40-120Hz Tapped horn?

[defwing]

Quick version : What do you think is the best solution to fill the area between 40-120Hz? I was considering two tapped horns(stereo), with a 8" driver or two 6".

Long Version : Currently considering Dayton Reference series in 8", winISD models a nice flat quasi-butterworth ported box. I cannot get flat response in a tapped horn yet. Also looking at a few peerless or hivi drivers.

The few rules of thumb for tapped horns I have read consist of low QES and fs 1.5x the tune. To get a 8" driver suitable for tapped horn in this range would seem like a PA driver, probably no good quality wise?

I am mostly interested in sound quality although I am seem obsessed with a flat response when designing speakers, is this ideal?

Currently the system has

12" Tapped Horn, quarter length is 20Hz. Have set crossover to 50Hz by ear. Higher frequencies sound terrible through it, hence the need for this. The system does feel empty in this region as a result.

2x Vifa midbass 6.5", .707 sealed. WinISD says -3dB is 70Hz, -1 is 90Hz. As far as 6.5" go, these have little low end.

[bjorno]

Originally Posted by defwing

...Quick version : What do you think is the best solution to fill the area between 40-120Hz? I was considering two tapped horns(stereo), with a 8" driver or two 6"...

Hi, defwing,
See my suggestion using dual Dayton ST210-8 in a T-TQWT.

Note the phase response as well as the needed low group-delay, a requirement for quality (SQ) integration to the other main top speakers.

b

[otto88]

Originally Posted by bjorno

Hi, defwing,

Note the phase response as well as the needed low group-delay, a requirement for quality (SQ) integration to the other main top speakers.

b

a very good point:
What parameters did you adjust to improve phase response and group-delay?

Thanks