Raal Requisite SR-1A

Discussion in 'Headphones' started by Zhanming057, Dec 31, 2018.

  1. Zhanming057

    Zhanming057 Almost "Made"

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    I am a little skeptical about these "one-off" designs that made it into production, but I'm happy to give the benefit of the doubt. Beside the K1000 and the two pairs I have, they seem to be the only other fully open design on the market, and I would love to hear one.

    Any idea whether Kurada would ship out a loaner for review?
     
  2. Zhanming057

    Zhanming057 Almost "Made"

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    [​IMG]

    It's happening!
     
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  3. Zhanming057

    Zhanming057 Almost "Made"

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    I guess I should say a couple words about the production version, now that they've arrived. They come in a extraordinarily large and heavy Pelican case. Opinions might differ but I like the Pelican's functionality over a presentation box. The case is so sturdy that I wouldn't hesitate to check it on a flight.

    Comfort is a massive improvement from the (already pretty nice to wear) prototypes. The headband was tweaked and now it feels just right, as if it actually wants to stay on your head. The headband and "security" strap have both been lengthened, a point I brought up a couple times with Danny. The extra length is great because you can buy a hole punch yourself and customize the length of the straps as needed. Both parts (along with just about everything on the headphone) is user-replaceable.

    I do a bit of leather work myself and I definitely want to explore the idea of making my own headband. Not that there's anything wrong with the one from Raal, but it would be pretty cool to have a real Cordovan leather strap for these.
     
  4. Thenewerguy009

    Thenewerguy009 Friend

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    Your impressions are tempting me to try out the headphone, but man, the $3000 Benchmark ABH2 was the baseline minimum they used to power it.

    Is there nothing under $1,500 that can do them justice?
     
  5. Zhanming057

    Zhanming057 Almost "Made"

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    Power-wise these will be just fine on any amp with more than 150w at 4 ohms. You don't need a super-amp for them, but of course they'll benefit from better amps. The AHB2 is simply what they used to do most of the development for the SR1A and just about has enough power for them, nothing more .

    I've had reasonably good experiences with the SR1A's with the NAD C368 (be careful about the ungrounded negative speaker taps though), the Hegel H190, and the Peachtree Nova 300. All three are less than $2,000 used and the C368 is ~$600 used.

    The idea behind the SR1A's is that they're first and foremost a production tool for high-end recording studios, that also happen to be excellent audiophile headphones. And studios will be putting them on all sorts of stage and professional-use amps, some of which are going to be pretty cheap. The headphones are arguably less sensitive to poor amps than regular cans, feed them enough watts and they won't complain much.
     
    Last edited: Feb 8, 2019
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  6. Bill13

    Bill13 Rando

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    Suggest for your consideration, a candidate amp for driving the RAAL SR1As.

    Stereo amp utilizes the compact class-D Hypex NCore NC502MP twin Channel Module with self-contained power supply (uses usual 120/240 VAC).

    I currently use Hypex Ncore amps (NC400 modules, 400W 4ohms) to drive my DIY speakers using RAAL 140-15D ribbon tweeters with passive crossover. IMO, Hypex gives best sound I've heard - conclusion after having heard many different amps including high-end tubes & solid-state.

    In any case, RAAL ribbon treble quality is among the very best, IMO. That's a big reason why I'm interested in RAAL SR1a headphones.

    Hypex Ncore amps have been/are considered by many (me included) to be finest class-D available (as always, opinion is subject to debate, of course).

    Hypex NC502MP is Rated 2X500watts into 4 ohm loads. According to spec sheet (from spec sheet 2ohm output power graph and doing calc: (I rms = sq rt(Prms /Rload), the Hypex NC502MP outputs up to 15 amps into 2 ohms(!), & remarkably, is unconditionally stable into a 2 ohm load.

    One may think that an such an amp based on the SOA NC502MP two-channel module would be very expensive, but there's an eBay seller near me here in N. New Jersey -- currently listing Hypex NCore NC502MP based amp in enclosure case with apparently good quality in/out connectors, power cord, etc. for $825 -- but can get optional upgrades, like extra $30.00 for Cardas panel mount RCAs.

    If I decide to purchase the RAAL SR1a headphones, may likely go with this amp.
     
  7. Zhanming057

    Zhanming057 Almost "Made"

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    [​IMG]

    There was a time when I thought that I'd never get to try a 300b amp with the SR1A's...

    ...and then there's the Thrax Spartacus, which dumps out 50wpc at 8 ohms through a whopping 12 EML 300b tubes and has more current than solid states with 3-4x the rated output. And yes, the combination had a damn magical midrange. Practical? No. Do I now want one? Yes.
     
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  8. Zhanming057

    Zhanming057 Almost "Made"

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    While Raal/Requisite is going to (officially) miss out on Canjam NYC due to scheduling conflicts, I've decided to bring the production version of the SR1A's to Canjam NYC and then figure it out from there. Send me a PM if you want to give these a spin - the best would be to actually give me a phone number.

    I'm going to give Benchmark a call tomorrow to see how they feel about me just staying for an hour or two at their booth with the SR1A's plus the AHB2+DAC3 on Saturday. They've been pretty helpful to Danny and Alex in the past and I don't want to overstay my welcome. Otherwise, maybe the Schiit booth might have a Vidar. They'll definitely have a Rag which is underpowered, but not severely so.

    I can't bring an amp myself, and if anyone here has anything man-portable that's powerful enough, if would be great if you can bring it over. I'm not expecting it though.

    I'll be around all day Sat, and Morning on Sun. I should note that this 100% my decision to help out folks here, and not related to Raal Requisite and should not be interpreted as an official event demo. Basically don't be mad at Danny or me if it doesn't work out or if my Amtrak is really late or something.

    I'll also have the Mysphere 3.2 with me, which should be a lot easier to actually demo on anything. Might be an easier option than the official demo session at the Woo booth.

    [​IMG]

    BTW, this photo is actually from me and not from Raal's photographer in Serbia - people keep asking me why I'm posting official photos from the company...
     
  9. Garuspik

    Garuspik Tovarisch Ukrainian Terminator MOT - Verum

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    This thing is so weird in the most Hi-End meaning of this word.
     
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  10. Taverius

    Taverius Smells like sausages

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    Tell someone not in the hobby that you want to buy a set of speakers that you hang from your face, I've never seen someone so baffled :p
     
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