I've been looking for HE drivers to achieve reference levels with good on and off axis response. Eminence Delta 12LF appeals most as a mid at the moment, due to its good xmax, surprisingly smooth response and relatively low cost. Some Q's:
* this driver is designed for bass but is there any reason not to use it as a mid driver?
* theMagnum 12 HO driver appears similar, although it has a copper shorting ring and seems the cheapest to have this - any comments on this driver
* is there another driver I should consider that might be better?
* should I be concerned about the slight peak at the top end?
I want a 12" mid for the balance of bang for buck performance, controlled off axis response and not being too big.
Here is the response:
[IMGDEAD]http://editweb.iglou.com/eminence/Eminence/media/speak02/graphs/del12lf.gif[/IMGDEAD]
http://editweb.iglou.com/eminence/eminence/pages/products02/speakers/del12lf.htm
Magnum response:
[IMGDEAD]http://editweb.iglou.com/eminence/eminence/media/speakpro02/graphs/m12ho.gif[/IMGDEAD]
* What is the highest xo point that is likely suitable for this driver?
Could I use a notch filter to tame the peak and cross at 2.5k? Or should I cross as low as possible, say more like 1.7k?
Regarding a tweeter, I'm considering 2 options:
1) A planar or ribbon tweeter
2) Vifa DXT25 - the non ring radiator version 90.5 db 1w1m & 140w power handling >>> I'd add a waveguide to achieve +6db eff on the low end
This would be a digital active speaker with 8th order slopes crossing to a 12" vented sub at 80 Hz.
* Is lobing a problem with speakers such as this, or is it reduced with waveguides and larger drivers with higher directivity?
* this driver is designed for bass but is there any reason not to use it as a mid driver?
* theMagnum 12 HO driver appears similar, although it has a copper shorting ring and seems the cheapest to have this - any comments on this driver
* is there another driver I should consider that might be better?
* should I be concerned about the slight peak at the top end?
I want a 12" mid for the balance of bang for buck performance, controlled off axis response and not being too big.
Here is the response:
[IMGDEAD]http://editweb.iglou.com/eminence/Eminence/media/speak02/graphs/del12lf.gif[/IMGDEAD]
http://editweb.iglou.com/eminence/eminence/pages/products02/speakers/del12lf.htm
Magnum response:
[IMGDEAD]http://editweb.iglou.com/eminence/eminence/media/speakpro02/graphs/m12ho.gif[/IMGDEAD]
* What is the highest xo point that is likely suitable for this driver?
Could I use a notch filter to tame the peak and cross at 2.5k? Or should I cross as low as possible, say more like 1.7k?
Regarding a tweeter, I'm considering 2 options:
1) A planar or ribbon tweeter
2) Vifa DXT25 - the non ring radiator version 90.5 db 1w1m & 140w power handling >>> I'd add a waveguide to achieve +6db eff on the low end
This would be a digital active speaker with 8th order slopes crossing to a 12" vented sub at 80 Hz.
* Is lobing a problem with speakers such as this, or is it reduced with waveguides and larger drivers with higher directivity?