RAM_Designs

I wish I could have grabbed more just to have them. I really wanted five in case I wanted to do a sealed wall in my truck. Have you done any modeling to see what they look like in other enclosures yet? I know they always recommended them only for sealed, but a couple of us tried some stuff on WinISD and some ported and 4th-order bandpass look promising... 3-4ft^3 sealed appears to be the way to go. It also models pretty well in larger low tuned boxes since Qts and Fs is fairly low along with Vas being pretty high, but I want to use all three so I'll probably just stick to sealed at the moment.

Just decided to throw up a little vid of the 18W6 going to work...not bad for $100, eh? Power is being provided by a bridged Alpine MRV-1507(look up the guts on this thing, it's sweet). 15hz tone first, then 20hz tone...followed by the epic "Bass, I Love You" and another one called "Bassotronics with Bass Mekanik" that can be found on the realmofexcursion.com downloads section. Thanks to Bassotronics for providing great bass music, as always!

I wish I could have grabbed more just to have them. I really wanted five in case I wanted to do a sealed wall in my truck.

Yep, bored on a day off from work and just wanted to post a little woofer porn.

I'm happy that I hopped on it when I did, before the price goes up once they come back in stock.

Credence Speakers, who was the OEM company for JL and many other back in the day, had a sale on some newly reconed woofers using original soft parts. They had them for $100 each, and they sold out quick. They supposedly came back on their website today, at $200, but was then pulled off a few hours later. Trying to find one NIB is probably going to be impossible.

I think that was just JL being conservative back in the day...it seems like they like 3-4ft^3 much better, if you're looking for good low-end extension.

I'm hoping some time this weekend since work is a little slow. I got three.

Monster bandpass box housing six 18" woofers for forum member Violence. The main goal here is lots of low end output under 50hz. This will be fitting in the bed of a 1991 Chevy S10. Volume: 2.25ft^3 sealed per sub, 5.5ft^3 ported per sub Tuning: 42hz Dimensions: 48" wide x 32" tall x 84" deep

Dual 12" DC Audio Level 12's in 4.2ft^3 tuned to 30hz with a flush-mount and rounded port opening. Overall dimensions are 37" wide x 15" tall x 24" deep, and is made to fit in a '06 BMW 325xi.

Power will be via a pair of DC 5k's.

As you can imagine, it's a pretty tight fit in there.

This is a dual 10" bandpass box for a pair of RF T1 woofers. Each sub is in .75ft^3 sealed, firing into 1ft^3 tuned to 46hz. Dimensions are 34" wide x 17" tall x 17" deep.

Dang, that's a lot of weight in the back of that car.

I agree with the 4ft^3 at 30hz, maybe even 4.25ft^3 since you're not running a whole lot of power to them. The larger box will up the overall efficiency and improve low-end output as well. The ported box will dominate a sealed box above 25hz, which is really as low as you'd need your subs to play 99% of the time.

That would considerably raise the tuning going from 4ft^3 to 2.5ft^3 and not adjusting the port any.

This is a dual 15" enclosure for Austin Witham and his AudioQue HDC4 subs. As you can tell, the box will feature a flush-mount design along with a healthy sized kerfed port opening. Volume: 8ft^3 Tuning: 34hz Dimensions: 40" wide x 21.5" tall x 26" deep

This is a transmission line enclosure for a RF T0 10" subwoofer. The line is tuned to 40hz, and poly-fill will be added to drop the tuning and tame resonances if needed. Dimensions: 32"x12"x12" Tuning: 40hz

Ok I'll play along. I wasn't referring to your comment in here as "bringing me down," but I have seen you just come in a thread and say "that's going to sound like crap," and just leave it at that until you get hassled enough about it that you finally explain yourself. I think it is a t-line because it is a generally non loaded "chamber" feeding into a section of the box that maintains the same cross sectional area and has a given length for a given tuning. I know this is not the usual layout with all of the turns and such, and there are other ways to do the line itself to manipulate phase and response, but I have done a few boxes like this myself, and I feel like they work great. The few that I have done for others seem to garner a good deal of happiness as well. Whatever this style of box is technically called, it works, in my opinion.

So, instead of being the all-knowing forum chode that goes around trying to bring people down without providing any sort of help and/or explanation, why don't you shed some light on the subject and try to actually be an informative and helpful person instead of the pompous asshat that you have been playing for who knows how long?

You've done this before. It's tiring. The sub is going to be minimally loaded with the 45 feeding directly into the line. I've done this before; it works well.

The main benefit is being able to dig low on limited power. Overall output is generally on par or slightly less than an optimal ported enclosure while using the same power, but the t-line can't handle as much power. Most of the time I do not recommend running a t-line if you are going to run at least rated power to the sub, as you can get more output out of a ported box that will allow you to fully use the power that you have available. I have found them to be good as a low-power application sort of thing, since the box is designed to not load the woofer, allowing the sub to excurt more at a given power level vs a ported box. And they really don't have to be that big. If you don't mind sacrificing a little output, you can do a diminishing taper to make the line shorter and take up a little less space than a straight line like the one I have pictured. Thanks. If you had any idea how many hundreds of hours I have spent in SketchUp, you'd understand why it's so easy to do things quickly.

Three 10's would be a suitable replacement.

Clean looking cuts, good job.