Would you lend your interpretation of this speaker's sensitivity and impedance numbers, based on these measurements? Thank you
Agree,
Looks like a reflex impedance curve.
But you can still tell Re is around 6 ohms
So would have a nominal rating of 8 ohms
" average" sensitivity without crossover could be rated higher
if there is upper peaks. But I find it annoying when manufactures
weasel higher ratings with peaks.
SPL looks around 83 to 85 dB with crossover
so average SPL around 83.8 / 84 dB
Looks like a reflex impedance curve.
But you can still tell Re is around 6 ohms
So would have a nominal rating of 8 ohms
" average" sensitivity without crossover could be rated higher
if there is upper peaks. But I find it annoying when manufactures
weasel higher ratings with peaks.
SPL looks around 83 to 85 dB with crossover
so average SPL around 83.8 / 84 dB
This is what I figured myself. I wanted second opinions, because I'm considering blending these with Kairos bass modules.
How do you know? I can't see any information about the drive level used for the SPL curve shown in the first post. The voltage (or power) level used could be anything. I'd say it's impossible to derive a sensitivity (or efficiency) number from this diagram.
Nor is there a distance shown.
Even with the knowledge that the speaker is the Carrera, couldn't find where Paul Carmody specifically states measuring distance and applied voltage, though it is inferred:
https://sites.google.com/site/undefinition/diy-speaker-faqs/diy-faqs-driverimpedances
The Carreras are so good, I found it amazing people hadn't seem to make them into 3 way speakers and post about it.
Nah. Usually people measure at whatever is practical at their lab (drive levels, distance). It all depends on the specific setup of the given lab. Without any information on the setup or the level conversions applied to the data one simply does not know. Not specifying these information along with the curves is a bit fishy.
I made an educated guess. Below 300 Hz gray line represents theoretically calculated vented box frequency response based on woofer TS parameters - which is SPL at 2.83V/1m.
Impedance would be nominal 8Ω, but in really the impedance is “wild”. Use with a low Rout amplifier.
Sensitivity would be 85 dB.
dave
Sensitivity would be 85 dB.
dave
I couldn't find any reason the Carreras won't work with one of Mr Bagby's bass modules. But I posted this to see if I was misinterpreting the charts possibly. I can see it should work. I just need to decide which module to choose now. It's all down to the sensitivity