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Multi-Way Conventional loudspeakers with crossovers

A 4-way Horn speaker
A 4-way Horn speaker
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Old 4th February 2020, 12:38 AM   #91
hallcon83 is offline hallcon83  United States
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A 4-way Horn speaker
Hi Barry - It will be interesting to see how your measurements change with distance change . --- That's strange about miniDSP - I was just there a day or two ago and put three kits in my cart... I decided to wait a couple more weeks so i didn't finish paying for them - but I was at the pay button and it sure looked like they were going to let me buy them --

Dean
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Old 4th February 2020, 07:37 PM   #92
Mr BA is offline Mr BA  England
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Default minidsp - Focusing our R&D efforts

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Originally Posted by hallcon83 View Post
Hi Barry - It will be interesting to see how your measurements change with distance change . --- That's strange about miniDSP - I was just there a day or two ago and put three kits in my cart... I decided to wait a couple more weeks so i didn't finish paying for them - but I was at the pay button and it sure looked like they were going to let me buy them --

Dean
Hi Dean,
After an email question to them re miniSHARC kit, I got an email :-

Focusing our R&D efforts
miniDSP's portfolio and community keep growing and we can't thank everybody enough for all your support!

As you may have noticed, our platforms aren't "mini" anymore and the rising engineering complexity requires our full focus. Combine it with our dedication to a high level of support for our customers and we concluded that it was time for a change and refocus of our core markets.

Our management team therefore decided to focus our energy on boxed DSP platforms as they represent the bulk of our customers these days. Starting from mid of Q2 2019, we will slowly stop the sale of the DIY DSP kits (miniSHARC kit/nanoSHARC kit/2x8 kit etc) till we run out of stock. All boxed versions will remain active. Also note that our USB platforms (E.g. USBstreamer/ MCHStreamer/UMA series) aren't affected by this decision as they remain a key part of our portfolio.

Rest assured that miniDSP remains committed to building innovative platforms and will always be available to answer any questions you may have. Feel free to contact us if you have any questions.

Scroll down this page to see miniDSP Q1 - 2019 Newsletter

It could be that the ones you're after will still continue to be available. I would send them an email seeking clarification.

rgds Barry
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Old 4th February 2020, 11:25 PM   #93
camplo is offline camplo
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Originally Posted by Rewind View Post
4-way + a subwoofer is necessary, I think.
1. Midwoofer will most likely be an efficient 12-15", which will not play much bass.
2. A large horn that is crossed at 400Hz will not sound as good as a smaller horn at 2000Hz.
3. And a smaller horn will not sound as good at 5000Hz and up as a dedicated supertweeter with almost no horn.
Why would a large horn sound worse than a small horn, never heard this before?
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Old 17th February 2020, 07:18 PM   #94
Mr BA is offline Mr BA  England
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Default Measurements

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Originally Posted by hallcon83 View Post
Hi Barry - It will be interesting to see how your measurements change with distance change . --- That's strange about miniDSP - I was just there a day or two ago and put three kits in my cart... I decided to wait a couple more weeks so i didn't finish paying for them - but I was at the pay button and it sure looked like they were going to let me buy them --

Dean
Here are photos of some recent REW measures.
I started measuring on axis with JBL2405 @ 1.3m, then moved to 2.6m, then to listening position. You can see crossover points @ 249 Hz, 1190 Hz. I then applied a couple of time delays in Behringer. I don't know why there are a couple of extra peaks @ 1.2 & 1.4 kHz.Comments / suggestions welcome on how to proceed.
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File Type: jpg 1602_P1-6.jpg (109.0 KB, 335 views)
File Type: jpg 1602_P2-15RH.jpg (120.3 KB, 330 views)
File Type: jpg 1602_IMAG2023.jpg (421.8 KB, 337 views)
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Old 10th March 2020, 11:19 AM   #95
hallcon83 is offline hallcon83  United States
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Hi Barry, thanks for the heads up about miniDSP ,,, I Guess I should have bought sooner - LOL .... maybe for the best , but it looked handy for a temporary easy set up to get me close .
-- I found another dsp unit that looks rather Interesting - not sure for your needs - you will have to take a look, seems to be a step above . . . .

--https://www.madisoundspeakerstore.com/digital-signal-processors-dsp/accuton-dsp-192-4-111-module/

Best Regards,
Dean
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Old 12th March 2020, 12:39 AM   #96
hallcon83 is offline hallcon83  United States
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A 4-way Horn speaker
PS. Have you seen this? - rePhase, a loudspeaker phase linearization, EQ and FIR filtering tool
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Old 15th March 2020, 07:40 AM   #97
Mr BA is offline Mr BA  England
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Default Indecision

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Originally Posted by hallcon83 View Post
Hi Barry, thanks for the heads up about miniDSP ,,, I Guess I should have bought sooner - LOL .... maybe for the best , but it looked handy for a temporary easy set up to get me close .
-- I found another dsp unit that looks rather Interesting - not sure for your needs - you will have to take a look, seems to be a step above . . . .

--https://www.madisoundspeakerstore.com/digital-signal-processors-dsp/accuton-dsp-192-4-111-module/

Best Regards,
Dean
Hi Dean, thanks for the link. Initially I thought it was expensive, but can be bought cheaper in Europe. I still have more work to do finishing the speakers - difference on opinion with my wife.
Kind regards
Barry
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Old 15th March 2020, 07:47 AM   #98
Mr BA is offline Mr BA  England
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Originally Posted by hallcon83 View Post
Hi Dean,
Yes, thanks I've seen it before. I think rephrase involves a pc which is an Avenue I will explore when others have been exhausted. What progress are you making?
I may have more time on my hands due to travel bans not being allowed to travel to see my daughter & family in Okinawa.
Kind regards
Barry
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Old 26th March 2020, 10:29 AM   #99
hallcon83 is offline hallcon83  United States
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A 4-way Horn speaker
Hi Barry , been Busy -- and staying alive - LOL . I decided i wanted to try several different avenues, Iv'e got a lot of iron's in the fire at the moment , trying some crazy OB's, some MEH Horns, and some vintage Wharfedale W70 speakers that I got a great buy on ....
- Also bought into a Group Buy here on diyaudio of a RADICAL New speaker driver that's just been released ... Purifiā€™s PTT6.5W04-01A woofer -- Purifi's design reduces distortion by tens of dBs while remaining linear to extreme excursion levels. This promises to allow bass depth with low midrange distortion that is normally the providence of large speakers using 12 and 15 inch woofers in jumbo multi-cubic foot boxes , can be had from a ½ cubic foot / 15 liter enclosure 2-way system. , a lot of exciting options with them , with about 50% less distortion and a 6.5 inch driver that will do what some 12 and 15 inch drivers will do -- I want to try them in a FAST design first, and in a MEH Horn too!
-- Next I found a bunch of info on some vintage drivers that were getting Rave reviews on other forums and I got inspired to try them too, they are Zenith 49CZ852's they are Vintage 12 inch speakers that are a Full range driver --
- I haven't been exposed to enough designs so I thought I would give them a try --- I won two separate pair off ebay - In one bidding session a pair went for 512.00 + shipping - I backed out of that one - a little too rich for me .... LOL. I'm going to try some different set ups, including both a Front horn with them and a D'Appolito Open Baffle with the two pair of drivers , I also think I'm going to try another vintage idea and build the Open Baffles with sand between two layers of wood, Like Wharfedale SFB-3's ---- I picked up a bunch of vintage tweeters to try too - bought all at great/cheap prices. I have some ALNICO tweeters to try and horn tweeters too , also going to try adding the GR Research NEO-3 Tweeters in the OB set up ..... And for Bass I picked up several pairs of vintage 12 inch woofers to add to the mix. - I found some Wharfedale Alnico's , also found some 15 inch Sansui woofers too....... were going to have some fun --
- I am running out of cash so got to sell some stuff , picked up some vintage tube amps to restore and sell - my first foray into building my own tube amplifiers... this will also be practice before I tackle my VTL Deluxe 300MB Amps that died - they scare the bejeebers out of me with their Eight- KT88 tubes in each monoblock --
-- I do really plan on trying the Horns as well, but not sure about the Anima design yet -- I'm still not sure what to do for the bass ... I just have that to figure out , I may use a design from Inlow sound for the Bass horn, if I do things right I may be able to try it upright and on the ground. I may have to ask for some help on that idea... from him, well see .... well 5 AM time to get some sleep - LOL ........ I talk to much when I'm this tired.....

Best Regards, Dean

Last edited by hallcon83; 26th March 2020 at 10:51 AM.
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Old 26th March 2020, 07:05 PM   #100
Mr BA is offline Mr BA  England
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Default Photos please

Hi Dean,
Yes, we all need to stay safe.
Following our Prime Minister's address on Monday evening we were all told to stay at home until safe working methods could be arranged. We start again on Monday.

Can you show some photos of the different drivers, speakers etc.

Stay safe
Barry
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