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A Speaker that Kicks Butt in Large Spaces
A Speaker that Kicks Butt in Large Spaces
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Old 28th November 2020, 10:03 PM   #1301
xrk971 is online now xrk971  United States
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A Speaker that Kicks Butt in Large Spaces
Make sure you follow the instructions on how to add padding on the front and rear chambers. It is important with a wooden cabinet to treat it or you will get a reverberant sound.

Mini Karlsonator (0.53X) with Dual TC9FDs

This is also linked at the bottom of Post 1 in Karlsonator thread. It is known as the wooden "Karlsonator Kurse" if not dealt with properly.
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Old 28th November 2020, 11:02 PM   #1302
EddieT is offline EddieT  United States
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X, what type of sq drive screws are you using? I was surfing Lowes looking for #6 pan head " to no avail. I have Kreg pocket hole screws but their too long for my ⅜" plywood on my little cabs.
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Old 28th November 2020, 11:13 PM   #1303
ripson is offline ripson  Europe
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xrk971, well it's too late for changes :/ I have no access to the inside of the speakers...


Click the image to open in full size.

I have already added 20mm melamine pads behind the speakers, on the back of the curtain there will be BASF Basotect 10mm as well, I have used 12mm Poroso felt anywhere else, hope it will be sufficient. There are no dividers anywhere. I have done it based on the project I got over 2 years ago

Last edited by ripson; 28th November 2020 at 11:16 PM.
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Old 28th November 2020, 11:56 PM   #1304
xrk971 is online now xrk971  United States
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That's fine what you have inside. It is the front chamber that is important to reduce the reverberation. You are good.
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Old 29th November 2020, 04:01 AM   #1305
ripson is offline ripson  Europe
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great that's a relief, thanks


btw these 16 Ohms 3FE25 are rather 13.2 Ohms



Click the image to open in full size.
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Old 29th November 2020, 04:05 AM   #1306
xrk971 is online now xrk971  United States
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That's correct, the Re is actually 12.3ohms. Drivers are often a bit lower than their impedance rating. Like 8ohm drivers are many times 6.8ohms or even 6ohms.

https://www.parts-express.com/pedocs...ifications.pdf
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Old 29th November 2020, 11:34 PM   #1307
ripson is offline ripson  Europe
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I have spent a few hours listening to them, in a short: awesome speakers! Very detailed, punchy bass, with brilliant 3D scene, I don't feel tired after hours of listening. Definitely worth building them.



The only thing that I am not sure if I like are the highs, a bit noisy and too much to my taste. For female vocales I still prefer EMI 92390BP but stil these are really brilliant speakers. I need to check with a different amp. They could be a bit more efficient. Tried them with Soren dac and F5.
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Old 29th November 2020, 11:44 PM   #1308
ripson is offline ripson  Europe
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Click the image to open in full size.


It's good to make sure the nuts of the the speaker terminals are screwed tightly, if not they might ring badly


Thank you guys for your help in making them, big thanks to xrk971
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Old 30th November 2020, 03:46 AM   #1309
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Those really look good. It might be cool to start a picture thread that's all Karlson related.
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Old 30th November 2020, 02:00 PM   #1310
ripson is offline ripson  Europe
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freddie, I am thinking about glueing 1mm thick sheet of lead to the aperture (on the internal wall) because I can feel it "trembles", I think it might bring some improvements, it will add about 0.4-0.5kg / 1 lb per aperture. Not sure if anyone did it before?
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