Guddu
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Dear FMs, << Note: Check out Amir's review/measurement post >>
This thread is dedicated to A70 Mono - Aiyima's TPA3255 monoblock amplifier with PFFB, switchable to full range or subwoofer amplifier.
I intend to share my impressions using this amplifier, testing and evaluating features along with observating any gliches/issues if noticed.
*** I hope other A70 Mono owners may also sum up their feedback and some work arounds here to help other potential owners or interested ones ***
Here, I mean to summarize:
> what I get as a buyer or user of Aiyima A70 Mono amplifier
> aspects other than measurements that you might be interested in
> testing features & functions to see if there are any issues and how could get around those, if any
> I also hope that this thread could provide some information as to "what to expect" while you look to buy one for yourself
I bought A70 mono pair on Amazon soon after it became available. and it got delivered on 3rd Oct 2024. I have been using A70 mono pair from day 1 and posting this after about 3 weeks of continuous use.
Look & Feel:
> Amplifier case work is solid & a bit heavier, bigger (than other similar amplifiers) with side vents and decent bottom feet providing some clearance.
> Front panel uses toggle switches for power operation and RCA/XLR input switching, I see it be more stable than other methods used in other amplifiers for these operations.
> Front panel has dual big golden knobs for main volume control and SW-FREQ (low pass filter), it did look a bit unusual in the begining but did not take much time to get used to.
*Note: The powe switch has ON/Auto position - Auto here is TRIGGED IN operation. There is no auto signal sense here.
*Note: Left Knob SW FREQ comes in play when amplifier is set to "SUB" mode using switch on the bottom plate of the amplifier.
> Back panel has enough space and clearance between different connectors because of bigger case, and connectors/binding posts used seem better than others.
> 12v triggered input works fine, tested with Denon AVR as well as Emotiva processor 12v triggered out.
> A switch on the bottom plate is used to switch the amplifier to full range or sub-woofer amplifier.
Power Supply:
> It came with 48v 5a GAN PSU, I guess this one has become standard PSU with Aiyima amplifiers for now.
12v Triggered Input
> worked fine, tested many many times with Denon AVR and Emotiva Processor's triggered out
Idle Power Consumption
> Measured on 20a smart plug
> When Powered ON/AUTO but No audio playing: approx. 6W (A70 mono, one amplfier)
> When toggle set to OFF, no power drawn captured
Amplifier Case Temperature
> Playing amplifiers for long duration, about 80dB average, I never found the amplifier case even warm enough.
> Note that its begining of winter here, and room temp. is around 20 C.
> For me, A70 Mono has better thermal performance than any other amplifier I have had.
Background noise, hiss or pop on Power ON/OFF
> Nothing at all..... Yes, nothing at all
> On full volume, no hiss from speakers..... SILENT
Pop sound on Power ON/OFF
> Nothing at all..... Yes, nothing at all
> I have tested it every possible way - power toggle switch ON/OFF, smaer plug ON/OFF, wall plug ON/OFF... result is always same - NO POP
> This has been a concerning issue for me, specially with Fosi & Topping amplifiers...... can not say about anyone else but it always scared me for my speakers
My Setup, Connectivity and Pairing devices:
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>balanced out>>>> A70 Mono pair >>>> Sierra-LX / ELAC DBR62 Speakers
TV ARC >>>> Denon x3200w Front Pre-Out >>>> RCA >>>> A70 Mono pair >>>> Sierra-LX / ELAC DBR62 Speakers
> LED on the right goes BLUE for RCA and RED for XLR/TRS input
Subjective:
> Clean and powerful sound with excellent stereo separation, absolutely non-fatiguing for me....... like Topping PA7
> My Sierra-LX paired very well with A70 Mono, no shorness of low end punch for these low sensitivity speakers
> I just could not differentiate between Topping PA7 and these A70 mono amplifiers, other than A70 mono cound go louder than Topping PA7
> Overall, full marks performance for me.... no complaints
* While I plan to add on more details later as I observe, capture or measure something that could be useful for someone, I am wrapping it up here with a note that several issues which I was seeing as a user with other similar amplifiers, those seems to have resolved here with A70 Mono.
This thread is dedicated to A70 Mono - Aiyima's TPA3255 monoblock amplifier with PFFB, switchable to full range or subwoofer amplifier.
I intend to share my impressions using this amplifier, testing and evaluating features along with observating any gliches/issues if noticed.
*** I hope other A70 Mono owners may also sum up their feedback and some work arounds here to help other potential owners or interested ones ***
Here, I mean to summarize:
> what I get as a buyer or user of Aiyima A70 Mono amplifier
> aspects other than measurements that you might be interested in
> testing features & functions to see if there are any issues and how could get around those, if any
> I also hope that this thread could provide some information as to "what to expect" while you look to buy one for yourself
I bought A70 mono pair on Amazon soon after it became available. and it got delivered on 3rd Oct 2024. I have been using A70 mono pair from day 1 and posting this after about 3 weeks of continuous use.
Look & Feel:
> Amplifier case work is solid & a bit heavier, bigger (than other similar amplifiers) with side vents and decent bottom feet providing some clearance.
> Front panel uses toggle switches for power operation and RCA/XLR input switching, I see it be more stable than other methods used in other amplifiers for these operations.
> Front panel has dual big golden knobs for main volume control and SW-FREQ (low pass filter), it did look a bit unusual in the begining but did not take much time to get used to.
*Note: The powe switch has ON/Auto position - Auto here is TRIGGED IN operation. There is no auto signal sense here.
*Note: Left Knob SW FREQ comes in play when amplifier is set to "SUB" mode using switch on the bottom plate of the amplifier.
> Back panel has enough space and clearance between different connectors because of bigger case, and connectors/binding posts used seem better than others.
> 12v triggered input works fine, tested with Denon AVR as well as Emotiva processor 12v triggered out.
> A switch on the bottom plate is used to switch the amplifier to full range or sub-woofer amplifier.
Power Supply:
> It came with 48v 5a GAN PSU, I guess this one has become standard PSU with Aiyima amplifiers for now.
12v Triggered Input
> worked fine, tested many many times with Denon AVR and Emotiva Processor's triggered out
Idle Power Consumption
> Measured on 20a smart plug
> When Powered ON/AUTO but No audio playing: approx. 6W (A70 mono, one amplfier)
> When toggle set to OFF, no power drawn captured
Amplifier Case Temperature
> Playing amplifiers for long duration, about 80dB average, I never found the amplifier case even warm enough.
> Note that its begining of winter here, and room temp. is around 20 C.
> For me, A70 Mono has better thermal performance than any other amplifier I have had.
Background noise, hiss or pop on Power ON/OFF
> Nothing at all..... Yes, nothing at all
> On full volume, no hiss from speakers..... SILENT
Pop sound on Power ON/OFF
> Nothing at all..... Yes, nothing at all
> I have tested it every possible way - power toggle switch ON/OFF, smaer plug ON/OFF, wall plug ON/OFF... result is always same - NO POP
> This has been a concerning issue for me, specially with Fosi & Topping amplifiers...... can not say about anyone else but it always scared me for my speakers
My Setup, Connectivity and Pairing devices:
PC & nVidia Shield Pro (source) >>>> Topping E50 >>>>balanced out>>>> A70 Mono pair >>>> Sierra-LX / ELAC DBR62 Speakers
TV ARC >>>> Denon x3200w Front Pre-Out >>>> RCA >>>> A70 Mono pair >>>> Sierra-LX / ELAC DBR62 Speakers
> LED on the right goes BLUE for RCA and RED for XLR/TRS input
Subjective:
> Clean and powerful sound with excellent stereo separation, absolutely non-fatiguing for me....... like Topping PA7
> My Sierra-LX paired very well with A70 Mono, no shorness of low end punch for these low sensitivity speakers
> I just could not differentiate between Topping PA7 and these A70 mono amplifiers, other than A70 mono cound go louder than Topping PA7
> Overall, full marks performance for me.... no complaints
* While I plan to add on more details later as I observe, capture or measure something that could be useful for someone, I am wrapping it up here with a note that several issues which I was seeing as a user with other similar amplifiers, those seems to have resolved here with A70 Mono.
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