I'm also very interested in the Klipsch home theater pack speakers and I'm very interested in this amp, are you 100% sure you have it setup properly?My review of the A09:
(tl;dr don't buy it)
For the price, the overall sound quality is better than I expected, but this unit is not usable due to some major design issues.
1) The pre-amp LFE (subwoofer) output is not controlled by the main volume knob, so the amount of bass is never consistent with the overall volume; it's just a fixed amount of bass even if the volume knob is at zero. This is absurd and disqualifying on its own.
2) The amount of bass output is so strong I had to set my subwoofer gain below 5%.
3) Even though there is a port for subwoofer in, the actual signal going to the subwoofer is just pulled from the other channels; the subwoofer input seems to be a dummy port, and when it is connected in isolation, no sound goes to the subwoofer.
4) When there is no sound output, even when all input lines are disconnected, a scratchy digital static noise is transmitted to all the speakers, making it awful to leave in standby.
5) It cannot decode DTS or Dolby Digital signals via the fibre optic connection (only standard 2.0), making the optical port practically useless on a product branded to support 5.1, so I had to use RCA cables, and the result was still not true 5.1 for the reasons above.
I am using this Aiyima product with the Klipsch Reference Theater Pack 5.1 Surround Sound System. I bought it because of its small size, hoping it would be good enough, but now I have to go buy a proper name-brand product. This was a waste of money, and I can't imagine it working for any home application.
I did reach out to Customer Service, which was not helpful. Marion asked me to make a video of the problem before they could provide advice, even though I provided detailed information. When I have time, I told them I would create a YouTube review.
In the PC for me to have LFE properly working on any kind of receiver with 5.1\7.1 analog inputs I have to go into my soundcard and set "Enable Bass Redirection" or else the Subwoofer volume does nothing and in fact the subwoofer output from the soundcard outputs nothing without that option enabled.
Also the subwoofer knob in the front doesn't allow to control the Subwoofer volume???
I'm very interested in this Aiyima A09 or this: https://brzhifiaudiobd.com/products/model-nopad-pm-02/
ps: I have a 7.1 receiver but can't fit it in my gaming setup and not a single receiver I ever seen fits here so I'm very interested in this small size 5.1 analog amps, but it sucks that there's no info about them anywhere and also it sucks is that there's no LFE option for it which currently I have a mix of different speakers and my receiver allow to customize the LFE frequency per each pair of speakers so the bigger tower speakers can have more bass and the others less and below what I set all goes to the subwoofer, however with the klipsch pack since they are very similar it wouldn't be a big problem as I can set for all in the software of my soundcard...
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