if i have a type one box can i add a port tube to make it a type 2 box.?

Question

just by drilling a hole and putting the port tube in it?

Answer 1

It's not quite that easy. You need to look at the specs on your subwoofer(s). Chances are, they need a larger enclosure if you want to utilize them ported, and simply drilling a hole in a type 1 box is not going to work. If by chance your subwoofer(s) WILL work in such a small, ported enclosure, you can do it, but you need to check the specs of the subwoofer(s) to determine what size and length of port you need for the airspace you have.

Simply drilling a hole and sticking a port in it will ruin not only your subwoofer enclosure but will adversely affect the performance of your subwoofer(s).

Answer 2

NO!!!!!

http://spkrbox1.spaces.msn.com/...... for real "sound" advice.

Your system won't mean squat without a well designed box to put your subs in. Some manufacturers have recommendations as to dimensions of various types of boxes. It is best to find someone who builds boxes if you go with something other than a sealed box.

You should always match up RMS (Root Mean Square) watts of Subs and amp per channel as well as impedance's(resistances).

If your amp is rated at 4Ω don't subject it to 2Ω, it will fry.

Here is the formula for subs in parallel:

Z = 1 / (1/sub1 + 1/sub2 + 1/sub3 + ....)

For series, just add them up (sub1 + sub2 + ...).

You can mix and match these equations to get the right impedance required by your amp.

Example: 4 subs @ 4Ω each. If I connect two in parallel and the other two in parallel and tie the two pairs in series, I would have a total impedance(resistance) of 4Ω. So to the amp, it's just one sub.

You should use a capacitor as well.

Recommend for every 500 watts MAX you use a .5 Farad cap
Example: 1000 watts MAX - 1 Farad cap

Try http://www.soundomain.com/shop you can find some really good deals, and this site is manufacturer certified. VERY IMPORTANT WHEN SHOPPING ON-LINE!!!

You will also need what's called a "line level converter" if your stock head unit doesn't have RCA outputs or your amp doesn't have high-level inputs.

If you like I can send you some plans for reference. My plans are for a 4-th order band pass bass box that holds two 12's. Also included are java calculators you can use to figure parallel and series values given Ω values.
Just e-mail me [e-mail]

My system

Blaupunkt TSw1200 subs with a Sony Xplōd XM2200GTX.
My amp is 1200 watts, subs are 600 watts each, cap is 1.2 Farad

SPL is about 112 db

Total cost(so far) = $410

Answer 3

yes if the air space is correct for your speakers. Hope I have been helpful

Answer 4

if its not the right cu ft it will sound like s***