The chip on the bottom right is most likely the CPU that provides the intelligence for the amplifier.
The chip on the bottom right is most likely the CPU that provides the intelligence for the amplifier.
Is this amp then better than getting two Fosi Audio Mono V3s?
I'm slightly following on from your answer here, and a couple of questioners about the V3 Monos...Simply put, an A7 Mono is exactly half an A7 with its own power supply.
A7 has 2 pieces of TPA3255, one per channel as PBTL, the A7 Mono has a TPA3255 as PBTL.
The advantage of completely mono is no crosstalk, no mutual interference and its own power supply.
And of course you can place it directly next to your speakers.
And my question also slightly relates here too : better? Why have an extra op amp? Fewer for me would = better!Define "better".![]()
I'm also surprised, because the V3 Mono has 3 operational amplifiersI'm slightly following on from your answer here, and a couple of questioners about the V3 Monos...
A 'half A7' would have one op amp (for output) in each unit. Audiophonics have an image which bears this out - just checked and pasted below.
I have always wondered about the two op amps Fosi use in each of the V3 Monos ...
And my question also slightly relates here too : better? Why have an extra op amp? Fewer for me would = better!
Does anyone have any thoughts on this?
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And Fosi claim you could/should replace any number of them.I'm also surprised, because the V3 Mono has 3 operational amplifiers.
That's why I've been asking. It's easy to see that the 3e Audio A5 performs technically better in all measurements performed by Amir and @Archimago. But a set of V3 Monos provides higher max. power, of course. They also have the "always on" switch some are missing on the A5/A7. The binding posts on the A5/A7 are of much higher quality, as is the casework in general (if not as fancy looking as the Fosi).And better is always relative, it's just different.
The op amps in positions 2 and 3 are responsible for adjusting the tone.
Yes okI'm also surprised, because the V3 Mono has 3 operational amplifiers. They probably just copied the circuit from the normal V3 and the NE5532 is really cheap in quantities.
The A7 Mono has 2 dual operational amplifiers, which is at least necessary (SE and balanced input).
And better is always relative, it's just different.
Yes - sell more op amps.And Fosi claim you could/should replace any number of them.
PS:
Fosi provides an FAQ document explaining what the three op amps are supposed to do:
Unfortunately, the explanation for OP1 and OP2 doesn't make any sense.
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The op amps in positions 2 and 3 are responsible for adjusting the tone.
I don't see an (replaceable) op amp towards the output, though. That would make no sense. The one closest to the output is just the single-ended to balanced converter (similar to what's found on the A5/A7).But I'm still curious about the 'extra' ones in the Fosi before the output.
I think it's my language sorry.I don't see an (replaceable) op amp towards the output, though. That would make no sense. The one closest to the output is just the single-ended to balanced converter (similar to what's found on the A5/A7).
Objectively better in all the relevant measures in regards to an ideal amplifier: provably inaudible distortion, no load dependency, etc.Define "better".![]()
Easy then, Amir tested both, the 3e Audio A5 and the V3 Mono. Just look at both reviews and compare.Objectively better in all the relevant measures in regards to an ideal amplifier: provably inaudible distortion, no load dependency, etc.
just found your take a few comments above haha, thanks!Easy then, Amir tested both, the 3e Audio A5 and the V3 Mono. Just look at both reviews and compare.
I had already given my interpretation of the data.
Thank you for the heads up .... from Archimago's review and the comments here I gained the impression that the A7 was available only in mono.???
This already exists, please take a look at 3E Audio A7 and A7se.
I can't imagine trying to drive my F208's w/ the PA5-or this amp if I had it. Never hooked it up to them, knowing it wouldn't be able to drive them to adequate loudness levels (that I listen to).That would hardly qualify "continuous" power. I don't remember @amirm talking about this test in more detail but I think @Archimago mentioned that his power test lasts like 30 seconds or so. That's too long to be fed from the buffet capacitors.
That's all true, of course, but totally not the point here.And it's not just the change with frequency. We could go on and discuss at length how many amplifiers struggle to keep their output voltage into reactive loads (not the 3e Audio A5, which does remarkably well in this area). And we could talk about how and if EPDR is able to provide a better metric for compatibility.
But in this case the question was simply if the A5 could drive a certain speaker (Revel Performa3 F208) marketed as being nominally 8 ohm with a sensitivity of 88.5 dB. Truth is, that this is clearly not an 8 ohm speaker so its sensitivity should be stated at 2.0 V, Not at 2.83 V, which would make it look less attractive at 85.5 dB.
Revel Performa3 F208 loudspeaker Measurements
Sidebar 3: Measurements I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the Revel Performa3 F208's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield responses. The F208 is a large, bulky speaker, so it wasn't possible for me to raise it...www.stereophile.com
The next question is, if the A5 (PBTL, stable down to 2 ohm loads) or the A7s (BTL, stable.down to 4 ohm) was the better suited amp.
Personally, I'd.probably.still.pick the A5 or the A7, not the A7se. But we don't have any independent measurements if the A7se (or A5se for that matter) yet.
You know beforehand? Out of godly wisdom?Never hooked it up to them, knowing it wouldn't be able to drive them to adequate loudness levels (I listen to).
The Purifis drive them well. Should I hook the PA5 up and let it strain? Nah. No point.You know beforehand? Out of godly wisdom?
What about the A7? Or A7 Mono?
Worth measuring the power consumption on your existing amplifier with a simple smart plug or wattage meter. You might be totally right but why guessing and posting without facts!I can't imagine trying to drive my F208's w/ the PA5-or this amp if I had it. Never hooked it up to them, knowing it wouldn't be able to drive them to adequate loudness levels (that I listen to).
Power consumption? I'm talking about power production. I guess I will have to hook the little bugger up and see if it produces smoke to make u guys happy.Worth measuring the power consumption on your existing amplifier with a simple smart plug or wattage meter. You might be totally right but why guessing and posting without facts!
Why are you posting off topic to this thread at all? Just to show that you own a PA5 and a Purifi amp and just because of that you know how inappropriate the A5 is in your environment?Power consumption? I'm talking about power production. I guess I will have to hook the little bugger up and see if it produces smoke to make u guys happy.