Here’s some verification: https://spicaspeakers.com/specifications/spica-tc-50-datasheet.php
Low-frequency alignment: sealed-box Q=0.78.
Crossover frequency: 2kHz.
Crossover: high-pass slope, approximately first-order, 6dB/octave; low-pass slope, fourth-order, 24dB/octave, Bessel; both drivers connected with the same polarity.
Frequency response: 60Hz-17kHz (-3dB).
Sensitivity: 84dB/W/m.
Low-frequency alignment: sealed-box Q=0.78.
Crossover frequency: 2kHz.
Crossover: high-pass slope, approximately first-order, 6dB/octave; low-pass slope, fourth-order, 24dB/octave, Bessel; both drivers connected with the same polarity.
Frequency response: 60Hz-17kHz (-3dB).
Sensitivity: 84dB/W/m.
Last edited by a moderator:
By the way, the Audio Critic review, available at the site I linked, states that Bau (the TC50 designer) specified the center of the woofer as the appropriate measurement axis. So if you’re tweaking crossover components to get the speaker to match the 4th order Bessel and 1st order acoustic responses, be sure the measurement mic is centered on the woofer.
Few
Few
