16 x 200W != 3200W About Streaming Amplifier
Too many people have misunderstood about total power and simultaneous total power. Take a 16-channel amplifier, if the peak or RMS power of every channel is 200W, people prefer to compare 16x 200W =3200W vs. Power Input capability.
It is wrong.
Because the possibility that all 16 channels simultaneous reach peak or RMS power is almost never happened.
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Think of it as 16 × 200 W. Because audio is a waveform, the probability that every channel will simultaneously hit its maximum is extremely low, so the total rarely approaches 1,500 W. Nevertheless, each individual channel can still deliver the full 200 W. For reference, look at Dolby’s cinema-grade multi-channel amplifier, the DMA-32300, which is 32x 200
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Thank you
Lidiya wang
OpenAudio
Dear Jerry,
Thank you for your email.
I wanted to bring to your attention some important details regarding the Dolby DMA information that might affect your review.
Dolby Multichannel Amplifier Specifications
Specifically, the input power for the Dolby DMA is rated at 100 to 240 VAC, 20AMP. For the output power, the DMA32300 model has the following specifications:
- DMA24300 (24 channels) and DMA32300 (32 channels):300 W per channel at 8 ohms, 4 ohms, and 600 W in two-channel bridge mode at 8 ohms.
When you compare the power output vs. input power, it looks like this:
- 32 channels x 600W @ 4 ohms vs. 100 VAC x 20A
- 19,200W vs. 2,000W = 9.6:1
When we mention that the product supports “2x 150W @ 8 ohms or 2x 300W @ 4 ohms,” we’re referring to the Amplifier itself. For customers who need higher power output, they have the option to upgrade the power supply. The power supply we include is a 32V 5A unit. However, you can enhance the performance by using a higher voltage or current, such as a 48V 5A supply.
It’s important to note that you can’t simply calculate the input and output in a straightforward manner. For example, Dobly has an amplifier called the DMA32300, which features 32 channels with each channel delivering 300W, totaling 9600W. Yet, its input is only 220V 10A, because not all channels operate at maximum power simultaneously. Based on our experience, as long as the power supply input is about 1/5 of the maximum total power, it should suffice.
Best regards,
OpenAudio
