Bellboy718
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With nothing hooked up to the rca input I just tried using the auxiliary 3.5mm as an input and nothing happened.
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Aiyima A07 PRO
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Zek
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According to Aiyima's scheme, that 3.5mm connector is Line Out, it is possible that one of the 5 OP amps serves for that line output.
On the A07, it is indicated that the 3.5mm connector can be both input and output.
On the A07, it is indicated that the 3.5mm connector can be both input and output.
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Thank you for the information.
Checking the printed circuit board pattern of the new model A07 Pro, you can see that the wiring of the 3.5mm jack is connected to an IC chip that seems to be an OP amp, unlike before.
In that case, it seems that the 3.5mm jack of the new model has an op amp buffer added and is dedicated to output. I have to correct my previous statement.
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Guddu
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This seems to be correct, I have checked it as well.
Line out is for output only, this one is different than the previous model Aiyima A07.
AIYIMA:GUO
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According to my audiophile friend, A07 Pro does sound with a little more mid-range clarity & emphasis. If you'd like the sound signature with a little more bass & treble presence, A08 Pro may be a better fit to your liking. As for 5 swappable OP amp chips, very roughly speaking: 1. the front right one is for input buffering and amplification, 2. the front left one is for bass & treble tone controls, 3. the middle left one is for single-ended to differential conversion of the left channel, 4. the middle right one is for single-ended to differential conversion of the right channel, (We'd better use the same model of OP amps for left and right channels at the same time I guess.) 5. and the rear one is for aux output buffering. Deeper fine-tuning for the sound signature to your liking may be possible since you get FIVE swappable OP amps instead of TWO. Now it's your turn to play around with those OP amp rolling stuff if you'd like, have fun & happy rolling 
a question i have is that there's a 'new' A04 coming out and it looks like an A7 Pro without Bluetooth but in that case it seems they make no effort to differentiate the 'old' A04 w/ the 'new' A04 with tone controls
specs are all rubbery enough they seem interchangeable
specs are all rubbery enough they seem interchangeable
Guddu
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A07 Pro uses TPA3255, has Bluetooth and comes with 36v 6a power supply. Expecting Amir’s review soon.
New AO4 uses TPA3251, power supply would most probably be 32v 5a.
Both have tone control, pre/aux out.
Review is mostly done. Hopefully post tomorrow.....
JSmith
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Review is up;
Aiyima A07 Pro Amplifier Review
This is a review and detailed measurements of the AIYIMA A07 Pro stereo amplifier. It was kindly drop shipped to me by a member and costs about $90. As you see the distinguishing factor from some of the other Aiyima amplifiers is inclusion of tone controls. Alas, that is also where the problem...
www.audiosciencereview.com
JSmith
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