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Multi-Way Conventional loudspeakers with crossovers

JBL LSR305 tweaking
JBL LSR305 tweaking
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Old 20th April 2018, 04:54 PM   #71
Juhazi is offline Juhazi  Finland
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Congratulations! Check what Elac did for the Debut 2.0! Debut 2.0 – Elac
Click the image to open in full size.
The crossbrace!
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Last edited by Juhazi; 20th April 2018 at 05:06 PM.
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Old 20th April 2018, 05:06 PM   #72
irribeo is offline irribeo  Netherlands
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you'll need complete redesign to move port to front and put tweeter and woofer closer together and remove amplifier from speaker cabinet, but nothing is impossible
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Old 20th April 2018, 05:14 PM   #73
Juhazi is offline Juhazi  Finland
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irribeo - the crossbrace was the only thing that I did for LSR305! Check post #1
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Old 20th April 2018, 07:14 PM   #74
tsharp is offline tsharp  United States
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Juhazi, thanks for the write-up and measurements of your mod! I've been using these speakers for about 3 years and have been quite impressed, but i'm always looking for diy mods. I'll be trying this one soon.

Did you happen to get measurements for your cross braced cabs with the back plates installed? It would be nice to see an overlayed response graph of both the modded cab and the stock cab fully assembled. My apologies if you already did this.
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Old 20th April 2018, 07:46 PM   #75
Juhazi is offline Juhazi  Finland
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^Yep, they are here JBL LSR305 tweaking
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Old 24th January 2019, 10:49 AM   #76
Bill Coltrane is offline Bill Coltrane  Netherlands
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Has anyone "cracked" the internal dsp filter of this thing?

I would love to implement filters using measurements of my individual speakers.
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Old 24th January 2019, 02:18 PM   #77
Juhazi is offline Juhazi  Finland
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I checked my measurements again, here better comparison of std vs. with center brace fix. Spl for distortion measurement is not equal - look at distortion details more than percentage!

In 0/30¤ response measurements diffrerences come mostly from slightly different position of speaker and microphone.

I can't help with dsp tweaking, sorry!
Attached Images
File Type: jpg jbl305 vs fix spl 0 15 12ms nosmo.jpg (121.9 KB, 65 views)
File Type: jpg lsr305 std vs fix 0¤ disto 97 93dB-vert.jpg (259.4 KB, 67 views)
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