what to do with rear fill/speakers...

boogiem0nst3r · Post by **boogiem0nst3r** » Tue Sep 15, 2009 2:24 am

setup:

Deck: ALpine cda 9856
Amp: Jl 500/1, Phoenix Gold RSD 300.4
Front: Phoenix Gold RSD65cs (component)
Rear: Phoenix Gold RSD65 (coaxial)
Sub: Phoenix Gold RSD12D
Car: Camry 2004

Currently I have only the front speakers hooked up (although both front/rears are mounted). I have the 300.4 bridged sending all the power to the fronts (passive).

The rear, what should i do with it, and how should i Manage this? Should I just leave it mounted should I decide later I want to hook them up? If I want to hook them up but still want to keep the main power to the front, should I just run the rear off deck power? If so is there a way to properly do this? The only feature son my deck to control output of internal amp is either on or off. If i were to use deck power, I want the rear just so it becomes barely noticeable, not sure how to do this.

I want to keep it bridged because its 48x4 vs 160x2...quite difference in power...

I have rear on some forums that the rear speakers should just be removed altogether to allow the bass from the trunk into the cabin, what are your thoughts on this?

Since I am bridging the 300.4, 160x2 (i never run it maxed to where the gains are set, just till where i think its "loud enough") is this too much power for the components, I hear some poeple sending these 150 watts but saying thats "pushin it"

Thanks, and i am a VERY VERY happy PG customer. Been trying to get all my friends to switch to PG RSD line up, for the price simply cannot be beat.

-Vinh

Post by **joerg** » Tue Sep 15, 2009 3:01 am

I assume u are sitting in the drivers seat when u hit the road!?! Rearfill to me is like visiting a concert or a gig or whatever and have my back facing the stage all the time. Sounds pretty

Does it?

Get those speakers out and that´s it! Just my two cent´s.

Thunderdome · Post by **Thunderdome** » Tue Sep 15, 2009 3:43 am

Agreed

Post by **stipud** » Tue Sep 15, 2009 7:18 am

I still think that rear fill has its place in large sedans. If you've got frequent passengers in the back, depending on the placement of your front speakers, a lot of midrange can be blocked by the front seats. For this reason I have midranges only in the rear, faded out heavily (just enough to get a balanced sound level in the back seat). I then disable them when there's nobody back there, to improve the front stage for myself.

dwnrodeo · Post by **dwnrodeo** » Tue Sep 15, 2009 7:49 am

Forget passengers, go without the rear fill.

Usually the people that ride in my car could care less about SQ so I focus on the only person in the vehicle that cares... ME!

Post by **ttocs** » Tue Sep 15, 2009 9:55 am

I personally am a fan of a little bit of rear fill. I do not like it full range or full volume and use the rear-audio-fill function on my diamond audio hex system as it allows a small amount of tweeking and doesn't suck up much power.

exist2serve · Post by **exist2serve** » Tue Sep 15, 2009 11:27 am

My rears (Morel Tempo Coax's) are running off deck power, I like the added bit they add.

bogart · Post by **bogart** » Tue Sep 15, 2009 11:45 am

I typically don't run em....but if I do it is just a mid and if you can isolate anything from em they are too loud or you need to cut some more off the crossover....

depends on taste and the stage you desire....but if you are in a small cab....cut em out or at least yard the tweet out of it and use it as a mid...no lows and no tweet...

boogiem0nst3r · Post by **boogiem0nst3r** » Tue Sep 15, 2009 12:13 pm

So If i were to remove the speakers from the rear, would there be much to gain since the bass from the trunk now has a path to enter the cabin (the holes where the speakers were) can anyone hear/feel difference?

If i were to run the coaxials, off deck power, with ripping out the tweeter, how exactly would I adjust/run this off my deck? My deck is pretty basic doesn't have any cross over controls or anything like that, so the signal to them would be full range? And I dont know if theres anyway where I can fade the rear volume because my amp is 4 channel so its getting front/rear left/right, If i were to fade the rear on my deck it would mess with the amp as well right for the fronts?

-Vinh

Post by **ttocs** » Tue Sep 15, 2009 1:07 pm

you can just use the fader to adjust the amount of sound that you want from the rear speakers........

boogiem0nst3r · Post by **boogiem0nst3r** » Tue Sep 15, 2009 1:12 pm

you're right ttocs...but won't that tamper with my 300.4?

right now im sending 4 channels into that...and bridging the 4 channels into 2. and sending that to the front

if i were to run my rears off deck power...and fade the back...wouldn't that lower the power/output send to the 300.4 as well and thus reduce my fronts?

-Vinh

bogart · Post by **bogart** » Tue Sep 15, 2009 1:12 pm

non polarized caps and the appropiate ceramic resistors will give you the control you seek and you can use the resistors to attenuate the fill to the rest of the system too........

some fourth order systems can give you a bandpass channel to them to optimized the power that they have off the deck....I have been looking at building some real x overs lately and it is just doing the math and getting the parts really.....

bogart · Post by **bogart** » Tue Sep 15, 2009 1:13 pm

well,,,little harder then that but it isn't rocket science or anything....

cyberpunky · Post by **cyberpunky** » Fri Sep 18, 2009 6:02 am

You have bridged your amp so it is now a 2 channel and only sees the signal from inputs 1 and 2(fronts), if you have rear rca leads plugged into ch 3 and 4 it's neither here nor their. The amp is only using signal from inputs 1 and 2.

So you can run rear speakers off HUs internal amp and then use fader to adjust level or turn them off completely, if you want.

If you ditch them, you may get slight increase in output from sub, as it will vent into car better. If you do this I would leave speaker grills on rear deck, as that won't impact sound, but will look neater and prevent ppl being able to see your sub box thru hole.

I don't have rears, but I can't fit ppl in my rear seat anyway. if I had another car, I would run rears, for those times I did have ppl in back, that way they would got more than just bass to listen to. Then I would just fade them out when no one is in back seat.

hope it helps
peace
Cyberpunky