TL; DR: The finest headphone I have ever heard for well-recorded music
Equipment used for this review:
Luxman 505u integrated amp (100 watts into 8 ohms)
Qobuz / Tidal streaming through a mac
Chord Hugo Mscaler and Qutest
VPI Classic 1 turntable with Nagoaka MP300 cartridge
Schiit phono premap
PS Audio P5
Albums referenced in this review:
Gillian Welch: The Harrow & The Harvest (LP)
Protomartyr: The Agent Intellect
Father John Misty: I Love You Honeybear
Danny Brown: Old
Run the Jewels: RTJ3
Hiro Kurosaki / Linda Nicholson: Beethoven sonatas for violin and piano
Waxahatchee: Ivy Tripp
La Gaia Scienza: Fur meine Clara
La Gaia Scienza: Haydn in London
Everything But the Girl: Idlewild
Alban Berg: Brahms - String Quartets
Fleetwood Mac: Fleetwood Mac
Frank Ocean: Blonde
Kepler Quartet: Ben Johnston, String Quartets 6,7 and 8
Wilco: Yankee Hotel Foxtrot
Tinariwen: Elwan
Alina Ibragimova and Cedric Tiberghien: Beethoven’s Violin Sonatas
Dr. John: Gris-gris
Doric String Quartet: Korngold
Joanna Newsom: Divers
The White Stripes: Elephant
Laurence Equilbey: Mozart, Coronation Mass & Vespers
My background and what I value in musical reproduction
I got into the world of hifi shortly after starting my first decently paying job, deciding to spend what seemed like an extraordinary amount on a Hifiman HE500 and Lyr 2. I plugged the headphone in, clicked play on my obsession at the time, I think it was Martha (DIY band) and started to smile, an entirely new mode of experience opening up for me. And ever since then, I’ve been hooked. I quickly scaled up, buying TOTL headphones, trading up amps, finding out what I liked and didn’t. And what I liked most was a huge soundstage. I remember experimenting with some decent in-ear Shures, they were around $500 new, and realizing immediately that this method of music reproduction had no appeal for me.
Soundstage is more important to me than anything else -- more than an accurate frequency response, more than detail retrieval, more than transparency. It’s why I like the HD800 most out of all headphones, even though I hear more detail with the Utopia, and better transparency with the HE1000. The other thing I look for in my equipment is recreation of a certain roundness or wetness in music - it’s tough to describe exactly what I mean, but when I see a string quartet play Haydn live, the music has this quality of roundness that I’m hyper aware of - the quality of a true analog signal, like in well-recorded, analog vinyl, something like the White Stripe’s Elephant. So when I use “roundness” here I’m talking about an impression of being as close to an analog experience as possible.
My foray into speakers and introduction to SR1a
About six months ago, a revelation came to me: what I had been seeking this entire time couldn’t be found with headphones - I had to move to speakers. I had purchased Ascend Acoustics’ Sierra 2 speakers (which has very similar tweeters to the SR1a that are also made by Raal) the year before, and had been listening to them occasionally, about 10 feet away, in a medium sized room. I liked them a lot. And then one day I experimented, bringing them within about 5 feet, then 4, then 3, then 2. Each reduction in distance actually widened the soundstage and revealed more detail - of course what I was doing was eliminating effects of the room. I found I could listen to hours, enjoying this massive soundstage, getting totally immersed in the music, and no longer feeling the impulse to click around in Roon from song to song; I had reached what was for me musical perfection. I now listen at any point between about a foot and 2.5 feet from my speakers depending on volume, desired soundstage, and imaging. When everything is dialed in and I’m listening in the right spot, I almost visualize the musicians playing in front of me.
I had resorted to my HD800 for those times when I couldn’t listen to speakers in my small apartment. And then I tried
@Zhanming057 ‘s SR1a over at @llamaluv’s place - I knew instantly this was the headphone for me.
@llamaluv and I both decided on the spot we had to have these. The SR1a does things that I’ve never heard from any other headphone, and in many ways reminds me of the virtues of my Sierra 2 speakers in nearfield - extreme speed, immersive soundstage, pinpoint detail. Compared to other TOTL headphones, I find it most resembles the Utopia, but corrects several of that headphone’s flaws (tiny, close soundstage).
Classical
I feel that the SR1a works well with nearly every classical recording of one or two instruments. Something like La Gaia Scienza’s Fur Meine Clara (fortepiano music of Schumann) just sounds so transparent, detailed, and lifelike; I’ve never heard better through any headphone. I can enjoy an album like this as much through the SR1a as I can with my Sierra 2 speakers. Similarly Bach’s solo music for cello, keyboard, or violin - it doesn’t matter who’s performing, nearly everything I put on sounds fantastic.
With recordings of more than two performers, it gets complicated. Back when I had a Chord Dave, Blue, Utopia and HE1000 I categorized my classical albums in Roon into those that sounded best with the Utopia and those that sounded best with the HE1000 - nearly always there was a definite, clear improvement with one headphone versus the other. Initially I thought that the SR1a didn’t sound so great with string quartets or orchestral music -- but it turned out I had mostly been listening to those albums that were synergistic with the HE1000, not the Utopia. When I filtered Roon to select just those albums I had marked as “Utopia” and tried the SR1a, I found the SR1a often sounded fantastic. For example, albums by Doric String Quartet, such as their recording of Korngold, sounded best to me with the Utopia, and sure enough with the SR1a this recording shines. Same thing with Gaia Scienza’s Haydn in London. Recordings of many instruments, for instance something like Laurence Equilbey’s recording of Mozart’s Coronation Mass & Vespers sounded best with the Utopia, and also the SR1a. The wrinkle here is that I tended to find a substantial portion of my orchestral music sounding best with the HE1000. So - do I think the SR1a works for string quartets and orchestral music? Absolutely, and some of the best I've ever heard with headphones, but it’s recording-dependent, and I do still prefer speakers over any headphone for string quartets or orchestral music.. Other chamber music that I thought sounded good with the SR1a were Hiro Kurosaki / Linda Nicholson’s Beethoven sonatas for violin and piano, Kepler Quartet’s recordings of Ben Johnston’s string quartets, and Beethoven’s Violin Sonatas by Alina Ibragimova and Cedric Tiberghien.
Hip Hop
I gave it a shot listening to Danny Brown and Run the Jewels and determined that there just was not enough low-end slam with the SR1a to listen to this genre with headphones -- I needed speakers. Then I toyed with the setup of the drivers. I closed the fins as closely as I could, and placed the drivers directly on my earlobes. There was a ton more bass - it actually become somewhat visceral, and I got into a few songs. When I tried this setup with acoustic music, though, the sound was a little dense - acoustic music can't have the fins closed all the way in.
Pop and Indie
A range of results with pop and indie music, from unlistenable to fantastic depending on quality of the recording. I’ve always been impressed by the sound quality of Everything But the Girl’s albums online - fidelity is very close to my vinyl, and when comparing the two formats I often can’t tell which I prefer. Listening their 1987 Idlewild I’m loving this clarity, roundness, and immersive soundstage. This works with the SR1a. I love the music of Fleetwood Mac and think their high-res albums on Quobuz sound great. WIth the SR1a I’m completely absorbed in their eponymous 1975 album. This is working too. I never really appreciated The Velvet Underground until I heard Raal’s drivers. The Velvet Underground’s 192/24 albums on Quobuz sound amazing - here again I get a sense of roundness and clarity that’s just so appealing. Frank Ocean’s Blonde is underrated - basically this is an album that requires hi-fi equipment to enjoy - you can imagine Frank noodling in his studio for hours, getting the sound just right on his pro equipment -- not surprising that for most listeners this album didn’t really connect, but with the SR1a, whew, it’s a winner. Another great album with the SR1a that maybe isn’t much of a surprise: Wilco’s Yankee Hotel Foxtrot.
Here’s something that’s not working for me: Waxahatchee’s Ivy Tripp: super compressed, harsh, no sense of roundness with the SR1a - I don’t listen for long - this will require speakers. Something that sort of works is Father John Misty’s I Love You, Honeybear. One of my favorite artists but not music that I think is recorded especially well. On the SR1a, this is certainly listenable but I’m missing something - this too sounds better on speakers.
World
Don’t listen to that much world, but here I had fantastic results with Tinariwen’s Elwan - bass went deep, super deep, I heard such clarity, great roundness and an expansive soundstage.
My Kawai VPC1 Digital Piano with Ivory 2.5 Studio Grands
I often need to use headphones with my digital piano, and have never been very happy with the sound until now. Each TOTL headphone I’ve used in the past has produced strange effects. The HE1000 was too bassy, the Utopia was too closed in. With the SR1a I’m getting a completely flat frequency response across the keyboard, including strong bass. The level of detail that this headphone picks up is phenomenal. Ivory 2.5 comes with many settings where previously I wasn’t able to tell much of a difference, but now the contrasts are much sharper. When I play with the SR1a, all the equipment seems to fade away and I’m left deeply connected to the sound of the keyboard - it’s the most realistic thing I’ve ever heard from digital, and the first time I’ve ever been satisfied with a non-acoustic piano. In a hypothetical where I didn’t like the SR1a for recorded music, I would nevertheless absolutely keep it for the sole purpose of playing with my keyboard.
Vinyl
The SR1a will reveal definitively for you which of your albums were recorded well and which not. I played Gillian Welch’s Harrow & Harvest (well recorded folk) and immediately noticed that sense of roundness that I love, that pure analog goodness. And then I played Protomartyr’s The Agent Intellect (post-punk) and was overwhelmed by the flatness of the sound, compression, and excess treble. I actually like this album with my Sierra 2s quite a lot - perhaps it’s the impact of the woofer which makes it listenable with speakers. Like with my digital music, I am getting a lot of variation in terms of recordings that are synergistic with the SR1a. Joanna Newsom’s Divers sounds great through my speakers; through the SR1a, a bit trebly and little depth. Meanwhile with H.C. McEntire’s Lionheart - imaging, soundstage, depth, frequency response - it’s all clicking.
Other Notes
I was using an ifi ican pro as a preamp into my Luxman 505u - everything sounded thin and too trebly, and then I went directly into the Luxman - so much better! It’s also possible I don’t have the right amp for this headphone, maybe with more power additional string quartets and orchestral music will come alive for me. All of the 192k/24 bit recordings on Quobuz have been sounding amazing with this headphone. Check out Dr. John’s Gris-gris, for example - never liked it with any other headphone. I haven’t found any album from the 60s that I don’t like with the SR1a.
Conclusion
Although I still prefer speakers, this is the best headphone I have ever heard. My comparison set is HD800, HE1000, Utopia, and Abyss TC. The SR1a’s virtues are really apparent when listening to well-recorded music, and the technology and sound are so radically different from what most are used to, I suspect this will be a polarizing headphone. If I were to get any other headphone to supplement this it would be an Abyss. You probably won’t want to listen to much hip-hop with this headphone, but find some excellent classical or pop recordings and you’ll be in heaven.