Operate the measurement microphones with 24V phantom power?

Yes, the measurement microphones M2230, M2211 and M2215 can be operated at lower phantom power voltages than 48 VDC at special applications without the XL2 Analyzer. The lower phantom power voltage reduces just the maximum sound pressure level of the measurement microphone. All other specified parameters remain applicable.

Maximum sound pressure level @ THD 3%, 1 kHz, Rp*:

Phantom Power  M2230  M2211 M2215 
48 VDC 139 dBSPL 144 dBSPL 153 dBSPL
24 VDC 128 dBSPL 135 dBSPL 142 dBSPL
15 VDC 126 dBSPL 133 dBSPL 140 dBSPL
12 VDC 122 dBSPL 129 dBSPL 136 dBSPL

(*Rp = 6.8 kOhm @ U = 48 V, 1.2 kOhm @ 24 V, 680 Ohm @ 15,10 V)