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  As is always the case with a two-way active monitor, each B2031 is equipped with two separate power amplifiers – one for the low frequency driver and one for the tweeter (150 watts and 75 watts respectively).  The low frequency polycarbonate driver is 22cm in diameter and the high frequency duties are handled by a one-inch ferofluid-cooled titanium dome tweeter. The crossover circuitry consists of an active fourth-order witz-Riley filter kicking in at 2kHz. The enclosure also employs a bass reflex porting system to extend the low frequency drivers’ overall frequency response down to a quoted 50Hz.  Other features of the B2031s worthy of note include: protection circuitry to look after the drivers and amplifiers in the event of overload; and electromagnetic shielding to allow close placement of the B2031’s to TV screens and computer monitors without interference. At the back of the B2031s you’ll find a metal amplifier housing which extends about an inch or so beyond the ...

This is a Simple Sixteen Way Clap-Operated Switch Circuit Diagram . Control your home appliances without getting out of your bed. You just have to clap in the vicinity of the microphone used in this circuit, which you can keep by the bedside. You can switch on/off up to four different electrical equipment (TV, fan, light, etc) in 16 different ways.This circuit is built around timer IC 555 (IC1), CMOS IC 74LS93 (IC2) and five BC547 npn transistors (T1, T2, T3, T4 and T5). Transistor T1 is used as the preamplifier and the rest are used for driving the relays. Sixteen Way Clap-Operated Switch Circuit Diagram   A small condenser microphone is connected at the base of transistor T1, which is biased from resistor R1 (10 kilo-ohms). The clapping sound is converted into electrical energy by the microphone and amplified by transistor T1. The transistor output is fed to the monostable circuit wired around IC 555. Output pin 3 of the timer is connected to the clock input of divide-by-16 ...