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How about a 12?

73.42.214.122

In Reply to: RE: Any 15 with 96db for a f3 of 50 hz in a sealed box posted by merdy on August 04, 2023 at 08:01:59

Fostex FW305 should do 95dB in 3 cubic feet, with QT=0.5 at 50Hz, but a zero-feedback SET will bring the QT up to around 0.7.

Follow Ups:

RE: How about a 12? - Bill Fitzmaurice 18:05:36 08/04/23 (2)
The best f3 you'll get with the FW305 in a sealed box is 75Hz, with broadband sensitivity of 93dB.
- RE: How about a 12? - Paul Joppa 21:20:29 08/04/23 (1)
  That's perfectly true, if you use an amp with a high damping factor and/or a lot of wall absorption. My interest is in SETs, which usually run a DF around 2 to 3, so I added that calculation.
  
  And you're right about the efficiency too - I mistakenly applied a 20xlog efficiency calculation instead of 10xlog to the claimed 1.4% 2-pi efficiency. So yeah, 93.5dB/m/W. The spec sheet claims 95dB, which seems to be in the 800-2000Hz range, well above piston behavior and only on axis.
  
  I stand corrected.
  - I have added a 1 ohm resistor to the drivers and it helps with some set amps - merdy 11:34:13 08/06/23 (0)
    I did model the foster 12 and 15 but they drop around 60 hz
    So plan b
    
    P.s the vsac show in 2001 was the best thing ever
    Silence is golden duct tape is silver

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