FAO Matt Ion

[Simon Dean]

You were curious about my speaker locations, well, here are the speakers
I just changed in the rear:

http://www.flickr.com/photos/sjdean/sets/72157594509228558/

Car is a 94 Nissan Primera, I believe that's closely related to the
Infinity G20...

5.25" in the rear, 6x4" in the front...

Cya
Simon

[Matt Ion]

Simon Dean wrote:
> You were curious about my speaker locations, well, here are the speakers
> I just changed in the rear:
>
> http://www.flickr.com/photos/sjdean/sets/72157594509228558/
>
> Car is a 94 Nissan Primera, I believe that's closely related to the
> Infinity G20...
>
> 5.25" in the rear, 6x4" in the front...

Ugh, yeah, that's gonna be really tricky to seal properly. You'd probably get
better bass response mounting speakers right in the parcel shelf (we used to do
that a lot with 6x9s in the Civic hatchbacks, when I was installing
professionally in the early 90s - it worked... "okay". Better than putting the
6x9s in those little wedge boxes).

I don't think you'll get any significant bottom end out of this setup - between
the small cones and the poor isolation, there's just not a lot to be had. Small
sub in a box that will fit in the corner of the hatch area or something is
probably the best bet to fill out the bottom end.

[Simon Dean]

Matt Ion wrote:
> Simon Dean wrote:
>> You were curious about my speaker locations, well, here are the
>> speakers I just changed in the rear:
>>
>> http://www.flickr.com/photos/sjdean/sets/72157594509228558/
>>
>> Car is a 94 Nissan Primera, I believe that's closely related to the
>> Infinity G20...
>>
>> 5.25" in the rear, 6x4" in the front...
>
> Ugh, yeah, that's gonna be really tricky to seal properly. You'd
> probably get better bass response mounting speakers right in the parcel
> shelf (we used to do that a lot with 6x9s in the Civic hatchbacks, when
> I was installing professionally in the early 90s - it worked... "okay".
> Better than putting the 6x9s in those little wedge boxes).
>
> I don't think you'll get any significant bottom end out of this setup -
> between the small cones and the poor isolation, there's just not a lot
> to be had. Small sub in a box that will fit in the corner of the hatch
> area or something is probably the best bet to fill out the bottom end.

I've never fancied the idea of mounting speakers in the parcel shelf.
What happens when I want to remove the parcel shelf?

Some sub boxes as you say might be the best bet. Or hell, even just some
speaker boxes with some 6x9's or something boot, trunk, or boot real
estate is a bit limited.

Cheers
Simon

[D.Kreft]

On Feb 2, 3:14 am, Simon Dean > wrote:

> I've never fancied the idea of mounting speakers in the parcel shelf.
> What happens when I want to remove the parcel shelf?

Well, then, you'd kinda be without rear fill for a while. :-)

> Some sub boxes as you say might be the best bet. Or hell, even just some
> speaker boxes with some 6x9's or something boot, trunk, or boot real
> estate is a bit limited.

I don't think 6x9's in boxes are going to be the best thing for you
here for reasons that I went into here:

http://groups.google.com/group/rec.audio.car/browse_frm/thread/a21dbf97ff381c45/1bce3cf3198b504e?lnk=gst&q=6x9+box+Vas+free-air&rnum=1#1bce3cf3198b504e

Six-by-nines are typically designed to be used as "full-range"
speakers--they at least have tweeters, which would be completely
wasted as soon as you put your cargo cover on.

One cheap thing you could try which might buy you a *slight*
improvement in the sound of your rear speakers is to jam as much
"loose" (i.e. not sheets) polyfill as you can into the little cavities
surrounding your rear speakers. The idea here would be to try to
dampen resonances behind the driver and perhaps even lessen the amount
of acoustical energy you bleed from behind the panels to the listening
area. I don't guarantee it'll work, but a bag or two of polyester
fiber is pretty cheap and it certainly won't do you any harm. Try
doing one side at a time and use your balance control to see if you
notice a difference from one side to the other.

But ultimately, Matt is totally correct when he says not to expect too
much from a 5.25" woofer, especially in *that* space. Your best bet,
if you're looking to improve your system's low-frequency response, is
to look into using a small subwoofer. The problem you're then going to
have is that with virtually no midbass in the vehicle, it's going to
be really difficult to get a well-rounded sound with good-sounding
bass (i.e. not "thuddy" or "sloppy-sounding"). The way the human brain
interprets sound makes accurate and powerful midbass reproduction
absolutely critical for your subwoofers to sound good (note that I'm
saying "good" and not "loud"). You can compensate for this somewhat by
using a higher crossover point between your mids and your sub(s), but
then you start running into problems with voices coming out of your
subwoofer, which can sound really awful...not to mention the fact that
it drags your soundstage into the back of the vehicle (i.e. you've got
your back to the musicians at a concert).

Tough car and a tough situation. As long as you keep your expectations
low you should be able to get some decent sound out of it, but if
you're a nitpicky perfectionist, it's going to take a lot of money to
get a really good system in there.

-dan
>
> Cheers
> Simon