Same experience in Europe for BStock unit bought in Europe recently. Imo its plain noise in the input stage, pre ADC. My experience doesnt align with Aku's, the noise is still there when theres an active signal, simply harder to notice. 80hz cuts it at the dsp stage. LFE/120 mode cuts it partially as it would be around -12db assuming a 24db/octave filter. External makes it clearly listenable from MLP, especially during quiet hours. So i assume the fix from Kali is a dsp notch, because if it were fully fixable it would disappear completely, not go down by 8db or whatever. Anyway, im keeping it since theres nothing that can touch it for the 469 i paid right now in the market and im using it for music and tv duty without multichannel. Hard to say if eletrically fixed batches ever made it to Europe. A shame Kali hasnt stricter testing before releasing products, as they clearly are capable of putting out great stuff. Great thread and props to aku for the initial characterization, it was a real time saver.
