This is a good amp for the price. Can easily compete with amps up to at least 1000 euros. Sound is more engaging and enjoyable than the good, but more sterile Topping family competitors. Thing I noticed is that the front switch doesn't really turn it off (it still keeps drawing about 3 watts), with the back switch it turns really off. Also this on/pre/pha switch can cause serious DC offset peaks, at least on the XLR-outs, which can be a serious issue with certain power amps driving speakers (Singxer needs to be turned on first and turned off last to prevent issues). Not sure if this is only my unit (btw I didn't put jumpers on the power supply protection circuit).

The R8 Mk2 arrived yesterday in perfect condition and my initial impression (even with burn-in just starting) is, that it is very good and that it is an improvement over my M7S (can't wait to see where this goes to when burn-in is finished

This is a good amp for the price. Can easily compete with amps up to at least 1000 euros. Sound is more engaging and enjoyable than the good, but more sterile Topping family competitors. Thing I noticed is that the front switch doesn't really turn it off (it still keeps drawing about 3 watts), with the back switch it turns really off. Also this on/pre/pha switch can cause serious DC offset peaks, at least on the XLR-outs, which can be a serious issue with certain power amps driving speakers (Singxer needs to be turned on first and turned off last to prevent issues). Not sure if this is only my unit (btw I didn't put jumpers on the power supply protection circuit).

Singxer SA1 is the best preamp for my headphones! It delivers 6 watts in class-A. Deep and rich soundstage. Happy customer - great Magna service!

The RJ45 Isolator connected. Ethernet cable runs via TP Link over the 230 volt line in the house. Clearly an audible difference! Deeper bass, gossamer finer, tighter highs and so there seems to be more dynamics. Less garbage in is also less garbage out, right. As far as I'm concerned, successful. Costs anything but the final improvements are always the most expensive. ;-)

In all my listening the main benefits of the DI20HE became very clear: detail, coherence, wide and deep stereo image. It is also definitely an upgrade in terms of noise and background (black). Fantastic three-dimensional soundstage. This upgrade is significant for my USB source! Many thanks!

I continue to enjoy my Singxer SDA 6 Pro 2. The DAC is clearly more resolving than my other DAC and deserves more publicity.

Mijn oude DAC was defect en dus had ik snel een nieuwe nodig. Het concept van de Singxer SDA-6 PRO2 leek mij interessant. Ik had eerder een Dac met een ESS-chip. Ik luister vooral naar klassieke muziek via de satelliet. De ontvanger ontvangt een AAC-signaal en levert PCM 48kh. Omdat er geen audiofiele satellietontvangers bestaan, wordt het digitale signaal via de DI-20 van Audio-GD opnieuw geklokt en ontkoppeld aan de DAC geleverd. Voorheen via BNC. Toen ik de Singxer SDA-6 PRO2 zo aansloot, werd het signaal ernstig verstoord. Er waren geen problemen met Tos-Link. Dezelfde storing via AES werd gehoord. Ook andere apparaten kon ik zonder problemen aansluiten. Er lijkt een synchronisatieprobleem te zijn met de DI-20. Nadat ik verbinding had gemaakt via de I2S-kabel, was alles erg goed. Zelfs de fouten met AES en BNC verdwenen zodra de twee apparaten via I2S werden gesynchroniseerd. Nu luister ik via I2S en ben enthousiast over de Singxer SDA-6 PRO2 met de DI-20. Vooral via een koptelefoon lijkt de muziek natuurlijker en ontspannender dan voorheen. Ik ga dus niet meer terug naar mijn oude toestel.

This is a amazing headphone amp. Very high resolution and wide stereo image. Sound is stunning in XLR output to my Focal Clear MG. I am very pleased with this amp. My previous Musician Andromeda headphone amp is ver y good, but this one go"s much farther in all. a very satisfied owner off the Master 19.

I doubted for a long time whether the ESS DAC would not be the analytical one for me. Jos assured me that this is by no means the case with Audio-GD. Finally ordered and now a few weeks in my possession. I listen through my Audeze LCD-2. Wonderful combination! Tight and deep low and sparkling high with voices that are rock solid. Thanks, great purchase!

The sound quality separation , vocals etc has surpassed anything I have ever heard. I'm so happy with the serene , it's a delight to use and I could play the music for endless hours.

The Singxer su6 tagled your equipment up to a much higher level. Especially if you're playing with a Nucleus, Nuc or Rhein z1 you certainly have to meet this sensational SU6 . Stronly recommended i’ve you like timing; rythm and refined heights. I’ts you’re number One choice.

After 200 hours of burning in, DI20he sounds amazing! Thank you so much for your great recommendation!!

I am really impressed by the sound quality, with my Hifiman HE1000 stealth it is incredible to hear each single instrument separated, placed in its black sphere and each sphere placed in the lateral space and in depth. It is a truly holographic representation and the leap compared to my Hifiman Serenade is evident, in the next few days I will try it with all my other headphones.

A substantial improvement was felt after the first 24 hours of continuous operation. The bass area has improved and the detail here is already much bigger and deeper. Now it's probably close to 100 hours of burn-in and I can judge at its true value. The improvement has exceeded my expectations. Not in the "small" area, on the contrary ! It's so big

I love my Holo Audio system. They now have had the required burn-in and they sound fantastic. It a major upgrade. Thank you for the great support.

Straight out of the box the Serene pre-amp sounded fantastic and as a bonus the XLR1 out used as a headphone amp sounded also very nice. An incredible improvement over the the Audio-GD M1 pre-amp. Much bigger difference than I thought it would be. So far I'm really happy with the pre-amp! :-)

Best DDC I have ever had! The 10Mhz Master Clock input is a big plus. Lot of other features like spdif input and reclocker onboard. The display could be a bit more modern , I am ok with it.

Le DI20HE est exceptionnel ! Très réactif aux changements de câbles : c'est bon signe. Plus de détail, mais sans être agressif car tout en douceur. La matière est là également, et associé à la dynamique très significative, le résultat est très vivant. Et pourtant entre un gros steamer et un très bon DAC (APL), le gain est incroyable. Merci à Magna pour la rapidité de livraison, et surtout à JOS pour sa patience pour régler quelques soucis avec un Lumin A1.

I compared DI-20HE with Gustard U16, strongly modified Singxer SU-1, Singxer SU-6. Definitely Audio-GD is the best among them. The best structure/order on soundstange (feeling that everything is corret compared to another devices, sound is the most natural), great resolution and sounds are the most filled. Worth to spend money on it, better to wait and buy it.

Das Gerät ist fantastisch. Erst jetzt erkennt man wahrhaftige Instrumente, die Bässe spielen nuancierter man hört jedes Detail und eine gewisse Magie verbreitet sich im Raum. Die LAN Aufbereitung spielt eine grosse Rolle

The amplifier- 4.5 stars. Very good class A . Sound wise I find it more enjoyable when compared to A90. Price/quality ratio is great with SA1. Measurements are also excellent (see ASR for Amir review). Magna Hifi service- 10 stars. Excellent pre and post sale customer service from Rob and Jos. My SA1 had an issue with power protection. I was promptly resolved. Based on my experience I strongly recommend Magna HiFi.

Fantastic preamplifier for an unprecedented low price! This is my best hi-fi purchase in recent years.

Fantastic device! And really happy with the delivery as well.

This is my first "proper" AMP (I had a dragonfly before) and it just makes the music so engaging, lively and fun to listen to compared to some other amps I tried, even ones at twice it's price point. Also worth mentioning is that the staff at Magna have been great to me this whole time, there were a lot of delays due to Singxer but Rob and Jos were always honest with me and quick to respond to questions.