Question about my setup

[Justinbebustin]

My amp is a little Alpine monoblock 500w, and I have 2 RF 10s I just purchased wired parallel. I'm wondering if it's possible to get the wattage down to half somehow by wiring different? I know next to nothing, and this is my first build. My concern is the RMS on the 10s is only 300, if I can get down to half I'd be in business. I just tried them earlier, they work, but if I turn it up and they start knocking the amp cuts out, safe mode I'm assuming? It plays fine and they hit at certain volumes. I have the LPF, bass and gain all turned to minimum to be safe, but that doesn't seem to hold back it's power. Any advice for a noob would be greatly appreciated!

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[massivespl]

Need to know what ohm woofers u have. Then u need to know what ohm stable your amp is. Lpf should be at about 80-100hz

 

[Justinbebustin]

2 ohm woofers. Amp is stable 4 ohms 250 RMS, 2 ohms 500 RMS, I just turned everything down to minimum, not sure what hz it is.

 

[massivespl]

Woofers single 2ohm or d2?

 

[Justinbebustin]

Svc and I also have a 2 fared capacitor installed.

 

[massivespl]

Svc

Well from what I see Rockford has single 4ohm woofers but I don't see single 2ohm.

 

[Justinbebustin]

I bought them on ebay advertised as such, and factory new. I get them out of the bag (no original box included) and the + and - terminals were beat! They were bent and a bit discolored, so I contacted seller and he assured me they're new, and he has many more like it. There is no info on the subs magnet either, they ARE RF tho

 

[fly_marlin]

Have the link to the ebay page? check your ebay purchase history, should have the model number there. Also, can you post the exact model of the amp? Which head unit do you have?

 

[Justinbebustin]

I'll post the ebay link. Alpine MRP-M500. Head unit is the factory cd player in a 06 Nissan Altima

 

---------- Post added at 01:11 PM ---------- Previous post was at 01:10 PM ----------

 

New 2 Rockford Fosgate 10" Subwoofer Speakers 2 Ohm Pair Bass Woofer Subs 300W | eBay

 

[fly_marlin]

Okay, can't find what woofer this is. I'm leaning toward them being SVC 2 ohm. How do you have them wired?

 

[Justinbebustin]

Parallel. positive out to left, spliced over to the right, negative out to right, spliced over to left. Saw this configuration on a website.

The box is 1.24 cubic feet per. I mounted them myself, had to solder the wire to the speaker.

 

[massivespl]

The guy says there new subs in the ad but then in the discription says there were used in a bass cabinet. So which is it. Used or new.

 

[fly_marlin]

Parallel. positive out to left, spliced over to the right, negative out to right, spliced over to left. Saw this configuration on a website.
The box is 1.24 cubic feet per. I mounted them myself, had to solder the wire to the speaker.

Well, if we go by what's stated, you have them wired in parallel to 1 ohm and the amp is 2 ohm stable - that's why it shuts off. You have to rewire in series to get a 4 ohm load. Btw, I recommend you not play anything until this is done.

 

[Justinbebustin]

The box says 500W X 1 @ 2 ohms, 300 W X 1 @ 4 ohms. From my understanding since I have them wired parallel, it takes the load down to 2 ohms? I bought the speakers because they were advertised as 2 ohms, so I figured if wired parallel they'd be right where they need to be, just overpowered. I must sound so inexperienced lol.

As far as I can tell, the seller had A pair in that cabinet, but he had like 20 pairs to sell on Ebay, and about 15 of them had already sold. And it's funny how when I soldered the wire on it I melted off some old solder that was already on it. I know, I know, buyer beware, it sounded too good to be true, I shouldn't have done it, but the brand name excited me as I had heard RF is top of the line.

How, exactly, do I wire it in series? I don't understand how much more can be done with only 1 + and - out from the amp!

 

[wew lad 5,000+ posts]

Well, if we go by what's stated, you have them wired in parallel to 1 ohm and the amp is 2 ohm stable - that's why it shuts off. You have to rewire in series to get a 4 ohm load. Btw, I recommend you not play anything until this is done.

this is the answer OP. running two 2 ohm SVC speakers in parallel results in a final load of 2 ohms.

two 2 ohm SVC speakers in series results in a final ohm of 4 ohms (you need to wire them for 2 or 4 ohms, with your set up you can only wire them for 1 or 4 ohms).

you generally can't run a 1 ohm load on a 2 ohm stable amplifier