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Multi-Way Conventional loudspeakers with crossovers

Decent midrange driver 250...1500 Hz
Decent midrange driver 250...1500 Hz
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Old 25th March 2021, 06:31 AM   #1
morgot9999 is offline morgot9999  Romania
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Default Decent midrange driver 250...1500 Hz

HI folks
Is I kind of made my impression about treble in my other post, above 1.5...2 KHz I'm gonna go with a small 1"CD + 90x40 horn
Below 250 Hz there's gonna be a 12" PA driver, something like Fane 12-500LF or Eminence Beta-12A.
I'll go 3-way active for crossovers (dBx, Behringer)

For midrange I would use a 4-6" PA driver or some FR, no experience whatsoever.
So, any recommendation for a reasonable priced driver (100EUR/USD) nice sounding, flat if possible between 250....2000 Hz?

Thanks
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Old 25th March 2021, 07:11 AM   #2
tmuikku is online now tmuikku  Finland
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Which horn are you using? Try match size of the mid to the horn so that they both transition from wide to narrow dispersion over about same frequency range. Hint: width of the horn about the same as diameter of the driver.

Most horns seem to be 8" or bigger and it is quite difficult to find 8" PA mid with hifi driver response, B&C 8pe21 is often mentioned and I have a pair but haven't tested them yet. I think there is more options in 6" category.
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Old 25th March 2021, 07:44 AM   #3
AllenB is offline AllenB  Australia
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Decent midrange driver 250...1500 Hz
90 x 40 is not round like cone drivers. Can you show beamwidth information, necessary to make a good decision.
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Old 25th March 2021, 07:46 AM   #4
morgot9999 is offline morgot9999  Romania
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Hi
These options I have in mind so far the horn:
B&C ME45
P.Audio PH-2370
P.Audio PH-4220
Fane FH.450
Eminence H290s
Exponentials, 90x40. Somehow, I don't like the sharp edges of CD horns.
My ceiling is quite low, 2.3m, so I'm afraid of the top side reflection. Reason for going at 40 vertical dispersion.

Last edited by morgot9999; 25th March 2021 at 07:49 AM.
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Old 25th March 2021, 08:01 AM   #5
tmuikku is online now tmuikku  Finland
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These seem all be 10" + in width, you are going to have a step in the horizontal polars at the crossover unless you cross below the horn has lost control of the directivity to a smaller than 10" + driver It means that if you EQ the on-axis response flat, the power response has some issues and the speaker sounds colored in room. It doesn't mean you cannot do it, you absolutely can but for better sound quality look for 10" or 12" mid driver for these horns or smaller horn for small mid driver.

Last edited by tmuikku; 25th March 2021 at 08:18 AM.
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Old 25th March 2021, 08:02 AM   #6
dave123 is offline dave123
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Faital Pro 8PR155 is a good candidate
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Old 25th March 2021, 08:31 AM   #7
tmuikku is online now tmuikku  Finland
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I'm using 8pr155 with STH100 horn and it is about good polars match but I suspect a 6" driver would be even better with that horn. Not going to use either on the next project, the 8pr155 has bumpy midrange like most other 8" PA mids I've looked. Yet to try the 8pe21 if it is better or not. The STH100 is beaming, very high treble has too small sweetspot and it is not good since I don't have dedicated listening space and position.

My suggestion is if your speaker can be big go for big mid driver and matching horn. If it needs to be small, go for small mid driver with matching horn. Big horn and driver will control directivity lower in frequency which should yield less early reflections in room in the critical mid band where ear is sensitive. 15" mid and horn will control directivity below 1kHz. It is compromise between size and "sound quality" in this regard. Some people like even omni speakers so the sound quality is considered by the individual.

Last edited by tmuikku; 25th March 2021 at 08:38 AM.
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Old 25th March 2021, 08:53 AM   #8
morgot9999 is offline morgot9999  Romania
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any thoughts on Eminence Alpha-6C?
Or still too small for the horn.

Would it be a dumb idea for two or three FailtalPro 5FE120 side to side, in a kind of horizontal array? to cover the width of the horn. Issues with comb filtering even at this low frequencies?

I have no issues with size, it just not have to be monstrous.
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Old 25th March 2021, 09:05 AM   #9
tmuikku is online now tmuikku  Finland
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For 6" driver a horn about 6" wide is about optimal.
If you have 15" horn three 5" drivers is about the same width so you might research what compromises arise from using multiple small drivers instead of one big and then decide if this is a route you should take. Speaker systems are full of compromises and cant avoid them, only taking educated decisions will get you to your goal with the project. Audio quality is just one of many, price and size and other "costs" are in the other cup. If you want a fast project and have a size and cost limits set by all means use wide horn and small mid. If you want to go deep into designing loudspeakers start researching the options and their compromises, but be sure to have goal set otherwise it takes many years to do the thinking and tinkering without ever getting a speaker finished Wise compromise taking will get you to the goal, or show you the goal is unrealistic. In either case thinking through the compromises as best as you can will help to achieve success.

Sorry I haven't suggested any drivers, so it is all off-topic kind of. Trying to help nevertheless. The Eminence is probably good driver as well as the various Faitals and many others, but they might not be what your project benefits depending on the whole system you are building.

Last edited by tmuikku; 25th March 2021 at 09:29 AM.
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Old 25th March 2021, 09:42 AM   #10
YSDR is offline YSDR  Hungary
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Check the B&C 8MBX51, relative smooth response, healthy sensitivity, superlow 3rd harmonic distortion in the intended band.
Test Bench: B&C Speaker 8MBX51 Midbass Woofer | audioXpress
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