AudioControl Rialto 400 Compact 2.1‑Channel Amplifier & Hi‑Res DAC —White (Factory Refurbished)

Big‑system muscle in a half‑size chassis.
The Rialto 400 packs a 100 W‑per‑channel Class AB amp, a Wolfson® hi‑fi DAC, and Audiocontrol’s AccuBASS® processing into a case small enough to hide behind a bookshelf speaker. Whether you’re juicing a pair of towers, driving outdoor speakers, or giving your Sonos/HEOS zone a serious upgrade, Rialto delivers velvet mids, iron‑fisted bass, and 24‑bit/192 kHz clarity—all backed by Skadi’s 1‑year warranty.

Key reasons you’ll love it

• Serious power – 100 W × 2 @ 8 Ω, 200 W × 2 @ 4 Ω, or 400 W bridged mono for sub duty. AudioControl Pro

• Wolfson WM8740 DAC handles 16/24‑bit PCM up to 192 kHz for ultra‑low noise. AudioControl Pro

• Smart input‑priority switching – Optical, coax, RCA, or speaker‑level with signal‑sense auto‑wake—ideal for voice devices like Alexa / Google Home. AudioControl Pro

• Dedicated subwoofer pre‑out plus AccuBASS® to restore low‑end punch at low volume. AudioControl Pro

• Tiny footprint – only 8.5 ″ W × 5.4 ″ D × 2.9 ″ H, weighs 2.7 kg. AudioControl Pro

• Built in the USA & designed for 24/7 custom‑install reliability; 5‑year manufacturer warranty (Skadi adds 1 year on refurbished units). AudioControl Pro

What’s in the box

• Rialto 400 amplifier (factory‑refurbished)

• Power cord (North‑American)

• Quick‑start sheet

(Skadi repacks each unit with recyclable foam inserts; carton may show minor cosmetic wear.)

Technical specifications