Audiophilepure

At the heart of the device, you’ll find the AKM AK4493S DAC chip, supported by an XMOS XU316 USB processor, and a dual op-amp configuration—OPA1612 and NE5532DR. A setup designed to deliver reliable digital-to-analog conversion, compatible with a broad range of sources and formats.

What’s interesting though, is the fact that those DIP8 op-amp are now swappable, allowing you tot put much stronger solutions, like the one from Burson for example.

Upstream, the XMOS XU316 controller allows the Q6 to support high-resolution PCM streams up to 32bit/768kHz and DSD512 via USB, while optical and coaxial connections remain capped at 32bit/192kHz—pretty much covering any need you might have for home or office audio.

For the analog section, the brand selected a classic duo too, combining the OPA1612 and NE5532DR to maintain a wide channel separation, while keeping the noise low.

Numbers? Signal-to-noise ratio is rated at 121dB, with a quoted THD as low as 0.00012 – pretty good number for a $100 DAC, beating the SK02 to its own game!

https://www.stereophile.com/content/unison-research-s6-black-edition-integrated-amplifier

“The S6 Black Edition was created to exceed the musical performance of the standard S6 version,” Nasta told me in an email. “Compared to the standard S6, we gained more power, better sonic detail, and the lowest possible noisefloor. “In general, when we design an amplifier, we look for instrumental and musical performance as sound scene reconstruction. We try to recreate a sound event as close to reality as possible, without artifice, that can be listened to for the long term. All with a touch of Italian design.”

So far, this all sounds sophisticated but analog-purist: old school. But that’s not the whole picture: The S6 Black has a built-in DAC. The “DAC3” module uses a Sabre ES9018K2M DAC chip. Inputs include USB (supporting PCM up to 384kHz and DSD to DSD256), TosLink, and S/PDIF.

https://www.hifinews.com/content/audio-research-ref-330m-tube-monoblock-0

‘Drama’ would be an apt term to describe the sound the REF 330Ms can deliver when partnered with a similarly accomplished system. Loading up the Bergen Philharmonic/Edward Gardner 2020 recording of Britten’s ‘Peter Grimes’ [Chandos CHSA 5250], in which the drama is very much to the fore, there was a warmth and generosity to the sound, but never at the expense of clarity. The sea interludes flowed into the action, with its humour and the sense of unfolding tragedy captured in Stuart Skelton’s impressive Grimes, his voice always seemingly on the point of cracking into despair.

The sound here is about scale and power, and knowing when to strike a balance between tenderness and storm violence, and with the Audio Research amps it’s all handled so deftly, taking the listener into the heart of an atmospheric recording.

https://www.soundstagehifi.com/index.php/reference-components/1947-recommended-reference-component-bryston-bi-200-integrated-amplifier

By joining two of Bryston’s most popular separate components into a single case and chassis, the Bi-200 offers exceptional sound at a reasonable price, especially given its outstanding build quality and extensive warranty. For being a high-value amplifier that’s easy to recommend, as Philip puts it, the Bi‑200 received a Reviewers’ Choice award when the review was published. It is solely for its performance that it has now earned a Recommended Reference Component award.

https://www.soundstagehifi.com/index.php/equipment-reviews/1945-bryston-bi-200-integrated-amplifier

I noticed that the Bi‑200 was the quieter of the two amps. Not so much that I could hear details I couldn’t hear with the B135, but enough to draw my attention to details I don’t normally notice. For example, while listening to “Your Rocky Spine” with the Bi‑200, my ears were piqued by what sounded like a shaker inside the left speaker, something I had never paid much attention to before. Going back to the B135, I could still hear the shaker, but it was not quite as clear, not enough to catch my attention.

I also noticed that the performers were better separated with the Bi‑200—more sharply outlined, with more space between them. But to be fair, the B135’s presentation was far from congested.