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Aiyima’s TPA3255 PFFB based amplifier, coming soon

SonicSleuth

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See conceptually better. Imo..
 
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xschop

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Yes all good things, thanks for keeping us informed! nice to have the option of RCA / XLR unlike my current DIY TPA3255.

Hope the sub out is controlled by volume with some kind of filter.

They need to do away with the dated and frankly cheap fonts and graphics near the volume knob, everyone knows how to use a volume knob, it gets louder when you turn up and quieter when you turn it down. Some subtile dots, beginning center and end would be fine. They GOTTA up their game, looks matter! Why make a product LOOK cheap when you can make it look premium, with nothing more than a little thought?

An example, simple design, modern fonts, no fluff.

View attachment 346806

Looks to have some kind of rotary knob on the rear too, balance? I have channel imbalance I have to alter it on my WiiM Pro 0.35 to the left to get centered image.
Wholeheartedly agree. Can't wait to drop it into another custom all-billet case.
I swapped out the factory op-amps for LM4562's
More detail and separation of vocals/instruments with these little jewels...Is there a break-in time with these op-amps? Hard to believe it gets any better...

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SonicSleuth

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I swapped out the factory op-amps for LM4562's
More detail and separation of vocals/instruments with these little jewels
Hmm LM4562 wonder if those will go on my TPA3255 260-2-29A board. No sockets though and they're balanced ones, does have a single ended mode though.
 

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Guddu

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Aiyima’s PFFB amplifier, first look

View attachment 346797
View attachment 346798

Adding in some details here for Aiyima's TPA3255 PFFB Amplifier, few things I could confirm with Aiyima:

Sub-Out Volume Control with Volume Knob - YES
Low Pass Filter - Probably Yes, adjustable LPF
Capacitance - 63v
PSU - External, probably default would be 48v GaN
Stereo only, or mono/stereo - mono/stereo switchable
Availability - Most probably in March 24
 

MCH

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Sub-Out Volume Control with Volume Knob - YES
Low Pass Filter - Probably Yes, adjustable LPF
You should insist: what people need is an adjustable high pass filter, most subs come with an adjustable low pass filter.
 
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Guddu

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You should insist: what people need is an adjustable high pass filter, most subs come with an adjustable low pass filter.

I pass on all your suggestions that I get in the forum, along with mine, but I am only passing on the information here that I get confirmed from manufacturer.
 

xschop

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Adding in some details here for Aiyima's TPA3255 PFFB Amplifier, few things I could confirm with Aiyima:

Sub-Out Volume Control with Volume Knob - YES
Low Pass Filter - Probably Yes, adjustable LPF
Capacitance - 63v
PSU - External, probably default would be 48v GaN
Stereo only, or mono/stereo - mono/stereo switchable
Availability - Most probably in March 24
Curious if the volume control knob will integrate the power on/off switch?
 
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Guddu

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Curious if the volume control knob will integrate the power on/off switch?
I think YES, however I don't like it personally.
I never had any issues with 2 Aiyima A07 Max units related to power switch, and Aiyima would probably do the same type - on/off by turning.
On the other hand, I really like everything about Fosi ZA3 except its power on/off implementation which has finally failed on the test unit I had.
 

xschop

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Ok. I'll plan to add a dial stop feature to it's custom case then. This actually makes it easier to adapt the new feature without having to add a power switch on back during the conversion. Thanks again.
 
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Guddu

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I’d like to see a switch to set the gain to use these amps as a pure power amplifier, or a non volume controlled version

I am looking for a small setup of amps to be used with active speakers and a Dsp
Even though we can max out vol pot to minimize its impact (if any) but me too would like amp without fussy volume control to avoid any unnecessary component out.
 
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Guddu

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Yoku-San

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Yes, Fosi have mentioned it in a few posts as well.
But is it their developed module/amp or whatever they have been buying off the shelf like 3e or Sylph module?
Anyways, looks like some good projects are coming up soon.
I guess they implemented PFFB on their own designs. The 3E board would be too expensive.
 
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Guddu

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I guess they implemented PFFB on their own designs. The 3E board would be too expensive.
That’s really cool if @Fosi Audio have done it successfully on their own.
We should wait for the launch and price.
 
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Guddu

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Some more information
———————————
XLR input sensitivity: 3.8Vrms (19dB)
RCA input sensitivity: 1.9Vrms (25DB)/ 0.95Vrms(30 DB)
+ 12v Tigger input
Sub Out: note: Adjustable output cutoff frequency
 

AIYIMA

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AIYIMA A70 has started pre-sale. This amplifier is equipped with PFFB, and we have sent the sample to Amirm. It has arrived and we are waiting for Amirm to test it.
This is the pre-sale link:
 
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