BKOLFO4

Get a PAC inline RCA subwoofer level controller and put it on the RCA's coming directly out of the headunit. That is what I do and it works great.

You did such an incredible job of routing all that wiring, that it is really sad covering it up. . . Looks awesome man!!!!

What is this going in? Which way do you want the sub and port to face? Just curious, since your port width does not follow any of your exterior dimensions. With 3/4" wood, you have 14,5 x 11.5 x 17.5 = 1.69 ft^3 gross airspace. By the time you subtract driver and port displacement, you will not net 1.2 ft^3, unless you get the tuning frequency up. I would build to your max dimensions. Assuming the port and sub are on the 16 x 13 side of the box, make the port 11.5 x 1.5. Run it into the box so it is 1.5" from the back wall, and then run it along the back wall until it is 1.5" from the opposite side wall. Comes out to around 1.13 ft^3 tuned near 34 Hz. Should work pretty good. Brian

Or order dual 2's - wire each sub's set of coils in series, and then parallel all three subs. 1.34 ohm load

Spiders stiff enough for ya?? Man they took a lot of beating on to break in. . . Brian

If installed correctly, three should be louder. If you are going to compete at all, it would be worth it. If it was mine, and the only decision was two or three subs, I would go for three. . . If you have the electrical system (sounds like you do), I would do two 18's and use the money saved on the third sub for more power. A pair of BTL's will handle a pair of 40.1's if you know what you are doing. . .Or pick up a pair of Sundown 3000D's.

Actually, two would not be overpowered unless you are just really careless. . . . Brian

Wish that was my safari. . . If it is for SQ more than dB, why not just a pair of Q 15's sealed. Plenty of output and would sound great.

Call AA. Until there are more dealers, I think they are allowing dealers near you to sell and ship to you.

My system is my daily driver, and my 40.1's are at .5 ohms (.35 DCR). Man I pound the crap out of my system every day and not a single problem. Sometimes I will run it for 20-30 minutes at a time at full volume. If it was me, assuming you have room to build the correct box, I would add the extra 18 and run three. It is still 33% more cone area, and if you run dual 1 ohm drivers, series the coils on each driver, and then parallel the three drivers you would have a nice load for the 40.1 to get maximum output from it. 40.1's are getting harder to find. If I can't find (4) more next month, mine will be for sale to find something else. Brian

www.ficaraudio.com Select your options, add to your basket. Shipping is included in the price shown.

Looks like it is going to be an awesome setup. Duplicolor works great for me. A lot better than that plast-o-crap walmart sells now. Spray the duplicolor from about 6" away to get good coverage. Then, back up about 18" and hit it with a second coat for a good texture. . . Brian

From the time he starts until the time he finishes will much more than 27 seconds. I would guess more like an hour. . . unpack, take apart, replace diode, repack, address, etc. If the man is going to make a living repairing amps, that is pretty darn cheap. . .

US Amps will repair it. . .

Of course you can. . .20" deep takes into account the bend making the port 25.5". I find when the port ends without a piece actually extended the port along the back wall, you don't get the full effective length of the corner, you get about half making the effective of the port in this case about 22-23" inches. Brian

17" is close enough to 16.75". . . And it can't be 22.5" long on a box that is 25.5" deep. Assuming 3/4" wood, you only have a 2.25" opening left at the back on a 4.5" port.

17" long should work pretty good. 38 Hz is pretty high for daily. If you are going for SPL, you can start with a port length of 20", sweep and measure SPL, cut 1" off the port, sweep and measure SPL, cut 1" off the port. . .repeat until the port is around 10" long. You can also measure the true tuning frequency of each port length just for reference to see how it compares to your peak output frequency. If this is for daily, I would make the port wall 20" long for a tuning around 34 Hz. Brian

sure. . . PM me what you are looking for.

Should not be a problem if the gains are set correctly. . .I only run 2 volt out.

I doubted it would, but now you can feel better about having "too much" port area. . .

If it is 9 ft^3 net, then 12*9=108 in^2 If you use 16 inches per cuft, you need 144 in^2. 157 is not far off as long as it is tuned correctly. I have used 300 inches with 11 ft^3 when I had my pair of 18's. The impedance rise will definitely vary between setups. You should measure what you have now to get an idea of where you might be. Every sub I have run in my box measures an actual impedance that is pretty much 2X my DCR. Brian

So the port is 20.5" high. . . You are tuned a little higher than 31 Hz. Also, the sub has to loosen up a little. About 1 hour of hard playing and it should sound different. You could add a piece of wood to the port to make it 4.25 inches wide and see if you like how it sounds. Add it to the inside port wall and run it into the box so it is 5" from the back wall. Also - What is your crossover set at? Not going to hit higher notes if the crossover is set too low. Brian

Does the box sound good when you are not a full volume? Clipping will occur when you are going beyond the amplifier's limits. . . Does not matter what your battery voltage is, you can still clip. Can you post up the box dimensions, including the port dimensions? Brian

Box is a little bigger than I would have made it. Most 18's I have used sound good in 6-7 ft net. For your box, I come up with a tuning around 36 Hz if the port is 20.5 x 5 x 15.5. . .maybe it is not 20.5 high? If the dust cap is getting hot on 1000 watts, you are clipping pretty hard which is another reason it sounds bad. The dust cap getting hot is not related to the box size. That is a thermal issue. Brian

Those amps love low ohm loads. With impedance rise, you would have been better off with dual 1 ohm coils. It was a very noticable difference when I went from dual 2 ohm to dual 1 ohm coils runnning my amps at 0.5. You are not far off with your port area, so it should not be a problem unless you are not tuned where you think you are. If you make a port plug, it might or might not make it sound louder. the change in tuning frequency would make the difference more than the amount of port area. You could strap the amps on all 4 coils in parallel just to see how loud it is. That is a 1/4 ohm, but with impedance rise, those 20.1's should handle it just fine for long enough to see if you just want more power to get the output you are looking for.