Innuos Next-Gen FLOW MSB ProISL Module

MSB designs its DACs to receive music through ProISL, its own interface, carried over optical fibre. Feed an MSB DAC through ProISL and it gets the signal in the form its engineers intended, with the electrical isolation that only light can provide. The ProISL Module gives the Innuos Next-Gen FLOW that native connection, so your MSB DAC hears a precisely reclocked signal in its own language.

Your MSB DAC, fed in its own language.

The Design

The Next-Gen FLOW is a dedicated USB master reclocker. It takes the USB signal from your server, discards its timing, and rebuilds it against a reference-grade 3ppb OCXO, the same clock Innuos uses in its flagship NazaréFLOW. Its power supply pairs a 300VA transformer with ARC6 active rectification, and CX regulators feed both the clock and the module section, so the output module works from clean, dedicated power.

The ProISL Module is the final link. It takes the FLOW's reclocked signal and delivers it to your MSB DAC as ProISL over fibre. Because the connection is optical, the electrical path between source and DAC is broken entirely, keeping ground noise from the rest of the system away from the converter.

How It Sounds

The Next-Gen FLOW brings the reclocking concept of Innuos's flagship NazaréFLOW to the ZEN Next-Gen series, and Innuos describes the result as greater focus, realism, and accuracy. We'll share our own impressions as soon as we've spent time with it.

Where It Fits

This module is for MSB owners who want an Innuos source chain that ends in MSB's preferred input. The FLOW works with any USB source and is designed to match the ZEN Next-Gen, ZENith Next-Gen, and STATEMENT. Pair it with the Next-Gen NET switch and the whole chain, from network to DAC, is built for the same goal.

Before you order, confirm your MSB DAC has a ProISL input. Tell us your model and we'll check it with you.

Press Recognition

The Next-Gen FLOW and its modules debuted at HIGH END Vienna in June 2026, and reviews are on the way. We'll add them here as they're published. Read the launch coverage at The Absolute Sound

Want to confirm ProISL on your MSB DAC, or plan a complete Next-Gen chain around it? Give us a call. We'll help you put it together.

Specifications

• Type: Native-protocol output module for the Innuos Next-Gen FLOW
• Interface: MSB ProISL, optical fibre connection
• For: MSB DACs with a ProISL input
• Host: Innuos Next-Gen FLOW USB master reclocker
• Clock: Next-Gen FLOW 3ppb OCXO master clock
• Power: Module section powered by the Next-Gen FLOW's CX regulators, from a 300VA transformer with ARC6 active rectification
• Installation: Ordered with the Next-Gen FLOW and installed by Innuos or an authorized Innuos dealer
• Availability: Q4 2026
• Country of origin: Portugal (handmade in Faro)