Blueprint Series I  12"   ( 8 vrms 100% AM modulation @ 10% F )

Original version:

20 hz	30 hz	40 hz	60 hz
80 hz	100 hz

New version:

20 hz	30 hz	40 hz	60 hz
80 hz	100 hz

Adire Audio  DPL-12  ( 10.5 vrms 100% AM modulation @ 10% F )

20 hz	30 hz	40 hz	50 hz
70 hz	80 hz	90 hz	100 hz

Peerless XLS -12   ( 10.5 vrms 100% AM modulation @ 10% F )

20 hz	30 hz	40 hz	50 hz
70 hz	80 hz	90 hz	100 hz
Noise

The noise data is measured with the microphone near the edge close to the dipole null.  Note the area above a few hundred hz is quite clean compared to the Titanic below.

Shiva  ( 10.5 vrms 100% AM modulation @ 10% F )

20 hz	30 hz	40 hz	50 hz
70 hz	80 hz	90 hz	100 hz

Titanic (Original)  ( 8 vrms 100% AM modulation @ 10% F )

20 hz	30 hz	40 hz	60 hz
80 hz	100 hz	Noise

Titanic MKII   ( 8 vrms 100% AM modulation @ 10% F )

20 hz	30 hz	40 hz	60 hz
80 hz	100 hz