Westminster 12" fronthorn DIY ...

[Macca]

Sounds like the problem is that the DMT are sounding a bit lost in the large room, no doubt due to their curtailed bass response. Personally I'd save myself a lot of time and trouble and keep the DMT as they are and add two active subwoofers with DSP to fill in from 50 Hz down. Butchering the Tannoys to make some sort of Frankenstein horn/bass bin contraption sounds like it would be an expensive stab in the dark. Okay two proper sub won't be cheap but I guess you could build them yourself. And the DSP would give you maximum flexibility in tuning them to be just right.

[h-man]

@ Reffc ... thank you for your assessment.

Tolerance, respect towards those who those who think and act differently and the right to individuality are the core values ...
I am a dissident and my open mind feed my ego ... think and act, make your own experiences.


Thank you PaulStewart,

GRF ...
I had thought about that and stopped it because GRF has allegedly not enough bass (<60hz) for many people.
In the past, my own experiences has shown me, that backloadedhorns like GRF in similar size needs a special tuning for a special drive-unit (i.a. Q-factor) ... in short: Vd,Ah,Am,Xmax,k, upper/lower frequence limit 'versus' BL etc. ... in consideration of the position of the loudspeaker and acoustics in the room ... and so on.
Based on these experiences and other considerations, and taking into account the fact that I love a great variety of music style and
my listenig room is very special, I prefer to split the signal in bass+lowmidhighs ...
also to protect the DMT from powerful low frequency signals.

However, I'm curious about everything that happens (in life) ... and I'll visit SpeedySteve's site today.
Thank you for pointing that out.

[h-man]

Sounds like the problem is that the DMT are sounding a bit lost in the large room, no doubt due to their curtailed bass response. Personally I'd save myself a lot of time and trouble and keep the DMT as they are and add two active subwoofers with DSP to fill in from 50 Hz down. Butchering the Tannoys to make some sort of Frankenstein horn/bass bin contraption sounds like it would be an expensive stab in the dark. Okay two proper sub won't be cheap but I guess you could build them yourself. And the DSP would give you maximum flexibility in tuning them to be just right.

... exact.

[Macca]

Not sure if that means you like my suggestion or hate it.

[danilo]

Easy /direct suggestion :-) BUY a pair of 15" DMT 2's
Their twin 15's Will solve both your loudness and Bass concerns.

[h-man]

Easy /direct suggestion :-) BUY a pair of 15" DMT 2's
Their twin 15's Will solve both your loudness and Bass concerns.

Thank you ... but this is not what I want to do.

[h-man]

Sounds like the problem is that the DMT are sounding a bit lost in the large room, no doubt due to their curtailed bass response. Personally I'd save myself a lot of time and trouble and keep the DMT as they are and add two active subwoofers with DSP to fill in from 50 Hz down. Butchering the Tannoys to make some sort of Frankenstein horn/bass bin contraption sounds like it would be an expensive stab in the dark. Okay two proper sub won't be cheap but I guess you could build them yourself. And the DSP would give you maximum flexibility in tuning them to be just right.

@Macca: ... 'a bit lost in the large room' ... this is nearly the problem,
... and this what I want to do:

A 12" or 15" bass in BR for low freqency signals,
the 12"DMT's add with a fronthorn like the 15"Westminster ... (fronthorn Ah tuned to 12"Sd) - for lowmidhighs.

In short:


( ( ( ( Westminster 15" fronthorn/Ah, Am, Xmax, k _______ C O N V E R T _______ to a 12" fronthorn ) ) ) )


... with nearly the same lower frequence limit.
(Am stay the same > Ah convert from 15" to 12" > k in relation to Xmax.)


It would be helpfull an original Westminster blueprint (of this area) ... for reference purposes.
... or is there someone who would check the dimensions, please.

[paulf-2007]

To the OP, if a front horn is what you want then go for it, but please don't throw too much money at it. If you feel your room is too big and that's the reason for the front horn then the kind of front horn on the Westminster IMO won't give you the extra spl you need. But if you're set on it then I hope it works for you. If I had a large room I would use BMS compression drivers on a proper front horn and be done with it. I had BMS compression drivers on 200hz tractrix horns and liked them very much but active crossover problems destroying a ribbon convinced me to simplify my set up, but that's another story. Contact speedy Steve he started out with grf's and horns and then went all front horns.

[anubisgrau]

FWIW westminsters are anything but just a fronthorn. actually the least of their impact comes from that small and short waveguide.

[h-man]

To the OP, if a front horn is what you want then go for it, but please don't throw too much money at it. If you feel your room is too big and that's the reason for the front horn then the kind of front horn on the Westminster IMO won't give you the extra spl you need. But if you're set on it then I hope it works for you. If I had a large room I would use BMS compression drivers on a proper front horn and be done with it. I had BMS compression drivers on 200hz tractrix horns and liked them very much but active crossover problems destroying a ribbon convinced me to simplify my set up, but that's another story. Contact speedy Steve he started out with grf's and horns and then went all front horns.

@paulf-2007 ....
Thank you for your inspiration to walk the way with compression drivers.
I went this way in the 80s with Coral Drivers (alu-diaphagm) ... change to an identical model SAMMI sm-104 (phenolic!) ... to lowther c45 with horn ... and so on.
Since 10 years I lie in the harbour of contentment (... can it be said so in English ?) - with TANNOY.
Today I need a decent bundling of the natural DMT sound - I think this is the right way for me ... perhaps also for some other folks which are not happy with compression- drivers.