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With a good power amplifier the load impedance only affects the maximum power output. ![]() As with a power amplifier and speakers the impedance to a device determines the performance. That is why a good DI-box is distinguishable from a bad one. Impedance is the electrical frequency dependent resistance of a device combined with its phase response. That is the application of a Direct Injection box. But that’s not all, there are lots of situations where you want to inject the signal coming from an unbalanced source directly into your mixer and preferably balanced, too. Low frequencies (such as from a bass guitar) are especially difficult for a microphone to handle.Ī DI-box makes it possible to tap a signal from a high impedance unbalanced line, for instance the signal from a guitar to a guitar amplifier, and Inject it Directly into the mixer’s input without having to use a microphone. A microphone picks up ambient noise such as other instruments. Guitars cannot be directly plugged into a mixer and placing a microphone in front of a backline is not always ideal. ![]() Keyboards seldom have properly balanced outputs. On stage or in the studio there are sources you want to connect to your mixer that are not equipped with a suitable connection. Thank you very much for expressing your confidence in BEHRINGER products by purchasing the ULTRA-DI.ĭI stands for Direct Injection.
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