Impedance/Thiele&Small Measurements with DATSv2/REW

SDeSouza

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Preamp, Processor or Receiver
Music First Audio Classic
Main Amp
MC2 Audio MC750
DAC
Metrum Onyx
Computer Audio
Tidal
Front Speakers
Tannoy SGM15B
Cables
Digiflex, Mogami
Headphones/IEMs
Sony MDR 7506, AKG k712
Hi all, just registered!

My main speaker is the Tannoy SGM15B, using a 3839 dual concentric driver. The previous owner had re-coned the LF driver with Tannoy's "hard-edge" cone kit known to alter the T/S characteristics of the system, and I'm starting the process of measuring so I can build customized cabinets.

From the forum I'm looking for help/assurance that I'm using REW correctly to measure the drivers, and want to make sure the calibration process is correct...

The first thing is running the open circuit calibration. Easy enough. The resulting graph shows an impedance of 100R, is this the value for Rsense?

Short Circuit Calibration and Impedance reference Calibration are easy enough to conduct.

If I've got this down then I can move on to step two of measuring the impedance of the drivers and use the TS tool to get the necessary data.

Thank you,

Steve
 

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