3e Audio A7 [TPA3255 PFFB Stereo] Finished Amplifier - User Impressions | Owner's Thread

[antcollinet]

I don't get it. If there is no improvement to the sound (and there isn't)....

It's purpose is simply the joy it brings to the participant.

Where does the joy come from?

 

[Guddu]

Amir’s measurements:
Thread '3e audio A7/A7 Mono Amplifier Review'
https://audiosciencereview.com/forum/index.php?threads/3e-audio-a7-a7-mono-amplifier-review.62176/

Thanks @amirm

 

[Guddu]

@3eaudio
Just curious why did you decide to send 52v 9a PSU with A7 to review, rather than what a customer is going to get i.e., 48v 5a or 48v 10a !!!

 

[3eaudio]

@3eaudio
Just curious why did you decide to send 52v 9a PSU with A7 to review, rather than what a customer is going to get i.e., 48v 5a or 48v 10a !!!

A7Mono can run with highest power at 52V, sending both 48V/52V two power supply increase a certain ship cost so we only send him 52V for cover A7 and A7Mono config test.
with 48V/10A the performance is the same except output power lower around 20W at 1%THD.
btw,52V is a customize voltage and supplier do need a certain quantity for MOQ,we didn't have confidence how the marketing will be at begining so we decide to combine 48V/5A and 48V/10A(seperated) same as A7.
in the next integrated(SMPS) amp will re-use this 52V one with PCB redesign and other optimized

 

[Guddu]

A7Mono can run with highest power at 52V, sending both 48V/52V two power supply increase a certain ship cost so we only send him 52V for cover A7 and A7Mono config test.
with 48V/10A the performance is the same except output power lower around 20W at 1%THD.
btw,52V is a customize voltage and supplier do need a certain quantity for MOQ,we didn't have confidence how the marketing will be at begining so we decide to combine 48V/5A and 48V/10A(seperated) same as A7.
in the next integrated(SMPS) amp will re-use this 52V one with PCB redesign and other optimized

Personally I have no complaints whatsoever with 48v 10a.
I still can’t get over thinking the kind of success A5/A7 could have achieved if released before or around same timeframe as Toppings similar offerings. Nevertheless, hope people realize the engineering efforts and support this project.

 

[Guddu]

in the next integrated(SMPS) amp will re-use this 52V one with PCB redesign and other optimized

Exciting news….. pls do share more information whenever you think it’s appropriate.
I have recently teated an amplifier (TPA3255) with internal PSU, keeps things a bit tidy and feels a bit safer as well.

 

[Jimster480]

Looks really interesting and around the same price as the Fosi V3, but this amp isn't in the USA at the moment it seems. Only ships from Aliexpress?
Are there any plans to bring it to the USA?

 

[3eaudio]

Exciting news….. pls do share more information whenever you think it’s appropriate.
I have recently teated an amplifier (TPA3255) with internal PSU, keeps things a bit tidy and feels a bit safer as well.

we may only focus on pure amp this year and combo amp next year if every going well.

 

[3eaudio]

Looks really interesting and around the same price as the Fosi V3, but this amp isn't in the USA at the moment it seems. Only ships from Aliexpress?
Are there any plans to bring it to the USA?

trying to setup Amazon store in coming may....tariff is challange recentlly

 

[Jimster480]

trying to setup Amazon store in coming may....tariff is challange recentlly

Thanks for the information.
I'd be very interested in getting my hands off out of these. Do you plan to make a dual mono configuration for sale?

 

[antcollinet]

Thanks for the information.
I'd be very interested in getting my hands off out of these. Do you plan to make a dual mono configuration for sale?

The A7 stereo is a dual mono design (except for shared power supply)

 

[Jimster480]

The A7 stereo is a dual mono design (except for shared power supply)

Ah so the mono version only exists for a subwoofer or center channel.

 

[Alannn]

Ah so the mono version only exists for a subwoofer or center channel.

Right. But some will use A7 stereo version for subwoofer  and center channel.

 

[antcollinet]

Ah so the mono version only exists for a subwoofer or center channel.

Or for someone who wants fully separated mono amps.

 

[harkpabst]

Ah so the mono version only exists for a subwoofer or center channel.

And some do use a pair of 3e Audio A7 Mono as just that, a pair of monoblocks with totally separated power supplies.

One use case is placing each amp in close proximity to the speaker it's driving, using very short speaker leads.

 

[antcollinet]

...

One use case is placing each amp in close proximity to the speaker it's driving, using very short speaker leads.

Which is not the best thing to do if it results in longer unbalanced analogue interconnect.

 

[harkpabst]

Which is not the best thing to do if it results in longer unbalanced analogue interconnect.

So better use the balanced input, indeed. But finally,.it all depends.

Personally, I don't mind much as I don't use mono amplifiers anyway.

 

[Jimster480]

And some do use a pair of 3e Audio A7 Mono as just that, a pair of monoblocks with totally separated power supplies.

One use case is placing each amp in close proximity to the speaker it's driving, using very short speaker leads.

Does that really matter? I suppose if your speaker leads are very long then... maybe it could have an effect

 

[harkpabst]

Does that really matter? I suppose if your speaker leads are very long then... maybe it could have an effect

I do not judge, I'm just reporting.

 

[NDA357]

Порекомендуйте хороший кабель trs-xlr с aliexpress