Measurements were made at listening position with 1/3 octave warble tones, from 15.75 Hz to 16.1 kHz, generated with Speaker Workshop's sound generating functions. Measurements were made with a Radio Shack analog sound level meter, corrected for rolloff via the table on Eric Wallen's meter modification page. The response is +/- 1.5 dB from 15 Hz to 8 kHz, and +1.5/-2.5 out to 16 kHz.

    The low end was designed to reproduce full pipe organ fundamentals, including 32 foot pedal stops, and performs remarkably well in-room. The lowest data point is 15.75 Hz, one-third octave warble, and still right on track with the average midrange amplitude. At this level, you don't really hear it, but your ears pop and things are rattling. Turn it up a bit and it grabs you and shakes you! I have yet to test the max output at low frequencies, but I have measured 116 dB continuous on mid-bass (50-60 Hz) tones.

    The midrange cone-breakup peak at 5.7 kHz is clearly visible. The response at the high end tracks fairly well with the midrange response detailed on the satellite page, as expected. This helped me verify that both measurements were valid. The drooping tweeter response is puzzling; when I measured on a few earlier passes, it was flat out to 16 kHz, but when doing this measurement I consistently got 3-4 dB down. I don't know what changed between runs - tone controls & L-pad settings were verified defeated and consistent, respectively. Relocating the meter in the room didn't change the measurements, either. One interesting side benefit: I know I can still hear 16 kHz tones.

   Some relocation of speakers was necessary to eliminate room modes at the listening position. As it is, it is only valid when a lounge chair is pulled out into the room, about 4 feet from the back wall - but hey, one should be comfortable and relaxed while doing critical listening, right? Sitting on the couch against the wall, just behind the chair, produces a nasty 5-6 dB suckout around 180 Hz, plus a monster 5 dB peak at 90 Hz. There's an even larger peak (that I didn't measure) around 60-70 Hz if you leave the listening room and go into the kitchen. Ain't room modes fun? ;-)

Last Edited 09/16/1999