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In Reply to: Emotiva dose of LIRPA ;) posted by E-Stat on April 1, 2021 at 11:00:24:
The reasons for using a SMPS as listed in the Emotiva video include:
- More power
- Quieter
- Less Noise
- Better performance and efficiency
What wasn't mentioned is the much lower cost of a SMPS and mandates for higher energy efficiency for products sold in some countries. I'm sure these are big drivers for moving to SMPS as well.
Benchmark ABH2 does SMPS too:
"Resonant Switch-Mode Power Supply - Most high-end power amplifiers use unregulated linear power supplies. The conventional wisdom is that linear supplies are electrically quieter than switching supplies. Benchmark's research shows that this is a myth. Linear supplies have transformers that operate at the AC mains frequency. The problem with these 50 to 60 Hz transformers is that they must be very large in order to supply the required power. These large low-frequency transformers generate large stray magnetic fields that can interfere with other nearby devices, and with the amplifier itself. The noise performance of many traditional power amplifiers is limited by the amplitude of the AC line-related hum. This hum is often magnetically induced and is very hard to eliminate. To solve these problems, Benchmark now uses switching power supplies in all of its newer products. Switching frequencies are set well above the audio band. More importantly, the high switching frequency greatly reduces the size of the magnetic components and the magnitude of the stray magnetic fields. Resonant switching is used in the AHB2 to minimize switching noise. Resonant supplies switch at low voltage and low current and are much quieter than traditional switching supplies."
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Follow Ups
- Makes sense. Benchmark does SMPS too in the ABH2 amp - AbeCollins 14:37:11 04/01/21 (3)
- Pretty much the same message as Emotiva - Feanor 09:11:30 04/02/21 (0)
- You didn't watch it in time ;) - E-Stat 15:21:42 04/01/21 (1)
- RE: You didn't watch it in time ;) - AbeCollins 18:57:59 04/01/21 (0)
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