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I'm totally ingnorant about the buffers and OP amp options for Purfi amplifiers. How does a consumer shopping for a Purfi Amp know the differences and/or how to make the best selection/combination? Is there sombody testing the combinations or describing their functions and sonic...

What are the Pros and Cons of the different power supplies to these modules? I don't understand the real world performance differences and would like to start the discussion. I have read that toroidal will increase the module output and provide higher continuous power. I have also read that...

Has anyone bought or heard the VTV Purfi (3 channel) + Hypex (2 channel) Amp? It has my interest, the price is right, but I'm cautious of build quality and performance. Thoughts? Thanks

Which would you choose and why? I've read the reviews and threads on both ad nauseam. I plan on running with an Emotive XP-5 amp. Other than price, front HDMI port and Aural upmix on the 4700, what spec' differences am I missing? Would one have any sonic/spec' advantages over the other...

Who makes a recommended multi-channel amps with 150-180 wpc? I will most likely want a 5 channel to power a Denon AVR. Thanks

Guidance please. Questions about running a Denon 3700h with power amp. Can I use a 3 channel amp and still use the AVR to control the subs and drive the surrounds? ...or do I need a 5 channel amp to power all the speakers in my surround system? Separate amp/s seem like a good way to go with AVRs...