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Well, nothing dims, and I calculated the draw and it seems to be OK.
All the amp channels are being loaded at 4 ohms, and so the amps all pull far less than their max current draw.
In a 1-series, I would worry a bit more, as the battery is smaller and I suspect the alternator isn't as beefy.
But with a system this extensive, you are running a risk on that score, since we are all at the mercy of the service department looking at the car. Most of what I do for customers comprises a single 4 or 6-channel amp and I think the risk is minimal. But I really wanted to try something different this time.
If you were really concerned about current draw, you could use an external processor such as a bitone or a DSP-6, and then use Class D amps instead of Class AB amps, which are much more efficient and thus draw much less current per watt of ouput. IMO, some sound better than others. I'm testing some out now...
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