Active Studio Subwoofer

Active Studio Subwoofer
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As consumer technology advances at ever faster rates, professional technology increasingly finds itself trying to keep up. An example of this is the advent of the Blu-ray and other high definition formats that have increased the audio channel count to 7.1.

The KH 870 is an answer to these new demands by offering a new 7.1 High Definition Bass Manager™ This is compatible with all standard consumer formats from mono through to the latest 7.1 HD systems. Eight channels of analog inputs ensures flexible interconnectivity for modern studios. Four-mode LFE-channel processing guarantees compatibility across all formats and industries. Forth-order crossovers and flexible acoustical controls allow for seamless system integration. Built-in volume control and a hardware remote control allows for centralized system control independent of the source, and the electronics can be remote located to reduce cabling

The latest amplifier technology and acoustical components have been used to ensure the most accurate sound reproduction possible. Robust drivers, a rock-solid cabinet, and carefully designed ports guarantee a tight, articulate, and distortion-free low frequency reproduction, even at high replay levels. Using the sum output, Plane Wave Bass Array™ (PWBA™) techniques acoustically improves lateral consistency in the listening area. The bass extends down to 18 Hz.

The KH 870 subwoofer is designed to complement our extensive range of monitors, and can be used on its own, or daisy-chained to make larger systems capable of higher SPL. The KH 870 can be used in music, broadcast, and post production studios for tracking, mixing, and mastering.

Features:

-Woofer 2 x 10" (265 mm) front-firing drivers, magnetically shielded
-Frequency Response 18-300 Hz ±3 dB (-3 dB free field)
-19-300 Hz ±2 dB (pass band free field)
-Noise < 20 dBA @ 10 cm
-Output 40 Hz @ 95 dB SPL @ 1 m (sine wave output with < 0.5% THD)
-SPL 116.7 dB (half space @ 3% THD)
-112 dB (pink noise, half space @ 1 m)
-(averaged between 40-90 Hz)
-Amplifier Output 320 W continuous, 400 W peak (THD < 0.1%)-
-Controller Analog, active
-Crossover Frequency 80 Hz
-Slope 24 dB/oct
-Equalization Low Cut: 30 Hz, 0 to -12 dB
-Parametric: bypassable
-Parametric Gain: +4 to -12 dB
-Parametric Frequency: 20 to 120 Hz
-Parametric Q: 1 to 8
-Delay Flight Adjustment: 0 to 4.69 ms @ 80 Hz (4-step 0, 45, 90, 135) -180° switch
-Volume Control Hardware remote or RS-232
-Calibration Internal signal generator
-Protection Peak and thermo limiters
-Filter Infrasonic, 6.5Hz, 12 dB/oct
-Remote Control CAT-5
-Input/Output Signal 7.1/7+Sum
-Impedance 13k ohms (XLR)
-Input Sensitivity -8 and +6 dBu
-Input Level +19 dBu (6.9 Vrms) per channel
-CMRR > 60 dB @ 15 kHz
-Isolation Interchannel: -95 dB, ±0.1 dB (1 kHz, level matching)
-Control Range 118 dB, 0.25 dB resolution
-Dynamic Range 110 dBA, < 0.001% THD+N @ -100 dB
-LFE Gain Range Modes: 80 + re-routing, 80, 120, wide
-Gain: 0/+10 dB
-Gain Control +2 to -12 dB
-Indicators Power On: Red LED
-Limit/Clip: Red LED flashing
-Bass Management Active: Green LED
-Power Requirement 100-120 or 220-240 VAC, switchable
-Power Consumption Idle: 30 W
-Full Output: 550 W