BX30 subwoofer Owner’s Manual - and Safety Instructions Preliminary Version 990209 455 490 A
EXPLANATION OF GRAPHIC SYMBOLS The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
Important Safety Instructions Safety Read these instructions before any connection to the apparatus. Please keep these instructions in a convenient place. CAUTION To avoid electric shock, do not open the subwoofer. There are no user-serviceable parts inside. Installation If the BX30 have been stored for a longer period in an environment, where temperature was low or humidity high, we recommend that the BX30 is disconnected for at least three hours before use. Do not operate this apparatus near water.
CONTENTS SAFETY ................................................................................................................................................ 3 Installation .................................................................................................................................................. 3 Power connection........................................................................................................................................ 3 Attachments ...................
BX30 Owner’s Manual BX30 Owner’s Manual Unpacking Every loudspeaker leaving DYNAUDIO ACOUSTICS A/S has been carefully and thoroughly inspected and tested. When unpacking the subwoofer, be sure to check if any physical damage has occurred to the subwoofer due to shipping. In case of damage, please contact the selling dealer immediately. When unpacking the subwoofer, verify that the voltage switch is positioned according to area voltage requirements.
BX30 Owner’s Manual Inlet section Figure 2. AC inlet AC inlet Power switch This is a grounding-type plug. Do not connect to a convenient AC outlet on a sound system or non-grounding AC outlet. 0: 1: There is voltage on the amplifier. The Protection LED lights up, red. Voltage switch 115/230: The amplifier’s power supply can be used with various voltages, 115/230 V ~, and frequencies, 50/60 Hz.
BX30 Owner’s Manual Operating panels Figure 3. Subwoofer control panel LED Limiter: Lights up when the limiter circuits start protecting the woofer. The limiter does not affect the signals on the XLR OUT. Detect: When the input signal is above – 20 dB it lights green. If the line signal increases to 0 dB it turns red. The protection circuit also measures signal levels inside the subwoofer amplifier. If the level calibration is turned clockwise and the signal in one of the measuring point surpass –20 dB.
BX30 Owner’s Manual Figure 4. Output control and connectors CROSSOVER High Pass: Changes round the OUT line signals between : Direct: The signal on XLR IN connectors is directed to the XLR OUT. 95 Hz: The signal on XLR IN runs through a 95 Hz high pass filter, before it is send to the XLR OUT. IN L and R : Balanced line signal input. Pin 1 : Ground Pin 2 : Non inverted (hot) Pin 3 : Inverted (cold) OUT L and R: Balanced line signal output.
BX30 Owner’s Manual BX30 Placement Single Unit (Stereo) The correct location and phase alignment of the BX30 is essential to achieve accurate performance with any given system. The best results are usually achieved with the BX30 floor standing and at the same distance from the listening position as the main speakers. The unit should be placed at the centre point of a line between the main speakers if used as part of a stereo system.
BX30 Owner’s Manual Figure 5. Shows the standard 1/3 octave response in active bass extension mode with the crossover pre set to 95 Hz. The response offers a seamless match to any high quality monitor system but it is particularly well suited to smaller models with limited bass output capability. Figure 6. The flexibility of switching low pass and match high pass x-overs means the BX30 can be matched to any system with ease and accuracy. Figure 7.
BX30 Owner’s Manual 5.1 Systems Dolby AC3 format. The specification for each channel is strictly defined and the BX30 conforms carefully and accurately to that standard. The agreed sound level capability for the sub bass channel in film theatres is 115 dB in any one-octave band, in any seat. The BX30 can deliver this output with clean, undistorted power, which is equally suited to small rooms, or in multiple (modular) formats in much larger spaces.
BX30 Owner’s Manual Sound Calculator ONE BX30 AT VARYING DISTANCE D FOR 100WRMS POWER Freq.
BX30 Owner’s Manual BX30 Technical description System topology The BX30 is fully active with a sophisticated signal management system. The following features are provided as standard. Dual inputs and outputs fully balanced with automatic bypass in the event of power loss. The outputs are buffered and filtered with a 24 dB/ octave high pass network which forms a perfect 24th order crossover (Linkwitz-Riley) when the BX30 is set at 95 Hz Low Pass mode.
BX30 Owner’s Manual Flow diagrams IN XLR Input relay Passiv limiter High pass 95 Hz Line receiver Line driver Output relay Output switch L+ 24 dB/oct L+ Left Left OUT XLR Left Left L- L- b b R+ 24 dB/oct R- Right Right Right Right R- R+ b b Buffer Low pass 24 dB/oct 80 Hz Fix level Left Temperature sensor +4 dBm -10 dBm Mute d Level 24 dB/oct 95 Hz h a 60° f e 24 dB/oct 120 Hz Right = also adjustable with a tool Limiter Equalizer Subsonic Phase 0°-180° c Phase +
BX30 Owner’s Manual Box data Power Amplifier : collector coupled quasi complementary BJT Phase Shift : 20-150 Hz, variable Frequency Response : +/- 3 dB Internal cabinet volume : inner Bass Principle : reflex Weight : net Dimensions : w×h×d Crossover : Linkwitz-Riley crossover frequencies input output 140 W 0-180 ° 17-80/95/120 Hz 76 litres 29,9 kg 41 × 619 × 547 Mm 80, 95, 120 Hz crossover slope 12 dB/Oct crossover frequencies 95 Hz crossover slope 12 dB/Oct Connections
