W6-2144 - Design time!!

[eusubius]

Makes sense. So how do I translate those text files into charts and dimensions? I used to model everything in win ISD, but i don't know that I need to see every parameter here.

Does cross section shape matter? Or just that the box is the right height, matching your total volumes? Or is there a graphic program that I could punch those text files into?

[eusubius]

Figuring dimensions. Your sizes are roughly 2cu.ft. and 3cu.ft.
So an 8" wide box (external with 5/8" wood) can be 48" tall, 12" deep (2 ft3) - pushing it to 18" deep puts it at the larger size, 3 ft3! That's a good size indeed.

What do you figure the difference is in LF extension? Output?

[GM]

Oops! So use to folks around here using Hornresp to a greater or lesser extent that the best way is to EXPORT/post the .txt file for download to HR's IMPORT folder, then load it into a proper RECORD to view, copy, save, rename, modify/whatever, so now's as good a time as any to install it: Hornresp

Official 'sticky' thread: Hornresp

GM

[freddi]

real nice response GM with your 85L MLTL.

[CraigSu]

Would someone be kind enough to post the Hornresp output/specs from GM’s .txt file for those of us who can’t run HR because we don’t have a Windows computer?

[perceval]

Originally Posted by CraigSu

Would someone be kind enough to post the Hornresp output/specs from GM’s .txt file for those of us who can’t run HR because we don’t have a Windows computer?

HornResp works using Wine. Simple install.

[eusubius]

Originally Posted by perceval

HornResp works using Wine. Simple install.

I plan to do plenty of wining once these speakers are built

[GM]

Originally Posted by eusubius

Figuring dimensions. Your sizes are roughly 2cu.ft. and 3cu.ft.
So an 8" wide box (external with 5/8" wood) can be 48" tall, 12" deep (2 ft3) - pushing it to 18" deep puts it at the larger size, 3 ft3! That's a good size indeed.

What do you figure the difference is in LF extension? Output?

Well, I grew up back when 3 ft^3 was a bookshelf speaker and still have a hard time enjoying the tiny, super inefficient speakers popular today for other than talk radio and similar.

Once you get HR going you'll see the internal height [i.d.] is ~56.19" i.d., so WxD isn't very big and have all the other details except for one and that's the vent location. HR can only show it going out the bottom, but will actually be ~56.19*0.848 = ~47.65" i.d. down from the top. If you look at the Power/Chamber/Combined you'll see that there's a 'Path' length distance to account for this.

As noted earlier both are tuned to ~36 Hz, so ~flat to ~40 Hz with the main difference being increased acoustic damping with the larger alignment, which in turn boosts the very bottom end a little bit.

Note too that when viewing the design, do it in the Loudspeaker Wizard [LW] as it shows it with stuffing and has some advanced features if interested.

Note too that HR doesn't take any associated acoustic damping losses into account, so see a lot of sharp peaks, etc., that are either much reduced or not there is reality, so if simmed really smooth with lots of stuffing it will tend to be over damped if one uses the recommended amount, hence my recommendation to damp to 'taste'.

Anyway, sure you'll have Qs like everyone else figuring out HR, but it has a large HELP FILE with a FIND feature plus the official thread and of course me and others to answer specific Qs if you can't find it on your own.

GM

[GM]

Originally Posted by freddi

real nice response GM with your 85L MLTL.

Yeah, it's got good specs for a RCA vintage style 'HIFI' speaker.

GM

[eusubius]

Ok, I'm learning more about Hornresp! Installed... Finally got both records imported to compare...

Question GM; why the big peak at 40hz in your design? The other looks perfect/flat.

(Btw started breaking these in... They sound beautiful already! Imaging... Bam! )

...

(PS bonus points if you can tell me what the little yellow drivers are)download_20190309_213531.jpeg