Seems these guys are “fusers”. Some of the rationale makes sense IMO.
https://www.stereophile.com/content/hifi-tuning-fuses
https://www.stereophile.com/content/hifi-tuning-fuses
Purifi Class D: Junk?
So, from the previous thread about high-end class D the Purifi module was brought up. I decided to get a cheap example from VTV, a simple stereo unit with a single Purifi module and matching Hypex SMPS. Standard input buffer. I got it in yesterday. First impression wasn't what I was expecting: weak, congested dynamics is what stood out to me. I expected greater expression through my ProAc D30Rs. The other problems such as poor soundstage, thin / boring character, etc, I marked up to needing burn-in before evaluating. So it's been 24 hours, I would still expect to get at least the high control / damping of high end class D and dynamic power, but it's just not present.
Could it be an impedance mismatch? Other manufacturers selling the Purifi with their custom input buffers are reporting 47k Ohms. VTV doesn't say in the manual or on the site. I checked the Purifi data sheet which reports...2.2k Ohms on SE???? That can't be right?? That's absurdly low! Am I reading the right spec? My preamp has an output impedance of 230 Ohms. Can someone confirm that the stock Purifi has this ultra-low input impedance?
Could it be an impedance mismatch? Other manufacturers selling the Purifi with their custom input buffers are reporting 47k Ohms. VTV doesn't say in the manual or on the site. I checked the Purifi data sheet which reports...2.2k Ohms on SE???? That can't be right?? That's absurdly low! Am I reading the right spec? My preamp has an output impedance of 230 Ohms. Can someone confirm that the stock Purifi has this ultra-low input impedance?
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Once again on fuses for the gullible here that are thinking of throwing their money away paying $150+ for a 50cent fuse that’s just been dressed up to look glitzier. You’ll never see the manufacturers of these (snake oil) fuses defending themselves or their products with the claims made on forums like these. Just change the fuse if old fuse for a quality brand EE industry standard 50c fuse, as all fuses (even the snake oil ones) do age and still work but develop corrosion, sag and distort etc after too many turn on cycle surges. Cheers George |
You are making people wrong by telling the world that they are gullible. Why would you put someone down for their EXPERIENCE? I may not agree with what everyone says but I practically never doubt what they say about what they hear. They could of had expectation bias or maybe had a cold that day but 95% of the time they actually heard what they say. I have done tons of A/Bs with multiple people in the room and NEVER did anyone hear something different. Back in the late 70s three humans, including me, A/Bed 10 brand new Supex cartridges......We all heard the differences and one of them was the best......The frequency response graphs that came with each cartridge showed no correlation to the sonics. I trust what George (and everyone) says about what he/they actually hears.....I do not trust what he/they says about things that he/they has not heard......why would anyone? Trust your experience.....trust others experience...do not trust opinions based on non experience. Please, love yourself and everyone. Allow everyone to have their own experience without putting them down. |
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