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Multi-Way Conventional loudspeakers with crossovers

MTM sound characteristics
MTM sound characteristics
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Old 1st August 2020, 08:09 AM   #151
adason is offline adason  United States
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Quote:
Originally Posted by wonderfulaudio View Post
I certainly dont intend to spoil the fun.

However, I see an omni array since its is splaying even the highs to the sides as noted here
MTM sound characteristics

Can somebody explain what contributes to great sound in such a 7 tweeter design? If, its an omni that means the outer tweeters are crossed very low and are not contributing to narrow the directivity. A omni response is same as what we get with single tweeter, right? How are 7 tweeters better than 1 single tweeter when response of both is same? I am not able to understand the Tekton design, never mind the highly positive reviews online of the 7 tweeter approach. They dont seem to be getting any close to constant directivity that waveguides offer.
Better build it and hear for yourself
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Old 1st August 2020, 08:25 AM   #152
wonderfulaudio is offline wonderfulaudio
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Originally Posted by adason View Post
Better build it and hear for yourself
I have quite a few tweeters and wasnt sure of taking the plunge before seeing your build. Looks like I should build and hear.

What is your xover point of the build and whats the Fs of the tweeter? Generally, tweeters are crossed 2xFs but Tekton designs cross much lower than this rule. How low can we get relative to Fs? Cross at Fs?
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Old 1st August 2020, 09:53 AM   #153
Scottmoose is offline Scottmoose  United Kingdom
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Quote:
Originally Posted by wonderfulaudio View Post
I certainly dont intend to spoil the fun.

However, I see an omni array since its is splaying even the highs to the sides as noted here
MTM sound characteristics

Can somebody explain what contributes to great sound in such a 7 tweeter design? If, its an omni that means the outer tweeters are crossed very low and are not contributing to narrow the directivity. A omni response is same as what we get with single tweeter, right? How are 7 tweeters better than 1 single tweeter when response of both is same? I am not able to understand the Tekton design, never mind the highly positive reviews online of the 7 tweeter approach. They dont seem to be getting any close to constant directivity that waveguides offer.
It's not what most people would call omnidirectional since that would imply a spherical radiation pattern, or near-as in a practical room. It's just a coax that happens to be made up out of 7 tweeters instead of a cone with a single central dome. The outer tweeters are rolled off with a cascaded low-pass to avoid undesirable phase interactions. They can get away with crossing quite low because a/ the tweeters are themselves reasonably well-suited to lower crossover frequencies, and b/ at the bottom end of the passband they've got all 7 running, which gives about the same (or slightly more depending on model) emitting surface than a 4in midrange driver, significantly lowering distortion for a given SPL relative to a single tweeter.
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Old 1st August 2020, 02:33 PM   #154
xrk971 is offline xrk971  United States
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MTM sound characteristics
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Originally Posted by adason View Post
Hi X, thanks for the info about the capture button. I know about it. Since i have multiple dedicated laptops, the one with rew and soundcard is not set up with internet. I could transfer the capture with memory stick, but its just easier to use phone. I guess i am just lazy this way. I may improve over time
Ok, I would do the same if if no internet. A USB WiFI adapter is like $3 (China) and $10 (Amazon) in case you change your mind and want to make it connected.


TP-Link USB Wifi Adapter for PC N150 Wireless Network Adapter for Desktop - Nano Size Wifi Dongle Compatible with Windows 10/7/8/8.1/XP/ Mac OS 10.9-10.15 Linux Kernel 2.6.18-4.4.3 (TL-WN725N) Amazon.com: TP-Link USB Wifi Adapter for PC N150 Wireless Network Adapter for Desktop - Nano Size Wifi Dongle Compatible with Windows 10/7/8/8.1/XP/ Mac OS 10.9-10.15 Linux Kernel 2.6.18-4.4.3 (TL-WN725N): Computers & Accessories
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Old 2nd August 2020, 01:58 AM   #155
adason is offline adason  United States
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Its not that. I have laptops which perform admirably for decade. Like the one i use with soundforge and extigy to digitize my reel to reel tapes. If i put it on the net, windows update will essentialy destroy it.
It only works best as you buy it. Never update.
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Old 2nd August 2020, 02:26 AM   #156
xrk971 is offline xrk971  United States
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MTM sound characteristics
Good point. The updates keep making it more and more sluggish. Until one day it is so slow you are forced to wipe the HD and start over or upgrade to more powerful CPU, more memory and bigger HD.

I remember when an 80MB HD was considered big.

My laptop now has two 1 TB drives. They still get full.
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Old 5th August 2020, 09:26 AM   #157
LewinskiH01 is offline LewinskiH01  Argentina
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Originally Posted by adason View Post
Better build it and hear for yourself
Adason,

Great work. I'm interested.

I realize back on post #98 you told me you "do not shimulate", but I'm looking into it to learn. Attached planet10's depiction of the Tekton xo, which you linked to on #99.

Would you mind sharing which drivers you are using and the inductor values marked "xx mH" you are using, as well as any other parts you might have changed from this. I do not have the drivers nor the xo parts, and would like to shimulate to help me understand the design.
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File Type: jpg Tekton xo.jpg (114.5 KB, 75 views)
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Old 5th August 2020, 03:50 PM   #158
adason is offline adason  United States
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ok then, ashimulate this!

200 Onkyo Tweeters for $10 (Limit 2 cases per Cus
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File Type: png tekton-double-impact-TXO adason.png (26.4 KB, 47 views)
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