2ohm single channel load, the amp will start to work as a 1 channel bridged @2ohms correct?

This will equal more heat on the amp, right?

What about the power? doesn't 2ohm bridged gives more power than 4ohm bridged? That is my initial understanding of all of this. And that is why @4ohm stereo, the amp gives less power than @2ohm stereo! Doesn't it work the same way for mono?

Finally, would it be advisable to rewire the sub to take a 4ohm load? I am sure the subs can be rewired to give a total 4ohm load, leaving the amp to work properly at the recommended ohm rating.

Again, thank you soooo much.

MO

 
Okay.. Only two ways to do this..

Wire them in parallel to present a 2-ohm load. Example below:

2DVC_4-ohm_2ch.jpg


Wire them to present a 4-ohm load. Then bridge them (Ch.1+/Ch.2-). Example below:

2DVC_4-ohm_mono.jpg


Either way will push the most possible (500W RMS - 250 each) to your subs without risking damage to your amp or subs. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

-Bill-

 
Hi Bill,

Thank you so much for the diagrams.

I haven't really paid attention to them yet, because I just got a baby girl this morning //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

But over the next week or so, I will make sure to take a closer look.

Again, thanks for all your help.

Much appreciated.

Mo

 
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