Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!

[harry10]

Originally Posted by greenhorn

5" in door chalega, but if you want the max, then i'd suggest 6". may drive up the costs though spacers etc. Since you want to keep your costs down, i suppose 5" will do fine. Remember to budget for some damping. the indigo door panels vibrate like crazy

True. thanks for the info. Will do some research this weekend and will get back on this.

[DjNik]

How much of difference do pre-outs make For eg-2V, 2.5V,4V.Please gurus if you could explain.
Thanx in adv.

[Magma]

dear gurus

please explain merits/demerits of running a set of 4 ohm component speakers in parallel through a bridged output (2channel) of a 4 channel amp
consider a 60*4 rms amp and when brdged gives output of 180 rms*1 @4ohms and consider it STABLE at 2ohms.consider any op at 2 ohms
P.S:can this be done


versus
running the components off seperate channles ( i.e sepertely supplying them 60 rms - the regular way no bridging etc)

wouldnt the first method provide more power to the components. and would they not play cleaner.?

if so why does everyone not use this method? ( as far as i see, they only might loose left and right fader control-so what.)
Also above is true only is the amp is stable at 2ohms.

Actaully the above can be done using a mono or 2 channel also na?

navin,B&T,Sam greenie,Dr alte bhai and all please comment

[greenhorn]

among other things, You'll end up with a car mono system instead of a car stereo system ! All stereo information - the sound stage etc will be lost

Another option would be to bridge the front/rear channels together instead of left/right . Loss of front/rear fader control is more bearable compared to loss of stereo sound!

The the second part, Louder, yes, cleaner ? no

bridging would bring in more distortion, cut damping factor in half , and stress the amp more,

But for a pure SPL setup on a budget , it should work (and you can save on the wiring too, one less pair of RCA's , and one less pair of speaker wires!)

[naturaldisaster]

hi guys,

i was wondering, how is the JBL 1204 BR as a product?

is it worth buying? how much should it cost in delhi?

thanks
ND

[navin]

Originally Posted by Magma

consider a 60*4 rms amp and when brdged gives output of 180 rms*1 @4ohms

in addition to what "greenie" posted..
you cannot bridge a 4ch amp into 1 ch. you can bridge the amp to 2 channels which means that you can only connect 1 pair of speakers unless you want to loose your front/rear or left/right panning options.

[Bass&Trouble]

Originally Posted by Magma

please explain merits/demerits of running a set of 4 ohm component speakers in parallel through a bridged output (2channel) of a 4 channel amp
consider a 60*4 rms amp and when brdged gives output of 180 rms*1 @4ohms and consider it STABLE at 2ohms.consider any op at 2 ohms
P.S:can this be done

There are not many amps that are stable running 2 ohms bridged. And you will either get summed mono (which is bad for full range L-R speakers setups), or just single channel information , depending on how you conifig it.

[Magma]

Originally Posted by navin

in addition to what "greenie" posted..
you cannot bridge a 4ch amp into 1 ch. you can bridge the amp to 2 channels which means that you can only connect 1 pair of speakers unless you want to loose your front/rear or left/right panning options.

sir
i was talking of bridgind 2 channles of a 4 channel amp and then running a pair of component speakers in parallel through this bridged output
i dont want to bridge all 4 channels to get 1 chanel.
my mistake typing 180*1 @ 4ohms

[valhallen.282]

@magma please correct me if i'm wrong you are saying you want to bridge the front and rear of left and right each and make it only stereo but connect two pairs of comps in parallel?

[MadhuG]

Team BHP,
I plan to buy a DVD player for by Santro. However the car already has a cassette player along with FM radio etc. installed in it. I shoud I go ahead with this? Should I purchase a totally new DVD player or are there any options available to upgrade/add an extra DVD player facility to the existing player?
I belong to Chennai and if the above facilities are available where would I get it from?
Thanks

[navin]

Originally Posted by MadhuG

I plan to buy a DVD player for by Santro.

Why DVD? If you dont need Video a CD/MP3 player will do just fine and save you a few bucks too. Your old cassette player might not be upgradeable. A few cassette players had the option of adding a CD/VCD changer to but you need to get the appropriate changer which I believe might no longer be available.

[Magma]

Originally Posted by valhallen.282

@magma please correct me if i'm wrong you are saying you want to bridge the front and rear of left and right each and make it only stereo but connect two pairs of comps in parallel?

yep
thats what i think greenie is suggesting.
i think what i was suggesting surmounted to giving a mono signal but what greenie suggested makes a little more sense

[valhallen.282]

i kind of expected that but at the end of it unless both the comps were in one location in the car it wouldn't really make too much of a difference except making the sound a lil more distorted would it?

[Magma]

Originally Posted by valhallen.282

i kind of expected that but at the end of it unless both the comps were in one location in the car it wouldn't really make too much of a difference except making the sound a lil more distorted would it?

sorry
i didnt understand this.
please explain

[Sam Kapasi]

Magmesh Singh!!

First - get your concept basics correct. Listen very carefully.

When you take a 4 ohm speaker and run it on a single channel - the amplifier "sees" the load as 4 ohms. (Logical)
When you take a 4 ohm speaker and run it bridged, the amplifier "sees" it as a 2 ohm load per channel.
When you take 2X4 ohm speakers in pyarelal, you effectively have 2 ohms. But when you run that 2 ohms load on a bridge, the amplifier "sees" it as a ONE ohm load per channel.
So you need a one ohm stable amplifier.