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Discover aural nirvana thanks to the Heaven 11 Audio Billie, a high-performance stereo amplifier with few peers. Savor that live concert sound thanks to features such as a custom tube preamp, ICEpower amplification from B&O and Hi-Res DAC. The unit itself is stunning, boasting wooden dials, which in honor of the legends that are Spinal Tap, go all the way to 11.