Speaker issues
 

Hi Guys,

Yesterday me and a mate re-wired my car sound system. All[U][/U]though the issue that we were hoping to resolve is still happening. Basically ive got a JVC head unit KD-G515 (4x50w), 2 front focal speakers (working great) and 2 rear focal 130 CA1 speakers. The rear speakers are only getting sound to the tweeters, which is a little strange. Is this because there is a lack of power going to them? I would have thought the head unit would be able to provide them with enough.

this is a spec sheet of the 2 rear focal speakers:

[url]http://www.focalaustralia.com.au/pdfs/acc_130CA1.pdf[/url]

Thanks in advance

Does your JVC unit have an equaliser or some other setting like high or low pass filters turned on? You might have the filter set at something like 250Hz which would mean the rear woofers are doing SFA. Worth checking.

Also just to be sure the voice coils aren't shagged press GENTLY on the woofer cone while playing music. If it comes to life then you need new speakers.

HTH

[QUOTE=phizzle;478369]Does your JVC unit have an equaliser or some other setting like high or low pass filters turned on? You might have the filter set at something like 250Hz which would mean the rear woofers are doing SFA. Worth checking.

Also just to be sure the voice coils aren't shagged press GENTLY on the woofer cone while playing music. If it comes to life then you need new speakers.

HTH[/QUOTE]
ive tried the pushing on the woofer cone, no difference. I don't think my head unit has those options.

crossovers dead?

found this info on the head unit:

Maximum Power Output:
Front: 50 W per channel
Rear: 50 W per channel
Continuous Power Output (RMS):
Front: 19 W per channel into 4 Ω, 40 Hz
to 20 000 Hz at no more than 0.8%
total harmonic distortion.
Rear: 19 W per channel into 4 Ω, 40 Hz
to 20 000 Hz at no more than 0.8%
total harmonic distortion.
Load Impedance: 4 Ω (4 Ω to 8 Ω allowance

not sure if that helps.

have you tried the speakers on something else?

[QUOTE=Alternate;478387]have you tried the speakers on something else?[/QUOTE]
that was the next step or to try other "lower" power speakers. I don't have anything to test the speakers on.

That head unit has a high pass filter.

here's the lowdown;
[B]Settings: WOOFER*1 Subwoofer cutoff frequency

LOW: Frequencies lower than 55 Hz are send to the subwoofer.
MID: [Initial]; Frequencies lower than 85 Hz are send to the
subwoofer.
[U]HIGH: Frequencies lower than 115 Hz are send to the subwoofer[/U][/B]

Check to see if the sub is set to HIGH, this sends all frequencies below 115hz to the sub and everything above 115 to the rear speakers.

[QUOTE=Rossco;478397]are they secondhand?[/QUOTE]
They were in the car when i bought it. So i am not sure.

Sorry bud ninja edit....See above ^^ :)

[QUOTE=Rossco;478414]Sorry bud ninja edit....See above ^^ :)[/QUOTE]
thanks mate, i can't seem to find those settings on the unit :S. Woofer dosnt appear, is that because theres not one attached?

the settings on this head unit seem to be limited, unless i am missing something?

Sometimes there's a physical switch on the back/sides of the head unit casing ie you may have to pull the head unit out.

[QUOTE=Gordon;478427]Sometimes there's a physical switch on the back/sides of the head unit casing ie you may have to pull the head unit out.[/QUOTE]
ive checked, theres nothing

Hold down the volume button for 2 seconds see if it beeps, or power button or any other action sort of a button. mSometimes they are hidden in there if it's not obvious on the face plate.

[QUOTE=phizzle;478430]Hold down the volume button for 2 seconds see if it beeps, or power button or any other action sort of a button. mSometimes they are hidden in there if it's not obvious on the face plate.[/QUOTE]
ill give it another shot now. Ive tried for about 15-20min with no luck previously, but who knows.

only thing i can find is:

AMP GAIN: Low or High

Tried both settings, same thing.

I'd try one of your speakers on another source...Someone may have cut one wire on each woofer to use them as rear-fill only.

[QUOTE=Rossco;478445]I'd try one of your speakers on another source...Someone may have cut one wire on each woofer to use them as rear-fill only.[/QUOTE]
the wires on the speakers/woofers look fine. But yeah ill need to find someone who can test the speakers for me. thanks for your help