naba2002

ok.......thisll b long but please bear with me. ok so i installed an alpine cda 7875, and a 12 disk changer connected it and all and it worked great. i then decided that the hole under the head unit looked ugly n i didnt want a cd holder thin. so i got a minidisk player......7755? hooked up the power n the ground to my existing wire harness and then used the preamps to hook the 2 head units together. all i get is sound from my rears, when i fade all the way to the front i can barely hear it. any help at all plzz guys im dyin here

elduderino

Well, you fucked that up real good.

You need to look at the install instructions to see how to hook them together -but hooking the RCAs together is NOT it. Never never never connect two outputs into an amp.

I THINK you daisy-chain the Ai-NET cables - the minidisk to the head uit and the changer to the mini-disk - but look at your install papers or look them up on www.alpine1.com click on tech support click on consumer to get into their manual database.

naba2002

yes i did. its really strange tho. i hooked up the changer and the FM to the minidisk instead of the cda and i get both front n rear but the cds has to be in AM FM mode and it isnt as loud as it was before, i have to turn it up with the minidisk and keep the cds on volume 1 becuse then u start to hear the static from the tuner....wtf??????????????

ron@se

I'm not sure of your model minidisc, but some of Alpine's equipment has settings for master and slave unit. You'll have to look in the literature that came with it. Usually, you go into the changer 1st, and then to the other source, in your case, your minidisc.

And what do you mean you hooked the 2 headunits together? You split the signals??? Hope not, if you did you probably blew something out.

elduderino

That usually doesn't cause damage to the outputs, just bad sound.

Yeah, there's often a slide switch on the bottom for maseter/slave. It would help if you mentioned all the model numbers.

naba2002

when i said i hooked them together i meant i used the ai net cable between them 2 minidisk MDA 7755 n cd player CDA 7875. then in order to get the sound i took the advice of a friend and hooked the preamps together CDA to MDA . the MDA can act as a preamp out or in . right now im figuring the since the MDA is an in that the speakers would have to be connected to the MDA not the CDA in order for the sound to come out?

elduderino

Your friend was half right.

When the Ai-NET switch on the bottom of the 7755 is in the "EQ/DIV" position, which allows an Ai-NET processor to be used, the RCA outputs on the 7755 DO become inputs.

But if the speakers were connected to the 7755, I'm STILL not certain you would hear anything, since the 7755 at that point thinks there is an outboard processor (like a PRA-H400 digital xover, for example). So that still might not work.

Bottom line is, from the info on the Alpine web site, it's not totally clear if the Alpine 7755 can be a slave unit. You need to call Alpine. 1 800 Alpine 1.

elduderino

7755:

http://www.stylestandard.net/oswego/...6/MDA-7755.PDF

7875:

http://www.stylestandard.net/oswego/...DA-7875_OM.pdf

According to the info, the 7755 can run external speakers while that switch is flipped... not sure if you have volume or not.

One function of flipping that switch is that volume gets exported to the processor, which you don't have, and the signal goes out the Ai-NET cable and comes back in the RCA. So if there's no processor in the loop, I think this is not going to work.

But call Alpine.

naba2002

hey guys called alpine the guy said that i need a kca 121b which is a ai net to rca wire so if i run that i should get it to work thru the aux thanks for the help!

elduderino

So how does that let you run the changer?

StreetEffectz

Yeah, how does that run the changer? The KCA121B is just an AUXILIARY plug, just like the blitz adapter works for the factory stereo.

Scott P

he would have to do the annoying task of daisy chaining the changer, the KCA121b would plug in back at the changer instead of at the radio

elduderino

Kinda a half-as way to do it, but I guess the MD player was set up by Alpine as a full HU, not as a slave as well...