![]() ![]() The difference is that the power amplifiers are passing audio signals (not DC) and that they are wired to a utility power source (so they don’t get depleted over time like a battery).Ī two-channel amplifier configured for bridged-mono can swing twice the voltage than either channel individually, at the same current as one channel. Let’s substitute power amplifiers for batteries. ![]() Which configuration is best? It depends on other factors. So, having two batteries allows me to get more voltage, or more current, than can be supplied by a single battery. There are now a number of multi-channel amplifiers in the professional audio marketplace that support series-parallel connection. That’s a common practice for batteries but not for audio power amplifiers. If you need more voltage and more current, you can connect 4 power sources in series-parallel. The actual current flow depends on the load impedance, but the available current is equivalent to that of both of the sources combined.įig. Twice the available current, same voltage – remember that. 2), the source voltage remains unchanged (1.5 VDC) but the available source current doubles to 4000 mA continuous. If I connect the batteries in parallel (Fig. ![]() The current flow depends on the load impedance, but the available current is equivalent to that of one of the batteries.įig. Twice the voltage, same current – remember that. The current remains the same as for the single battery. 1), the output voltages add, so I now have a 3 VDC supply. If I have two AA batteries, I can connect them in series or in parallel. Let’s not worry about for how long, which is mAh. BatteriesĪ single AA battery is 1.5 VDC, and can source about 2000 mA continuous. Let’s cover the basics with a simple example of connecting multiple power sources. These potentially useful configurations are often misunderstood and mis-used. Since we call a two-channel amplifier “stereo,” configuring the channels to combine their outputs into a single load is referred to as “mono.” There are two possibilities – bridged-mono and parallel-mono. So, “What’s the carrot?” “Mono” Configurations But, having two amplifier channels in the same box can provide some other benefits. Even though this is the most popular form factor for professional amplifiers, the majority of sound reinforcement systems aren’t stereo. Two audio channels, two loudspeakers, two amplifiers, two ears – it seems logical. Why two amplifier channels? It’s most likely due to the popularity of stereo playback systems since the early days of hi-fi. Updated March 2020 The most popular form factor for audio power amplifiers is two-channel or “stereo.” Pat Brown answers this question, “Why two amplifier channels?” ![]()
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