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Thread: Rear Fill: do you use it? Reply to Thread
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Topic Review (Newest First)
1 Week Ago 07:49 AM
lpreston
Re: Rear Fill: do you use it?

I'll snap a pic of the pod today.
1 Week Ago 04:14 AM
Phil Indeblanc
Re: Rear Fill: do you use it?

very well explained, thanks. It makes good sense.
1 Week Ago 03:11 AM
cajunner
Re: Rear Fill: do you use it?

Quote:
Originally Posted by Phil Indeblanc View Post
doesn't that cause reflections that I keep hearing(reading) about with dash mounting mids and such?
for surround, you want diffuse, non-specific ambient modes like what you'd hear in a room that has had the rear wall bounce, and return.

a wall bounce gives a set attenuation, plus the distance loss from running to the back wall and returning to the listener position.

this is what you are trying to reproduce, the front stage is all about pin-point imaging and center focus, while the rear attenuated splash of reverberated tones is best described as room energy.

in this instance, reflections are your friend because it does diffuse the sound coming directly off the speakers, and it increases the path length to your ears which will help a bit for DSP processors that can only give up 10 milliseconds of delay, when you want 20. Most of all, it mimics the actual acoustics of a rear wall bounce, which would be a desirable characteristic of rear fill sound.
1 Week Ago 02:11 AM
Phil Indeblanc
Re: Rear Fill: do you use it?

doesn't that cause reflections that I keep hearing(reading) about with dash mounting mids and such?
1 Week Ago 07:09 AM
lpreston
Re: Rear Fill: do you use it?

One of the best systems I ever had used rear fill. I stole the concept from an Iasca winner.

I built a pod to mount on top of the rear deck. Speakers aimed at the rear window at about a 30 degree angle.

Worked so well, I am doing the same on the current build.
1 Week Ago 01:43 PM
gstokes
Re: Rear Fill: do you use it?

Quote:
Originally Posted by bobditts View Post
keep the 4channel and bridge it to the fronts or run full active
The majority of 4-channel amps don't have a bandpass filter so the OP would need an head unit with 2-way network or an discrete active crossover..

That's why i love 5-channel amps, they got everything you need to go active with front stage..
1 Week Ago 10:48 AM
Phil Indeblanc
Re: Rear Fill: do you use it?

I use rear fill mostly for the kids and cut the front so the Frozen soundtrack doesn't have me going nuts that much.

I also thought I would enjoy rear fill if done right. My car before this I added rear fill and never used it. This car I added rear fill also.

This car the rear doors take the tweeter by the door handle. I'm a tall guy so my seat is pretty far back and the rear tweeter is right below my ear/slightly back of. SO this creates a problem. I have other presets made for this. 1 with only front and 2 with a little rear fill. I think if you use just the upper or the very lower frequencies it can help fill in these "extremes" in a surround way. But I have to do a lot of tuning to get that done, as I think a pro tuner would find it odd or against the grain.
1 Week Ago 09:55 AM
silber956
Re: Rear Fill: do you use it?

I have rear fill but only playing 80-1200.
1 Week Ago 08:57 AM
Qmotion
Re: Rear Fill: do you use it?

I'm actually in the process of having my system re-installed now. It will be all digital from head unit back. Full active 3-way front. In intend to utilize a mono rear fill based off a center channel source. Everything will be time aligned. I'll play with the delay values and such once everything is together. I'll save one preset without the rears perhaps for competing. Of course it all depends on how the tuning works out.

Being that it's just rear-fill for ambience affect I intend set perimeters for the rear to be down about 6db from the front and about 20ms delayed. I'll post how it sounds when all done.
1 Week Ago 08:11 AM
I800C0LLECT
Re: Rear Fill: do you use it?

Quote:
Originally Posted by subterFUSE View Post
Last car I did rear fill in was my first car in 1995.

I find it unnecessary. It add extra expense in both speakers and channels of amplification.


Sent from my iPhone using Tapatalk
What was your version of rear fill? Was it ambiance?
1 Week Ago 05:18 AM
subterFUSE
Re: Rear Fill: do you use it?

Last car I did rear fill in was my first car in 1995.

I find it unnecessary. It add extra expense in both speakers and channels of amplification.


Sent from my iPhone using Tapatalk
1 Week Ago 04:11 AM
Qmotion
Re: Rear Fill: do you use it?

Rear fills give me the full sound that I like.
07-22-2013 11:06 AM
avanti1960
Re: Rear Fill: do you use it?

recently switched off the rear full range, time aligned components. possibly doing an about face on the benefits of rear fill, in my case rear fully active.
the trial centers around the idea that I have been missing out on the best possible SQ and hearing destructive or comb filtering interference. this surfaces as occasional harshness or distortion that i had assumed was caused by not having a high end amplifier.
after a few days of running with muted rear channels and a trial re-tune for front stage only- some observations:
1) seems much easier to tune a front stage only. after a few EQ repositions I had the system sounding better than ever but not fully refined yet.
2) the stage seems narrower but better focused
3) learning not to miss the benefits of rear drivers- an incredible spaciousness and 3-dimensional field of coverage- in favor of better overall sound quality / cleaner sound.

I'll continue to refine the tune and see where it takes me- will front stage only stay or go?
Attempts at using decoupled, delayed band passed rear fill are also possible.

I would love to add a dolby surround processor- turning the rear drivers into surrond logic speakers- but the only outboard processors that include it are significant investments- e.g. MS-8 and the PXA-H800 plus controller. most likely will not happen.
Pioneer used to make an outboard Dolby surround box- this would be a nice cost effective option but currently unavailable.
12-25-2012 05:15 PM
Mike 01Hawk
Re: Rear Fill: do you use it?

I'm running my stockers off HU power, AVH-P4400BH, faded to the front quite a bit. Eh <shrug>
12-20-2012 05:00 PM
momofx
Re: Rear Fill: do you use it?

Rear fill without proper processing depends on the actual vehicle's interior acoustics and most importantly, wether YOU think it sounds good to YOUR ears or not! In my years as an installer, I must say that most people prefer rear fill. When done correctly, it can sound pretty good but then again thats how I feel and another person might think otherwise.

Personal preference - that's why we are all made differently
11-25-2012 09:56 PM
quickaudi07
Quote:
Originally Posted by bobditts View Post
if I had the money, i would love to try and tackle the issue. I dont have the control or processing power to get the desired results with rear fill. im really interested to see (if it ever happens) the tear down of Mr. Biggs vehicle and see how his rear fill setup was accomplished.
I have rear fill. And u cant really tell they are on.... but again im usi g H800

Sent from my SGH-T999 using Tapatalk 2
11-12-2012 06:05 PM
avanti1960
Re: Rear Fill: do you use it?

has anyone tried using time alignment to delay the rear speakers and create a concert hall effect?
11-12-2012 12:24 PM
emperorjj1
Re: Rear Fill: do you use it?

Quote:
Originally Posted by JT34237 View Post
I listen to Electronic Music which doesn't have a "stage" as this website describes it...

What is Sound Quality and How is it Judged | Tutorials | Team Audionutz

I've been to shows where they did have speakers ALL AROUND YOU not just in the front. Anyone else listen to this genre of music and still enjoy without using rearfill? I want that same "ALL AROUND EFFECT" that I get at the shows.
just use rear fill then. at the end of the day if you like how it sounds then thats all tha matters
11-12-2012 07:22 AM
aranawhite
Re: Rear Fill: do you use it?

I like the rear fill, i know it doesn't image properly but i'm used to surround movies and the rear fill just feels better. I haven't been able to tweak a proper front stage anyway and if it's not right i definitely like the full sound of the rear fill.
11-10-2012 04:13 PM
JT34237
Re: Rear Fill: do you use it?

I listen to Electronic Music which doesn't have a "stage" as this website describes it...

What is Sound Quality and How is it Judged | Tutorials | Team Audionutz

I've been to shows where they did have speakers ALL AROUND YOU not just in the front. Anyone else listen to this genre of music and still enjoy without using rearfill? I want that same "ALL AROUND EFFECT" that I get at the shows.
05-09-2012 01:01 AM
emperorjj1
Re: Rear Fill: do you use it?

im confused by that statement
05-08-2012 11:09 PM
gtsdohcvvtli
Re: Rear Fill: do you use it?

hows this for an idea.......

4 door sedan. Rear speakers are in the rear doors

For rear fill, 1 way mid bass driver band passed for mid bass only
02-20-2012 07:58 PM
questi1
Re: Rear Fill: do you use it?

Quote:
Originally Posted by EeeDeeEye View Post
I have a Sony Mobile ES system and it offers several surround sound options, so I'll be using rear fill to take advantage of that.
Hey, what kind of HU / Processor are you running? I know some of the lower processors like the XDP-U50d have surround options, but i never gave it much thought.
01-21-2012 04:53 AM
Tdx_Kid
Re: Rear Fill: do you use it?

i totally agree with wrx/sti, plus having a nice front set up can definitely give you the eargasm you desire, having the right set up
i dont use rear fill and dont ever plan on it, but that's my opinion
01-17-2012 08:56 PM
rallypoint_1
Re: Rear Fill: do you use it?

No rears. My car, a 1990 civic, is small. I used to run rears but always sounded weird. It was messing with the front stage.
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