60ndown's Merged Subwoofer Thread

Status
Not open for further replies.
Jump to Latest
#21
A well designed tapped horn has directivity -- how much exactly are you looking for? Lilmike has a 25hz TH designed for the 6.5 anarchy driver...

216827d1301781680-single-sheet-th-challenge-ss15-responsesidevsupright.jpg
 
#22
ive never tried a karlson, and after reading this i really want to..... 🙂

kenpeter said:
Find you the 1955 Radio Electronics "Karlson K15" plan.
Its intended as a full range, but excels at midbass.
Front chamber will throw huge volumes of air.
Reaches down plenty low enough for Rock...

I play bass guitar in Drop D, and this is what I use.
Its also great for drums, and will replicate kickdrum
like no other single cabinet of its size...

Claims wide dispersion, true enough for midrange if that matters.
But midbase kick is a floor hugging vortex thats quite directional.
Aim directly at the audience for optimal loading, this one defies
the usual logic. Does not load better facing into a wall or corner.

Plans here: 1954 Ultra Fidelity plan will do, same thing basically...
Karlson Plans
Its also qualifies as a one sheet wonder (Cut from a single 4x8).
Click to expand...
 
#24
#28
I'm looking for some creativity and imagination (for a sub)

i picked up an older powered sub today, its a ported 8" Onkyo, 70 watts, no x-over, just gain ?? !! 🙂

box is about 2 cubes and the port is about 4" wide and 6" long.

Onkyo SKW-100 Subwoofers Reviews


id like to build a much better box for it, using the same amplifier and driver.

and see how good it can be made to sound as an HT sub. low/medium volume only, only needs to get down to 30hz ( i dont care to much about the odd movie 20 and 16 hz material)

ive never built a T-line, is it as simple as a looooooooong box with the taper expanding evenly, and the flare opening behind the driver? (cant be that simple right, there has to be some math involved to make the front and rear wave match?

or just a small sealed box ?


anyone feeling creative/inspired?


:joker:
 
#33
60ndown said:
i dont have any way to measure the TS 🙁
Click to expand...

Do you have a multimeter than can measure voltage and current?

Do you have access to a 4 ohm resistor?

Do you have a computer with a sound card?

Do you have access to an amplifier?

Then you have all you need to to measure Fs, Qes, Qms and Qts.

To measure Vas, you'll need access to a box of some sort. The existing enclosure might work. Any enclosure that can present a small and measurable sealed volume to the driver should work. I've used buckets, saucepans..
 
#38
Honestly,

too much room for error on my part.

id hate to spend time, money and effort building a sub, only to realize a 18db peak @ 41hz,

being 1/8 inch off with my skill saw has no such ill effect 😀


Brian Steele said:
Do you have a multimeter than can measure voltage and current?

Do you have access to a 4 ohm resistor?

Do you have a computer with a sound card?

Do you have access to an amplifier?

Then you have all you need to to measure Fs, Qes, Qms and Qts.

To measure Vas, you'll need access to a box of some sort. The existing enclosure might work. Any enclosure that can present a small and measurable sealed volume to the driver should work. I've used buckets, saucepans..
Click to expand...
 
#40
Onix Rocket UFW-12HR Subwoofer

seems like it has a history of problems, but there is one for sale near me cheep. with the upgraded (hot rod) driver and amp (reason for selling is the amp develops problems at higher volumes, but ok at lower volumes)

shall i avoid it completely,

or does anyone know something that makes this sub a worthwhile 'try' ?? (fix amp/new amp in same box, good driver, cut the box up and make a birdhouse)?

Product Review
 
Status
Not open for further replies.
Top Bottom