Stereo Graphic Equalizers | Electronic Project Circuits

Posts Tagged ‘stereo graphic equalizers’

5 channel graphic equalizer by BC548 transistor

The graphic equalizer circuit the frequency adjust circuit. For some kinds of audio frequency response is not smooth. The frequency offset by the tone controls, may not work well. Because the bandwidth is too wide. , Requiring the use of e-equalizer circuit with a narrow bandwidth and is divided into frequency bands increased to 5 channels or more can be broken down to specific actions required frequency bands have to be more specific.

The equalizer circuit can adjust the frequency to 5 channel is 60 Hz, 100 Hz, 1 kHz, 3 kHz and 12 kHz. When entering input signal to signal coupling d through C1 to the position pin 1 of VR1-VR5. If the VR to adjust the position of a signal pin will go to where the second pin of the VR is going through a lot this signal high-frequency filter – a low of each channel. The frequency of each channel is determined by the R1-R8, and C2-C9. And then the signal will pass filter for each channel will be combined coupling d through C10 to expand with the Q1 and Q2. Which Commonwealth model for circuit E Foster limit expansion of output pins of Q2 via C13 C into the output signal. Signals and the other part is fed back via R12 to enter a location pins 3 of the VR1-VR5 and adjusting VR through this terminal signal input to the phase opposite and will cancel the input signal at that point. This is the Cut.
Implementation is very simple. Just pre intermediate tone with the power amp. If the system is used in stereo, then build up to another set.

Be the first to comment - What do you think? Posted by admin - December 5, 2010 at 11:47 pm

Categories: Tone control Tags: Graphic equalizer, stereo graphic equalizers, transistor equalizer circuit

10 Channel Graphic Equalizer by LA3600

In addition to using the LA3600 IC, was the 5 channel graphic equalizer. We can also be designed was the 10 Channel Graphic equalizer circuit. By connection with the other IC LA3600. In the Figure is 10 channel equalizer circuit, which we have designed for the Q = 4. And uses the center frequency of the IC is interruption. Reason The first circuit be work at odd channels, including channels 1,3,5,7,9. As for second IC be doing in dual channel namely 2,4,6,8,10 channel. The strong point of this circuit be will reduce the interference between adjusting the volume the center frequencies similar is rise efficiency of the circuit And the sound quality is better than a general.

10 Channels Graphic Equalizer circuit by LA3600 IC
Construction
We assemble the components on the PCB properly and check soldering points must be tightly all points. Then we solder to the both PCB circuit are the volume and the equipment of IC join together successfully, as shown. When finished, we supply positive 12V circuit to be used immediately, without any adjustment.

The PCB of this circuit

Be the first to comment - What do you think? Posted by admin - June 10, 2007 at 2:28 am

Categories: Tone control Tags: LA3600, stereo graphic equalizers

5 Channels Graphic Equalizer by LA3600

This circuit 5 Channels 2 Octave Graphic Equaliser,easy to make equalizer,
because using IC LA3600 (easy to use)
For you who take an interest sound of music side may nobody strange Graphic Equalizer circuit , but , in you who are a novice , something will build this some group circuit gets into trouble moderately difficult , today I [ hair ] begs for to advise 5 Channels Graphic Equalizer circuit because it uses the integrated circuit LA3600. Be pillar equipment with the convenience that use IC LA3600 just one only. As a result can decorate the sound of music has every fully frequency sound section already. You who are a novice and love the saving may don’t miss group this circuit.
Cut at frequencies of 50Hz, 200HZ,800Hz,3.2kHz and 10kHz.
Supply voltage may be anything from +12V.
Besides I still lead model PCB keep can give testimony try build convenient increasingly.