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The Apollon website claims they are using the Hypex A400 so their (short burst) power specs should be very comparable to the Boxem unit in this review. There may be some error tolerance, but not so much as to get them to the advertised ones. They are clearly claiming the ones at the higher rail voltages and the A400 does not get them there. See @KMO earlier post in this thread for reference.
Yeah, I'm assuming Apollon just put up the module power ratings - I don't see how they'd be achieving them in their assembly.
The pages are inconsistent - the PET950 monoblock says it's using the A700, while the stereo says it's using the A400.
The A700 wouldn't work at all, and the A400 won't give those power numbers. (If it was that easy to get those power numbers we wouldn't be having this discussion).
Yeah, I'm assuming Apollon just put up the module power ratings - I don't see how they'd be achieving them in their assembly.
The pages are inconsistent - the PET950 monoblock says it's using the A700, while the stereo says it's using the A400.
The A700 wouldn't work at all, and the A400 won't give those power numbers. (If it was that easy to get those power numbers we wouldn't be having this discussion).
Yes, I saw their stereo amp page. Anyway it is 2 mistakes, one in the A700 model in the stereo version, second by stating the full module power using A400.
Who voted not terrible?
This is the top 10 best performing (in terms of SINAD) amplifier that we have measurements for...not to mention 4th best reviewed by Amir so far.
Well, since you are the voice of the consumer, you should be happy to see that the measured performance here is consistent with the one published on our site.
NAD are complying with FTC continuous specification requirements. NAD have to sell completed products in many markets and cannot afford to have compliance issues.
Purifi can advertise whatever BS numbers they like, true or not, as they don't sell complete, consumer purchasable products in any market, as far as I am aware. They can pass the buck to the assemblers, the OEMs etc. and get way with it.
None of that detracts from Boxem's implementation. It is one of the best, if not the best.
NAD has added a gain stage to increase its headroom so that it works better with the DSP circuits of its room-correction software and tone controls. NAD concedes that this slightly decreases the M33’s signal/noise ratio, but with careful design and premium parts, and because the Eigentakt’s S/N is so low to begin with, the noise is still inaudible.
Source: soundstagehifi.com
You cannot compare a optimized ready-made chain with a power amplifier
With all due respect, this is BS. They advertise the numbers of their modules which are absolutely correct. It is obvious that a device with more circuitry before and around the module will perform differently. The fact that some boutique manufacturers pass along the Purifi numbers as measurements for the completed product is BS, but not Purifi’s.
With all due respect, this is BS. They advertise the numbers of their modules which are absolutely correct. It is obvious that a device with more circuitry before and around the module will perform differently. The fact that some boutique manufacturers pass along the Purifi numbers as measurements for the completed product is BS, but not Purifi’s.
It's a bloody power amp,power is it's most significant parameter,mount it on a heatsink with Rth = 0.8 K/W which is common and give me NUMBERS for continuous,I can do the calcs then and find out if it suits me.
It's a bloody power amp,power is it's most significant parameter,mount it on a heatsink with Rth = 0.8 K/W which is common and give me NUMBERS for continuous,I can do the calcs then and find out if it suits me.
A lot of the implementations (based on photos) merely bolt the board to the case... and don't bother with real heatsinks.
Which, of course, means they will never achieve much in continuous terms! I would love to see more (any?) of these mounted in traditional heatsink cases... - perhaps one side for the amp board, and the other for the power supply... - then we might start to see meaningful 2ohm figures...
I would love to see more (any?) of these mounted in traditional heatsink cases... - perhaps one side for the amp board, and the other for the power supply... - then we might start to see meaningful 2ohm figures...
Since the end of the year comes, it is time for self inspection...
Q: What is the stupidest thing you did in 2022?
A: As a normal human, I was an idiot 24/24 7/7, but asking and reminding Amir to measure the power in 2 Ohm clearly stands out. Accelerating before passing a speed camera instead of after comes second at a long distance
A lot of the implementations (based on photos) merely bolt the board to the case... and don't bother with real heatsinks.
Which, of course, means they will never achieve much in continuous terms! I would love to see more (any?) of these mounted in traditional heatsink cases... - perhaps one side for the amp board, and the other for the power supply... - then we might start to see meaningful 2ohm figures...
If I wanted to buy one I would buy one with heatsinks. However up to 10-20W continuous the plate affixed to the chassis is fine. I consider it a perfectly linear power amp up to those power levels and with a significant headroom for transients and short bursts. If you need 400W continuous from a 400W amp, you are either listening to crappy noise or your amp is seriously underpowered because you have no headroom, hence no dynamics, and when the music has a transient the amp turns off or something bad happens. That’s why there are 3KW amps.
So. the 1ET400A bolted to the chassis is absolutely fine.
Of course it is,measurements show that in detail.
But it would be nice to have a guide like Ice Power does for example giving the exact test conditions.
I will never claim that even the 300a2 is a better amp,is just nice to have some data to guide you.
Longevity of the electronics is important to someone like me who is still using “old” technology that just keeps working after almost two decades. The casework on what I have is all lovely aesthetics, but I’d happily compact the components and hide them away. I’ll replace when what I have starts to fail. It’s wonderful that I’ll be able to replace with cheaper, that measures better, and consumes less power. Longevity will still be a concern to someone like me who places a high value on sustainability, ie, what I have is good enough if optimised and knowing the limits of my ageing hearing!
