5 replies to this topic

[MrMally]

On my old holden, its original speaker loacation for the front was a single speaker (7"x5" i think) located at the top middle of the dash.

Would i be able to use this location for maybe a midrange or even mid base.
Or would it be two high up.

[Matt VIP]

the location would be perfect, however you'll need to make some decent modifications to make it work well.

1) you'd have to build an enclosure behind the speaker. Wouldnt need to be too voluminous, maybe a couple of litres? I'd make this out of fibreglass around a chicken wire or mdf frame? someone else could tell you how to do this though...

2) you'd have to make sure that the sound is not getting splayed everywhere by the windscreen if you're using a speaker with tweeters. I'm thinking some sort of waveguide style thing? Other option is to use a midrange/midbass speaker with both high and low pass on it.

3) ideally you only want centre channel information running though it, unless this is the only speaker in your front stage (ie not running speakers in the doors/kicks etc). Can your processor do this?

4) check shiny_car's build for the installation of his centre channel. very schmnicko!
http://www.mobileelectronics.com.au/forums...mp;#entry682759

[MrMally]

Oopps i forgot to post what i have, sorry.

-Alpine 9887 head unit
-Alpine MRV-345 amp running front and rear channels (may upgrade to pdx)
-Alpine MRD-M605 amp running subs
-Alpine Type S splits front in custom door pods/ arm rest (may upgrade to Type R splits)
-Alpine Type S splits (older model) rear in custom parcel shelf (may upgrade to Type R 2 ways)
-2x Alpine Type R 12" subs in custom 4 cubic foot capacity ported boxes

Edited by MrMally, 27 March 2008 - 11:14 AM.

[Matt VIP]

I'd imagine that in your case, spending more money on some great quality front splits (yes, even better than type R!) would be far more worthwhile than anything else at this stage.

do some research on here and other DIY forums about what you need to make a centre channel work well, then reconsider it.

[shiny_car]

yeah, i wouldn't bother with a centre channel with your system at this stage.

myself and TEGBOY - both of us have fitted centre channels as examples - use an alpine PXA digital processor. this provides a dedicated 'downmixed' centre channel output. it also has adjustable active xovers to provide the desired HP and LP (bandpass). add to this, an EQ specifically for this channel which is really important, cos the enclosure you make is going to be far from ideal in most cases, so the frequency response is likely to be rather peaky, and can sound a bit 'hollow'. lastly, the time correction factor helps blend it in with the front L/R channels. so: dedicated channel, xovers, EQ, and time correction. perhaps the only way to make it seamless.

[MrMally]

Okay thanks, ill leave it as it is for now and consentrate on the rest

thank you