Russound Contractor Series Owner's Manual page 8

SPEAKER SPECIFICATIONS
8
Model: SP-C523
Description: Round 2-Way In-wall/In-ceiling loudspeaker pair
Woofer: 5.25" (13.3 cm) poly-mica
Tweeter: Pivoting 1/2" (1.3 cm) Neodymium Mylar
Cut-Out: 6.5" (16.5 cm)
Mounting Depth: 3.25" (9.5 cm)
Recommended Power: 5 - 60 watts
Efficiency: 88 dB (1W @ 1M w/1kHz)
Frequency Response: 60Hz - 20kHz +/- 3 dB
Nominal Impedance: 8 ohms
Model: SP-C623
Description: Round 2-Way In-wall/In-ceiling loudspeaker pair
Woofer: 6.5" (16.5 cm) poly-mica
Tweeter: Pivoting 3/4" (1.9 cm) Neodymium Mylar
Cut-Out: 7.375" (18.7)
Mounting Depth: 3.75" (9.5 cm)
Recommended Power: 5 - 75 watts
Efficiency: 89 dB (1W @ 1M w/1kHz)
Frequency Response: 55Hz - 20kHz +/- 3 dB
Nominal Impedance: 8 ohms
Model: SP-C550
Description: Rectangular 2-Way In-wall/In-ceiling loudspeaker pair
Woofer: 5.25" (13.3 cm) poly-mica
Tweeter: Pivoting 1/2" (1.3 cm) Neodymium Mylar
Cut-Out: 9.625" x 6.125" (24.5 cm x 15.6 cm)
Mounting Depth: 3.25" (9.5 cm)
Recommended Power: 5 - 60 watts
Efficiency: 88 dB (1W @ 1M w/1kHz)
Frequency Response: 60Hz - 20kHz +/- 3 dB
Nominal Impedance: 8 ohms