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Mobile Electronics Australia > Mobile Electronics Discussion > Sound Quality Discussion
ix
i've playing with the location of my tweeters because I have found imaging not so great. I've tried them in all sorts of angles in the dash and in the kick panels but still no good.
Then I realised the voices are mostly coming out of the mids.
My mids are in basically stock positions firing into each other.

I have a problem of the passenger side louder than the other (which annoys me cos the soundstage is dragged to the left)

I have checked wiring and all the + and - connections are all correct because I thought maybe one speaker could of been on reversed polarities and be causing a phase problem, but its not sad.gif

Is there anything I can do?
somehow I don't think new splits will do, maybe with ones with a phase plug in the mids?
golf_bht
may be you can add 4 L-pads to your X over so you can control the volume of all the speakers in your system. maybe the speaker mounting position on the right side of car is too close to the driver legs. maybe the speaker is off-axis too much. what car U R driving?
gooki
Umm, use the balance control on your headunit.
shiny_car
is one side definitely louder than the other? or is there just a soundstage problem?

to confirm if one side is louder, swap the speakers over. it may be a damaged speaker or there may be a problem with the amp or HU. maybe even a dodgy RCA cable.

what car and splits?

smile.gif
Shieldsy
as shiny said check by swapping things around.. if you have an old set od speakers tr y replacing them... find the problem by eliminating all variables one by one untill you have found where the fault lies...
Zed
I've had that same problem with my front stage before. I swapped the left and right speakers and it was still the same. Double checked all polarities, swapped RCAs around, swapped the speaker outputs on the amp around - and none if it made any difference.

Depending on how pedantic you are about it, you can just use the balance control as suggested to centre the image. Or try mucking around with time alignment if you have it.
shiny_car
it's not normal to have an audible L/R volume difference when the 'balance' is centred.

if you're happy to correct it by adjusting the balance then no probs.

otherwise, you'll need to troubleshoot to find the source. it's even possible to be in the recording, so try a couple CDs.

smile.gif
Maz
if u have a look closely at mp3's one channel is slightly louder than the other. Majority of the mp3's out there have this problem to some extent.

Must be the encoding algorithm
ix
hi thanks for all your replies!

splits are focal polyglass 165v's

i'm not happy to just use the balance control...I want to find out what is wrong sad.gif

I've tried changing the rca's on the amp side. No diff. I will try changing the rca on the HU side to see if that helps, and then change the rca cable all together.

I have checked polarity, that was the first thing I've checked as I thought it could be a phase problem.

I have swapped the crossovers (left to right and vice versa) and the tweeters (but problem isn't with tweeters as even the voices are centred and voices are more in the midrange section).

Richard, I'll try and swap the mids and see if that helps later!

If it is a sound stage problem, how could I fix it?
The mids are firing directly at each other
ix
ah another thing
i've only listened to high quality recordings
highway 1's track 14, imaging track
focal test cd #5
eagles - hell freezes over
sting - sacred love
shiny_car
ah ok.

if you've swapped the RCA inputs around (L for R and vice versa) and the problem remains, then the fault is not with either the RCAs or HU. it will be from the amp onwards, incl speakerwires, xovers and drivers themselves.

when you changed the xovers over, did you try using only the woofers and disconnecting the tweets?

is there a huge difference in the length of speakerwiring between L and R? and same gauge/brand?

troubleshooting will take a fair amount of time and effort. so bugger!
*start with swapping the woofers over, L for R. listen again. if the difference in the balance changes sides, it's the woofers; if not, move on
*change the passive xovers across, but keep all else the same. if the difference changes sides, it's the xovers; if not, move on
*change the speakerwiring over (b/w amp and passiver xover). if the difference changes then it's the speakerwires; if not...it must be the amp presuming when you changed the input RCAs over the problem did not swap sides

good luck smile.gif
ix
thanks richard biggrin.gif
when i swapped the crossovers i swapped the tweeters as well to isolate the mids. no diff sad.gif
i will try without the tweeters laster in the afternoon.

i will then try changing the woofers.

then change the speakerwire

i hope its not the amp because i only got my srx3 6 months ago!
ix
oh another thing, i used to run an old alpine vpower f200 4 channel with the same front components and the problem was still there...
i hope its just the woofer!
shiny_car
is it truly something to be worried about?

that is, is it 'obvious' when you play your regular music? or is it something you have to place your head in the centre of the car, playing an SQ disc, closing your eyes, and listening extremely carefully. biggrin.gif

if it's obvious, sure, i'd be worried too. if not, then it is incidental and probably some variance in your equipment.

now, if it was present before you changed the amp, then it's unlikely the amp at fault.

smile.gif
ix
yeah when im listening to music, its very noticable the left side is overpowering(i hear more of the left side of vocals and its not centre)
when i sit in the passenger seat, its becomes apparent the central voice is right in front of the passenger seat when seated there

when in the driver's seat its slightly to the left, but very noticable.

when i put my head to the centre, it sounds better, but i find its not as clear anymore

i hope i don't have a problem of destructive/contructive waves...
shiny_car
QUOTE (ix)
i hope i don't have a problem of destructive/contructive waves...


yeah, i guess this is a possibility as you've considered earlier. best way to prevent it is to have angled speakers you may need some angled pods/baffles for the woofers.

still, exclude all other causes first.

smile.gif
ix
ok
just rewired the mids (new wiring), and no diff
swapped the mids, no diff

if i set the balance to +1 to the right, it helps move voices to the right, but the midbass on the right side is audibly stronger =/

my interior is in bits! sad.gif

would TA fix these kind of problems?
i'm not keen on paying $600+ for a headunit's feature's I can't try out to see if it will solve my problems before I buy...
Fudd
/me lends carl my amp biggrin.gif
ix
biggrin.gif
u got a TA unit lying around anywhere too Rob? biggrin.gif
Fudd
TA is for ppl who cant setup there system propery tongue.gif
ix
you know what you gotta help me out with then smile.gif








redo the pods tongue.gif
Fudd
yeah come on over, i need help moving the tweets here (read: i cant be f***ed doing it myself)
ix
looks like Tuesday night is a good night smile.gif
Fudd
looks like ill be playing vollyball tuesday night tongue.gif

pick another, or talk to me on ICQ tonight when im home (abour 15-25min)
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