Parametrik Tone Control

Middle Frequency Equalizer with Parametric Feature

Posted Jan 17, 2012 at 9:14 am

Figure 1 

The circuit was designed to produce an equalizer that would cater the middle frequency signals with limited and parametric attribute.

• Equalizer – a passive or an active electronic element or circuits (like tone control) used for the reason of altering or flattening the frequency response characteristics of a system
• NE5532 – an internally compensated low noise dual operational amplifier with features such as full power bandwidth up to 140 KHz, input noise voltage of 8 nV, common mode rejection ratio, 9 V/us slew rate, high DC voltage gain, 32 V peak to peak voltage swing, wide supply voltage range from 3 V to 12 V, unity gain bandwidth at 10 MHz, and internal frequency compensation

The circuit can be used with any other audio circuit although it is normally connected to the microphone line balance unit. The circuit is comprised of two parts having a typical bass and treble circuit and a parametric circuit of mid frequencies. The circuit of the equalizer will take an audio output, and manually boosting or attenuating the amplitude by adjusting the two channels consisting of the bass with 20 HZ to 1 KHz and the treble with 1 KHz to 20 KHz. With 18 dB at 20 KHz, the high frequencies are regulated by R2 while the low frequencies are regulated by R5. At 15 dB, the middle frequency is regulated by R11 while the center of middle frequency at 200 Hz to 6 KHz is regulated by R10.
The level of the bass is controlled below a certain frequency while treble changes are made above a certain frequency. The equalization of mid frequency rises to a maximum at its center frequency which will quickly fall off again to a flat response while passing all frequencies. Nevertheless, the output of the equalizer circuit provides sufficient amplification to a speaker.

Figure 2 

One of the handiest audio tools for videography is the use of the equalizer to eliminate problems in some soundtracks. They can be located in a rack full of audio processors or in an audio mixer. They are used to assist in the elimination of unwanted noise, capture a horrible audio buzz, to control the audio tonal balance, and decrease the tape hiss. This type of equalizer circuit is commonly used in stereo receivers and small audio mixers.

Benarkah 2800 Watt

2800W high power audio amplifier

Mono high power amplifier is actually a powerful 1400 W, but if this hihgh power amplifier circuit is doubled and you want to create stereo, high power amplifier the necessary components and pcb requires two-fold. So if the stereo high power amplifier 2 X 1400W. Schematic Circuit diagram is still less by looking at the circuit that was so below, the finished circuit has been added with a gains using JRC4558 IC by the two and the picture ic where it can be seen below. For circuit buffers, drivers, and booster use multiple transistors and other components (can be seen listed component). And high power amplifier project that is so below is just part of the buffer and driver while the booster has not been made??. For additional transistors in the booster or high power amplifier end scheme can be found Booster output power amplifier. Part List : Resistor R1_____560? R2_____100? R3_____2K2? R4_____560? R5_____1? R6_____27K? R7_____10K? R8_____100? R9_____100? R10____100? R11____12K? R12____100? R13____100? R14____100? R15____27K? R16____2K2? R17____560? R18____100? R19____10K? R20____330? R21____47? 2W R22____56? R23____2K2? R24____22? R25____56? R26____180? R27____500-1K? Trim R28____560? R29____56? R30____56? R31____22? 1W R32____5?6 2W R33____10? R34____180? R35____100? R36____22? 2W R37____180? R38____56? R39____47? 2W R40____5?6 2W R41____10? R42____10? R43____10? R45____10? R46____0.22? 5W R47____0.22? 5W R48____0.22? 5W R49____0.22? 5W R50____10? 5W Capacitor C1_____1?F C2_____1.5nF C3_____0.1?F 250-275V C4_____0.1?F 250-275VC5_____100nF C6_____100?F 50V C7_____39pF C8_____330pF C9_____330pF C10____330pF C11____47nF 250-275V C12____220nF 250-275V Transistor T1_____MJE340 T2_____2N5551 / C2240 T3_____2N5551 / C2240 T4_____2N5551 / C2240 T5_____2N5551 / C2240 T6_____2N5401 / BF423 T7_____2N5401 / BF423 T8_____2N5401 / BF423 T9_____2N5401 / BF423 T10____MJE350 T11____B1186 T12____TIP127 T13____D1763 T14____D1763 T15____B1186 T16____C5198 T17____A1941 T18____2SC2922 / MJ15024G T19____2SC2922 / MJ15024G T20____2SA1216 / MJ15025G T21____2SA1216 / MJ15025G

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