Aurum Cantus AC-180F1 WT3 specs.

[Thezeek]

Just got these today and tested one and thought I would post the specs for it. It is unbroken in. Fs 44.41Hz, Qms 4.012, Vas .7024 cubic ft or 19.89 Cubic Lt., Qes 1.182, Qts .913, Le .45 mH, Spl 83.66Db SPL 1W/1M, Z(max) 29.97 Ohms.

Any thoughts welcome. I wanted to use them in a transmission line speaker.

M Cote

[Ludo]

Just got these today and tested one and thought I would post the specs for it. It is unbroken in. Fs 44.41Hz, Qms 4.012, Vas .7024 cubic ft or 19.89 Cubic Lt., Qes 1.182, Qts .913, Le .45 mH, Spl 83.66Db SPL 1W/1M.

Any thoughts welcome. I wanted to use them in a transmission line speaker.

M Cote

Something doesn't seem right. Were these measured in free air or in a sealed test box? The Qes and Fs are much higher than the manufacturer's specs. while the sensitivity is much too low.

Louis

[Thezeek]

I measured them free air. Yes, very stange looking.
Second woofer had some changes in the measurments. Qts is .712, Qes .857, Qms 4.203 and Z(max) 41 Ohms.

I did get these second hand, new in box.

[Ludo]

I measured them free air. Yes, very stange looking.
Second woofer had some changes in the measurments. Qts is .712, Qes .857, Qms 4.203 and Z(max) 41 Ohms.

I did get these second hand, new in box.

The high Q will make these difficult to use in anything but a sealed box. I looked up the measured data for the 4 x AC130s that I bought and they also have a much higher Fs and Qts than specified with the Qts measuring between 0.5 and 0.6.

Are you doing the impedance and lead calibration with the WT3 before you take each measurement? I found that skipping these steps can sometime result in erroneous measurements.

Louis

[Thezeek]

Yes, I did the test lead calibration and the impedance calibration. I tested one of my Usher 8836A woofers and those specs looked like they should.
I was sure hoping for something better with these AC woofers.

Thanks for your input.