Dissapointed

[GLN305]

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[eloplayspolo]

Sur.... u wana trade ur six 8s and ur amps for my 2 10s and my amp? :)

[GLN305]

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[Music Joe]

I dug up some past posts to get an idea of what your doing with these.
I'll toss out a question and suggestion based on what I've seen. You appear to have six eight inch drivers in a common ?sealed? chamber.
Some short braces [since the cabinets already made] to stiffen the face and rear cabinet wall may help.
Are the drivers all wired in parallel or series parallel to the mono amp?

A quick vario-venting test could be done...just pull one eight out of the chain... tape off the spare leads and screw a piece of scrap over the empty hole with folded batting under it with long screws to adjust how tight it's screwed to the cabinet.

[avguytx]

I looked and didn't see it stated. What kind of vehicle is this in? Not everything is going to sound good in every vehicle even if it is to the manufacturers specs. The vehicle plays the biggest part in what it sounds like.

[GLN305]

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[GLN305]

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[Installer4life]

Port two of them..

[GLN305]

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[avguytx]

There's the first problem...it's a truck! :D I have a quad cab Ram myself but never got too far into it. The main problem with trucks (even quad/extra cabs) is that the distance of the wavelength for lower bass is basically outside of the truck around the hood. Does it sound better outside of the truck? In 20+ years of car audio, that's what's typically happened in vehicles I've built. Hatchback cars, trucks, etc, have the advantage of distance away from your ears especially if they are firing backwards in a vehicle. Think about taking just 2 of those 8" woofers and loading them in the back hatch of any 1982 to 200? Camaro or Firebird. They would hammer in there! Especially 6! (done that before)

[exalted512]

Sure everything is in phase?
-Cody

[exalted512]

Also, you have a subsonic filter on?

Is it a factory radio? If so, do you have bose?
-Cody

[Topper]

Sure everything is in phase?
-Cody

x2 :)

thats a lot of subs so might want to double-check the wiring and see if any might not be wired properly which would significantly cut output as they'd be fighting each other. (sorta sounds like the prob you could be experiencing)

[GLN305]

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[GLN305]

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[MacLeod]

You have to remember that even tho youre using 6 of them, theyre still just 8's. 8's cant hit as low with as much authority as a bigger sub can.

Either way, 6 8's should have plenty of punch in the 50-80 Hz range. Ive been using Momo subs for several years now and output is not something they lack and since its unlikely that all 6 are suffering from some kind of manufacturing defect Id say there is something wrong with the box design or the setup somehow.

And usually a sub in a too small box will actually have a little more impact as it will cause a pretty sizable response hump usually somewhere around 50 Hz. If its sounding too weak and/or flat, thats more a characteristic of too large a box.

The only thing I can suggest is to throw together a .33 ft3 sealed box and stick one sub in there at a time and give a listen. If they all play solid then you know its an issue with the box design somewhere.

[Jstas]

8" subs aren't going to dig deep either. Very rarely do they get past the low 40's and if they do, they sound like crude 'cause the motor structure and cone is so heavy that there is no way they could ever be "musical".

[Music Joe]

I agree each needs it's own section in a sealed box design.

[GLN305]

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[Music Joe]

wow...that's a bass-mid, time to slap a new face on the box. Sorry about the false leads :(

[Jstas]

My plan, like most audiophiles is to cross the sub low, like 50 or 60 Hz meaning that I need performance below that point.

What? Nonsense! My sub is crossed over at about 80 Hz. I wouldn't want to cross it over at 50 or 60 Hz because that puts the full-range speakers too close to their peak performance at the bottom end. Besides, IIRC, sub-bass is defined as sounds between about 18 Hz and 90 Hz. Mid-range is above that and the whole "infrasound" spectrum is below that. It's difficult to get a conventional transducer into the "infrasound" range reliably but I have seen it. Usually though, the transducer ends up reproducing "infrasound" ranges due to a harmonic produced by a resonance of the transducer.

[eloplayspolo]

haha, WOAH!
i bet ur pretty good at scrable.

[Jstas]

haha, WOAH!
i bet ur pretty good at scrable.

No, I suck at that game.

And it's speeled Scrabble.

Now, Trivial Pursuit! I am unbeaten at that game! I've won that game in as little as 15 minutes too! I usually have to deliberately give wrong answers just so everyone else can enjoy the game through the perception of how "close" the game is.

This head of mine is FULL of useless stuff...you might say "trivial" stuff like teh stuff in Trivial Pursuit!

[cam5860]

I had two of the momo 8's in my truck one time. They were in sealed truck boxes at .35 cubic feet and they hit clean and deep. These are some of the best sounding 8's I have heard. In my experiences in box building a box to small will deliver deeper bass response but will sacrifice some output.

[eloplayspolo]

And it's speeled Scrabble.
and it's spelled "SPELLED";)

[GLN305]

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[GLN305]

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[Jstas]

Well, as far as crossover point, I am just going by what Sq competitors do and how they win. My mids are crossed at 50Hz and play very cleanly to that frequency. Honestly I like my subs crossed at 60Hz or so since any higher and they draw attention to themselves most of the time and I don't want to lose the "bass up front effect".

Here's a good thread to read about crossover points:
http://forum.elitecaraudio.com/showthread.php?threadid=145518

You do what you want to do. Just don't give misinformation and pass it off as something every "audiophile" does because it isn't. And thanks for the info but I understand crossover points very well. My full range speakers only go down to about 40-45 Hz and if I put them on a crossover slope of the usual 6 dB, the fall off is too rapid and I don't get enough overlap to cover the full frequency range. So I cross my sub over at 80 Hz and the full-range at 60 Hz and I have no localization problems except from the fact that you can feel the sub kicking right behind the seat.

[GLN305]

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[Jstas]

I wasn't posting misinformantion and since you feel the need to attack me publicly, I just put you on my ignore list. If I offended you just know it wasn't meant to offend.

Heh, that's funny! :rolleyes:

[GLN305]

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[MacLeod]

While its true that SQ competitors usually have their subs crossed over very low like 40'ish, this isnt because its the best sounding option. 99.9% of the time its for imaging.

Most SQ cars have the subs in the rear except for those that are heavily modified and usually anything over 63 Hz starts pulling to the rear quite noticeably and that can kill your imaging scores which make up over 1/3 of your total score.

You also have to realize that the vast majority of the music listened to by SQ judges and tuned for by competitors aint nothing like what youll listen to while driving to work. Classical, jazz and a lot of stuff with stand up bass in it which is EXTREMELY hard to reproduce accurately.

For my SQ setup I have my sub cut off at 40 Hz. For my daily driving its 63 because Id rather have the sub pull to the rear a little more in order to have a little more bass.

Lastly, I think the problem is that youre trying to get 8's to perform like 10's. If youre wanting sub 40 Hz response, an 8 isnt the best thing regardless how many youve got. Youve got to have the right tool for the job. Get a single 10 if youre after big sub 40Hz performance. My single MM2104 plays the 18 Hz note on the IASCA disc and the 25 Hz not on the MECA disc with ease.

[Toxis]

if a driver is balls enough, getting in the mid 20's shouldn't be a problem with the power and box to accomodate. Especially coming from the home audio side of things. In car, it's usually harder but I've heard MANY 8's hit like 10's and 12's before. JL 8W6's of old... Old Solobarics... Image ID8...

[Jstas]

I tried to resist the urge to read this post, but I did. I will withdraw myself from this forum.

So you take issue with one person on a forum and put them on ignore yet still can't resist the urge to look at the post and get further ticked off and take your ball and go home?

Fine, whatever dude. That's your decision. You ain't hurtin' me none. You're not the first person to tell me you don't like me and you aren't the last.

[Topper]

relax fellas :). We all have the same goal in mind which is to solve and/or maximize performance so lets keep our eye on the ball :)

[eloplayspolo]

relax fellas :). We all have the same goal in mind which is to solve and/or maximize performance so lets keep our eye on the ball :)

but didnt u hear? Jstas said that GLN took it with him when he went home..

[MacLeod]

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What a panzy. :rolleyes:

[GLN305]

What a panzy. :rolleyes:

Online name calling is really a brave thing to do. I hope you feel better calling someone you don't know a panzy.

[GLN305]

I'm just going to make sure that my point is clear here. I came here hoping to find like-minded people to share my installation with and talk about car audio. Apparently this isn't the place for that. I am not scared to post nor am I worried about what anyone thinks of me on the internet. Meet me in person, then judge. I have helped anyone and everyone that I can with car audio or anything else in life and honestly if you insulted me here and I know it's you on the side of the road with a flat tire or broken down, I'll still stop to help. I am just a better person than bad-mouthing on the internet.

On a second subject I talked to a Polk Audio representative and they were of no help to me on the subject. I was simply told that "8's just don't reach the low notes." If that's the truth, in my opinion, they should not advertise a frequency responce that reads 26 - 200 Hz, it's simply not true in the enclosure they recommend nor in free field testing, nor on a baffle....the Klippel does not lie. I am lucky enough to be in Germany and know enough of the right people to spend some time with some rather nice test equipment. I do not know how to use it, but the person that did the testing agreed with my findings. I am in no way saying that Polk Audio is junk. I have a set of RT600i home speakers that I love and I look forward to buying the SR6500 set. I just think they gave into the small enclosure marketing trends that are rampant these days.

After this, if you want to bad mouth me or put me down here, feel free, but I won't see it as this is definitely the last moment I am going to spend on this site at all. If you have any reason to confront me, want to discuss anything my e-mail address is GLN305@hotmail.com . My phone number in Germany is 0114916092542166. I will be back in the US by the end of April, so that number will not be any good after that.

[Jstas]

Wow.

Just...wow.

[eloplayspolo]

i just called that number and its a whore house in Amsterdamn..... was that dad that answered?

[Jstas]

Classy!

[cam5860]

Why yall got to be a bunch of jackasses all the time?

[MacLeod]

All this drama because John disagreed with him? Sheesh. Im still trying to figure out where the personal attack was.


i just called that number and its a whore house in Amsterdamn..... was that mom mom that answered?

That is a little low dude. No need to dis' the guys mom.

[eloplayspolo]

fixed

[1996blackmax]

man....thins thing went south quickly....


eloplayspolo, that remark you made even though edited is still a low shot. One thing is to throw shots at someone, quite another when you get their family involved.

[Lasareath]

I like you GLN305!!!

Your a good guy in my book!

8 inch ers maybe go down to 45hz, I'd use 8 inchers for 65 to 120, 10's for 65 and down, and 12's 45 and down

Sal