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In the Forum: Horn-Loaded Speakers
In the Thread: Tweeter for Vitavox S2. High-sensitively ribbons?
Post Subject: Tweeter sensitivity measurements Posted by cv on: 10/23/2006
Allo Romy
Ok, I managed to get my measurement setup running. Behringer ECM8000/PC soundcard kind of thing.
I measured the following tweeters:
Focal TLR
TAD PT-R9
Aurum Cantus G1
Fane 5022
I don't have an absolute level calibrator and I need to take time to try and make the measurements accurately, ensuring the distances are correct in each case.
But having said that, if we assume each of these drivers is an 8 ohm load (I left the signal level and gains untouched), then I measured, in relative terms, sensitivities commensurate with the makers figures.
In other words, the TLRs (rated at about 95db/W and coming with individual calibrated response plots) were a db or two less sensitive than the PTR9s, which in turn were a bit less sensitive than the G1s.
Early indications are that the 102db/W is off for the G1. They don't sound like 102db either. But I think the PTR9 spec would seem to be honest, at least with my units. The Fane has such a crappy humped response it's impossible to draw any conclusions there!
Anyway, this is very rough - will try and find time to take some more careful measurements later in the week, hopefully tomorrow.
cheers
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