Speakerplans.com Homepage
Forum Home Forum Home > Plans > MT122
  New Posts New Posts RSS Feed - MT122 modification
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

MT122 modification

 Post Reply Post Reply
Author
Message
zALTEC View Drop Down
Registered User
Registered User
Avatar

Joined: 18 May 2005
Status: Offline
Points: 122
Post Options Post Options   Thanks (0) Thanks(0)   Quote zALTEC Quote  Post ReplyReply Direct Link To This Post Topic: MT122 modification
    Posted: 10 January 2006 at 7:40am
Hi all,
here i'm with some simulations of the MT122 horn.



Power is 300W at 8 ohms.
Black line is Martin Audio W8C simulation without the toroidal phase plug, red is the original single MT122 with P.Audio driver.
Green line is MT122 with the first part of the flare 10 cm longer, loaded with 18 Sound 12MB700 driver.
As you can see that should lower 30 Hz the cutoff frequency and allow ppl to cross at 120-150hz, making it more useable than the original MT122, as a bonus the ripple is reduced.

What do you think about that?

Regards
Back to Top
Jimbo View Drop Down
Registered User
Registered User


Joined: 07 March 2005
Location: United States
Status: Offline
Points: 420
Post Options Post Options   Thanks (0) Thanks(0)   Quote Jimbo Quote  Post ReplyReply Direct Link To This Post Posted: 10 January 2006 at 12:43pm

The sims shows it going well to 2K.  Can they actually get that high?

Jim

Back to Top
zALTEC View Drop Down
Registered User
Registered User
Avatar

Joined: 18 May 2005
Status: Offline
Points: 122
Post Options Post Options   Thanks (0) Thanks(0)   Quote zALTEC Quote  Post ReplyReply Direct Link To This Post Posted: 10 January 2006 at 3:15pm
I don't think they'll sounds fine over 1.2k (reflection problems?), consider that Martin Audio cross them at 750hz and with the phase plug!!
Another thing to consider is beaming, if simulations are true, at 2k you have 24°H x 33°V... a bit too narrow :D
Back to Top
SteveSmith View Drop Down
Registered User
Registered User
Avatar

Joined: 26 September 2005
Location: United Kingdom
Status: Offline
Points: 25
Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveSmith Quote  Post ReplyReply Direct Link To This Post Posted: 15 February 2006 at 4:39am
Hi, I saw your post about making the first part of the flare on the 122 10cm longer. Is the angle of the first part the same, so the sd at the end of the first flare is bigger?

and does the second part have to be a sharper angle so that the overall lenth of the horn is the same?

hope you can help, im gona build two 122's and the extra 30hz will really help
steve
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.141 seconds.