AUDIO SIGNAL PATH SERIES

In audio systems, DC sources are used to power audio circuits. This allows high frequency signals such as AC components to pass. On the other hand, a capacitor exhibits low impedance to high frequency components. To low frequency components, such as the DC signals, a capacitor exhibits high impedance, thereby blocking them. In coupling applications, a capacitor blocks low frequency DC signals and allows high frequency AC signals to pass. The reactive nature of a capacitor allows it to respond to different frequencies differently. They find many applications in audio and radio frequency systems. Coupling capacitors are used in analog as well as digital electronic circuits.

AUDIO SIGNAL PATH SERIES

In circuits, a coupling capacitor is connected in series with the signal path. Furthermore, DC signals affect the performance of power amplifiers and increase distortion. In audio systems, DC components affect the quality of the desired signal by introducing noise. These unwanted DC signals come from electronic devices or preceding stages of an electronic circuit. Coupling capacitorsД¬oupling capacitors are used in electronic circuits to pass the desired AC signal and block unwanted DC components. Other properties of a capacitor that can influence the performance of an electronic circuit include temperature characteristics, self-healing properties, aging, and flammability. Key properties to consider when selecting a capacitor for a given application include capacitance value, voltage rating, frequency response characteristics, cost, and physical size. The applications of a capacitor primarily depend on its characteristics. Dirt in = dirt out!In circuits, capacitors are used for a wide range of applications including storing electrical charges, blocking DC components, bypassing AC components, filtering unwanted signals, and so on. If your input signal is not good, you may put an в‚¬1.000.000 amplifierД«ecause in a good amp: input = output. I have a Conrad Johnson pre-amp (the cheapest in the range) which has no electrolytics anywhere, not even in the PSU. eg cheap and small electrolytics in some parts of the circuit. The clever bit is recognising when compromise will least affect the sound quality. Some MUST get their power from else where. a relay to switch the 'speaker delay on start up' and/or the LED to show 'power on' and/or the other ancilliaries that are not between mains and speaker terminals.Д«UT the other components must not modulate the clean DC that is vitally important to the overall sound quality. The exceptions are the components outside these two circuits.Д®g. The amplifier can be thought of as a variable resistor that alternately connects +ve Dc and -ve DC to the speaker terminals.ДЄll the components in these two major parts affect the quality of sound. The PSU tries to provide a clean DC supply with no noise and low source impedance. The speaker gets it's current from the mains.ДЄll the components between the mains and your speaker will to some extent (sometimes inaudible and sometimes unmeasurable) affect the output. Will only be as good as the weakest point 1,2,3 allows, or worse.ДЄ good hifi reproduction REQUIRES ALL of these: If this is not good, it does not matter how good source(1) and power supply(2). Ripple, noise or too weak supply can often give bad resultД®ven if your amplifier circuit is PERFECT with best possible components.ДЈ. Make sure you have clean DC to feed your amp. This is the material used to create an amplified version of the signal. If your input signal is not good, you may put в‚¬1.000.000ДЄnd it will still deliver same quality output signal = not good. Make sure you have good quality sound source before amp. Make sure you have a good lens of high quality and keep it clean.ДЎ. Do not have any dirt or scratches on the negative!Дў. The copier machine is = the amplifier, to enlarge, amplify.ДЎ. I usually compare an amplifier, with making a BIGGER PAPER Photo form a small (24x36mm) negative. If you have not clean supply and may not help how good parts in signal part.

Best is if all components, signal path and supply, are of high quality.

Audio signal path