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32 bit AD/DA converter , where and why used it?!
Old 2 weeks ago
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xcskier's Avatar

Originally Posted by pentagon View Post
That's max SPL and not dynamic range. Along those lines, max SPL:
The DPA 4003 is 154dB
The DPA 4007 is 159dB
The Josephson c617set is 146dB

Dynamic range would be around 122dB for the QTC50, 135dB for the 4007, 139dB for the 4003, 132dB for the c617set (depending on what numbers you want to look at)
Thanks for the list ! Interesting to see the approximate equivalents in dynamic range, and how they are weighted.

QTC50 is intended for quiet sources thus max SPL as you mentioned isn’t the best indication, assuming some mics will have a lower noise floor. (Human capacity is generally measured in dB SPL while dB V etc. would better serve electrical equipment, though the entire point would be to remain analogous to human perception).

Another mic for the list:

4004 - up to 168dB SPL before clipping occurs, dynamic range of 124dB from the noise floor to 1% THD and an extended headroom of 20dB up to clipping level due to the hi-voltage powering system.

4003 as you indicated lists 154dB max SPL thus the noise floor is lower we can assume (based on DR), and specs confirm.

4007 however has the same noise specifications as 4004, but lower max SPL.
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