Brian Bunge
Senior HTF Member
- Joined
- Sep 11, 2000
- Messages
- 3,716
OK, Jack suggested and I agree that we should start a new thread specifically about this driver and possible applications for it.
Jack and I both received ours yesterday and I think I can speak for Jack when I say we are quite impressed with the build quality and massive size! We have discussed several applications in the past and everyone seems to agree that this monster was born to be used with a Linkwitz Transform Circuit. It has the necessary Xmax (25.86mm) and power handling (1000W!) to make this more than just feasible.
My current design is a 4ft^3 enclosure (assuming 5ft^3 stuffed). This design before adding stuffing yields an Fsc of 46.56Hz and a Qtc of .68. The transformed design has an Fsc of 18Hz and a Qtc of .5. Group delay maxes out right around 6ms at 34Hz and drops below that as we go down in frequency. The F3 is around 27Hz with an F6 around 19Hz. Both of these are anechoic, which means response should be even flatter in-room. The downside is a need for about 2.5KW around 10Hz but I doubt that I will have much 10Hz material and if I do I doubt it will be for more than a few seconds. I don't actually hit 2KW until 15Hz and I never get close to Xmax until 10Hz.
Jack had a bit of a different alignment which I believe was 7ft^3 (9ft^3 stuffed) and I believe an Fsc of 13Hz and Qtc of .5. I'll let him give all the specifics and correct me if I'm wrong.
There's also been talk of a ported enclosure. Jack mentioned 14ft^3 with an 8" port. Don't remember the tuning but the word that sticks out in my mind is "ungodly". I'm assuming we're talking well above reference with less than 1000W.
So that's what I've got from many of our conversations. If anyone else has one of these monsters please share how you intend to use it. Also, feel free to ask any questions or point out any inaccuracies. I'll continue to play with the LT alignments until I find what I feel will give me the best performance for my space limitations. Otherwise, that ported enclosure sounds menacing!
Brian
Jack and I both received ours yesterday and I think I can speak for Jack when I say we are quite impressed with the build quality and massive size! We have discussed several applications in the past and everyone seems to agree that this monster was born to be used with a Linkwitz Transform Circuit. It has the necessary Xmax (25.86mm) and power handling (1000W!) to make this more than just feasible.
My current design is a 4ft^3 enclosure (assuming 5ft^3 stuffed). This design before adding stuffing yields an Fsc of 46.56Hz and a Qtc of .68. The transformed design has an Fsc of 18Hz and a Qtc of .5. Group delay maxes out right around 6ms at 34Hz and drops below that as we go down in frequency. The F3 is around 27Hz with an F6 around 19Hz. Both of these are anechoic, which means response should be even flatter in-room. The downside is a need for about 2.5KW around 10Hz but I doubt that I will have much 10Hz material and if I do I doubt it will be for more than a few seconds. I don't actually hit 2KW until 15Hz and I never get close to Xmax until 10Hz.
Jack had a bit of a different alignment which I believe was 7ft^3 (9ft^3 stuffed) and I believe an Fsc of 13Hz and Qtc of .5. I'll let him give all the specifics and correct me if I'm wrong.
There's also been talk of a ported enclosure. Jack mentioned 14ft^3 with an 8" port. Don't remember the tuning but the word that sticks out in my mind is "ungodly". I'm assuming we're talking well above reference with less than 1000W.
So that's what I've got from many of our conversations. If anyone else has one of these monsters please share how you intend to use it. Also, feel free to ask any questions or point out any inaccuracies. I'll continue to play with the LT alignments until I find what I feel will give me the best performance for my space limitations. Otherwise, that ported enclosure sounds menacing!
Brian