Behringer x32 drivers how to#

The output voltage from the source is developed across the input impedance of the destination (often called the load impedance, or simply the load), and therefore the signal voltage is passed from source to destination. the impedance measured across the inputs). Similarly, any device which expects to receive a voltage input has an input impedance - the impedance 'seen' by any equipment connected to its inputs (ie. Input & Output ImpedancesДЄny device which generates a voltage has what is called an output impedance - the impedance value of its own internal circuitry as 'seen' from the outside (ie. However, the impedance to radio frequency (RF) signals will often be very different to that at audio frequencies in order to keep RF interference out. In audio input and output circuits the impedances are principally resistive to make interconnection easier - the impedance won't change too much over the range of audio frequencies. However, the actual value depends to some degree on the frequency of the signal voltages involved. Impedance has the symbol Z - hence references to high-Z inputs, for example - and is still measured in Ohms. To make life slightly easier for ourselves, we often consider the total 'resistance' of a complex circuit involving resistors, capacitors and inductors as a composite lump, and that's what we call the impedance. In simplistic terms these also act like resistors, except that their resistance to current changes in proportion to the frequency of the signal voltage fluctuations - the rate at which the current flowing through the circuit is made to change direction by the audio signal voltage, in this case.ДЄll audio electronics have combinations of resistors, capacitors and inductors connected in circuits, along with 'active' components like transistors or valves which provide amplification or act as switches. In addition to the simple resistance we have already discussed, there is also capacitance and inductance to consider. This is where things become slightly more complex, because, in addition to the resistance, there are two other fundamental components which affect the current flowing around an AC circuit. The currents that flow therefore have varying amplitudes and alternate in direction as well, and we have what is known generically as an Alternating Current (AC) circuit.

However, when we are dealing with audio electronics, the signal voltage changes amplitude continuously to represent the changing amplitude of the audio signal, and it alternates between positive and negative cycles. This simple example is of a Direct Current (DC) circuit - the battery voltage is steady and unchanging (ignoring the effect of the battery losing energy over time).

So if the battery is 12V and the resistor is 120О©, the current flowing around the circuit will be 12V/120О©, which is 0.1A, or 100mA. Expressing this law algebraically, V=IR, a simple bit of algebraic rearrangement gives I=V/R. This important phenomenon is defined mathematically in Ohm's Law, where the battery voltage (represented by V and measured in Volts) equals the current (represented by I and measured in Amps) multiplied by the resistor's resistance value. In resisting the current, a voltage difference is developed across the resistor. The resistor resists that current - the higher the value of the resistor, the lower the current will be, and vice versa. The battery generates a voltage which tries to force a current around the circuit connected between the battery's two terminals. Imagine a simple circuit consisting of a battery and a resistor. We should first think about electrical resistance (represented by R), measured in Ohms (symbol О©). Okay, let's start with a basic definition of impedance.

So any electronics students reading this can stop right now and go and do their homework instead. In this article I will try to answer these questions and to explain what you need to know about impedance in practical terms, without too much maths and science. Input impedance, output impedance, terminating impedance, matched impedance, and characteristic impedance are all fairly common terms in the tech specs, but what do they all mean and why are they relevant?

Behringer x32 drivers how to#

In this workshop we explain what the recording musician needs to know about impedance, and show you how to avoid lifeless guitar sounds, digital glitches, and fried amps!ДЄnyone who has read the technical specifications of any mixer, preamplifier, microphone, or pretty much any other piece of audio equipment will have come across the term impedance. No home studio is immune from issues of impedance, yet the subject can seem very confusing.