@mike_in_nc,Apollon seems to be a great choice for PuriFi based amps. What was the amp it replaced? Any comparison that you can share?
High end Class D amps?
Just an observation and a question. Are there 'high end' Class D amps out there that are just as good as Class A, A/B amps? I realize that's a sensitive question to some and I mean no disrespect---but whenever I see others' hifi systems on social media, all of the amps are A or A/B. There's always Pass, McIntosh, Moon, Luxman, Accuphase, etc. Where are the Class Ds? For folks out there that want more power for less efficient speakers and can't afford the uber expensive Class As, A/Bs, what is there to choose from that's close to those brands? Thanks
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@milpai - The Apollons haven't replaced my other amp yet; I'm still deciding. They and the Bryston 4B3 are really nice amps, so it's not simple. Their gains are different, and since I have subs in the system, it's not trivial to swap one in and the other out while keeping levels constant. Indeed, it's proven to be more fiddling and fussing than I'm up for. The experience gives me appreciation of what audio reviewers deal with. That said, things I notice about the Apollon amps are
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@mike_in_nc ,Thank You for the prompt response. Based on what you mentioned, I think you are listening "louder" to the Apollons, (maybe) because they are so clean?! I think that is indeed good.Are the Apollons warm/cool compared to the Bryston? One point I read with great interest was the "electrostatic main speakers". What speakers are those? Class D in general are accused of not being able to handle 2 ohm loads. Does your speaker dip to that level? If it was me, I do not care for numbers. If the amp is able to drive the speakers my speakers to level I like, I am happy.BTW your feedback is VERY helpful. |
@milpai - You’re welcome. The "cubed" Brystons run cool, and the Apollons run very cool. I haven’t noticed a huge difference, though the Apollons probably generate less waste heat. My speakers are a pair of Janszen Valentina P8. Janszen rates them at 6 ohms nominal, 4 ohms minimum. I would imagine that, like other electrostats, they offer a highly capacitive load. I think the comment that Class D can’t handle low impedance speakers is audiophile truthiness -- it doesn’t reflect today’s technology. Look at the specs of the PuriFi modules, which can put out 500 watts into 2 ohms with 0.0003% THD. |
Look at the specs of the PuriFi modules, which can put out 500 watts into 2 ohms with 0.0003% THD.Look at what independent tested current it can do. Compare the "2ohm wattage" to the "4ohm wattage", and see if the 2ohm can come "close" to doubling the 4ohm, if so there’s no current limiting. If it’s similar or lower, then there is severe current limiting/sagging. Cheers George |
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