Audio XOver Click Board™

Product Code: MIKROE-4104

How Does The Audio Xover Click Board™ Work The Audio Xover Click Board™ uses three Butterworth filters (one for each speaker) with possibility of changing cutoff frequency between 120Hz, 90Hz and 70Hz. Butterworth filters are called maximally flat filters because, for a given order, they have the sharpest roll-off possible without inducing peaking in the Bode plot. The two-pole filter with a damping ratio of 0.707 is the second-order Butterworth filter. Audio crossovers are a type of electronic filter circuitry used in a range of audio applications, to split up an audio signal into two or more frequency ranges, so that the signals can be sent to drivers that are designed for different frequency ranges. Active crossovers are distinguished from passive crossovers in that whereas passive crossovers split up an amplified signal coming from one power amplifier so that it can be sent to two or more drivers (e.g., a woofer and a very low frequency subwoofer, or a woofer and a tweeter), an active crossover splits up audio signal prior to amplification, so that it can be sent to two or more power amplifiers, each of which is connected to a separate driver type.

Active crossovers as Audio Xover Click don't care how powerful your amplifiers are because they process the signal before it enters the amplifier. Active crossovers are also not very sensitive to temperature variations, so they can be very accurate, all the time. If one of the amplifiers channels in an active crossover system clips, the distortion only affects that single channel. SPECIFICATIONS Type Signal Processing Applications Audio crossover On-board modules MCP6H012 Key Features A frequency response independent of the dynamic changes in a driver's electrical characteristics, power amplifiers are directly connected to the speaker drivers, individual channel cutoff frequency selection... Interface GPIO Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 5V PINOUT DIAGRAM This table shows how the pinout on Audio Xover Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 NC Shutdown SDN 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 NC NC 6 MOSI SDA 11 NC NC 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description PWR LED GREEN - Power LED Indicator LHP SL1 Left Left channel high pass cutoff frequency selector; Left: 120Hz SLP SW1 Left Subwoofer channel low pass cutoff frequency selector; Middle: 90Hz RHP SR1 Left Right channel high pass cutoff frequency selector; Right: 70Hz