Fullrangedriver Forum

A place to hang out in the single fullrange driver community

You are not logged in.

#1 2005-10-26 08:41:01

fine
Member
Registered: 2005-10-26

12" back loaded

Hi!
I'm new on this forum but I think that ultimate sound should gave a 12" driver.
I want to build an back loaded horn and I need some links.
Any help is good.
Thank's.

Offline

#2 2005-10-26 13:40:36

talaerts
Member
Registered: 2005-08-10

Re: 12" back loaded

If it's a full-range speaker that you're looking for then I don't think that any 12" model will have decent enough treble. In fact the only 12" fullrange speakers I am aware of are PA speakers.
Perhaps you'd rather be interested in a coaxial driver?

Tom

Offline

#3 2005-10-27 04:32:10

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

Yes,I want to put G1250 -PAudio- and it's an PA full range but only 8 khz. in high cutt-off.So I put an tweeter to go up to 22 khz.
In other way,also I can put an coaxial driver.I heared an fostex F206 in a horn(back loaded) and an 12" BM12CXA also in a same type of horn.The difference is outstanding and the dinamics is also super.
The big problem is enclosure.Maybe you guys have a link.
Thank's.

Offline

#4 2005-10-27 18:22:47

ron
Member
Registered: 2005-07-27

Re: 12" back loaded

The difference is outstanding and the dinamics is also super.

I truly find it hard to believe that a 12" PA driver in the same horn has greater dynamics than the 206e. However i have been wrong many times before. What are the T/S parameters of the 12" driver please?
ron

Offline

#5 2005-10-28 00:41:17

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

I know it's hard to belived Ron but this is my impression;maybe it's 12"?
The horn with 12" is much bigger than FE206(1300x550x400mm).
What do you think about PAudio-coaxial driver on www.commonsenseaudio.com ?
Please guide me in this issue.
Thank's.
Description
    FULL RANGE LOUDSPEAKER
Size (in.)
    12.0
Nominal Diameter (mm)
    305
Standard Impedance (Ohm)
    8 Ohm
Power RMS (Watts)
    100
Power Program (Watts)
    200
Sensitivity 1w/1m (dB)
    98,9
Basket Material
    Stamped steel
Cone Material
    Paper
Poles Material
    1008 Cold Roll Steel
Magnet Material
    Ferrite
Voice Coil Material
    copper+kapton
Voice Coil Diameter (in.)
    2.0


Fs (Hz)
    41.0
Qts
    0.33
Vas (lt)
    97.62
Xmax (mm)
    2.5

Last edited by fine (2005-10-28 00:46:51)

Offline

#6 2005-10-28 07:37:07

ron
Member
Registered: 2005-07-27

Re: 12" back loaded

l would find someone who has used this driver and ask them about any little quirks the driver has. I would also request a FR curve.
I thought you ment a PA (public address) driver.
ron

Offline

#7 2005-10-30 11:18:07

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

No, it's "PAudio"-that is the name.
The first driver is G 1250-FULL RANGE and BM12CXA-coaxial driver who it's very linear speaker.
Check www.p-audio.co.uk  or  www.paacoustic.com
Another link who is guilty about this is  www.commonsenseaudio.com
Come on,tell me your oppinion about that because you have more experience in building speakers.
Thank you and respect,
Vali

Offline

#8 2005-10-30 11:54:47

ron
Member
Registered: 2005-07-27

Re: 12" back loaded

The two that got my attention was the S-12-64M. With a 2nd order XO to a ribbon or such at 6K it would perform well. However you are in the cone break up mode at that range, but seeing as most FR drivers operate in that range with little ill effects then it would be a good app in a TL/BLH( MKs key phrase here"compromised BLH") with the TL action starting around  40-45 hz.Gonna be BIG.
The second (as a strictly LF driver) is the S-18. Higher Qts would cause some problems at XO to a full range with lower Qts ,but i believe if you had a close Qts and SPL 2nd driver you could get to around 300 Hz at XO. Would be a good TL/TQWT app or even maybe aperiodic, (my fav,easy to tune)  less volume with a very good impedance curve.
Most impressive of the coaxial drivers is the 12cxhb as the curves from the LF driver and the HF horn appear to blend very well. Only problem i have had in the past with coaxial is sometimes the XO is a cheap/bad design and either comes in too early or late. All depends on who is making them.
ron

Last edited by ron (2005-10-30 14:37:07)

Offline

#9 2005-11-01 02:57:46

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

O.K.
So what sould I do?
My amp is two monoblocs in SE with tubes;not much power,you know.
What sould I choose?The 12" full range in tqwt or FE 206 in blh?
Regards,

Offline

#10 2005-11-01 09:00:19

ron
Member
Registered: 2005-07-27

Re: 12" back loaded

Let me think on that one, how large is your room and what are the dimensions?
ron

Offline

#11 2005-11-02 12:43:53

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

My living room is rather small:
5mx4m.
high is 3m.
Thank's.

Last edited by fine (2005-11-03 05:06:22)

Offline

#12 2005-11-04 11:47:15

fine
Member
Registered: 2005-10-26

Re: 12" back loaded

Anyone have a plans or link to a back loaded horn for 12" driver but for hi-fi audio,not PA?
Regards,

Offline

#13 2005-11-04 19:05:22

zobsky
Member
Registered: 2005-08-10

Re: 12" back loaded

look for designs by tannoy, electrovoice (eg. the aristocrat) etc ... you should be able to find links for back horns or horn loaded bass reflex etc

Offline

#14 2005-11-04 19:28:00

ron
Member
Registered: 2005-07-27

Re: 12" back loaded

Problem is room size. If the room length cant support a wave then its a mute point to make something that will provide for a lower frequency.I would go for the higher Qts value 12" coaxial in a TQWT and tune it in with series resistance, larger port size with some aperiodic tuning.
ron

Offline

Board footer

Powered by FluxBB