Here's what Ron measured his 421A's at:
Re - 4 ohms
Fs - 38 hz
Qms - 4
Qts -.3
Qes - .33
Zmax - 52 ohms
Le - .49 mH
Vas - 8.5 cu ft
Eff - 3.86 %
Sens - 97.8 db/watt/1 m
If yours is an 8 ohm it may be an older version?
Here's what Ron measured his 421A's at:
Re - 4 ohms
Fs - 38 hz
Qms - 4
Qts -.3
Qes - .33
Zmax - 52 ohms
Le - .49 mH
Vas - 8.5 cu ft
Eff - 3.86 %
Sens - 97.8 db/watt/1 m
If yours is an 8 ohm it may be an older version?
Nothing like a great big pair of speakers to make your day.
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[url]www.calweldonconsulting.ca[/url]
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