1. Anyone know what amp this is by looking at it?




2. I'm not sure my second sub is hooked up, unless maybe it was hooked up inline with the first one. It feels like it's working but just not sure if it's the one that is hooked up moving it around. Is hooking them up in line a thing?


I'm a total audio tard. I will now pull out one of the subs and see if it's hooked up in line

 

Hooked up inline

 

The first amp is a JL Audio RD series. Just looks like the stick on badge in that circle has fallen off. Based on the size in the picture, I would venture to say it is a 400/4.

 

Who the fuck hooks up speakers in series? That's not at all how this works lol.

 

That is not completely true. There are several reasons you would run subs in a series vs parallel. Just taking a quick look at his equipment from the pictures but the subs in that box are available in both a svc and dvc model as well as 2ohm and 4ohm model. If they are SVC subs and 2ohm variety then running them in a series would give you 4ohms. The RMS of those subs is 250watts each. The RMS output of the sub amp is 500watts at 4ohms. So two SVC 2ohm subs in series give you the exact proper load for that amplifier. Could you have done it easier with other equipment sure but if the previous owner already had one part of the system and just bought the other piece to fit what he had it wouldn't be incorrect to wire it that way regardless how uncommon that is to do.

How to Wire Subs: Series/Parallel, Ohms, and Single vs. Dual Voice Coils | Car Audio Advice

That all being said my guess is those are not SVC and that the previous owner had no idea what they were doing.

 

I'm not super good with car audio stuff but it seems sketchy to run speakers in series vs parallel. Also, if you are running in series aren't you effectively halving the amount of available power to each speaker?

 

If you ran a DVC speaker in series you would be having the power but not an SVC speaker unless I am not remembering right. Been a long time since I did a deep dive in car audio. You are definitely having the power of that amp by making it run at 4ohms instead of 2ohms which is its optimal load rating. However, if you put that 2ohm load to those speakers you would need to turn the gain almost the entire way down or risk blowing those subs.

Again it is sketchy and not optimal but not impossible to do. My money is still on them being DVC incorrectly hooked up though. If they are DVC then you could run in parallel and get them to a 2ohm load but they you are overpowering them.

 

- I only think the P2's are available in DVC - 2 ohm or 4 ohm. I'll pull one out again today and see which I am.

Here's what's interesting, the wiring diagrams that RF recommends for either 2 or 4 ohm seems to all have them inline.

https://rockfordfosgate.com/products...-wiring-wizard

https://rockfordfosgate.com/products...-wiring-wizard

 

CCC, thanks for all the info

 

No problem. I see what they are doing. I assume yours are wired using Digram #4. Yeah they would be fine run that way and they are doing it to give you a 4ohm load total to run that amp at 500watts RMS. Makes sense and everything wil be fine hooked up that way. Didn't think about doing that with DVC subs but it is exactly what is needed. Not used to trying to run a Dclass sub amp at 4ohms. Typically you are trying to use a 1ohm or 2ohm load for subs as it maximizes the amps output and efficiency.

 

i have no idea what you just said.....

 

I will try and explain it a little better. When my mind goes through this sometimes I don't put it to words that well.

I just realized that the two links you posted earlier are different. It will depend on if you have the P2D2 or P2D4 before I can make sure your wiring is right.

The short answer of what I was saying earlier is that wiring diagram 4 that they suggest seems to be your best bet if you have the P2D4. With this configuration with these subs you will be providing the subs 500 watts power at 4ohms since wiring two of these way gives you a 4ohm load for the amp. You will need to turn the gain much higher to get bass out of these this way.


If you had the P2D2 then you would want to use wiring diagram #4 as well from that product page. If you wire two SVC subs this way you are giving it a 2ohm total load and your amp will put out 1000 at 2ohm. The subs can handle a peak power of 600 each so you will still be under there total power load but you will want to keep the gain turned down much more so as not to blow them.


You can burn subs up both under and overpowering them. Neither configuration is ideal but both will work.

Hopefully, I am more clear this time.

 

yep, sounds like i'm gonna pull everything out, verify what model and how it's hooked up

 

 

I haven't ruled out having kids yet and that right there is the number one reason I want to. Being able to share my hobbies and passions with them as they grow up.

 

Yep. There's a reason my rule is if I can't fit them all in it, I can't own it.

 

You might have to break that rule once to please the wife and you know buy an NSX. I mean it isn't too bad of a thing when the wife tells you that you should get one. :wink:

 

follow up question, would i be better putting these subs in a ported box?

 

And here I was thinking the kid would be perfect for interior and other close quarters work in the car.

 

Easy when they are little. But you also have to be aware they will have their own...and you might not like them (passions and hobbies) and they will change over time as well.

 

I refuse to believe they all fit in the porsche...

 

this. It's funny, my two older brothers are not even close to car people like my dad and I are. They totally missed that boat somehow. My older kids i now have to bribe to go to car shows with me, lol

the little man is still all about it though!

 

100%, baby in a convertible seat up front, older two in the back in boosters. Do it all the time

 

No room for Adri

 

The kids and I are totally fine with that... so is she!