my sony cd player doesnt put out enough volts to the subs, so at low volume they cut out and dont sound clear at all............is there any way i could get it fixed where it would stop doing that.......and if so......how much

thanks

 

hmmm Ive never really heard of boosting the pre outs..... if they are cutting out im not quite sure if thats your problem.

 

I think what your looking for is a line driver. http://www.sounddomain.com/shoptype/Line+Drivers heres a couple

 

i wouldn't spend $100+ on a line driver, especially if i owned a Sony HU, i'd just get a better head unit. I think that's the best route for you.

- Andy

 

why do you think that preout voltage is the problem?

 

Are you running them without an amp??? If so don't bother boosting the preamps. just buy an amp.

 

9177.........i think that'll work!!...thanks

and yes i've totally changed out everything else so thats all that i can think of that is left..........

and yes i have an amp........im not a dumb@$$

 

I agree with others above I don't think one of these will help you with your problem. Unless you really like this deck I would look at a new deck before I would buy line driver for your application.

 

amen,

consider buying a quality headunit before you try to mod the one you have.

- Andy

 

well since this is the only problem with my cd player then im probably gonna keep it.......and besides you find me a good cd player with sub output controls for under 100 dollars.........


and hey White Ninja how bout you take your advice and SHOVE IT!!!.......my cd player isnt low quality!!!!

 

If it was quality it wouldn't have this problem to begin with. EVERY sony HU i have had was not worth the intial money let alone any money to fix it. We are just trying to keep you from spending money on useless. items.

 

I've only used one head unit that had such a low pre-out voltage that it caused problems. It was a 10 year old Pioneer **** style cassette player.

No modern cd player, even the cheapest crap out there, should have insufficient preout voltage. If your deck is causing those problems, it's because there's something wrong with the deck and a line driver isn't likely to help, nor is it cost effective. You can buy a new deck for what the line driver costs.

 

Thanks.

i'm wasn't trying to be an a$$, i'm sorry if i came off to be that way. i'm just trying to help you...no point in spending money on a line driver when that's not the problem. i guess i'm not the only one whose advice is gonna get shoved....

- Andy

 

I’m going to backup White Ninja on this. I fix car audio units for a living, and I don’t think that a line driver will help you. Listen, I’m not trying to be an A$$ but I work on this stuff and Sony car audio IS low end. There design is bad and build quality is horrible. I really do think you will be better off getting a quality HU. Again not trying to be a jacka$$, just honest. Think about it like this, you’ll pay as much for the line driver as the HU, or close to it. And like I said before I don’t think that a line driver will help you. How about a detailed description of the problem.

 

Are you sure it's the head unit? It's real easy to test, just get a device with rca outputs and connect a short cable from it to your amp. I've used a laptop before with AV outputs to test amps before and it worked fine. Double check that the RCA cables are properly attatched at the head unit and the amp. Make sure your gain and cross-over settings are correct. If all else fails your amp may have a high impedance input. You can just use some speaker wire attatched the the rear speakers to run the amp. It's not the greatest long term solution, but if you're looking to get your subs back with little to no expense, that may be the way to go.

 

sorry.....i was having a bad day and i took as you putting down my cd player even though i really like it........

but as for what i have done to try and fix the problem....

i have replaced the 10gauge power wire with a 4gauge
i have tried different RCA wires
i have messed with the bass/sub output/crossover/gain controls
the only thing i have NOT replaced is the remote wire...and i didnt do so cuz i figured it had nothing to do with it.....and it also is in good shape
and my friend has the same amp and a NEWER sony cd player and his works just fine at all volume levels.......so i know its not the amp


okay since it looks like i should b getting a new cd player.....who makes some that have the sub output controls........cuz thats basically all i really care about......well and good looks.......

 

Wow, you’ve covered it well. You said you have replaced the RCA cables, but was it with a long run? Where the cables in excellent shape, no kinks or bad spots in the insulation? If the HU already has a borderline low voltage problem on the pre-amp outputs bad cables would compound the problem so by the time you got back to the amp the borderline low output isn’t borderline anymore, It’s a problem. If you have something other then that HU that has pre-amp outputs try that to eliminate the amp as the problem. I Didn’t see what kind of amp it was (brand/model) but make shore the problem IS the HU and not some odd problem with the amp. If you replay back give the HU and amps brand/model.

 

cd player is a CDX-7000x
looks like this

 

ok.....well i hope u guys think the amps are better than their cd players cuz i have a Sony XM-2150GSX

looks like this.....




and the RCA cables were long,but they were brand new and i had nothing wrong with them......

 

That's the same amp my brother has. When the system starts to cut out do any of the indicator lights come on? You can test the remote wire in a couple of ways. One, remove it from the amp and put a test light on it. Turn the stereo on and touch the test light to the ground on the amp. If it comes on it's good. Two, put a small piece of wire in the remote slot on the amp. Turn on the stereo and touch the wire to the power wire on the amp. I would do some sort of test tho to make sure it's the head unit and not the amp/wiring. I just pulled a head unit because it wouldn't turn on the amps or use the cd changer. Turns out I had to much of a draw on the remote wire. But it was a good excuse to buy something new. Are you running anything beside the amp off of it, like a neon light?

 

no......no lights come on...im pretty sure the amp if fine.....i just got it like a month ago.......
i will have to try that thing of checking the remote wire.........also....would i b able to use one of those meters to find out how many volts are running through my rca cables so i could see if it is insufficient?


thanks

 

You mean a volt meter? You could, although the numbers would fluctuate so rapidly that it'd probably be too hard to tell if it was hitting the proper levels. That amp should have a high impedance input, so you could run speaker wire from the rear speakers to the amp. That would bypass the RCAs altogether.

 

yah but then i woudl have to get that converter so i could still hook them up to the RCA input jacks..........right?

 

No, there should be a set of four inputs similar to the one for the remote wire. It'll say something like "high level input" or something like that. Then you just tap into the speaker wire for the rear speakers and run it to the amp. You remove the rca cables from the amp because now it's getting the signal from the speakers instead of the preamp.

 

alright.....i may try that.........if that works then that means i will have a little bit more time to replace my cd player......


thanks

 

“would i b able to use one of those meters to find out how many volts are running through my rca cables so i could see if it is insufficient?” No No No. Your run of the mill VOM (shot for meter, VOM stands for Volts, Ohm, Milli-amps) dosn't read in true RMS. That means that the AC Voltage feature is only actuate at 60Hz. The audio coming from your radio will be from 20Hz to 20,000Hz. So the VOM is not at all actuate. You would have to use a oscilloscope to “see” what the voltage from the pre-amp output is or a True RMS VOM, but as joezero said even with a true RMS meter the voltage fluctuates to much to use. What joezero said about using the high level inputs would be my next step. They will be the little yellow push pin connectors, like the remote input. I hate to bring it back up, but Sony amps are on the some level as there HU. We see them all the time that blow up the first time power was given to them. If I was you I would try to use the high level inputs and if that works run it like that till you can get a better HU. Then when you can, get a better amp.

BTW joezero, you shouldn’t try to get more then 200mA from the remote output wire for the radio. Any more and you risk damage to the HU. If you need more then that use a relay. That way the radio only turns on the relay, but from the relay you could control up to 30A or so.

I’ll also take this opportunity to put out a warning about Pioneer. Their units have gone to crap the past few model releases they have had. I use to say that dollar for dollar you couldn’t do better then a Pioneer, that is no longer the case!

 

That's what I have/had, although I really beat the crap out of my previous head unit anyway, so it's no surprise it sorta died.

 

Going with the the high input will make your sub control useless though. I also think you should watch the amp and make sure none of the lights come on. The point of the rca outputs is to transfer the signal. The only thing the gain controls are for is to match the input sensitivity of the amp to the output of the HU. The point here is not to max out your gain. Turn the gain down and see if it still happens. Play with a lot of the controls of the HU and the amp. Start off by turning all of them down and increase them all one at at time.(and not all the way up) You'll find your problem if you take it one step at a time.

If you're wanting to find a good HU for under a $100, go on ebay. You can get Alpine's lowest model for about $100 on there usually. You can even get a 3-5 year old top notch model for under $100. They are so cheap on there I even bought one for my boat. It's nice having remote control on the boat.