Dan D’Agostino Momentum Z Mono Amplifier $125,000 a pair Review
September 8, 2026 § Leave a comment
https://pt.audio/2026/08/30/dan-dagostino-momentum-z-mono-amplifier-review
Since my Alexx V arrived, very few upgrades have moved the entire system this far forward. The Dan D’Agostino Momentum Z is one of them. This is not a small refinement to the Momentum formula. To my ears, it is a step function. I am hearing things from the Alexx V at whisper quiet levels and at the other end of the volume knob that I simply had not heard before.
What makes this even more interesting is where D’Agostino goes from here. Out of the gate, the C2Z and Momentum Z combination felt like it was nipping at the heels of the Relentless systems I have heard. Dan and the team have already moved the goalposts again, taking the Z technology into the new Relentless Z Preamplifier, Relentless 800Z, and Relentless Epic 1600Z. That tells me the Momentum Z was not just another product cycle. It was the beginning of a new architecture for the company.
I also cannot stress enough how much I love that they managed all of this while staying true to the original Momentum form factor. The Z is heavier, more complicated, and much more ambitious inside, yet it still looks and lives like a Momentum. It fits on a normal rack shelf. At this level, that matters more than it might sound.
If you own an S250 or M400 and can swing the cost, the Dan D’Agostino Momentum Z gets my highest recommendation. In fact, if I were choosing between this and chasing the next source upgrade, I would do the amplifier first. The Z lets you hear more of everything already in front of it. I am hearing things from my Alexx V, at extremely low and extremely high volumes, that I simply have not heard before.



Sendy Audio Kylin $1,499 Review
September 8, 2026 § Leave a comment
https://www.headfonia.com/sendy-audio-kylin-review/#google_vignette
So, I had to take my most insensitive headphones to perform the listening testing. The Sennheiser HD6XX was also fine, as it’s high impedance and the noise couldn’t come through. And the thing is, once you have the right headphones connected, the Sendy Kylin is pretty excellent. Maybe they only used their own planars to test it and nothing easier to drive?
So, with my heavier loads, the Sendy Kylin exhibited a very mature and sophisticated sound signature. Not too warm and not cold in the least, despite using an ESS chip. Together with the Questyle Sigma Pro, it’s one of the more organic-sounding implementations of an ESS converter that I’ve heard. Long-term listenability is great, provided you have the right headphones.
In terms of technicalities, the Sendy Kylin is also one of the more impressive all-in-ones I’ve heard. There’s a very believable transmission of timbre and overall recording venue ambiance. I had to use my Moondrop Skyland to really explore the depths of it all. Macro dynamics here are stronger than minute shifts, likely because of the relatively high noise floor.

TechDAS Air Force IV/Reed 1H turntable/arm Review
September 7, 2026 § Leave a comment
https://www.hifinews.com/content/techdas-air-force-ivreed-1h-turntablearm
I am not going to say it was as night-and-day as comparing tubes with transistors, but careful, intense and even frustrating listening allowed me to differentiate between the two, the vast cost disparity notwithstanding. That in itself makes all of this moot. But I was able to tell which was which thanks to my old faves, the J. Geils Band.
‘Did You No Wrong’ from Ladies Invited [Atlantic SD 7286] features each of the band’s members displaying virtuoso talents on guitar, harmonica, drums and assorted keyboards. Both decks allowed the listener to zoom in on each, or simply sit back and savour the experience. Where the two differed was in presentation. The Air Force III was more revealing, more analytical, with the kind of grip and command which places great demands on the rest of the system.

EMM Labs PREi preamplifier Review
September 7, 2026 § Leave a comment
With the EMM, the soundstage was very clear. Mostly, the instruments were placed on each side, as was common with early stereo, but in ‘So What’, Miles’ horn came out from the right toward the center, with a remarkably three-dimensional effect. The result was spellbinding, as that solo can be. ‘Freddy Freeloader’ sounded as if it had been recorded with a different mic set up. It was still left-right, but the horns seemed more up front, with more space around them, and with a bit more warmth. The detail, again, was superb, but in the service of the music. Miles’ occasional hesitancies in his attacks, his sudden volume changes, and his other somewhat unusual expressive devices, were as – or more – clean and clear than I’ve ever heard.

STROMTANK S-6000 ALPHA – UNCOMPROMISING POWER
September 5, 2026 § Leave a comment
Stromtank S-6000 Alpha – uncompromising power for the ultimate high-end experience
The Stromtank S-6000 Alpha represents the pinnacle of clean power delivery for the most demanding audio systems. Designed as a true reference solution, it provides enormous power reserves and an exceptionally pure energy supply, allowing high-end components to perform at their absolute best. With its advanced battery technology and complete mains isolation in OFF-Grid mode, the S-6000 Alpha creates the ideal foundation for maximum transparency, dynamics, and musical realism.

Heaven 11 Billie Mk. 3 Spartan Integrated Amplifier | REVIEW
September 5, 2026 § Leave a comment
https://pt.audio/2026/08/09/heaven-11-billie-mk-3-review
Mids and treble conveyed satisfyingly on Be Quiet as well, as a lovely sense of balance ruled the day. Molvaer’s trumpet sounded especially vibrant while retaining its correct tonal balance and brassy color. I was also impressed by the complex timbre of the piano, which is especially difficult to capture and reproduce on many recordings. This one seems particularly good, and the Heaven 11 Billie Mk3/BMR monitor combo captures it exceptionally well, especially at the price points of the components. Ditto for the final cut of Be Quiet, which features a lovely duet between cello and trumpet. As a shout-out to the midrange, the cello acquitted itself with an appropriately rosiny growl that really got my attention the first time I really sat in the listening seat and truly absorbed it. My son is an accomplished cellist, so I’ve heard that instrument played live more times in my home than I can count, and that rendering sounded darn near real via the Heaven 11 Billie Mk3 playing through the BMR monitors. Highs were airy and effervescent, signaling an excellent match between the Heaven 11 amp and the Philharmonic speakers’ air motion transformer tweeters. I don’t usually pay excessive attention to the treble, provided it doesn’t call too much attention to itself, sounding peaky or brittle. Here, it was anything but, leaving me slack jawed over my pure enjoyment of it. I suppose the treble in this case did bring itself to my attention, but in a very positive light!


Franco Serblin Accordo Unica loudspeaker Review
September 4, 2026 § Leave a comment
https://www.hifinews.com/content/franco-serblin-accordo-unica-loudspeaker
To reiterate, in the wholly solipsistic Kesslerverse, this Franco Serblin speaker joins a motley crew of disparate designs. Solely relative to my biases, it’s up there with the Apogee Scintilla [HFN Sep ’85], Quad’s ESL [HFN Nov ’57], and Wilson Audio’s Watt/Puppy [HFN Nov ’90].
So, for those of you looking to this magazine for guidance, let me offer a caveat. Undoubtedly, the hi-fi marketplace is not just crowded but overburdened with costly and massive loudspeakers. If two-thirds of them disappeared, there would still be too many from which to choose. But if the Accordo Unica is in your price/size range, I implore you to hear a pair. They’re that good, and the fact they’re also drop-dead gorgeous is pure bonus.
Hi-Fi News VerdictPlease forgive the rampant use of arguably irrational superlatives, but I found the Franco Serblin Accordo Unica to be a spectacular loudspeaker. It balances grace with power, transparency with warmth, scale with minutiae. Detail, dynamics, transient attack – it reminded me of how Serblin rewrote the rules for speakers 40 years ago, in sound and looks. I could only find one fault with the Unica: that I don’t own a pair.

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