Mastering Buffer Model BII - ex-works MINT

Whest Audio Mastering Buffer BIIS | Class-A Discrete Analogue Output Conditioner | The Ultimate Digital Source Upgrade

Your Streamer Is Holding Back. The BIIS Fixes That.

You've invested seriously in your digital setup. A high-end network streamer. A premium CD transport. Maybe both. But here's the uncomfortable truth that no manufacturer wants to print on the box — every digital source on the market, regardless of price, is operating at roughly 40% of its true potential. Not because of the DAC. Not because of the cable. Because of the analogue output stage.

The Whest Audio Mastering Buffer BIIS was engineered specifically to solve this — and nothing else on the market solves it the same way.

This Is Not a DAC. This Is Something Better.

The BIIS isn't another digital upgrade chasing marginal gains. It's a fully discrete, Class-A analogue output conditioner — a precision-engineered signal conditioning stage that takes the compromised analogue output of your CD player, network streamer, or digital transport and transforms it into something your system was always capable of, but never delivering.

No firmware update, no power supply swap, no exotic cable can do what the BIIS does. Because none of those address the actual problem.

Why Your £3,000 Streamer Is Underperforming Right Now

Every digital source — from entry-level streamers to five-figure reference machines — shares the same fundamental weakness: a poorly executed analogue output stage. Poor current drive, restricted voltage rails, and compromised phase response mean the high-resolution audio your device creates internally never fully survives the journey to your preamplifier.

The result? Compressed dynamics. Smeared bass. A soundstage that never quite locks in. A sense that something's missing — even when you can't pinpoint what.

The BIIS fixes all of it. Simultaneously.

How the Mastering Buffer BIIS Works

The BIIS accepts the analogue output from any digital source and passes it through an ultra-high-speed, fully discrete Class-A transistor stage — phase-aligned, high-current, and operating across a total bandwidth of 385kHz. What comes out the other side is your music, fully realised for the first time:

• ⚡ Full voltage rail headroom — dramatically expanded dynamic range that makes every track hit harder and breathe more naturally
• 🔌 High-current output drive — capable of driving any interconnect cable without signal degradation, tested to a remarkable 50 metres
• 🎯 Phase-aligned output — correct phase response under real-world load conditions, something your digital source has never achieved on its own
• 📊 Channel-matched frequency response to within 0.1dB — precision stereo imaging that stays locked and accurate across the entire frequency range

The Proof Is in the Listening

In Whest Audio's own controlled listening tests, a 1996 Marantz CD63 KI Signature connected through the BIIS consistently outperformed a 2018 MBL C31 — a reference CD player costing over £10,000 — playing without one. Across every parameter: dynamics, bass definition, midrange clarity, and overall realism. The source hardware mattered far less than the signal conditioning stage downstream of it.

That's not a marketing claim. That's a result.

Two Inputs. Total Flexibility.

The updated BIIS features two analogue inputs, allowing you to connect two digital sources simultaneously — a CD transport and a network streamer, two streaming devices, or any combination that fits your system. One switch. Two sources. One transformative improvement across both.

The Smartest Financial Decision in High-End Audio

Here's where the BIIS makes an argument that's hard to ignore. A £400–£500 CD transport running through the BIIS will outperform any standalone CD player up to £4,000 — not marginally, but convincingly. And when that transport eventually fails, you replace the inexpensive transport. Not a flagship machine. The BIIS stays. Your investment is protected indefinitely.

Future-proof. Cost-effective. Sonically transformative.

Technical Specifications

Have a question about integrating the BIIS into your system? The Whest Audio team are always happy to help — contact them directly at whestworld@fastmail.fm