25Hz Tapped Horn

[Scrappydue]

Yeah mine have been layed out in my theater on my floor since I got them. Now that I have a job time is limited for stuff like this. But on the other hand it sure is nice to have a paycheck. Not getting one for a year has been boring as can be lol

[BLSamuel]

Carl,

Awesome work as usual. Looks like a very reasonable sub project capable of great bass at a reasonable price.

[CECAA850]

Thanks Ben. it's a perfect project for someone who likes to build things but isn't crazy about measuring and cutting panels.

[Scrappydue]

So either I didn't put this thing together right or it is extremely underwhelming to me. It seems so easy to find the woofers limits. Like EXTREMELY easy. Worries me that even the second one will not make a difference.

[CECAA850]

Have you put a meter to it? They're hard to put together wrong.

[Scrappydue]

Put a meter? Elaborate a bit?

[muel]

So either I didn't put this thing together right or it is extremely underwhelming to me. It seems so easy to find the woofers limits. Like EXTREMELY easy. Worries me that even the second one will not make a difference.

Considering your past and present subwoofers wouldn't just about EVERYTHING be underwhelming?

[CECAA850]

Put a meter? Elaborate a bit?

Do you have an SPL meter? If so, run some sine waves through it and see if the output matches the output described in the avsforum thread.

[CECAA850]

Considering your past and present subwoofers wouldn't just about EVERYTHING be underwhelming?

That's so true. Going from four 18's to a single 6 1/2 is going to yield a slight drop in performance. In my application, music in a 12 x 12 bedroom, it's more than enough.

[ClaudeJ1]

If you use a sub plate amp, you can run your speaker wires to the plate amp, then from the plate amp to the speakers. Just be sure your plate amp has high level inputs.

Any recommendations regarding a sub plate amp?

I have a couple of extra ones I will let go real cheap. I used to drive my MWMs with them. Do you still have my number?

[CECAA850]

Claude, certainly give Neil first choice on your plate amps but if you have another, could you PM me with details? Thanks.

Carl

[USNRET]

Carl, would two of these sitting vertically beside my L/R Belles work to fill in some bottom during 2 channel?

[CECAA850]

Carl, would two of these sitting vertically beside my L/R Belles work to fill in some bottom during 2 channel?

At lesser listening levels yes. Once you push the Belles they won't keep up though. You'd be better off with a Table Tuba. Maybe a narrow one under or around each one.

[Scrappydue]

well i am just gonna put the second one together and measure them both after. i just feel like i might have done something wrong on the first one. it has descent output but i almost feel like i can hear something buzzing inside at times. like i didn't get one panel tight enough. or maybe didn't tighten down the woofer enough? i didn't wanna strip the woofer but i fear that is what i did wrong maybe. not sure if i can get a little right angle phillips and fix that issus reaching through the throat?

[muel]

Are you using a 25hz high pass filter? I understand that is the minimum you need.

[CECAA850]

like i didn't get one panel tight enough

Air leaks between panels can kill output.

[CECAA850]

Are you using a 25hz high pass filter? I understand that is the minimum you need.

If you're using it for HT, yes but not really necessary for music.

[Scrappydue]

Are you using a 25hz high pass filter? I understand that is the minimum you need.

oh yeah!! I tried without and immediately bottomed it out. Lol but set it and made a big difference.

[DizRotus]

I've never used Loctite PL adhesive before. In the past, I've used Elmer's Carpenter glue or Titiebond when assembling enclosures from MDF or plywood. The strength of the resulting glues joints was sufficient. The surrounding material would fracture before the glue joints.

Nevertheless, for this project I decided to follow the directions of the designer and used PL. Right out of the tube (caulking gun) it has the consistency of Liquid Nails. My initial reaction was regret for not using Titebond rather than "chewing gum" to stick the panels together. Now that days have passed and it has cured, I'm, glad I followed directions . . . . for once.

The most obvious advantage of the more viscous PL is the way it fills any voids in the dado joints and squeezes out. Wood glue would not do that as well. Now that it has cured, it's hard and solid.

I used my Paslode cordless nail gun to connect the panels while the PL cured. I promise to provide some photos by the weekend. The tiny nail holes will be easily filled with vinyl spackle (see https://community.klipsch.com/index.php?app=core&module=search&do=user_activity&mid=6832) before priming and then 2 coats of Duratex. Despite the assurance of Duratex that primer isn't necessary on bare wood, their cautions about adhesion problems on wood putty, makes primer over PL residue a worthwhile precaution.

Edited January 3, 2014 by DizRotus

[DizRotus]

Claude, certainly give Neil first choice on your plate amps but if you have another, could you PM me with details? Thanks.

Carl

Carl-

I advised Claude that my plate amps needs have been met.

You might want to contact him directly.