kicks sounding hollow

[jellyfish420 0]

someone told me to drill ~1" hole in the back of my kick to "vent" it into the floor...would it be better to do this or to actually port in to a certain freq? and if ported is better, what should i tune it to?

[mrray13 30]

hollow? like boomy? i'd suggest slugging it first, lower the volume a bit and see if that helps...

if not, and u want to go ported, then port it (i guess..lol..85hz??) but port it, i wouldn't just "drill a 1" hole"...that'll defeat the purpose of having ur mids enclosed..i would think..

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[jellyfish420 0]

hollow? like boomy? i'd suggest slugging it first, lower the volume a bit and see if that helps...

if not, and u want to go ported, then port it (i guess..lol..85hz??) but port it, i wouldn't just "drill a 1" hole"...that'll defeat the purpose of having ur mids enclosed..i would think..

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

<{POST_SNAPBACK}>

thats what i though. i wasn't about to ruin the kicks i spent so long on by drilling a d@mn hole in it! LOL

but hollow as in around 100-200Hz, it sounds like all these notes are being played in a bathroom or something. its kinda like.....

BOOM(echo,echo) see what i'm saying

i was thinking maybe stuffing it full of some polyfill, might tone down the echo some....would you agree or disagree.

[mrray13 30]

hollow? like boomy? i'd suggest slugging it first, lower the volume a bit and see if that helps...

if not, and u want to go ported, then port it (i guess..lol..85hz??) but port it, i wouldn't just "drill a 1" hole"...that'll defeat the purpose of having ur mids enclosed..i would think..

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

thats what i though. i wasn't about to ruin the kicks i spent so long on by drilling a d@mn hole in it! LOL

but hollow as in around 100-200Hz, it sounds like all these notes are being played in a bathroom or something. its kinda like.....

BOOM(echo,echo) see what i'm saying

i was thinking maybe stuffing it full of some polyfill, might tone down the echo some....would you agree or disagree.

well, poly is going to make it boomier to a degree..until a point a which u have so much poly it actually decreases volume...

i'd try a slug or too first, lower the volume..

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[Chevy350TPI 12]

someone told me to drill ~1" hole in the back of my kick to "vent" it into the floor...would it be better to do this or to actually port in to a certain freq? and if ported is better, what should i tune it to?

I played around with the internal volume and finally resorted to drilling a hole in the back, 'venting' it into the floor.

Trial and error - see what you like.

[mrray13 30]

someone told me to drill ~1" hole in the back of my kick to "vent" it into the floor...would it be better to do this or to actually port in to a certain freq? and if ported is better, what should i tune it to?

I played around with the internal volume and finally resorted to drilling a hole in the back, 'venting' it into the floor.

Trial and error - see what you like.

and this works? i mean doesn't it defeat the purpose of sealing them in the first place?

comeon steve, spill ur knowledge..

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[Fonzi 3]

The only time I've seen ported kicks was in a kicker SQ car. The kicks were ported with a toilet paper roll he said. Said he could change the tuning by adding or removing some of the length of the roll. Makes sense.

[ANeonRider 3]

aperiodic enclosure

Actually been known to improve midbass response. Trying to find the article I read once about it.

Also...

Remember in the previous articles that enclosure resonation and standing waves destroy good sound quality. You should keep this in mind during construction. Make the baffles as solid as possible, make the enclosure walls thick enough to avoid flexing, and make sure the kicks can be very securely mounted to the car. Damping the kicks during installation is a very good idea (as discussed previously), and the use of DeFlex pads or polyfill will help control the standing waves and reflections inside the kicks. Even a form of absorptive damping material can help dramatically.

[ANeonRider 3]

Found it:

We have already gotten a handle on #1, will address #2 more vividly in the Tuning section but proper fabrication already has us on-track, and here is what I do for #3. Since my kicks use a floor mold, which is made to rest right on top of the vehicle

[jellyfish420 0]

Found it:

We have already gotten a handle on #1, will address #2 more vividly in the Tuning section but proper fabrication already has us on-track, and here is what I do for #3. Since my kicks use a floor mold, which is made to rest right on top of the vehicle

[mrray13 30]

neon, thanks for the link...

what if a person has rubber floors? (my bro-in-laws silverado has a rubber floor mat thru out the truck, no carpet)

anyway...thanks for pointing jelly in the right direction..i stand corrected....

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[Tirefryr 1,742]

I personally feel it's a resonance isssue. I'd go to a habby store and get some modeling clay first and start packing that baby till it sounds better.

[Chevy350TPI 12]

I personally feel it's a resonance isssue.  I'd go to a habby store and get some modeling clay first and start packing that baby till it sounds better.

And if this doesn't work / work as well as you wanted it to, what would you suggest as a next step?

[jellyfish420 0]

I personally feel it's a resonance isssue.

[ANeonRider 3]

Resonance doesn't always mean flexing. Your kicks are probably a tad big, and the resonant frequency is high. Dampening material would help more than the hole I think.

[Tirefryr 1,742]

Resonance doesn't always mean flexing. Your kicks are probably a tad big, and the resonant frequency is high. Dampening material would help more than the hole I think.

Well put, and agreed. Simple vibration from electrical current can cause resonance. I have had several times where I actually had to add mass to the frame of the driver as the basket was resonating. I now practice this on all smaller drivers just as a precautionary measure.

[jellyfish420 0]

Resonance doesn't always mean flexing. Your kicks are probably a tad big, and the resonant frequency is high. Dampening material would help more than the hole I think.

<{POST_SNAPBACK}>

Well put, and agreed. Simple vibration from electrical current can cause resonance. I have had several times where I actually had to add mass to the frame of the driver as the basket was resonating. I now practice this on all smaller drivers just as a precautionary measure.

<{POST_SNAPBACK}>

how big should kicks be???what kind of dampening material? what do you add mass to the frame w/?

i do have another question off the subject...how do you adjust your eq? i got the 13 band on the h/u and i find myself constently adjusting it. sometimes it sounds good sometimes it don't...but i can never find that perfect spot where everything just sounds perfect. the BBE feature on the h/u...on or off? sometimes it makes stuff sound better, sometimes the highs just drown everything out.

[Supa_c 1]

I put the BBE on

You should be able to adjust it on a number rating

No 2 songs will sound the same

some will be harsh some wont

[Tirefryr 1,742]

Well, it's kinda hard to answer your questions really. When I build kicks, I generally build the enlosure to suit either:

A. the flattest response

B. the best response throughout the specified frequency range.

If you don't need a driver to produce XX.xxx frequency, why make an enclosure that will. Now this is easier said than done, and most likely just complicates things even more, so I suggest a simple modeling program like winISD or BassBox to get a general idea. Or simply calling the manufacturer.

As for tuning the best way IMO is to use your ear. That's going to be the judge in the end I myself try to start out flat, so if I have access to an RTA and a mic, I will take advantage of it. Then I'll adjust from there. Everyone's taste will vary though. ME, I can easily do without a subwoofer and actually rarely use one nowadays. I like a very STRONG,almost overbearing midbass. Take it how you will, but the best way to do it is to just keep playing until you're happy

[Tirefryr 1,742]

Almost forgot, I usually am very partial to the modeling clay for everything as it will conform to ANY shape, sticks in place and will add quite a bit of mass. And it's CHEAP.

[mrray13 30]

funny..i suggested he lower the internal volume in the very first reply..noone agreed with me. of course i didn't use $3 words to describe what i was talking about.....

i guess noone reads my posts anymore...

bastages....

wheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[Supa_c 1]

How does one go about adding this clay ?

[jellyfish420 0]

How does one go about adding this clay ?

<{POST_SNAPBACK}>

i believe you just press it against the wall. its kinda like silly putty...

[Supa_c 1]

wall ?

[Tirefryr 1,742]

Kent, noone disagreed with you either. MAtter of fact, the clay thing just happens to take up some space as a side effect. Hell, I don't even know if it is resonance, it was just a guess as I've had this exact same problem a couple times already myself.

As for applying the clay, you are correct. Don't be afraid to try some on the frame of the dirver as well.