Hey guys I am kinda new into audio, and this is my amp (all the specs)
http://www.dealtime.co.uk/xPF-Lightn...trike_S2_400_2

yeah yeah la audio... but i love it... anyways.. i need to know if it is compatoble with these ( i know some of you guys are going to rag all on me for such a gay amp) but all i am just asking if it is compatible! thanks!

http://www.crutchfield.com/S-D9GEfEq...0&I=500SWR1541 is this compatible with my amp?

and....

the reason im asking is because im powering my amp to an 8 ohm speaker right now and the guy at the audio place said it would be better with a 4 ohm speaker.... so can anyone give me advice? appreciate it..

I wouldn't do it. You would have to run each voice coil off a channel. They probably wouldn't be perfectly matched and it could damage the sub.

What you want for your amp is a 4 ohm SVC (single voice coil) or a 2-ohm DVC (Dual voice coil).

Your amp can handle a bridged load of 4 ohms. Or 2 channels at 2 ohms or 4 ohms. The speaker you linked is a 4 ohm DVC which means you could wire it to 8 ohms or 2 ohms.

8 ohms will work but will be less than optimal.

The same sub in a 2ohm DVC model will be fine. Or you could get two dual 4ohm.

so get a 2 ohm dual voice coil?

im confused, could anyone find another type r that would be compatible with the amp then? that would help thanks!

*********** another thing... has to be 15 inch because my dad got me a nice box for a 15 inch....

http://www.crutchfield.com/S-ICQf0Yi...0&I=500SWR1521

That's the one you want, dual 2 ohm in series for 4 ohms mono.

Obviously you don't understand the wiring and the ohms.

Amps are rated in ohms that they can handle. As long as the ohms of the sub is equal to or greater than what the amp can handle you are ok.

Now here the first kicker. When you start mixing in DVC or more than one sub, the ohms will change due to the wiring (series, parallel, or combo of both).

The second issue is that as you change ohms, the power the amp puts out changes too. If you have a 200 watt amp @ 4 ohms, and you hook up a 8 ohm speaker, it will actually only put out 100 watts. Likewise if you hook up a 2 ohm speaker, the amp will try to put out 400 watts, and most likely burn itself up.

Your amp can do 2 ohms in stereo or 4 ohms bridged. You can pick one.
2 ohms stereo: get a 2 ohm DVC sub, hook one coil to each channel
4 ohm bridged: get a 2 ohm DVC sub, wire the coils together in the box in series so the coils add up to 4 ohms (2+2)

Personally I'd do the 4 ohms bridged so there is only one set of wires into the box. If you do stereo you will need 2 sets of wires into the box (one for each coil), and I doubt your box has 2 sets of terminals already.

Isn't it dangerous to hook one coil to each channel of a 2 channel amp? Isn't it possible the coils would get a slightly different signal and damage the sub?

Yup! Well, lets not even talk about damage to sub. The primary reason you wouldn't do it is because it could sound like ****. Depending on the phase of the two signals, you'll get either a fight/help relationship between the coils. The slightest little difference in signals could cause a change in the speaker's parameters resulting in some nasty distortion. You'd have to be absolutely possitive that the signals were identical, which means if there are different gains, forget it alltogehter. Even if not, there is a strong likelihood that the signals will be a slight bit different if the amp was not designed that way. What RegularJoe told you was right. He was just naming your theoretical options but in reality he only intends for you to do the bridged setup - and that IS what you should do.

alright i appreciate it...http://www.crutchfield.com/S-ICQf0Y...00&I=500SWR1521 so that one wont cause any damage if i dont wire it wrong? and no i dont have two sets of terminals so ill do that 4 ohm bridged. ok juts making sure guys....... sicne this is dual voice coils, do i take the positive coils and wire them together and wire it to the positive section of the terminal and do the same with the negatives? thanks! yeah you guys really helped my knowledge about what i needed to know

oh just making sure sorry... this is only for one speaker! so this sub will be aliright for my amp?

lol and just out of curiousity, how much wattage is my amp putting out if im powering the 8 ohm sub at 90 watts peak? you already know the specs of my amp so...

They are both valid options.

Everyone keeps talking about differences in the right and left channels of his 2 channel amp. Thats not going to happen on a 2 channel amp. If it was the case, then a pair of regular speakers would have the right playing louder than the left or something like that.

Has anyone ever heard of it actually hurting a sub? I never have. Actually I ran my Soundstream SPL 12's that way for years. All I had was a Soundstream 4 channel amp at the time I got them. I used it to power all 4 coils of the subs, one channel per coil. I just made sure to have a channels 1 and 2 to one sub, and channels 3 and 4 to the other. That way each gain controlled one sub. This did require me to put 4 terminal cups on the box .... instead of the normal two.

When it would be an issue is when you have a separate amp to each coil. Then you would have to match the gains.

I'd still suggest going w/ the amp in bridged mode though, just for the simplicity of the setup. Less wire, only needs one terminal cup, etc .....

A DVC 2-ohm sub will be perfect for that amp bridged.

This is from the JL Tutorial on Wiring Subs here: JL Wiring Tutorial

1 DVC driver with Voice Coils in Series
Connecting the two voice coils of the driver in series (+ to -) will result in the following impedances:
Dual-6 Ohm Subwoofer: 12 Ohms
Dual-4 Ohm Subwoofer: 8 Ohms
Dual-2 Ohm Subwoofer: 4 Ohms

Generally a double of the ohms cuts the power in half.

If the amp is 400 watts @ 4 ohms, then it would try to put out:
- 800 watts @ 2 ohms
- 400 watts @ 4 ohms
- 200 watts @ 8 ohms
- 100 watts @ 16 ohms

As the resistance increases (ohms), power decreases (current and power).

This is why its bad to use ohm loads that are too low. It sends mass amounts of current through the amp. It will make tons of power, but will most likely burn up. Think of 0 ohms as a dead short, ie touching the + and - together.

If you look and see some amps are 1 and even 0.5 ohm stable, but they are generally super expensive and put out massive amounts of power.

In general think of ohms as a measure of how hard it is to move a speaker.

awesome man so if i do my wiring correct it will act as a 4ohm speaker and ill be getting the correct wattage ill need from my amp then?! Woah, your really good at this

One more little thing, in your guys opinions......... would you rather get the DVC 2 ohms or a SVC 4 ohms?

DVC 2 ohms are more versitle (you can wire it in two ways). It usualy can handle more power than A SVC. It is also usualy more expensive. A SVC 4 ohm is easy to wire (only one way realy to wire it). Is usualy cheaper. It ususaly doesn't handle as much power as a DVC sub

The advantage of a DVC is of course the wiring options that it provides. Due to this its usually only a feature of better quality subs. Better subs usually handle more power and sound better ......

Take Alpine subs for instance.

Type E - SVC 4 ohm only
Type S - SVC or DVC, 2 or 4 ohm
Type R - DVC only, 2 or 4 ohm

I wasn't even talking about his 2 channel amp per se, just any amp. That's why I said particularly if you've got seperate gains. I believe that a difference in signals even slight enough so that it's not going to make one speaker louder than the other, could theoretically cause his woofer to sound like crap if he wires hsi coils in sterreo though.