01 sentra

hellohello

uh, yes.... I have multiple personality problems... well, its not really a problem for me, just everyone else

audiobliss

ROFL

Ok, I got it now, then.

So, how's this project coming along? Did you ever figure out what to do with that bar under your trunk lid?

hellohello

nah, im not lookin to destroy the car. i took those speakers out of the back entirely and just ran a set of db650s to the fronts, took a while to get used to, but its all good now, except for the rattles and buzz from the door panel, but i dont really drive long enough to care... i might be getting another car, an older one i can play with, as in beat up and on or go nuts and install a great sound system, or make it run on water... I gotta stop talkin about that, might get OPEC even more pissed.. like a chevy celebrity or some old mans car that isnt collectible, this one is still relatively new. i dont know tho with the gas prices being what they is... i might end up getting a 3 speed bike or electric moped. clearly "coolness" is not a factor for me.

hellohello

well, still no amp, but that may change. Im looking at a 2 channel thats "tri-way capable" which i looked up on crutchfield to be:
Tri-Way Output
Sometimes called Dual Mode, this setup powers a pair of stereo speakers and one subwoofer simultaneously from the outputs of a single 2-channel amplifier. It's an affordable way to drive a subwoofer. It requires an external Tri-Way adapter that is connected in-line between your amplifier and your speakers.

Im not sure how that would work. would that be bridging the two outputs and then running everything mono, And since the db's already have crossovers id just have to get one for the sub? Im not saying im going to use it for subwoofering, but im just curious as to how that feature works.
this is the "adaptor" they link to:
http://www.crutchfield.com/S-2YGS3AHnrUZ/cgi-bin/ProdView.asp?i=127TM100&id=morephotos&a=&s=0&cc=01&g=82600#morephotos

CrBoy

I think some of the Crossfire amps are tri-way-capable... something like the VR402... Download the amps' PDF Manual (Crossfy website) for an example of a tri way setup...

MacLeod

Tri-way is running the left and right speakers off the left and right channels and then bridging the left and right channels and running the sub off of them. Not all amps can operate this way.

CrBoy

I know crossfire amps can do it for sure... don't know about other brands

hellohello

so i would still be using the left and right channels, AND a sub bridged.. that just sounds dangerous

audiobliss

Are we talking about 4-channel or 2-channel amp here?

hellohello

two channel tri-way operation, Mr. Bliss

CrBoy

Check this out...

audiobliss

Wow. Three-way off a stereo amp. Never heard of that before. Impressive, if it'll work.

hellohello

indeed. But i wonder if the amp would heat up with all that load...

audiobliss

I'm sure it would. But if it's designed for it, it probably wouldn't heat up excessively.

MacLeod

Why wouldnt it work? There are quite a few amps out there thatll handle a 1 ohm load and this wouldnt even be that low.

hellohello

i guess its just the seemingly illogical idea of 3 speakers on two channels, it just sounds like a bad idea lol, not that it is, but it wouldnt be something i would have thought of.
but if it has 3 speakers all at 4 ohms, would that be in effect splitting the RMS wattage (at 4 ohms) by 3?

hellohello

since its so quiet lately, i figure ill post a random question. Now ive seen a lot of different sound deadening materials, be they mats or liquid, and as far as i know the "pro made ones" are simply butyl rubber, esp dynamat. So I ask, would the rubber roofing u get in a 5 gallon can at Lowes have a similar effect. It is rubber, is meant to be exposed to the elements, and iirc, costs $30 per 5 gallon drum. If one allowed enough time for any potential fumes from the liquid agent to dissipate, i think it may work.

neomagus00

yep, it's been done... for only $30, it's worth a shot...

MacLeod

Its all the same principle, it works by adding mass to the door or whatever which makes it more rigid and less likely to vibrate/resonate.

hellohello

i see... i realize that adding mass is the goal, just wondering what other ways there are to put skin on the rabbit, so to speak

neomagus00

the (intended) advantage of the expensive stuff is to save weight - that 5 gallon bucket's going to weigh a ton...

MacLeod

Right, the benefit is the more expensive stuff will be more dense so youll get more damping out of the same size material.

Im sold on damping as much of you car as possible. Ive been doing mine for like 2 years now! LOL

Whenever I get some loose change in my pockets Ill run down to Tweeter and pick up one of Dynamats speaker kits and cut pieces out and apply them where Im hearing vibrations on my door panels. Im noticing more and more imporvement in my overall SQ with the added damping.

This isnt very logical cause its going to wind up costing me about $500 once Im done when I couldve acheived the same goal if I just went out and bought a big **** $80 sheet and did both doors at once.

1996blackmax

I need to do some more dampening to my vehicle. Years ago I thought I was there, and I pretty much was, then the car just got older. As this age thing happened more little squeaks and rattles were born . Also adding my aftermarket suspensions stuff did not help either (struts, springs, swaybar), the car's ride quickly got stiffer. I still have a couple of sheets of Dynamat my friend gave me. I will put those on the rear doors, and where ever else I hear things. My front doors have solid sheets of Dynamat Extreme, and that helped out quite a bit. I also did something pretty el cheapo a few years ago, but it worked. My A-pillars would sometimes squeak, so I just stuck pieces of rags in there . No more squeaks from there .


Now I need to find that tape stuff that has some felt type material on the other side. This is the stuff that my car has on some of the panels to help stop the squeaks. I am going to line the back of many of my panels with this. I will attack this noise issue one more time with this car as I do not feel like taking everything apart after this next time.

MacLeod

Dampening your car is easy. Just open your doors and spray the inside down real good with the water hose.

Damping your car is a little harder tho.

Yes, Im a typ-o ****!!

1996blackmax

I am "ussually" pretty good with that, unless I am in a hurry. Tonight though it is a 2 day old headache. Maybe someday a scan will be in order .

hellohello

oh, ****... <pulls hose out of door panel>

hellohello

the stuff in my interior door panels looks like carpet padding.. only thinner. I used to have this gasket tape stuff that was almost 1/2" thick, id like to use that on the perimeter of the door panel where it mounts, but it would most likely not compress well and turn my door panel into a projectile

hellohello

here we go again, im anticipating the arrival of some mm6500s, and "perhaps" a set of 8s
So im going to replace the db650s in the front doors, probably sell 'em, and put the 8s in the trunk leaving the rears out, or maybe ill put some rears in, i dunno, but i think with the 8's being the size they are it would be better to have them firing into the cabin... Now im really gonna need a freakin amp... im leanin toward a profile 4 channel, its cheap and people here seem to like it, most likely run the momos on the two fronts and then the subs bridged on the rear. ****, i need damping too.. and money... definitely money

hellohello

how about this idea, I get an 8" speaker, capable of 32-7000hz, put it in a box in the trunk, and use it for a mono midbass, midrange and to hell with the db675s...

neomagus00

hehehe... good luck!