QWTL and Half WTL in the same BIB cabinet

[tizio_82]

Hi,
this is my first post, i'm pleased to write into this amazing forum. My current system is composed by marants CD 6000 OSE (I'd like to upgrade), trends audio 10.1; Triangle Titus 202.

my goal is to buid by myself a speaker able to cover 15K - 45 Hz (in the real world at -0 db) with SPL = 92 db 1W/1m at least

my idea is to use "Bigger Is Better" design with two drivers with active xover:
the first one: fullrange, untill 90 hz using the BIB cabinet design
the second one: woofer or mid woofer from 90 to 45 hz in the same BIB cabinet that will operate as quarter wave transmission line !

the stuffing material will be add empirically

what do you think about it?
is it possible or is just a wired idea?
and what about the drivers?

thanks,
feel free to beat me for my spelling and grammar.

Tiziano

[tizio_82]

I know, this project doesn't interest the major part of you, the thing is i'm looking for sense of weight and power that lack in my system, and I'd like to been iniziate to diy speaker.

I'll find new ideas.
bye Tizio

[Scottmoose]

Give people chance. It's the middle of the week.

I can't actually follow what you're trying to say too well. I think you're looking at making a 2 way BIB with a 90Hz XO point. Is that it? No reason why it shouldn't work. BTW -the BIB is technically a horn, not a TL.

[Tubamark]

Originally posted by Scottmoose
Give people chance. It's the middle of the week.

I can't actually follow what you're trying to say too well. I think you're looking at making a 2 way BIB with a 90Hz XO point. Is that it? No reason why it shouldn't work. BTW -the BIB is technically a horn, not a TL.

If I read correctly, Tizio seeks to use both drivers in the same enclosure/line . . . The line would seem very big to the Fullrange (BIB sized), but the same line will function as a more typically sized TL for the sub driver. I'm not sure where the drivers would be placed to achieve this.

Tizio, am I close? A drawing would really help.

I can't imagine this working well; Either driver could perhaps use the line/horn effectively, but NOT at the same time . . . the displacement created by the sub would prevent the FR from being able to drive the line at all. Your fullrange could even be damaged by pressure in the line from the sub.

Unless someone like Tom Danley is involved . . .

It also seems odd to use a BIB cab for a driver that will not be used below 90 Hz. I would vote to simply put the FR in its own enclosure. Or even no enclosure - open baffle!

Neat idea, though.

--- Mark

[GM]

Originally posted by Tubamark

I can't imagine this working well; Either driver could perhaps use the line/horn effectively, but NOT at the same time . . .

IIRC I've discussed this layout for a BIB, but can't remember in which thread. Anyway, it's based on this rather successful DIY design: http://web.archive.org/web/200705092...io/DIYBX1.html

GM