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Originally Posted by UKenGB
Ah, but does it really scan the I-Bus, or is it simply designed to automatically supply the correct output for either high or low impedence (i.e. amp or speakers)?
This is relevent as in my situation (no amp) the radio powers the speakers directly, but if it is connected to an amp instead, does the level drop to what could be called line level (ok, with a 5V bias) or will it still be trying to drive speakers, which will surely fry an amp with line level only inputs?
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Yes, it really scans the IBus. When attached to a DSP amp the radio puts out a constant volume signal. You must reset the entire audio system to change it to variable outputs.
Electrical outputs are designed to handle a maximum amperage / minimum impedance. For the most part, systems can easily handle lower amp/higher impedance circuits. In this case, a system designed for speakers (high amp/low impedance) will easily drive an amp (low amp/high impendance). There is no concern of the system
accidentally sending a high amperage signal to the amplifier because the amplifier determines what it receives. In other words, because the amp is high impedance, it will receive a low amperage signal.
The long and short of it is that you need only concern yourself with whether the amplifier can handle a
10V input signal (balanced 5V signal is 2x5V = 10V total peak). If it can, then don't worry about it.
Doug