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Fibre Glass MT121 Horns.
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ceharden View Drop Down
The 10,000 Points Club
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Joined: 05 June 2005
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 10:57am
There are some nice drivers by B&C,18Sound,PD that are suitable.  In fact the drivers I'm using in my twin 12" boxes can be horn loaded.

12PE32 is a real horn driver but it's ferrite so if you want to keep the weight down.....
12NDL76 is lightweight and will work well in a horn
The PD alternative is the 12MH25.
From 18Sound you could use the 12ND610 or 12ND710 both of which are quite reasonable money.

If you want to go P.Audio then the SN12B is the main option.
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adambomb View Drop Down
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Points: 3220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote adambomb Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 11:41am
I'm completely open to your suggestions... personally I don't care about weight (but then my rig isn't lugged about every week end).
 
Only suggested P.Audio as the drivers are available quickly (unlike PD) and they seams to be good value for money / well built.
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adambomb View Drop Down
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Points: 3220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote adambomb Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 11:50am
Shall I start with the SN12B... everyone happy with it? are the specs on the P.Audio site right? (as I notice some arn't)
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Tekasis View Drop Down
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 12:21pm
Any reason Adam why you'd go for the SN-12B over the SN-12MB ?
I heard a double 12'' mid cab (up & over) the other day loaded with a pair of P.Audios SN-12MB's & it sounded very nice.
 
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ceharden View Drop Down
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 1:06pm
@Tekasis: For a direct radiating cab, the SN12MB is the right driver, for a horn the SN12B has the correct parameters.

The SN12MB also has a smaller voice coil and lower power handling.

Adam, if you start the design around the SN12B any of the other drivers I mentioned should also work fine.
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adambomb View Drop Down
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Joined: 10 April 2006
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Points: 3220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote adambomb Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 2:48pm
Am I anywhere Near : (doesn't look right to me - told you I was a newb)
 
 
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Tekasis View Drop Down
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 8:36pm
Originally posted by ceharden ceharden wrote:

For a direct radiating cab, the SN12MB is the right driver, for a horn the SN12B has the correct parameters.

The SN12MB also has a smaller voice coil and lower power handling.

Adam, if you start the design around the SN12B any of the other drivers I mentioned should also work fine.
 
Thanks for that info mate. All this time I was thinking the 12B was a bass driver.
How do you think the SN-12B's would sound in your double 12'' cabs compared to the B&C's you got in there ?
 
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ceharden View Drop Down
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 10:17pm
I've looked at using the SN12B's but their parameters are heavily geared towards horn loading.  If you put them in a reflex box it would have to be quite small and tuned quite high and you'd still not get much in the way of low end out of them.  What you would get however is a very tight, well defined sound.  My experience of the P.Audio SN range is that they are good drivers for the money, however they can't match B&C etc for ultimate sound quality,power handling etc.

The drivers I use (currently B&C 12NDL76/12MH32, soon to be 18Sound 12ND710) are quite close to the horn loading end of the spectrum too but are just about usable in a reflex box.  Once I've put in a crossover at 120-160Hz I might as well have just used a sealed rear chamber but the reflex loading means that if necessary the cabs can be persuaded to do full range or a low crossover (70-80Hz say) to a sub only cab eg X1.  As it is I've had to put a +5dB low shelf at 160Hz to flatten the response down to the crossover point.

Bit of a deviation from the thread topic but hope that helps.
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Tekasis View Drop Down
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Points: 6492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tekasis Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2007 at 10:54pm
Cheers for that Chris. I've decided on what most of you guys say & buy top class stuff first time round, so will give one of these B&C's a try. Not the Neo ones.
 
I'll be trying out some 10's. I got my mind on the 10MD26, you know anything about this model ? You ever heard them ? Or from the spec you'd recommend different ? It's for use in a standard double 10'' A.S.S reflex cab for mids.
  
Nominal Impedance; 8 Ohm
Minimum Impedence; 7.2 Ohm
Nominal Power Handling; 350 W
Continuous Power Handling; 700 W
Sensitivity (1W/1m); 100 dB
Frequency Range; 80 - 4000 Hz
Net Weight 7.3 kg (16.1 lb)
 
I also want to get a couple B&C 12''s for some flared cabs but not sure which one to use as there are so many to choose from.
 
I remember the last time I heard Fable Sound System, & their double 12 cabs were loaded with B&C 12PE32 which sound superb. 
 


Edited by Tekasis - 17 May 2007 at 10:07am
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mykey View Drop Down
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Points: 9680 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2007 at 9:21am
Originally posted by adambomb adambomb wrote:

I have seen the Jan Audio ones... and they look great, but they are double 12".. I want single.. and I think (!?!) most other people do too... and that's still £150 each.. which equates to almost 3 times the cost price.
 
I know Jan Audio make a single 12" with a comp mounted in the mid horn... but these are a bit more pricey.
 
About reverse engineering another horn... could be done, but I think the end result would be better with an original mould... and it's also far more SP to build our own ay!
£280.00 a pair
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Richard Hart View Drop Down
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Points: 643 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Richard Hart Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2007 at 10:00am

Mykey. You are skirting around the subject...... What about the specs? Is this why they're so cheap?
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mykey View Drop Down
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Points: 9680 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2007 at 10:30am
http://zmatek.jinak.cz/diy/pbaudio/coaxialhorn12-2/show_construction.asp.html
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