MLTL floostander vs. vented bookshelf

[abn1701]

Hi!
What are the advantages of a MLTL design over a vented bookshelf
with the same driver (Vifa P17WJ00).
I'm asking that because I 'm going to build a pair with these drivers.
but a friend of mine told me that the bookshelf is the way to go.
I like better floorstanders and think the vifa's will perform very well in
a MLTL cabinet
By the way Paul K. calculated the frecuency response with a web design
and it looks pretty well.
Thanks in adcanced.

[Paul K.]

Re: MLTL floostander vs. vented bookshelf

If you prefer the bookshelf form factor, you can still build the same ML-TL as I modeled, but in a more compact height, simply by folding the line once. What you'd essentially be doing is make the internal height half as tall and doubling the depth (plus the thickness of the internal divider that folds the line).
Paul

Hi!
What are the advantages of a MLTL design over a vented bookshelf
with the same driver (Vifa P17WJ00).
I'm asking that because I 'm going to build a pair with these drivers.
but a friend of mine told me that the bookshelf is the way to go.
I like better floorstanders and think the vifa's will perform very well in
a MLTL cabinet
By the way Paul K. calculated the frecuency response with a web design
and it looks pretty well.
Thanks in adcanced.

[ClosetSciFiGeek]

Re: MLTL floostander vs. vented bookshelf

Do share the design?

[curt_c]

Re: MLTL floostander vs. vented bookshelf

Hi!
What are the advantages of a MLTL design over a vented bookshelf
with the same driver (Vifa P17WJ00).
I'm asking that because I 'm going to build a pair with these drivers.
but a friend of mine told me that the bookshelf is the way to go.
I like better floorstanders and think the vifa's will perform very well in
a MLTL cabinet
By the way Paul K. calculated the frecuency response with a web design
and it looks pretty well.
Thanks in adcanced.

Offhand, I can't think of a single advantage of a vented over a MLTL other than the vented enclosure may model smaller in size.

I'd go with Paul's design. I'm sure you won't be disappointed.

C

[Paul K.]

Re: MLTL floostander vs. vented bookshelf

The original design was described in abn1701's thread titled, "MLTL for Vifa P17WJ help". It was a floor-standing MLTL that someone else designed. I modeled it to answer a question from abn1701 on how much stuffing. That said, if I were building an ML-TL for this Vifa driver, I'd make it taller than the ~30" internal height as originally modeled so that a tweeter located above this Vifa would be at ~ear height. I'd make the internal height be 38" with an internal width of 7" and an internal depth of 6.5". I'd locate the Vifa's center 8" below (internally) the top, and I'd locate the center of the mass-loading port 3" above (internally) the bottom, using a port with a diameter of 2.5" and a length of 4.25". I'd use a stuffing density of 0.75 lb/cu.ft., resulting in a total of 6 ounces of stuffing, uniformly distributed by density in the top (internally) 19" of the cabinet (the top half). Doing so would result in the system response (red line) shown in the attached graph. And, thanks to Curt C. for his nice comment.
Paul

Do share the design?

[curt_c]

Re: MLTL floostander vs. vented bookshelf

I'd make the internal height be 38" with an internal width of 7" and an internal depth of 6.5". I'd locate the Vifa's center 8" below (internally) the top, and I'd locate the center of the mass-loading port 3" above (internally) the bottom, using a port with a diameter of 2.5" and a length of 4.25". I'd use a stuffing density of 0.75 lb/cu.ft., resulting in a total of 6 ounces of stuffing, uniformly distributed by density in the top (internally) 19" of the cabinet (the top half).
Paul

-If Vifa wanted a big hit in the DIY market, they would start producing the P17 again...

Now that sounds and models like a nicely turned out TL. Paul, as usual, is quite generous with his time and expertize. -But then you all knew that already...

C