RAAL-requisite SR1a - Earfield™ Monitor/Headphone - Official Thread

Checkin in … still LOVE my SR-1a with HSA-1a … Definitely a unique headphone that provides lasting enjoyment beyond flavor of the month. Since I bought the combination when the HSA-1a first became available 2 years ago, I have made several tweaks to my chain (DAC, Preamp, Tubes). Every time the SR-1a has scaled up and improved and reflected every little tweak I made.

If you consider buying SR-1a and building a system around it, that’s definitely an approach to take you very close to the best possible listening experience on any personal listening device (excluding floor standing speakers); as long as you are fundamentally OK with the SR-1’s peculiar form factor.

I am currently listening (this is 4 hours non stop with the SR-1a) to Lloyd Cole - Antidepressant (just a great album!). Right before enjoyed a focused session with Verdi - MacBeth (Muti) - the magnificent stage offered by the SR1a works amazingly well with this material (further aided by the ability to tweak its shape with 2 Goodside plug-ins, see below).

My “guilty pleasure” setup for tonight consists of
Mac mini M1 - Audirvana Studio(*) - Wavedream Net - Wavedream Signature XLR - Woo Audio 3ES Elite (as preamp; tubes: Takatsuki 300B and 274B, RCA 5692 Red Base) - HSA-1a

(*) DLNA; 4 Plug-ins: DMGAudio Equilibrium, HG-2MS, Goodhertz Midside 3, CanOpener Studio 3

Biggest smile in the world, makes it easy to wait for the SR-X 9000 a while longer :slight_smile:

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I have the SR1a with HSA-1b amplifier, driven by the dCS Bartok+HP amp - just about perfect. Being someone who is always looking for the “next step” in music reproduction, I have added a KEF C62 subwoofer to “fill in” the very bottom of the bass. What? you say? Why would you pair “ear speaker” headphones with a (subwoofer) speaker? First, the SR1a’s are (very) open. And previously, I tried a subwoofer before with my AKG K1000/First Watt F1 setup, and enjoyed it. Adding low-end frequencies to the SR1a/HSA-1b setup rounds out the presentation. I am really liking it, so far. Now to determine if it is fatiguing over time. Of course, as always, YMMV.

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Yes, it was fatiguing. Returned the subwoofer.

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I added a Kef KC62 subwoofer to my SR1A. Here is how I did it:
My Topping D90 DAC feeds both the SR1A amp and the active sub. The XLR outputs feed the SR1A’s amp, and the single-end RCA outputs feed Schiit Sys passive preamp.
The Sys RCA outputs feed the L/R RCA inputs of the KC62. Using the Schiit Sys, I can control the volume of the subwoofer from my desk.
Your DAC doesn’t need two outputs, you could instead use RCA splitter cables (or XLR splitter if your sub has XLR in).
In my opinion, the subwoofer sound blends with the SR1A pretty seamlessly and really enhances the listening experience.
My room is pretty small, about 10’x11’, 9’ ceiling so the KC62 placed in a corner is plenty of output. I did not feel that I had to crank the sub volume up much to hear it with the SR1A.

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So, an unsolicited update on my journey. I’ve sold the CRBN, have now a STAX SR-009s to further enrich my e-stat experience. I personally prefer the 009s but in the end, nothing compares to the SR1a! Nothing at all! I’ll have some e-stat gear for sale soon.

Next week I should have the new VM-1a tube amplifier and will report back vs other methods of driving the Raal.

On a philosophical note: this endeavor forces one to really consider what represents an ideal sound, what is of priority. As a former musician, for me it is timbre. The way I listen highlights how different transducers and material sciences reproduce recorded acoustic sound. These are sounds I know from life experience. They are sounds reproduced differently based on the design and materials of the transducer, regardless of frequency response. Outside of measurement. An A440 bowed on a gut string vs a steel string on a violin will sound different, and yet still move the same air at 440hz. Well beyond staging, speed, slam, imaging etc. at the very core of an instruments sound is an essence, an identity, a spiral of DNA that makes it unique from other sounds. To my ears, the SR1a reproduces that unique identity with less of its own thumb print.

I find it remarkable we can put an orchestral hall (or bar, or stadium) onto our heads and be transported there to a musical experience. So far in all my quest, the SR1a is my favorite headphone for reproducing music.

Yes, this is a love letter to the SR1a and this is the place for me to write it I suppose. When I searched for commentary on headphones early in my journey, I came here for learning. I got so much of it too, from from many generous members. Sometimes there is also tribalism and vitriol for no good reason. But mostly, sincere sharing of impressions. That’s what these words are.

So, for those who just Googled the SR1a and landed here, this is my resounding endorsement for this incredible device. For all the new releases and heralded flagships I’ve tried, this is still home for me!

Happy Listening.

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Thanks for the update! I’m curious to hear the new estats too, but glad you continue to find the SR1a the right choice.

Let us know how the VM-1a sounds!

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Hey Raal fans or interested:

A friend over on Head-fi is selling an SR1a and HSA-1b for $5000.

FYI, I confirmed this is the new HSA-1b with the gain switch on the back rather than internal. This is a great deal IMO.

Mark,
This is the first I’ve heard of the VM-1a being available, and even though I own your former HSA-1b, I have been intrigued about the VM-1a since it was announced. What do you know about it as yet? I cannot wait to hear your opinion of what it brings to the SR1a sound.
Best regards,
Larry Segil

Hi Larry,

Great to hear from you, hope you are enjoying the HSA-1b, I regretted selling it in the end!

The VM-1a appears not to be on the website on the amplifier page yet, but you can find it by searching for it, link below. It is available to order and apparently they have them trickling in from Serbia for testing and QC. I had a long chat with Danny last week and took the decision to order one based on his description. There are not many in the wild so initial impressions are scarce but positive. This will be my 4th method of powering the SR1a and I will be sure to share my impressions when appropriate. Happy listening.

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Thanks Mark, looks pretty exciting, I am happy enough (more than, actually) to live with the HSA-1b until your and other reviews come in, though I have a feeling that I will take the leap in due time. I am still very pleased with the amp and sorry that you feel the loss. What are you using now? Have you tried the circumaural cans (or anything else that has excited you recently)?
Best,
Larry

I’ll keep the response here on the SR1a thread since it is pertinent. Right now I am listening the the SR1a through a Schiit Freya + in tube mode (I think +12db) and a single Aegir. On paper this would be insufficient for the Raal. In practice, for me, it sounds amazing! Maybe the pre-amp gain makes the single amp enough, although I will note that I think I may listen at lower levels than most. For me this set up is so good that if I do not keep the VM-1a (unlikely) I’ll add a second Aegir to run in dual mono. The benefit as well as that this set up is great for my 2 channel which the HSA1b was just a little underpowered for. This chain gives SR1a weight and substance I do not remember from the Jot R. It is a very natural tonality also, warmer, but maybe not as much so as the HSA1b (from memory).

I have not tried the Raal circumaural cans yet. I have tried the CRBN and STAX SR-009s recently, which was fascinating, but I still favor the Raal.

Almost 2 yr. follow-up, still using a MiniDSP SHD > Freya+ > Jot R > SR1a(w ZMF headband) and have gone the longest stretch in my life without getting another major Hi-Fi upgrade since I was probably 10. Next major purchase will probably be the CA-1a and the Ti-1a adapter.

I have found a “sweet-spot” with setting a high-pass cutoff @35hz(BW42dB/oct) through the miniDSP and a large 80hz bass bump with a master gain reduction in EqualizerAPO to avoid clipping due to gain increase on the bass shelf.

Without the 35hz cutoff I would get distortion at medium-high listening levels(Jot R past 2-O’clock) on bass-heavy tracks or video games with deep sound effects. Happy to answer any longer-term ownership related questions if someone has it.
Cheers, thanks to everyone on headphones.com who shared their experiences, it helped to piece my current setup together.


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After months of travel, I returned home to the SR1a’and HSA1-B driven by my dCS Bartok. I had forgotten just how good this combination sounded.

Once again, I was transported into a space with the performers and music that had that “live” feeling where you could almost reach out and touch it. I am continuously grateful for the experience.

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That was an enjoyable read. I’m glad you found your sound and that our journeys overlapped.

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Hello,
this is my first post here. So firstly I wanna thank you all for a great forum, have read everything about the Sr1a before I purchased them for myself. And man are they epic! Upgraded from Sundaras so quite a leap!

I have used them with a Qutest dac and the jotunheim R. But now the jotunheim died, so will either get a new one OR get the Raal TI-1a conversion box. So my question is:
What kind of amp will I have to pair the TI-1a with to get a solid improvement over the jotunheim r? I can’t spend that much money, around 500 to 1500 dollars…

All input is welcome!

/Linus

Hi @Heffaklump87, welcome to the forum.

Really sorry to hear about your JotR dying. Maybe it is worth paying Schiit to fix it, possibly cheaper than buying a new system?

Regarding what amp to get for the T1-1a, their website mentions some parameters but I think it part it will depend on if the amp is also going to be used for other headphones, and what will work for them.

It is a very new option for the SR1-a and I have not tried it yet, but others have here and at other forums. In your position I’d weigh the cost of fixing your JotR vs a new amp and include consideration for other headphones. The one and only drawback to the JotR IMO is that it is only good for Raal…

Welcome again, I hope you are still enjoying the amazing SR1a.

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The Raal SR1-a: Another Love Letter

I’ve owned the SR1-a twice since I started using headphones frequently at the onset of Covid. I’ve amplified them in various ways. I have also owned now 30 different headphones since I first started participating here on the forums. Many of those were what most would consider TOTL.

The SR1-a is my absolute favorite and everything else has come up short as a replacement. I am a minimalist at heart and also happily married for almost 30 years. I want “monogamy” with my headphones, but have never found one to rule them all as I have in marriage. But the one that never leaves me is the SR1-a, despite the fact that it complicates my desk with dedicated amplifiers.

Here’s why:

Timbre. I’ve said it before, I say it again. Timbre.

As I read the forums I realize that there is an entire generation of hobbyist that only know digital music. I suspect there are many that have rarely, if ever, heard live most of the instruments their gear is reproducing for them. Many will not have played an instrument with others, have had to blend with them, surfing the beat waves of intonation, or reveled in the complicated universe of differential tones. They may never have heard a great orchestra live in a wooden clad concert hall that pre-dates electricity.

This is all fine, music is to be shared and enjoyed in all its forms. This is not a better than thou criticism. But the above mentioned experiences inform a different sense of priorities. And for me, the priority has always been timbre. The Raal simply gets this better than anything else I have listened to, besides reality itself. The Raal convey the very core nature of an instruments’ identity, very successfully. Their speed also makes the music engaging and exciting. They have realistic dynamic range. Do you listen to piano music? I do at least 50%. I have yet to hear another headphone that reproduces piano nearly as well as the SR1-a. In fact, it is often the fundamental flaw that has me selling all other headphones off.

There are many other added benefits as well. For me, the open nature does not inflame my tinnitus as do other favorites (for example the DCA Stealth, an amazing headphone). Closed backs leave me ringing more. Some of you veteran posters may remember I had an injury to my right ear that still haunts me. The Raal go easy on this.

Also, low level listening feels complete. Outside of bass (through some amplification methods) there is rarely an urge to crank it up to an unhealthy level. I hear everything, there is a completeness, even at lower volume levels. This also helps with fatigue and tinnitus.

To their credit, Raal has introduced new methods of amplification which lower the barrier of entry and I hope this will encourage more people to try them. I was ultimately unable to afford their new tube amp, which apparently has them slamming like a mule. But bass is for sure the area where many may consider the Raal disappointing. But even this is deceiving and rests on priorities. They extend very deep, and the bass is textured. However, on some amplification, the bass is not visceral. The Raal are reference, everything is there, but without any euphony.

I’ve been absent the forums for a bit, why am I yet again here to blather on about the Raal? Because I just gave them away!

My daughter lost her hearing from the age of 12 and is legally deaf. She has a cochlear implant in one ear and uses a hearing aid in the other. This is very confusing to the brain, but she has adapted, that is what the brain does with sound. The cochlear implant more or less prohibits the successful use of a traditional headphone. However, the open design of the Raal works very well. At her nearly 20 years of age now, music has become one of the central points of our relationship. My formal studies in ethnomusicology inform what I share with her, and she sends me hip hop. It is a great exchange.

The first time she listened to what she calls the “solar panels”, it was an incredibly emotional experience. Having had natural hearing for the first decade of her life, she remembers what things can sound like. The extreme detail of the Raal combined with their open design, give her more information. Even though she has competing technologies in each ear, it just works. The experience brought tears to her eyes, and as any parent can imagine, mine too.

So my Raal and JotR have moved on to her full time along with my boxes of CDs and I enjoy a flood of texts about her discovery as she listens and explores the music of the world with a detail only the SR1-a can give her.

In my hobbyist opinion, the SR1-a are simply incredible, and I encourage any enthusiast to try them. Especially now that there are so many ways to amplify them at lower cost.

A huge thank you to @RAAL-requisite for continuing their innovation and making these extraordinary windows into the musical experience. It may not even have occurred to Raal that they have made a great headphone for those with cochlear implants, but it is that realization that motivated me to share this post.

Happy Listening.

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What a touching and heart felt story.

Open baffle headphones really has it’s place and I’m hoping @RAAL-requisite sees this and considers bringing a more affordable model to market. It’s really one of the great stories on what music could bring joy to us all.

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I whole-heartedly agree with your assessment of the Raal Requisite SR1a “earfield speakers”. After sampling many TOTL headphones, I have found them to be my absolute favorite by a large margin. I use the Raal HSA-1B amplifier to drive them and feed them with the dCS Bartok DAC.

Timbre Explanation

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We’re on the same page!

The HSA-1b is amazing, and also great for planars and efficient speakers. As part of my process of looking for monogamy, I owned the HE6 and Susvara. The HSA1-b absolutely owned them. Amazing.

But it is $$$$ and what I love about Raal is that they have introduced more affordable ways to use the ribbons vs the HSA-1b and the earlier speaker interface which required a good amplifier. Early on the SR1a was in the e-stat type of situation which required a “system” approach at expense. Even if it was still less than a good e-stat system. And I love a good e-stat. They just never got timbre right for my ears vs. the Raal.

Anyway, it is nice to write with another ribbon lover and it is a great time to get into these for sure.

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