djfrestyl

iTrader: (89)

The rear amp/sub are an integrated unit. You can probably find one in the classifieds section.

cstarboi

I have a 6th gen and just installed the pioneer avh-p2300 with the metra 75-7551 harness but the output levels sound really low and kinda distorted. I realized that the rear subs are connected to the rear speaker lines but i can select only one setting for rear speakers on the HU, either rear full range or subwoofer. The full range setting gives me some bass in the subwoofer but not anywhere near what I used to get from the stock HU, now when i switch to subwoofer mode the rear speakers dont work but the subs begin pushing much better and i can adjust the bass level thru the unit easily. Im trying to get all the speakers working and the subs pushing really good. i just ordered the scosche slc-4 and hope that will fix the problem. but i want to figure out how do i tweak bass settings thru my new HU without distorting the rest of the speakers. do i use the EQ or what?

djfrestyl

iTrader: (89)

You can start by not posting the same thing in three different threads.

cstarboi

sorry but i am a noob and it wont let me start my own thread so i posted it a few times. i didnt kno the right place to post it

djfrestyl

iTrader: (89)

Noobs can't post new threads because often times their questions have been answered at least a hundred times before. This restriction is by design - it encourages SEARCH.

Yea, sounds like you're going to have to use the EQ to adjust the subwoofer frequencies.

cstarboi

thank you, the lowest frequency i can adjust on the EQ is 100hz and im guessing i need to be increasing frequencies 20hz-80hz for subs?

djfrestyl

iTrader: (89)

Correct.

Sounds like your HU is missing some serious EQ capabilities...

cstarboi

i can adjust the lower frequencies for the subwoofer but only when i select subwoofer as my rear speakers then the full range rear speakers dont work because off the in line crossover. the only solution is see to this is either i place some manual device to control the lower frequencies going to the rear or is it possible to send two inputs to the rear, a low frequency range and a high or full frequency range?

djfrestyl

iTrader: (89)

Ok then let me correct myself.

Sounds like your HU is missing some serious FUNCTIONAL capabilities.

You should be able to send a full range signal to the rear, and be able to EQ that entire range.

I just looked at a picture of the back of your deck. You're using the SW RCA outputs for your rear speakers. This is your issue. The SW outputs are tied to that EQ limitation. The Scosche unit should resolve your issue because it will use the full range rear speaker outputs (speaker wire, not RCA)

Report back once you get the Scosche installed.

cstarboi

yea i was thinking the same but how will i be able to adjust the sub levels like how i used to do on the factory unit?

when i choose subwoofer as rear speaker output on my HU it opens up the option to make adjustments to the SW levels and turn on the low pass filter. this is the exact functionality im looking to have.

but the problem is if i enable this i dont get anything coming from my rear full range speakers.

Thanks so much for your help so far.

djfrestyl

iTrader: (89)

That's because you're not using the rear speaker output on your HU (which are your speaker wire outputs), you're using the RCA outputs through the 70-7551.

Switch the Scosche (essentially all you're doing is switching formats) and you *should* be fine.

cstarboi

but now wouldnt i need the 7550 harness to use the scosche slc4 properly? because i was just thinking of running the speaker wires coming from the HU harness into the SLC4 and then using the RCA ouputs on that to connect to the same 7551 rcas

Man this is getting so confusing lol , The problem is the HU only allow either subwoofer signals or rear full range signals to be output from the rear speaker lines and preout. It seems that the subs are connected to the rear speaker factory wires and these is a crossover that separates the signals so the rear gets the highs and the rear subs gets the lows.

im thinking can i set the rear output as subwoofer and also feed the front inputs to the rear so the rear full range speakers catch the highs and the subs will catch the lows?

djfrestyl

iTrader: (89)

You will still use the 70-7551. The Scosche has RCA outputs.

For signal:
Aftermarket HU -> Aftermarket harness -> Scosche -> RCA's on the 70-7551 -> Car

For power:
Aftermarket HU -> Aftermarket harness -> 70-7551 -> Car

No. You will set the HU outputs to FULL RANGE SPEAKER OUTPUTS. Let the car do what it's already designed to do and use its own crossovers. Don't feed two signals into one input.

cstarboi

ok cool thanks much, i will hook it up like that but i just wanted a way to control the sub levels from the HU itself.

It seems like with this setup i will just have to take whatever levels i get since the EQ wont let me tweak low frequency signals

djfrestyl

iTrader: (89)

Yea, seems like the HU has its limitations.

It should be fine though. Aftermarket HU's generally make the Bose system sound better.

Peabo5000

cstarboi, you want that setup but you're limited by your headunit. It needs a high pass filter setting. alot of pioneers have this
To truly control your sub level and remove the low freq from your full-range speakers you need a headunit that has a high-pass filter.......
To really really have it right....You also need a headunit with 3 pre-outs (you only have 2) plus an external amp&sub running off that 3rd pre-out. Units with only 2 pre-outs have to use that rear for full-range and sub, they are also assuming you're pushing the sub using an external amp n if this was the case you'd use a 4channel amp with the high pass filter set on your rears and the other 2ch pushing the sub so then when you increased the bass(sub level) it 'd only pass thru to the 2ch pushing the sub.

cstarboi

exactly what i was thinking, the HU also has a low pass filter when the rear speakers are selected as subwoofer output.

i read somewhere that the factory subs run a summing signal consisting of rear full range signal and the sub signal.

So my thinking is why cant i just run the signal from the front speaker and the subs into the rear speakers output since they get separated by the factory amps. and then i could turn on the high pass filter for the fronts and turn on the low pass for the subs.

Any comments on this method?

cstarboi

Also are there two speaker wires in the factory harness for the subs only?

djfrestyl

iTrader: (89)

There are no separate wires for the sub in the harness in the dash.

cstarboi

so can i send a high freq signal and low freq signal to the rear outputs? i think its called bi-amping

cstarboi

or is there a device that allows me to input 4 channels and ouput 2 channels? like some 4 channel mixer or some signal summing device

djfrestyl

iTrader: (89)

You're not going to blow anything if you twist two signal wires together, as long as they're the same polarity.

cstarboi

got the scosche unit today, might install it today or tomorrow, will let yall know how it goes

cstarboi

so i installed the scosche unit and adjusted the gains and all i gotta say is wow sounds so much better than using the pre outs from the new HU, and i used 4 y-cables to sum up the signals to get full range going to the front and rear door speakers and sub signal goin to the subs. sounds great, even better than the stock HU. turned on the low and high pass filters on my HU and they even sounded better.

billun1063

I have been reading this thread and another talking about the stereo config for my 2001 Maxima Special Edition. There are 4 speakers (one in each door) and a sub (I assume) in the rear window. There is a Bose amp in the trunk. On it it says Amp Assy 28060 2Y910. There are no other speakers in the car. Would this be the system with amps for each speaker or is this amp being used for all speakers?

djfrestyl

iTrader: (89)

2000-2003 has two amps total.

The square one mounted underneath the rear deck powers all 4 interior speakers.

There is another which is not as obvious. It is the subwoofer amp mounted directly underneath the subwoofer itself (on the rear deck). It's a circular black plastic enclosure. The subwoofer and its amp can be removed in one piece.

billun1063

I am thinking of putting all new speakers and sub in. I understand the Bose issue with the 1 omh vs 4 ohm for aftermarket. The guy who had this before me put a Sony stereo in it and my son says it doesn't sound good. I don't know how he hooked the Sony up - which I will need to check on. What I am wondering is if I can just get rid of the amps and hook speakers directly to Sony? Is there issues with wiring?

djfrestyl

iTrader: (89)

Are you installing an aftermarket amp with your new speakers or just replacing the speakers?

Personally I'd advise you to get a proper head unit and make sure it's installed correctly. It *should* bring out the potential in your Bose system. The HU is your initial interface to your audio and should always be addressed first.

Then if still inadequate, decide how you want to replace the rest of the system.

Where are you located?

billun1063

I am in Kansas. Haven't decided what to do. I read that if I use the pre-amp outs on the head unit that should work with the Bose system.

djfrestyl

iTrader: (89)

Correct, or you can use the line level outputs in conjunction with an LOC.

The deciding factor on which method to use is the voltage of the pre-amp RCA outputs from the head unit.

billun1063

Sorry to be stupid but what is LOC?

djfrestyl

iTrader: (89)

Line Output Converter, it's discussed in this very thread.

jmtz93

I have a 2000-2003 Nissan Maxima Rear Deck BOSE Speaker with Speaker Assembly that I removed from my maxima for sale on ebay check it out


http://cgi.ebay.com/ebaymotors/_W0QQ...#ht_500wt_1182

djfrestyl

iTrader: (89)

Good luck getting $100 for that...users on this forum know better.

eBay buyers however, probably don't.

Also, the model # in your auction is wrong. the Nissan part # is the 28130-2Y900. Might want to change that...

billun1063

So djfrestyl, what should the voltage be for the pre-amp RCA outputs?

djfrestyl

iTrader: (89)

4v or above, you don't need an LOC. Anything below, you do.

This is a rule of thumb I go by. Others have reported different successes/failures.

aliraza455

Hey guys, i am new here, iw ill appreciate your kind help!
well i have a nissan maxima 1996, i am having a problem with right side speakers of my car, they are not working (sometimes they start working by themselves for a couple of minutes).

I thought that theres some problem in wiring or in the radio that is not transferring the sound to the right side speakers, as front and rear (right) speakers, both are not working, but the guy told me that the amps on both the speakers have gone bad, you either have to replace it and it will be expensive, or u can bypass the amps and make a direct connection, but the soon will not be as good as before!

This forum seems to be a nice one, so i wanted to ask, if the amp is the problem or its something else, becasue sometimes the speakers do work.
and if amp is the problem can anyone guide me to a nice place where i can get those amps with good quality.
And please also tell me if the problem is anything else but the amp, and if you have a better solution then tell me also!

thanks guys, i appreciate this forum!

and can u also reply on aliraza455@hotmail.com, incas i cannot catch up regularly as i am moving to houston!

djfrestyl

iTrader: (89)

I'm going to suspect your issue is your radio. It's not common for two of the amps to go bad.

billun1063

OK so if I want to replace my speakers and eliminate the amps - is there a way to do that without running new speaker wires. Can you use the plug that goes into the main amp and connect the input signal wire (for each speaker) to the outputs?

djfrestyl

iTrader: (89)

Yep that's exactly what you do. Isolate the signal wires going into the amp, extend them using the wiring that comes with your aftermarket speakers, and connect direct.

However, you will have to replace your OEM head unit for this to work. Otherwise the signal will be unamplified.