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Due to the high signal-to-noise specs of the AK4396A, the fact that digital signal is upsampled to 24 bit as well as the added benefit of onboard triple redundancy power source conversion and filtering, the HD6 Bluetooth implementation presents impressive low noise and low distortion characteristics with a noticeable improvement over other Bluetooth devices. But for Bluetooth the AK4396A is used as an upsampling DAC and will pad all bit depths to 24 bit, achieving a higher signal-to-noise ratio and lower noise floor. I found a home for them as my my center flanked by a pair of chourus II and they mate well.I gave one kg 2.5 to my brother who has a pair of Cornwalls and he is happy also. Rather than having two 10-inch drivers, the RF-83 went with three 8-inch woofers. After testing the Klipsch kg 2.5 against my B&W 601 and my Mission 700s all in the same room they came in last place.They had the worst sound quality, soundstage. The RF-83 was essentially a narrower, taller, perhaps more aesthetically pleasing flagship reference floorstander. The optical input configures the AK4396A as a bit-perfect 24 bit DAC, which will process sample rates up to 192kHz natively. Following the original RF-7, Klipsch produced what was heralded as the fire breathing dragons, the RF-83. The HD6 include an AKM AK4396A DAC, widely known for its low-noise and high-fidelity. But with careful signal management circuitry and antenna tuning, we offer a superior solution that has up to 3 times the range of standard Bluetooth for multi-room use, with no degradation in audio quality. Most Bluetooth implementations have very limited range, typically within just one room. High-fidelity Bluetooth aptX HD that really works and sounds great. And even if your phone or tablet does not have aptX HD, the HD6 Bluetooth solution is backwards-compatible with SBC and AAC codecs, as well as standard aptX, so you can wirelessly stream music from any Bluetooth-enabled device and still enjoy all your music. The Bluetooth built into the HD6 powered speakers features aptX HD coding which is an advanced Bluetooth audio codec with very impressive sound.