Head unit connect

Hi i have an alpine 9857 head unit with 3 sets of outputs 1 set for front 1 set for rear and 1 set for subwoofer i have 3 jl audio amps 450/4 is connected to the front and rear of the head unit the 500/1 is connected to the subwoofer output and the 300/2 is run off the 450/4 i had purchased a esq746 but it only has 2 imputs main and aux how do i get this to work

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3,130 Answers

You will only be able to use this EQ on the front or the rear speakers. You will have to get another EQ if you think you need one. Usually, the front speakers of a car's audio system are the smallest and the rears are larger. You really do not want an EQ on the subs. If it was mine, I would hook the EQ between the head unit and the rear speakers. If you feel this does not sound right, you may need, but I doubt it very much, to get another EQ for the front speakers. Good Luck

Posted on Aug 18, 2007

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1answer

I have a 12" d4 type r 1000 rms and a alpine 1000 amp speaker sounds great but smells like something is burning, my amp never over heats or shuts down but the smell is still coming from the sub?

Cut your gain back on the amp. It sounds like they are set too high. Check your install instructions on how to set your gain. If you have a 4 or 5 volt output head unit your will not be at half way. Im running a JL Audio 500 /1 on a skar wwv10 dvc in a ported box. My gain is set about half way & its plenty loud.I have a Alpine 9887 headunit 5 volt output on my RCAsI can take a volt meter & set my speaker output at 45amps & my gain in perfect.

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Apr 28, 2014 • Alpine Type-R SWR-1242D Car Subwoofer

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1answer

NO BASS!!

1) Check the Subwoofer for continuity - At the subwoofer, one at a time, test the terminals for Continuity using your Digital Multi-Meter; if your DMM doesn't have a Continuity test, use the Resistance, or Ohms, test and check for Resistance in the Subwoofer Coil (be sure to disconnect the subwoofer wiring before performing these tests).
2) If they test out good, hook the wires back up and test the terminals at the terminal cup or at the Amp hookup if you didn’t use a terminal, don't hook it up to the amp yet. Sometimes the wiring inside the box can be a problem if it has come loose, or isn't making a great connection.
3) If you have a Sub or multiple Subs with Dual Voice Coils, or multiple Subs with Single Voice Coils, make sure your wiring is correct by checking here:
http://www.the12volt.com/caraudio/woofer_configurations.asp
4) Make sure there are no Hi-Pass filters, crossovers, or multi Channel switches enabled.
5) Replace your RCA cable/s with known working RCA cable/s from the Source/Head Unit to the Amplifier/s.
6) Check your Head Unit settings; make sure the Bass is turned up and/or the Subwoofer setting is turned On.
7) If you are still getting no or low output, try plugging in an MP3 player or CD player using a headphone to RCA adaptor and check for sound output. If there is still no or low output, your Amplifier outputs are probably burned out.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

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Jul 18, 2010 • Jl Audio 300/2 Car Audio Amplifier

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2answers

Hi i turn my alpine on and i have 2 retune the radio stations i store them but when i get back in my car i have 2 start 2 retune any idears

Probably you dont have the constant pos (+) wire hooked up to hot (+) wire and only to a source that is switched. Switched means every time your key is removed from ignition switch the positive current from that source will also power down. There are two positive leads from the unit, 1 always hot and the other needs to be switchable. The constant hot (usually yellow) powers the memory for your settings. Just like your television set, once you pull the cord off the socket everything returns to default setting.

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Oct 20, 2009 • Alpine CDA-9857 CD Player

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1answer

I have 2 6x9 speakers up front 4 6 1/2 3-ways

Hello rjmiller4039,

Although amps with 5 channels are pretty rare, you can get one. Alpine, Boston Acoustics, Infinity, JL audio, MTX, and Polk all have 5-channels ranging in price from around $350 up to around $1,000. The Alpine PDX-5 will output 75X4 watts RMS for the front and rear stereo channels and 300 watts to the mono sub channel. It is priced at $599.99 at Crutchfield.

Hope this helps.

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Sep 18, 2009 • Jl Audio 500/1 Car Audio Amplifier

1helpful

3answers

Have one wire for audio sub out, but two input ports to amp

This one Wire should be for the +. Try connecting the + to the Head Unit and - to a Common Ground. At the Worst, You will Blow the Amp Fuse if not Correct. The Lead from the Head Unit is Only an Off and On from the Ignition. Please Rate My Response! Thanks!

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Jan 31, 2009 • Power Acoustik PTID-8960 Car Video Player

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1answer

How can i connect an mp3 player on my Power Acoustik PTID-4007

Expandability Options:

3 sets of preamp outputs (front, rear and subwoofer)
Telephone Mute trigger wire for Bluetooth adaptation
iPod Ready: IC-1 iPod Connection Cable Required and Sold Separately
Front-panel auxiliary input: Mini USB input and SD Card slot
Rear auxiliary input: 1 back-up camera input and 1 A/V input
1 Video output

The aux rear a/v input should do the trick.
If it is a component (RCA) type input, you will need a Male 3.5mm to dual Male RCA adapter.
If it is a 3.5mm input, a Male 3.5mm on each end.

I believe you will need the Dual RCA (red/wht) to 3.5mm cable.
The Audio inputs are purple RCAs on the back of your head unit.

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Jan 14, 2009 • Car Audio & Video

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1answer

My powered subwoofer has RCA inputs for four jacks. (two front, two rear) My CD head also has four RCA outputs (2 front and 2 rear). Is there some advantage to connecting all of these with patch cables, or...

the advantage is every time you split a pre-amp signal, the voltage, too, divides in half. Your signal (music) is going down the river at 2 volts say, and when it gets to the amplifier, it is split into 4 streams. The signal will be distorted and the amplifier will not work as efficiently. Use the Front AND rear RCAs so your amplifier uses the best possible signal - for the best possible results!

Also, if you are using 4 RCAs you get true stereo FL FR RR RL Instead of L and R

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Dec 30, 2008 • Jl Audio 500/1 Car Audio Amplifier

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1answer

Weak rear left amp output?

hey whats up bud i got an ALPINE V-POWER MRP-M350 these amps are great go to a walmart od any music shop buy a set of R.C.A cables that plug into your amp than that Ys off to a single connection its a male cable that run a set from the back of your cd player heres the trick ONLY PLUG YOUR BLACK COLORED RCA INTO HEAD UNIT MAKE SURE YOU RAP THE RED ONE WITH TAPE OR GET A RUBBER CAP TO PUT OVER IT SO YOU DONT GET ANY STATIC FREQUENCIES COMING OUT OF THE RED ONE THAN RUN THAT SET TO YOUR AMPLIFIER AND AGAIN ONLY TIE INTO THE LEFT CHANNEL OF YOUR AMPLIFIER.... Hope you know wnat i mean by that Y adapter ther is 2 prongs that tie into amplifier than it splits into 1 were your rca cables will plug into just that one thats how you bridge these confusing amps.... TRUST ME BOTH SUBS WILL SLAM HARD I RUN 2 JL AUDIO OFF OF MINE NO PROBLEM.... WRITE BACK TO ME IF YOU HAVE ANY PROBLEMS OR WHEN YOU GET IT HOOKED UP MY EMAIL ADDRESS IS [email protected] hope to hear from you soon...

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Dec 27, 2008 • Alpine MRP-M350 Car Audio Amplifier

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1answer

I hooked up a 4 ch alpine amp MRP-F600. The back speakers play nice but the front speakers play very low. What could be the Problem?

1)When you connected the amp to the head unit, did you run two pairs of RCA cables for front and rear reference or did you only run one set of RCA cables from the rear out to the amp? 2)If that's not the case and you did ran two sets, on your amp, swop the rear and front RCA cables. If the rears go quiet and the fronts are loud you now know the issue is either in the cables or how the head unit is set up. If the fronts are still quiet, check your Amp's gain, frequency and filter setter settings (if available). If those settings don't change anything you may have a faulty amp. 3)Check speaker connections, seems trivial, but you never know.
Message me back if nothing works and/or you get stuck.
Ciza

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Nov 04, 2008 • Alpine Car Audio & Video

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1answer

Need to know the right setting to apply for my subs

You need to match your amp's input voltage (the gain) to the output voltage supplied via your deck's preouts. Turn you radio up to normal listening level, and turn the amp's gain until you induce audible distortion then back it off slightly. Set the bass boost and crossovers to on and type (highpass for front/rear full range or lowpass for subs).

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Apr 26, 2008 • Jl Audio 12W3 Car Subwoofer

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I have a 12" d4 type r 1000 rms and a alpine 1000 amp speaker sounds great but smells like something is burning, my amp never over heats or shuts down but the smell is still coming from the sub?

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