Have you had a chance to compare it to any other similar integrated amps in this price range and category?Cool beans bro! I like the D03 and did wonder about the sub. Even Aiyima state the D03 has the edge over the D05 in regards to control over the sub so it is nice to read this as confirmation. I agree about the treble too. I have to increase the treble to very nearly max output to get a relative balance using Bluetooth which is not a deal breaker by any means as it does sound very good once implemented. Overall I would agree a great little desktop amp that certainly covers the digital l/O bases I would need with out adding a Dac and for less than £100!