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Mini Karlsonator (0.53X) with Dual TC9FDs
Mini Karlsonator (0.53X) with Dual TC9FDs
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Old 16th January 2021, 03:29 PM   #4051
Skylar88 is offline Skylar88  South Africa
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Hi X, I think you once calculated, or guestimated, 94dB or was it 96dB? for parallel 16Ohm 3FE25's.
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Old 16th January 2021, 03:52 PM   #4052
Grarea is offline Grarea  United Kingdom
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Thanks for posting those.
They look wonderful.

Inspiring.

I just received my delivery of foam board for my first crack in a couple of weeks time.
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Old 16th January 2021, 04:09 PM   #4053
xrk971 is offline xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FDs
I calculated 96dB based on 90dB at 2.83v. But it seems the spec I used was misquoted by Parts Express. Sorry about that, I should have been more careful and looked at the factory data sheet.

1W into 16ohms requires 4v as power is V^2/R. So the spec is 90dB at 4V and 1m.

Two in parallel is +6dB and 2.83v is -3dB from 4v. So net gain is 3dB for dual 3FE25-16 in parallel.

Or 93dB at 2.83v and 1m and 8ohms.
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Old 16th January 2021, 04:27 PM   #4054
Skylar88 is offline Skylar88  South Africa
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Thanks for correcting the calculation. .
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