It is so far from optimal (for high fidelity) that none of the main driver manufacturers supply midrange drivers of that size. Physics dictates that a midrange for high fidelity is sized around 3"-5" and this is reflected in what Scan-Speak, SEAS, and similar offer. Too large a driver will beam and suffer more cone break up than a purpose designed midrange driver. In addition the requirements of a midwoofer will dictate a long stroke preventing the short stroke optimisations of the motor for midrange duty and the stiffer surrounds to better control the motion around the edge of the cone.
On the other hand a 6.5" is close to optimum for the lower midrange in a 4 way handing over to something like a 2" for upper midrange duty.
A 1" tweeter is likely to struggle for clean performance at high SPLs. You might look to a 1.5" tweeters or an AMT tweeters to get more cone area. A largish waveguide on the tweeter could both control directivity and boost SPL at the low end.
2"-4" drivers is typical. The benefits of a small tweeter tend to be lost if a waveguide is used to control directivity and so you will often see a 1" used.
High quality bass in rooms tends to require subwoofers distributed around the room which lessens the demands on the bass from the main speakers. A pair of 8" drivers or a 12" driver would be fine to cover bass duties above 50 Hz or so.
If you want high output down to 20Hz from the main speakers then you are probably going to need more cone area but how much will probably follow more from why you want the output from the main speakers rather than subwoofers.
The Beyma TPL-150H, with excellent detail plus exceptional dynamics, is a $550 tweeter with 102db/watt sensitivity which can sustain 125db@1m SPL.
SURE, you can run it off your iPOD with a 90db/watt 6.5" Beyma 6NDL38 which craps out at 110db@1m SPL, and confuse vocals with a 400Hz woofer crossover.
DYAMIC - FANANIC audiophiles cross in 97db/watt 12" midbass which can also maintain 125db@1m SPL from 1500-150Hz, and parallel a couple 97db/watt 18" woofers for 103db/watt to keep-up down to the 27.5Hz Low-A on a Grand Piano.
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Here's a little inspiration https://www.lautsprecherbau.de/Magazine/Lautsprecherbau-Magazin-2015/Mai-2015/_8-x-SB-240_8636,de,901222,12043
whats the XO from mid to bass? The driver separation from the mid to lower bass driver could cause lobig issues? This was pointed out in my speaekrs which have similar layout.
Interesting 4-way. Have you had the chance to hear them? views?
Wharfedale Jade 7 loudspeaker | Stereophile.com
Trying to send you a PM, but you have exceeded your quota - can you delete some msgs and PM me. Thanx, Joe.
Linkwitz's LX521
Electrical crossovers are at 120 Hz (LR4), 1 kHz (LR2} and 7.5 kHz (LR4)
the 8"lower midrange covers 120Hz to 1KHz.
Heard these at his home a couple of weeks ago. Quite simply, mindbogglingly spectacular. Never heard a speaker like those. Do confess that the best i have heard are limited to B&W, Martin Logan etc.
Andy, Line source, others, that driver seems to be covering much of the important range without issues?
Electrical crossovers are at 120 Hz (LR4), 1 kHz (LR2} and 7.5 kHz (LR4)
the 8"lower midrange covers 120Hz to 1KHz.
Heard these at his home a couple of weeks ago. Quite simply, mindbogglingly spectacular. Never heard a speaker like those. Do confess that the best i have heard are limited to B&W, Martin Logan etc.
Andy, Line source, others, that driver seems to be covering much of the important range without issues?
I am not sure quite what you are asking. The LX521 is an unconventional speaker and the cancellation of the rear and forward sound dictates the use of large drivers. Linkwitz opts for an 8" poly cone to better control the cone breakup. A conventional 4 way like the Salon 2 has the option to use metal cones and no breakup over the operating range. A large midrange cone may well be the best option depending on the objectives and constraints of the design.
The directivity of a 6" used as a midrange is only an issue if you don't use it correctly. Either cross over low to a capable tweeter, or cross it with a directivity match to a suitable wave guide.
I've begun wood working on my own WWMT project which is very similar.
I chose double 8" (Scanspeak Discovery 22W), because I wanted a somehow thin cabinet but with great impact so a large Sd. I don't require extended low because I'll use a W12 GTi up to 50 - 70 Hz.
I chose 6" for medium (Scanspeak Discovery 15M), because I wanted to keep things coherent both for look and sonority. I took a look at the 10F, read a lot of good critics about it but I was concerned about its size : I was a bit afraid of how a 4" will match the double 8".
The tweeter is also Scanspeak but Illuminator, D3004 602010, to achieve better performance for a still reasonable price tag (about 100€ if I remember well). The small front plate allow me to have a thinner upper side.
According to datasheets, the 22W is up to 800Hz, while the 15M can go as low as 200Hz. I've a wide range to play with for the woofer-medium XO.
The medium-tweeter XO is more constrained : the D3004 loose sensitivity below 2KHz, while the 15M is more directive after 1KHz. So the XO has to be between 1 and 2KHz, according to the datasheets.
I'll use active filtering on my HTPC so I'll be able to test various combinations of XO.
I'll know more after measuring my drivers, but I need first to complete a cabinet then buy a mic then learn how to use REW, etc. I'm far from being done !
I chose double 8" (Scanspeak Discovery 22W), because I wanted a somehow thin cabinet but with great impact so a large Sd. I don't require extended low because I'll use a W12 GTi up to 50 - 70 Hz.
I chose 6" for medium (Scanspeak Discovery 15M), because I wanted to keep things coherent both for look and sonority. I took a look at the 10F, read a lot of good critics about it but I was concerned about its size : I was a bit afraid of how a 4" will match the double 8".
The tweeter is also Scanspeak but Illuminator, D3004 602010, to achieve better performance for a still reasonable price tag (about 100€ if I remember well). The small front plate allow me to have a thinner upper side.
According to datasheets, the 22W is up to 800Hz, while the 15M can go as low as 200Hz. I've a wide range to play with for the woofer-medium XO.
The medium-tweeter XO is more constrained : the D3004 loose sensitivity below 2KHz, while the 15M is more directive after 1KHz. So the XO has to be between 1 and 2KHz, according to the datasheets.
I'll use active filtering on my HTPC so I'll be able to test various combinations of XO.
I'll know more after measuring my drivers, but I need first to complete a cabinet then buy a mic then learn how to use REW, etc. I'm far from being done !
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