Celestion CS135 subwoofer

Celestion CS135 Subwoofer. Odličan u kombinaciji s Celestion i10.
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The CS135 subwoofer resembles most subwoofers designed specifically for operation in a three-piece system. Like the satellite speakers, it is a black box, though clearly much larger and weighing 21 pounds. Internally, the CS135 is a dual-chamber design, combining a 10-liter sealed enclosure with a 12-liter vented enclosure that opens into the room through a duct 3-3/4 inches in diameter.

The CS135 contains a single 8-inch woofer with a dual voice coil, driven at low frequencies by both stereo channels and generating an L + R (mono) bass output. The CS135 contains the crossover to the satellites, set at 112 Hz with a 12-dB-per-octave low-pass section feeding bass to the subwoofer and 6-dB-per-octave high-pass filters supplying middle and high frequencies to the satellites.

Celestion specifies the subwoofer's impedance as 8 ohms and its sensitivity as 86 dB SPL at 1 meter (matching that of the satellites). Its rated bandwidth is 42 to 112 Hz at the -3-dB points and 38 to 143 Hz at -6 dB. Celestion says the CS135 is suitable for use with amplifiers rated between 10 and 90 watts per channel.

The CS135 connects to the left and right speaker outputs of the amplifier feeding the system and to the inputs of the two satellites. The subwoofer is normally placed on the floor, either upright or flat, with the vent opening unobstructed. Like most subwoofers, it can be located almost anywhere in the room without impairing system performance. The owner's manual says the satellites can be placed either on stands or close to a wall (taking care not to obstruct their vents).