Porn Horn MK2

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I've been crossing the 12" horn over at between 119 and 125 Hz and its ok with that. Its -3dB point is around 128Hz IIRC. 

I've mouded the phase plug around the P Audio SN12 B. Its a tight fit and I'm not sure if any other drivers profile will fit. 

The 12" horn comes with its own sealed rear chamber this time. 

Don't know how may people it will play to. Difficult question. Yes its going to be louder than a MT121. The clue here is that I'm having to add 2dB to the HF driver to get it to keep up with the 12" horn. And the HF drivers I'm using are about 105 to 106 dB 1w/1m. So its a loud 12" horn.

Might have to go the 2" throat with 4" dia so it can keep up with the 12. But really wanted to use a 1.5" with 3" dia to get up to around 17 kHz. If I have to use a 4" dia on a 2" throat then it might need bullets or a HF driver above it and it starts to get complicated and expensive. Think Martin F2.

Rog.

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Rog Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Rogers Archive Posts Joined: 23 March 2010 Status: Offline Points: 2166	Post Options Post Reply Quote Rog Report Post Thanks(0) Quote Reply Posted: 14 December 2006 at 7:06pm
	I've been crossing the 12" horn over at between 119 and 125 Hz and its ok with that. Its -3dB point is around 128Hz IIRC. I've mouded the phase plug around the P Audio SN12 B. Its a tight fit and I'm not sure if any other drivers profile will fit. The 12" horn comes with its own sealed rear chamber this time. Don't know how may people it will play to. Difficult question. Yes its going to be louder than a MT121. The clue here is that I'm having to add 2dB to the HF driver to get it to keep up with the 12" horn. And the HF drivers I'm using are about 105 to 106 dB 1w/1m. So its a loud 12" horn. Might have to go the 2" throat with 4" dia so it can keep up with the 12. But really wanted to use a 1.5" with 3" dia to get up to around 17 kHz. If I have to use a 4" dia on a 2" throat then it might need bullets or a HF driver above it and it starts to get complicated and expensive. Think Martin F2. Rog.

Mark James Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306	Post Options Post Reply Quote Mark James Report Post Thanks(0) Quote Reply Posted: 14 December 2006 at 7:37pm
	or you could use a 6.5" <3khz and 1" from there up.............
	insert silly sentence here

ceharden Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851	Post Options Post Reply Quote ceharden Report Post Thanks(0) Quote Reply Posted: 14 December 2006 at 9:47pm
	Sounds very good Rog, I've been trying to design a 12" horn but somehow I don't think I'd match anything you'll do! Will have to compare the SN12B if I can get hold of one with my drivers. You never know, they might work. Shame cos one is the 12MH32, I reckon a good driver for this application and the other a 12NDL76, not the smoothest but plenty of output and as light as an SN12B. I've also got some of the 18Sound elliptical 1.4" flares (60x40) which I'd like to use on top. (Maybe 18Sound Driver too) Would this be a good combo? As an aside I was mixing on and trying to get the setup right on a F1/F2 system tonight. EQ'ed it flat with ETF's software and it ripped my head off, had to back the top end off. Didn't quite get that right! Sounded ok in the end but it's all a bit old and tired, especially the F2B's. Reckon some of these horns might make a nice replacement top end tho. Sorry about all the questions, just getting excited at the prospect of some rather tasty new mid-tops!

Rog Members Profile Send Private Message Find Members Posts Add to Buddy List New Member Rogers Archive Posts Joined: 23 March 2010 Status: Offline Points: 2166	Post Options Post Reply Quote Rog Report Post Thanks(0) Quote Reply Posted: 20 December 2006 at 5:41am
	Got it. Played again with the HF horn and got it pretty flat up to 18KHz. The only affordable and light compression driver thats up to the job is the Beyma CP 755 Nd. Its a loud and good sounding driver. Tried the B&C equivalent and its not quite as good. Will post the plots soon and also will make some LMS programs avaliable for most of the popular LMS units. That way you can just download the program and know that you porn horn is flat. This is helped by the 12" horn having its own chamber that comes with the kit. And if you use the same drivers I did then there are no variables and your'e get the same plot I did. Might even do a passive 2 way crossover. Rog.

biotec Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 07 June 2004 Location: United Kingdom Status: Offline Points: 2932	Post Options Post Reply Quote biotec Report Post Thanks(0) Quote Reply Posted: 20 December 2006 at 1:54pm
	well you seem to have saved me the need build a kick bin between my 1850s and phillishaves. Seems like I'll just replace the whole mid-top. A very small point but my rebadged XTA doesn't have network connectivity so do you think you could post the parametric/delay/filter setting so that I can manually put them in when the new porn horns are for sale.

Heathrow_B_line Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 11 January 2006 Location: United Kingdom Status: Offline Points: 7339	Post Options Post Reply Quote Heathrow_B_line Report Post Thanks(0) Quote Reply Posted: 12 January 2007 at 3:27pm
	i phoned pap the other day and jethro says these will not be ready by the end of feb!!!!! and doesnt know when they will be ready to buy. interestingly though it sesms they will sell both mk 1 and mk 11 porn horns. can anybody confirm this??????
	Produce a killer sound. Take no prisoners.

biotec Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 07 June 2004 Location: United Kingdom Status: Offline Points: 2932	Post Options Post Reply Quote biotec Report Post Thanks(0) Quote Reply Posted: 14 January 2007 at 8:48am
	I've put an order down for 4 already, getting excited.

ceharden Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851	Post Options Post Reply Quote ceharden Report Post Thanks(0) Quote Reply Posted: 14 January 2007 at 11:20am
	But did they give you an idea of when you could get your hands on them? Have you seen any pics yet?

biotec Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 07 June 2004 Location: United Kingdom Status: Offline Points: 2932	Post Options Post Reply Quote biotec Report Post Thanks(0) Quote Reply Posted: 15 January 2007 at 3:51am
	late february was the estimation. Apparently the phase plug is a strange looking thing and the box is very different to the last version? There's some photos down at void if I can be bothered to travel.

Bryan M Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 17 July 2004 Location: England/Belgium Status: Offline Points: 2223	Post Options Post Reply Quote Bryan M Report Post Thanks(0) Quote Reply Posted: 23 January 2007 at 11:01am
	no need nick pics of it are here http://www.speakerplans.com/forum/forum_posts.asp?TID=8367

COWFOOT Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 26 September 2005 Status: Offline Points: 1088	Post Options Post Reply Quote COWFOOT Report Post Thanks(0) Quote Reply Posted: 24 January 2007 at 8:55am
	I wonder if the phase plug is very rigid?Can it withstand the force of flying beer bottles etc. I take it a speaker grill is recommended?

login4 Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 April 2006 Location: Wales Status: Offline Points: 1552	Post Options Post Reply Quote login4 Report Post Thanks(0) Quote Reply Posted: 24 January 2007 at 11:37am
	they do look pornographic i like the idea of of the passive x-over as well, better for the hire system. what sort of price are we talking here rog?.
	CELTIC SUBSONIC SOUND SYSTEMS