The great Tang-Band Simul-build.

[raypalmer]

Well as most of you know, building two pairs of speakers at once is a lot quicker than building them separately. With that in mind I intend to build my own next pair of speakers along these which are being built for my father.


Here's what I want to build:


A 2" full-range driver in an sealed cab responding to the 100-300Hz area which will be supplemented on the low-end by a small subwoofer a separate cab giving me response down to 40-45Hz. I can't install sketchup on my lappy due to windows sucking so I'll have to illustrate what I mean on the OH's mac when she's not looking.


Here are my two preliminary driver choices:

http://solen.ca/pdf/tangband/w51138sm.pdf
http://solen.ca/pdf/tangband/w2852sh.pdf

It looks like crossing these two over at 400Hz would be good?

I'm thinking both cabs will need to be ported. I'd like front-firing because I don't have much room to space cabs from the wall with.

[raypalmer]

Here's a pretty crude sketchup...

[norman bates]

400hz seems fine.

The "fast" system is gaining popularity.

I suggest you cross the drivers where the baffle step -3db is.

Perhaps have the baffle be 11" wide (f3 = 400hz).

I wouldn't port the 2" driver, seal it for excursion ctrl.

I'd play with a pa active crossover until you are sure of crossover points and levels at the volume you listen at. And a 24db will keep the .2" driver cleaner or less harsh


I'm entertaining the w2-803sm for a small 4 unit mini array crossed at 200hz.

I like 200hz@24db LR crossover point. To me it keeps the mids in the full range driver.
A 6.5" is the cone area I like / need (dual 4" drivers). I tend to occasionall listen louder for movies.


Norman

[planet10]

From what i've seen, except for the alpairs, bandors, & jordans the 3" drivers do a better job than the 2" drivers.

dave

[Henkjan]

Originally posted by norman bates
The "fast" system is gaining popularity.

the attached foto is from a system I completed a couple of years ago, the TB W2-800 and the W5-876 cross over at ~500Hz, where the baffle step helped set the xover frequency.

[raypalmer]

Very nice Henkjan. How much bass do you get from that woofer?

[Henkjan]

an impressive amount considering the size. I had it tuned to 55Hz in 4 liters BR. it's the classical "Q: can you turn off the subwoofer, so I can hear the bass of the small thing? A: the sub is off..." in this size the bass is not very deep, but powerfull and only with stuff like 5 string bass or organ you'll want deeper bass

if you have the room for a larger box, put 2 in a TL and they realy shine, with nice deep and clean bass

[Godzilla]

Cool beans!

[planet10]

Originally posted by norman bates
The "fast" system is gaining popularity.

Here is another example:



We are quite chuffed with its performance, FF85KeN + SDX7 sealed, PLLXO at ~333Hz, The assymetrical slopes in the XO (2nd order on midtweeter, 1st order on woofer) help with BSC,

There are a huge number of potentially good combos for FAST these days.

dave

[Cal Weldon]

What is the FAST system?