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This speaker was used for less than 6 months. The brand new cost more than 500 dollars for 1. Selling it cheap after dismantling.
Performance and electrical
Power Handling: 40W continuous RMS, 160W peak (at 8 ohms)
Frequency Range: 70 Hz - 17 kHz (-10 dB)
Sensitivity: 88 dB SPL/1W @ 1m
Maximum SPL: 105 dB (RMS) at 1m, 111 dB (peak)
Nominal Impedance: 8 ohms (transformer bypass)
Transformer Taps:
70V: 2.5W, 5W, 10W, 20W, 40W, bypass
100V: 5W, 10W, 20W, 40W, bypass
The Bose FS4CE is a passive, 40W (RMS) in-ceiling loudspeaker with a 4.5-inch driver, a frequency response of 70Hz - 17kHz (-10dB), and a 145-degree nominal coverage angle. It can operate in a low-impedance (8 ohm) mode or a constant voltage mode with a 70V or 100V transformer that has multiple tap settings.