Thank you for purchasing A5/A7/A7 mono series amplier which has latest opmized post lter feedback
design, we hope it could bring you more fun to enjoying music!
It is recommended you read this manual rst before you starng to use all features of this amplier.
The A5/A7/A7 mono series amplier are the rst-generaon nished amplier we make that integrated
with mul-funcon that based on user needs like op-amp changeable and auto audio sensing technology
which bring more exibles for various use cases. The A5/A7/A7 mono series amplier are also use high
quality capacitors, inductors and also implemented high quality PCB design to ensure its highest
performance.
By including auto audio sensing power on and o automave to reduce power lose for green energy saving
and also thermal dissipaon, user can easier to use with other DAC source to reduce the complex operaon
of the whole audio system.
Our engineering team put many eorts on opmizing the post lter feedback design based on Ti’s
recommendaon and achieved a very great performance with 0.0003% THD+N(A-wt) at a typical 5W
output, this is the best data based on TPA325x design in the world (as of Oct-2024), in the meanwhile,
frequency response also had been extended to 35KHz within 0.5dB deviaon.
For some user that used to use their DAC source to fully control the volume, there is an opon that we add
into this product is volume bypass mode, which disable protenonal meter in audio path to fully ensure a
pure audio signal chain from the DAC source to the amplier output ll speaker end, achieving the ulmate
sound quality experience.
Furthermore, this product support op-amp change to maximum user’s diy hobby as they experienced that
dierent op-amp bring them dierent sound percepon, an easier way without opens the chassis is
implemented in our design to save user’s operaon process and also reduce the risk of disassembly, see
operaon secon for detail.
Finally, enhanced design, exceed the edge, enjoy sound with passion are always our mission and we
sincerely hope you enjoy our products.
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