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Multi-Way Conventional loudspeakers with crossovers

4-way with dual 21", dual 15" & dual 8" + TPL-150. An IBWWMTM...
4-way with dual 21", dual 15" & dual 8" + TPL-150. An IBWWMTM...
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Old 9th January 2020, 05:17 PM   #1
ZACC is online now ZACC  Sweden
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Default 4-way with dual 21", dual 15" & dual 8" + TPL-150. An IBWWMTM...

Ok, time to start a new build.

This time it will be on the larger side...

Stereo IB's with dual Beyma 21PW1400FE per manifold Beyma Speakers - Beyma 21PW1400Fe 21" subwoofer speaker - Beyma 21PW1400Fe high power 2,800 watt 21" woofer for all bass applications. Beyma 21PW1400Fe and other Beyma 18" speakers here.

Midbass with dual Beyma 15P80FeN in sealed enclosures Beyma Speakers - Beyma 15P80FeN speaker - Beyma 15P80Fe Water Resistant Speaker, 1,600 watt 15" woofer for all mid-bass applications. Beyma 15P80FeN and other Beyma 15" speakers here. Great for indoor or outdoor use.

Midrange with dual Jantzen JA-8008 HMQ http://www.jantzen-audio.com/wp-cont...A-8008-HMQ.pdf

The higher frequencies will be taken care of a Beyma TPL-150B https://www.beyma.com/speakers/Ficha...mt-TPL150B.pdf

IB's are already up and running since a couple of years.

Midbass enclosures will be sealed (not ready yet) around 40L net volume per woofer, 2 per side. Expected to be crossed 80 - 300 Hz.

Midrange enclosures will also be built sealed with a volume of about 15L per box. 1 driver per box. 2 per side. 300 - 2000 Hz.

TPL-150B with open back into sealed stuffed cavity modification from 2000Hz.

It will be a IBWWMTM...?

This will be an active 4-way system with Minidsp OpenDRC-DA8() and Crown XLS amps for the woofers and Firstwatt M2's for the mids and tweeters. Expecting 100dB+ sensitivity.
I'm a total noob when it comes to Minidsp so this will take some time to learn. Done some studies already and it does seem quite easy to get started anyway. Time will tell.

If somebody has a better suggestion than the OpenDRC-DA8 for X-over and DSP duty, please do tell. We have no secrets...

/Z

IBsub.jpg

IBsub2.jpg

Top2.jpg

Top1.jpg
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Old 9th January 2020, 06:04 PM   #2
ErnieM is online now ErnieM  United States
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Looks pretty fun! Reminds me of this setup a few years back.

Active high dynamics/SPL & high performance loudspeaker system for my living room…!
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Old 9th January 2020, 06:04 PM   #3
mlee is offline mlee  Canada
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Whoa! That's gonna be loud!

Not sure how far you can push the TL150 Xover but as you know the lower the better for MTM. Doing an MTM with 8" woofers puts a lot of strain on the Tweeter. Might want to entertain small mids or go TM instead? Maybe a quick prototype or separate enclosures for the Tweeter and Mids so you can test topologies?
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Old 9th January 2020, 06:08 PM   #4
ZACC is online now ZACC  Sweden
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"Might want to entertain small mids or go TM instead?"


I have heard the older version of the 8008's in a MTM with a ribbon.
Best midrange I've ever heard...
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Old 9th January 2020, 06:11 PM   #5
mlee is offline mlee  Canada
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Cool! I might have bee concerned with the C2C spacing but if it sounds great then perfect!
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Old 9th January 2020, 06:31 PM   #6
ZACC is online now ZACC  Sweden
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Quote:
Originally Posted by mlee View Post
Cool! I might have bee concerned with the C2C spacing but if it sounds great then perfect!
Well, let's hope. I have not heard this setup yet.
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Old 9th January 2020, 10:38 PM   #7
LineSource is offline LineSource  United States
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Several TPL-150 owners favor a crossover above 1,600Hz, which will produce lobing in an MTM configuration with 8" midrange. A few commercial designs use a T-M-W configuration with high efficiency(97db) pro sound 8" midranges and a 15" woofer. I have also seen designs with a pro sound 6" midrange for a 2,000Hz crossover frequency.

Faital 8PR200 gets high reviews. I would use this driver to a good 15" woofer.

B&C 8MDN51 uses a higher Fs to produce higher efficiency
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Old 10th January 2020, 08:40 AM   #8
ZACC is online now ZACC  Sweden
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Quote:
Originally Posted by LineSource View Post
Several TPL-150 owners favor a crossover above 1,600Hz, which will produce lobing in an MTM configuration with 8" midrange. A few commercial designs use a T-M-W configuration with high efficiency(97db) pro sound 8" midranges and a 15" woofer. I have also seen designs with a pro sound 6" midrange for a 2,000Hz crossover frequency.

Faital 8PR200 gets high reviews. I would use this driver to a good 15" woofer.

B&C 8MDN51 uses a higher Fs to produce higher efficiency
Thanks for the input LineSource.

I already have all the drivers and my mind set on this setup so I will just have to see (hear) how much this lobing will affect the end result. Also, in this project I have other priorities that are much higher on the list than off axis response. If it becomes a major issue, well then I have learned something the hard way (won't be the first time for me). All ideas for improvement are welcome, learning all the time.
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Old 10th January 2020, 06:48 PM   #9
ZACC is online now ZACC  Sweden
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First time I've measured anything (audio related, that is...)

Raw subs in 6 different positions. And now?




6 points sub.jpg
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Old 10th January 2020, 07:03 PM   #10
mlee is offline mlee  Canada
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Eq those sealed subs to 20hz flat?
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