nismopc

iTrader: (3)

This is a vented box set up for a Kicker C10 Comp. There is 1.25 cf in the main box and the port is 0.19 cf. Purchased 2 2'x4' 3/4" MDF @ Home Depot for $14 and had them kindly assist me with cutting the 6 sides (for FREE). I cut the port, terminal opening and sub opening at home.

This box is 20" wide and only 10.75" deep. It will bolt directly in between the lower frame behind the rear seat pass through which is almost exactly 20" wide using the existing bolts and some "L" brackets.

Started on this last night. Here are pics..

nismopc

iTrader: (3)

nismopc

iTrader: (3)

nismopc

iTrader: (3)

Hope to get it carpeted tomorrow so I can install it and hook up the amp.

slickrick

iTrader: (12)

looks very good thus far...

djfrestyl

iTrader: (89)

I like your port

Looks good man, great craftsmanship

DcMaN

iTrader: (13)

i would give it a quick test hook up to confirm you ported the box correctly otherwise youll be very upset if u hook everything up nice and neat and then have to take it all out.

mendon99

iTrader: (15)

did you paint it? if you're planning on carpeting why did you bother paint it?

looks good. i will be making a ported box for my 12 in the future as well.

nismopc

iTrader: (3)

I built this box based off of Kickers own Comp Tech Manual. The port is exactly 14.5" long, 10.5" wide, and 1.5" high (internal measures). If this isn't ported correctly, I'd be pretty pissed off. I even took into consideration the 90 degree angle I put into it using the Tech Manual calculations.

I'll report how it sounds hopefully today.

nismopc

iTrader: (3)

2 reasons

1. I wanted too.
2. When I carpet it, if I screw it up at the seams, atleast it won't be as noticeable.

djfrestyl

iTrader: (89)

Sharpie Marker

AscendantMax

iTrader: (7)

can't really tell in the pics, but did you use wood glue at the joints? or is it only held together by screws?

nismos14

iTrader: (56)

Look good why does that mdf look so much thicker than 3/4"

Conrad283

iTrader: (2)

Looks pretty sound and sturdy.

nismopc

iTrader: (3)

I used heavy duty Liquid Nails at all joints and I used all-purpose clear polyseal caulk for all corners to seal it off. The before paint pics was before the port was actually mounted and only had the Liquid Nails and a few screws on the ends.

Pre-painting, I added several more screws to secure it and added the caulk. The caulk is the shiny clear stuff you can see in some of the internal pictures adn the Liquid Nails is the beige colored stuff.

nismopc

iTrader: (3)

Might be cause the box is small. 20" x 10.75" x 16"

If it was a much bigger box, visually I would think the wood would look thinner.

2 Da Max

iTrader: (2)

thats a nice box

nismopc

iTrader: (3)

Well, the box is finished. I test fit it in the trunk and...

...It doesnt fit!! WTF? I was off by less than 1/4". So I pulled out the dremel and cut and grinded about 1/8" off of the frame. I then touced it up w/some paint to protect it.

And here is the finished box.

slickrick

iTrader: (12)

how does it sound?

nismopc

iTrader: (3)

I've got a 160 watt RMS Alpine 3548 (old school) running in mono @ 4 ohms right now and it sounds good. Low end bass is quite low.

I need to figure out how/where to build an amp board so I can install a Alpine V12 mono @ 200 watt RMS and a Alpine V12 4 channel amp. Until then, the F/R spkrs are running off the head unit.

The Infinity 6002i 6.5s arrived today, so I need to install those in the rear and I'll be done.

nismopc

iTrader: (3)

Only thing I can't figure out is Kicker recommends putting polyfil in 50% of the box only. I put about 1 lb of polyfil in the box and it barely fit. Took me quite some time maneuvering the polyfil around to create a large enough cavity to keep the vents open on the sub.

Polyfil is a hard material to measure and I hope I did it right. I might actually consider taking some out.

DcMaN

iTrader: (13)

forget polyfill use this stuff called cascade its like polyfill. It basically seals up any possible air leaks and becomes a cement wall + Sound deadner.

slickrick

iTrader: (12)

polyfill is not used for that purpose...in a ported box IMO I would not use polyfill. it really only helps in sealed boxes to lower the box QTC.

2 Da Max

iTrader: (2)

aww.. Rich knows his shiet!! aww yea son

HitManSE

iTrader: (1)

From now on before you (or any1) builds a box, make a cardboard version with identical external dimensions to see if its going to fit. The fun ive had at many peoples expense for that reason. Atleast you wernt off by much.
I remember when a friend of mine spent a week making a box only to find out he couldnt get it into the trunk. It would fit in the trunk...if he ever got it in there

Anyway the box does look pretty good, what freq is the box tuned to?

nismopc

iTrader: (3)

It fit fine before the carpet. I did not take into consideration the slight thickness the carpet would add.

Kicker states Fb = 42Hz...

...I've got the LPF set at 75Hz on the HU out.

Kicker tech manual also states to use a 25 HZ subsonic filter set at 24db/Octave. I have no idea what this is. I am using the sub out on the head unit. Does it auomatically filter out these unwanted lows???

nismopc

iTrader: (3)

...or do I have to install a high-pass filter somehow that is set for 25Hz. Suggestions???

nismos14

iTrader: (56)

Yea you def better use a ssf. Alpine mono amps usually have this feature.

nismos14

iTrader: (56)

I think the problem here is that you don't know yoru shiet. Polyfill in a ported box is a very odd idea.

nismopc

iTrader: (3)

I think I know enough to be dangerous.

This box was completely built off of Kicker's own tech spec's. for this speaker, so...

I have three Alpine amps in my possession and none of them have a subsonic filter. I stated I was running in mono, not a mono amp. It is not a mono only amp.

slickrick

iTrader: (12)

hmm....if the tuning frequency is 42 you NEED a SSF ASAP. however, DL some test tones and see what your box is actually tuned to. start at like 35hz and go up to 45hz. when the sub is barely moving but is still loud you can get an idea of what the tuning of the box is. If this box is made to kicker specs and its for a 10", the 42hz could be right.

nismopc

iTrader: (3)

What type would you recommend? I was looking at FMOD 20Hz or 30Hz inline RCA high pass filters, but they are online. Would take a couple days to get.

I'll hit some local install shops to see what they have.

HitManSE

iTrader: (1)

It all depends on how low your sub can play before it surpasses its xmax to the point were it will physically damage the sub. With a 42hz tuning freq id guess that would be somwere between 30-35hz. Doesnt the amp have an SSF on it?

slickrick

iTrader: (12)

no lower than 30 IMO...

nismopc

iTrader: (3)

No. There was no such thing in car audio 15 yrs ago as far as I recall. This is an Alpine 3548 2Ch amp that I bought new about 15 years ago. I also have some V12 amps that were made before this whole subsonic filter idea came to the car audio scene.

I am not in the market to buy a new amp to just get a built-in SSF, so my next option is to add one.

nismopc

iTrader: (3)

For maximum RMS ratings, Kicker recommends a 25Hz SSF.

slickrick

iTrader: (12)

with that little power you could get away with a 25hz filter...parts express sells them for like $30. However, seems like alot for a filter when you can get a new or refurb amp with more power and a SSF for around 120ish.

nismopc

iTrader: (3)

PartsExpress. They are about 2 hrs away from me. That's actually where I was looking at online.

Well, here's the deal. The Alpine I am using is rated at 160 RMS, the other Alpine V12 is rated at 200 RMS. The Kicker is rated at 150 RMS, so I really have no need for more power. I already have enough. One of the reasons I bought the C10 Comp was because of this.

I'll look into the FMOD inline RCA's. Thanks for your suggestions.

slickrick

iTrader: (12)

didnt realize the RMS was that low...the FMOD's should be just fine.

nismopc

iTrader: (3)

Yup, the Comp VR's are 300 RMS.

So I found a PAC ANC-25H 25Hz Active SSF and I am looking at the FMOD passive RCA. Both are 12db/octave. Kicker tested with a 25 Hz, 24db/octave SSF. Will I notice a huge difference if I use a 12db?

If it matters, then it's a waste of money for me. I have to buy 2 FMODS per channel and a two 3db attenuators to stack the FMODs and get them to 24db/octave. At that point, a new amp would probably be less expensive.