Well I recently purchased Alpine 5x7 comps.. SPR-57LS Well stupid me I bought a 4 channel amp that I was going to run all 4 of my door speakers with. Well after I bought all the stuff I looked at the back of my Pioneer deck and there is only 1 preamp output so I can only run a 2 channel amp unless I add a signal booster, I guess, thats what I was told.

So stupid me I only hooked up the amp in 2 channel mode and just ran the power to the comps... The comps are rated for 60W and the amp put out 60W x 4 channels.. I hooked the amp up in 2 channel mode and never thought too much about it and I sent 240W x 2 channels and I heard a "pooof" and the woofers of the comps started freaking out...

I was pissed and thought I blew the speakers but I hooked up just the woofers to the deck and they still work.. so I narrowed it down to the fact that I most likely blew the crossovers..

Well I contacted Alpine to see if I could get a part number so that I could order replacement parts and they tell me that they dont sell those crossovers anymore or something.. And they told me to contact my local dealers to see if they had any extra Alpine crossovers hanging around anywhere.. I havent called them yet.

So does anyone have the crossovers for Alpine SPR-57LS or does anyone know of where I can get a pair?


Does anyone know how to check to see if a crossover is blown. I took my voltmeter and tested the continuity of the + and - terminals on the crossovers. The tweeter shows continuity but the woofer and input terminals dont.. So thats why I am assuming that the crossover is blown. Plus the fact that the woofers still work fine..


So to solve this issue I am selling my Soundstream Xstream XTA480.4 480W 4 channel amp and going with Soundstream Xstream XTA240.2 2 channel amp...
Any help would be greatful.. Thanks

Matt

 

All you have to do is but a pair of RCA splitters. 1 female end to 2 male ends. plug the splitters into your amp, then the other end into your set of RCA's and walla-4 channels. Total cost for spitters-10 bucks and 30 seconds to put them in.

Did you check the ohms on EACH speaker SEPATATE, or when they were hooked up to the crossover?

Probably would be hard to repair the x overs. Or make new ones. Or buy some from a different comp set (you can always find x overs on ebay). lol

Heck, if it was the crossover, I would just keep the 4 channel amp and run those comps active assuming your amp has the correct crossover adjustment (Im assuming the HU wouldnt since it only has 1 pair of preouts).

 

Well I thought about getting splitters for the RCAs but I thought that there would be a possible decrease in sound quality...

 

http://cgi.ebay.com/ebaymotors/Alpin...spagenameZWDVW

 

You could also flip that little switch on the end of your amp that says input mode to 2 channel and all you need is one set of RCA inputs. That would be the easy solution.

 

LMAO Sorry Matt...that's just too funny! But don't worry, it happens to the best of us (although, not to me YET).

I think I would change out the HU (after getting more crossovers) if your able to. But, I guess you could always use the splitter like dconder said. Question on that dconder...would there be an ohms issue with the speakers using a splitter like that? I don't know...never had to use one.

Becareful if you decide to go active...I've heard about alot of people that "poof" their speakers because too much power and not the right crossover points (setting beyond the speaker's capabilites).

 

He should not use a splitter. The amp has a switch that allows all four channels to be driven with only a 2 channel input. He will not be able to fade front to back but, should be able to adjust front to back gain on the amp.

 

Ahh...I didn't check out the amp's specs.

 

Whats wrong with RCA splitters? Just because of the 4-to-2 channel input on his amp or what?

 

Nothing wrong with the splitters. It would accomplish the same thing. I was just saying he does not have to use them. Either way, he looses fader control. Which may or may not matter. But, with splitters, wouldn't he loose the ability to adjust front and rear gains?

 

I had it on 2 channel input and thats when I heard the poof and speakers started acting up.. I have since took the amp out and just went to stock wiring to hook up the 5x7's in the door and they sound good..

 

Just so we understand Matt, when you say you had it hooked up in 2 channel mode, did you have your speakers bridged? That I could see but, if the amp was set to 2 channel input and you just had the comps hooked up to say the right and left front, it should not have done any damage. Only if you had say one comp hooked to the front bridged and one to the rear bridged.

 

Gotcha. I was thinking you were saying splitters were bad and I was like "Eh..?"

I dont think he would loose gain adjustment with splitters. Both inputs are still getting signal just like if you ran 2 seprate RCA's from the HU. I dont think the amp would be able to know the difference. Maybe Im wrong, lol.

Dconder, just as I was typing this Im browsing CA.com too and found this. Cant remember if this is the model you were wanting.
Zapco C2K 3.0
http://www.caraudio.com/forum/showthread.php?t=152683

 

thanks bartak. I saw it. He and I have been talking about it for the last couple of days. he offered me a little better price but still a lot of money. I do appreciate the heads up.

 

Yeah, I noticed afterwards in the 4Sale section on CA.com you had talked to him.