PRO AV CATALOG
Quarter-Wave-loaded 21" Installation Subwoofer System
Series: B-Series
Model: BQ211i
- Double-tuned, quarter-wave loaded high-impact subwoofer system
- 21” woofer with all-carbon cone for high pressure loading
- Large, rounded vent for improved breathing and low compression
- Force-ventilated 5.3” voice-coil for low power compression prolonged performance
- 15mm birch with extensive bracing brings lightweight yet rigid cabinet construction
The BQ211 is a quarter-wave loaded subwoofer system, extending the low frequency response of Alcons’ pro-ribbon systems, in both permanent and portable applications. Featuring a state-ofthe- art 21” Neodymium transducer, this subwoofer is designed to offer maximum, prolonged high impact SPL performance from a relative small footprint. For this, the latest materials and innovations have been applied: A very large displacement transducer with all-carbon fiber cone + dust cap, 5.3” voice-coil with vented triple-spider frame plus optimized low resistance impedance, and port-vented magnet structure to maximally reduce power compression. The extensively internally-braced cabinet features features double-tuned, high-pressure loading, through a rounded 236mm diameter low-tuned bass-reflex vent and a wide, high-tuned quarter wave tunnel. This provides optimised breathing at high SPLs, yet keeping the total system weight to a minimum. Slider feet on cabinet bottom and side enable stacking of multiple BQ211’s into vertical LF arrays: The additional front-positioned NL4 connector caters for easy “reverse connection” in cardioid arrays. The BQ211 is powered and controlled by the ALC amplified loudspeaker controller; Through the SDP™ (Speaker Drive Processor) circuit, the ALC offers BQ211-specific drive processing with response optimisation, dedicated power and excursion protection, hybrid filtering and cardoid processing. Through the SIS™ (Signal Integrity Sensing) circuit, the cable-length and connector resistance between the BQ211 and ALC is completely compensated (damping factor 10.000), further increasing response accuracy. The quarter wave pipe principle in combination with a low tuning frequency, forms a true wideband subwoofer with high SPL performance down to the lowest frequencies.
- Double-tuned, quarter-wave loaded high-impact subwoofer system
- 21” woofer with all-carbon cone for high pressure loading
- Large, rounded vent for improved breathing and low compression
- Force-ventilated 5.3” voice-coil for low power compression prolonged performance
- 15mm birch with extensive bracing brings lightweight yet rigid cabinet construction
- SIS™ pre-wired for very high damping and further reduced distortion (with ALC)
- Durotect™ flexible and scratch-resistant coating
- Warranty - Yes
- Spec Sheet available - Yes
- Maximum Frequency Response (Bandwidth): 150 Hz
- Maximum Frequency Response (Bandwidth): 0.15 kHz
- Minimum Frequency Response (Bandwidth): 33 Hz
- Minimum Frequency Response (Bandwidth): 0.03 kHz
- Impedance: 4 ohm
- Maximum SPL (Sound Pressure Level): 140 dB
- Sensitivity: 100 dB
- Depth: 38.82 in
- Height: 23.23 in
- Width: 29.49 in
- Product Weight: 158.73 lbs
- Warranty (Length/Type): 6 Years
- Frequency Response (+/- 3) dB: 33 Hz - 150 KHz
- Frequency Response (+/- 10 dB): 27 Hz -
- sensitivity (SPL 1W/M): 100 dB
- Maximum RMS power: 2000 W
- SPL (peak ALC 6): 135 dB
Suggested Products
Advanced Sound & Communication
3817 Broadway
Kansas City, MO 64111
USA
(816) 931-9525
www.advancedsoundkc.com