Dynaudio BX30 Owner'S Manual Download

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BX30 Owner’s Manual

Box data

Power Amplifier

collector coupled quasi
complementary BJT

140 W

Phase Shift

20-150 Hz, variable

0-180

Frequency Response

+/- 3 dB

17-80/95/120 Hz

Internal cabinet volume

inner

76 litres

Bass Principle

reflex

Weight

net

29,9 kg

Dimensions

619

547 Mm

Crossover

Linkwitz-Riley

input

crossover frequencies

80, 95, 120 Hz

crossover slope

12 dB/Oct

output

crossover frequencies

95 Hz

crossover slope

12 dB/Oct

Connections

input

XLR female 3 pole

output

XLR male 3 pole

Impedance

input

20 k

Ω

output

Ω

Woofer

30 cm polypropylene cone
100 mm pure aluminium
wire voice coil

Cabinet

front baffle 22 mm MDF
cabinet 22 mm chip board

internal bracing structure

Summary of Contents for BX30

Page 1: ...BX30 subwoofer Owner s Manual and Safety Instructions Preliminary Version 990209 455 490 A ...

Page 2: ...c and related apparatus for household and similar general use Use only in environments where humidity is between 30 and 70 rh and temperature between 5 and 40 C EN 55103 1 Emission Electromagnetic compatibility Product family standard for audio video audio visual and entertainment lightning control apparatus for professional use EN 55103 2 Immunity Electromagnetic compatibility Product family stan...

Page 3: ... prong is provided for your safety If the provided plug does not fit into the wall outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being stepped on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Unplug this apparatus during lightning storms or when unused for long periods of time Attachments...

Page 4: ...icing 3 Maintenance 3 Sound pressure level 3 BX30 OWNER S MANUAL 5 Unpacking 5 INTRO 5 INLET SECTION 6 OPERATING PANELS 7 BX30 PLACEMENT 9 COOLING 9 MOUNTING 9 5 1 SYSTEMS 11 SOUND CALCULATOR 12 BX30 TECHNICAL DESCRIPTION 13 System topology 13 FLOW DIAGRAMS 14 BOX DATA 15 ...

Page 5: ...ve electro acoustic system which optimises bass output power for the music spectrum giving an advantage of up to 18 dB over conventional bass reflex designs Figure 1 The BX30 driver has a 6 dB point at 17 Hz which results in superb reproduction of the most demanding material An electronic filter limits the response to 22 Hz in order to prevent large excursion by sub sonic signals and rumble This f...

Page 6: ...and frequencies 50 60 Hz The voltage selector switch on the back panel of the subwoofer shall be positioned according to the required voltage in your area The manufacturer fixes the setting prior to shipping Caution Do not try to alter the voltage setting as doing so will result in a blown fuse Wrong settings may result in damaged electronics Fuse drawer The main fuse for the subwoofer is located ...

Page 7: ...ing point surpass 20 dB Protection Switch on the subwoofer and the LED turns red and for the next 5 seconds the protection circuit checks the amplifier When everything is all right the protection circuits switch the signal and speaker relays on LEVEL Calibration Adjustment of the subwoofer level Sensitivity Level attenuation of input signal 10 dBm consumer level signal 4 dBm pro level signal Mute ...

Page 8: ...R 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 Pin 1 Ground Pin 2 Non inverted hot Pin 3 Inverted cold If CROSSOVER High Pass is set on 95 Hz and the BX30 is turned off the relays in the amplifier will change and thereby the OUT signal w...

Page 9: ... units may be daisy chained using the input and output XLR connectors Large Active Systems The BX30 can be used as part of a large sound system to handle bass frequencies up to 120 Hz The phase adjustment allows combination with any mid range device and the integrated signal and power management makes the BX30 suitable for club and sound system installations It is also suitable for mobile use but ...

Page 10: ...d 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 The impulse response of the BX30 is almost perfect for a two octave 100 Hz band pass filter The impulse response Figure 7 shows the superior transient response of direct radiating systems compa...

Page 11: ...h larger spaces Our design chart gives SPL predictions for different rooms Please note these are narrow band or single frequency predictions not broad band levels which are much higher For example a single BX30 will produce 112 dB at 63 Hz at one metre enough to match nearly all near field monitors while eight units can satisfy the requirement for THX theatres of 1000 cubic metres at a distance of...

Page 12: ...91 3 21 20 10 5 1 120 100 2 10 0 700 1000 0 4 0 50 101 3 21 20 10 5 2 103 1 4 10 0 700 1000 0 4 0 50 84 4 54 20 10 5 2 113 10 4 10 0 700 1000 0 4 0 50 94 4 54 20 10 5 2 123 100 4 10 0 700 1000 0 4 0 50 104 4 54 20 10 5 4 106 1 8 10 0 700 1000 0 4 0 50 88 6 42 20 10 5 4 116 10 8 10 0 700 1000 0 4 0 50 98 6 42 20 10 5 4 126 100 8 10 0 700 1000 0 4 0 50 108 6 42 20 10 5 8 109 1 16 10 0 700 1000 0 4 0...

Page 13: ...l monitors 95 Hz for most subwoofer applications in stereo or part of a multi channel system 120 Hz for full 5 1 systems requiring a separate low frequency effects channel This mode is designed to meet Dolby DTS and THX criteria for theatres Additionally there is an internal spectrum equaliser and subsonic filter 17 Hz to ensure optimum sensitivity and maximum output from 20 Hz to the cut off freq...

Page 14: ...ble with a tool Right Left IN XLR OUT XLR VCA b Output relay b 60 h Temperature sensor Figure 8 Flowchart preamplifier 3 seconds Timer 0 fault 0 fault 0 fault 0 fault 0 fault 0 fault V 10 V 10 VCC 5 VEE 5 DC at amplifier Temperature 60 Bass level Red Protection indicator Green VU indicator h Green input Red input overload b f g Front of cabinet Front of cabinet Timer d e Input level right Input le...

Page 15: ... net 29 9 kg Dimensions w h d 41 619 547 Mm Crossover Linkwitz Riley input crossover frequencies 80 95 120 Hz crossover slope 12 dB Oct output crossover frequencies 95 Hz crossover slope 12 dB Oct Connections input XLR female 3 pole output XLR male 3 pole Impedance input 20 kΩ output 50 Ω Woofer 30 cm polypropylene cone 100 mm pure aluminium wire voice coil Cabinet front baffle 22 mm MDF cabinet 2...

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