Out of the box RebelAmp is very warm and spacious, but in time you will realize it does not appear to be very powerful, nor detailed specially with smooth DACs like Qtest, so how do we fix it?
1st. get a pre-amp (you can also use a normal headphone as pre-amp). I use an Archel Pro that I had around the house with volume at 9-10 o'clock with Qtest, while Neo iDSD runs at -20-ish DB.
2nd. turn RebelAmp all the way to the max volume. The volume pot cuts away quite a few details so we need to get rid of it.
3rd. Leave the rebel amp ALWAYS ON. At start it is a little harsh, but after a few days, it will become completely smooth AND detailed.
With this setup you will get a very powerful detailed and smooth amplifier. It has more then enough power to PROPERLY dirve non-stealth Arya. (for nor Arya users, yes those are really a bitch to properly power).
Do I still recommend RebelAmp? 100% YES. Even if you factor in the pre-am cost, it is still has an outstanding sound and for the money.
It can easily be an end game for everyone who will not go for insane headphones, and that is really more then 90% of audiophiles.

Very nice piece of equipment. Adds a bit warmth and forwards a notch the mid-highs /highs. The rebel amp powered my Hifiman HE6 SE, almost as good as Violectric V550, which is at least 3-4 times more powerful, and >2k EUR in price. Big thanks to Rebel Audio team. Looking forward and hope to see a balanced amp in future.

This is the best sounding amp I've ever heard hands down. I used to be in love with tube amps over solid state, but the class A magic adds so much magic to the sound in a way that most amps cannot achieve. It also has enough power for just about anything you could put on it. I genuinely hope to see more products from Rebel Audio whether that means more amps, or even just more colorways. (A yellow RebelAmp would be amazing).

All the reviews are correct. It is great.

Thank you for an easy purchase. I feel so bad for you guys. Good luck to all of you!

Tom

I have had the Rebel Amp for a couple of weeks now. I have been through a dozen or so amps in the last couple of years and the Rebel Amp is a keeper. It is detailed, spacious and fluid sounding. I am using this with a Lynx Hilo and it is much more enjoyable to listen to than the built in headphone out. The Rebel Amp is a good compliment to the Hilo's strong technicalities and sounds great with my Clears, HD600s and HD650s. It is lush without being overtly warm and detailed without being fatiguing. I ordered this amp at the beginning of May 2022 and it arrived in North America two weeks later. Artem and team are continuing to make and ship these amps. Count me as a happy customer.

Made all my headphones sound better

They really lend dynamics and clarity and space to my HD800.

This RebelAmp creates refined quality sound. It performs at about $900 yet costs much less. The only real competition to this amplifier is the Schiit Jotunheim 2 which has more power and more input output flexibility. However, in real world application, the RebelAmp has more than enough power for even my HifiMan He6SE V2. Thank you for this wonderful amplifier Rebel Audio!!!

I find myself wanting to try all of my headphones on this amp so I can see how it enhances them in different ways. I'm no audio guru but I must say that it sounds clean but with a nice cozy jacket. It is not warm like tubes or clean like a AAA 789. It is in a wonderful middle area. I enjoy it for gaming and music. Excellent amp!

Simply love it. Hooked it up with my DT1990. Mind was blown! I'm not an expert, just a fan.

Bought this out of curiosity after hearing it’s basically a dual rail version of the legendary AMB M3 amp. This is prob the best amp I’ve heard under $1k. It leans a bit towards the brighter side of neutral so I paired it with a vintage theta progeny dac to add a little more bass heft. Soundstage is decent for a solid state, but the best thing about this amp is definitely how dynamic this thing is. Macro and micro dynamics are outstanding, especially at this price point. Compared to my ragnarok 2, rebel amp is lacking the bass slam the former has, but I’m hearing things in the recording I wasn’t hearing before with the rag 2. This amp is definitely staying in the collection.

Build quality is great, although slightly large. Power button is on the back, so there may be some issues with turning it on and off if you place it in a rack. The knob is superb, no scratchiness at all, very satisfying to roll.Rebel just sounds a “musical” to my ears with a little warmth and tight bass,and smooth delivery. The RebelAmp takes away harshness and sharp edges without losing details. With 1W of Class A power, it powers 99% of headphones out there, other than the rare exception such as the HE6. Overall after some burn in, it's been a great experience, for $500 it punches way above its price range and I would recommend it to anyone that wants a great amp that doesn't break the bank.

The RebelAmp is magical. Highs are rich and refined. Mids are holographic. Bass is controlled with ample headroom. I thought I was buying a $500 amplifier however it outperforms $800 amplifiers. Absolutely breathtaking performance. I love my RebelAmp. There is nothing like it at this price point. Your search is over. Get the RebelAmp.

RebelAmp blew me away. For the price tag it has, it punches way higher. It really does have that awesome Class A magic. Such a pleasure to listen, it just sounds really musical and smooth.