The Topping D90SE was a product that was recommended to me as a great DAC to look into, and so I researched and found it was a top-of-the-line (neutral) DAC. I had pursued gear more warm and detailed until now, and I thought, if I were to take the hobby a little more seriously, a neutral DAC would be just right for me.

For this review, I’ve been listening between the Schiit Modi Multibit ($269), Audio-GD’s HE-7 MK I ($3099), and Topping D90SE ($899) to gather impressions. I believe they are all great DACs that perform their function well.

While all of them do indeed have subtleties that make them similar and in some aspects, perhaps more preferable than others, I’ve discovered that in audio, the noise floor is an important concept when it comes to DACs.

When I made this website, I planned to describe subjectively what I was hearing, however, I didn’t understand that everything counts in the chain to get that clean signal to your headphones. If it sounded good to me then I would describe what I was hearing; but with some gear, I got to compare side by side to get a better sense of the sound.

I tried a few products without any kind of detailed research into sound as a science and its effects in gear. Some of the terms began to come more to life when I listened through my gear, and the musical characteristics and descriptions that I’d read about became more clear to me. It can be really fun to hear something for the first time and learn the signature.

At the date of publishing, the Topping D90SE scores one of the highest in one of the metrics known as Signal to Noise and Distortion (SINAD) at a total of 123, also known as Total Harmonic Distortion Plus Noise (THD+N). The argument on Audio Science Review is that the higher the score, the less linear distortion can be heard (i.e. audible sound that can be collectively heard by us that is different than what is produced by the pure audio signal), and is transparency at its fullest. 

As time went by, I developed an interest in the air and the intricacies within sound; neutrality and low noise floor seemed to be the best route to approach to achieve a transparent sound that could extract as much detail as possible. 

Not to my surprise, it was lovely when I first heard music with the Topping D90SE with the Feliks Audio Euforia as a preamp. It was a little too neutral coupled solely with the HD 600; but with a preamp, I was able to modify my chain, and I used the Garage 1217 Project Sunrise III and Feliks Audio Euforia to flavor the sound (which is a great way to experiment). With a preamp, I found that even with a neutral combination like the Topping D90SE + HD600, I was able to get a sufficient warmth that made me feel like I was listening to an amplified preamp, which, in any case, the sound is more enjoyable and smoother.

With the Topping D90SE, I got a sense of the noise floor; deep and spacious as expected of a neutral DAC. A preamp can help tighten up the sound where it might sound too tonally dense with some loss of detail, and loosen up some of the density for space, micro, and macro detail; it helps with the energy, doesn't really take away the weight of the notes except make it more defined, making the presentation much more enjoyable to me. 

With everything said about the transparency of the Topping D90SE, it’s become one of the DACs I use to allow me to be flexible with the sound I’m experimenting with. Being a neutral DAC with a high SINAD score, I feel secure that the sound has the least possible signal interference so that I can enjoy a transparent presentation.

In the past, the idea of neutrality didn't appeal to me, I perceived it as being flat or unmusical. I was new to the hobby and looking for an ideal warm signature. Through my research, I went after DAC/Amps like the Audio-GD NFB 15.32, which I thought was a lovely, forward-sounding, syrupy DAC/Amp. Through the D90SE, I kind of understand the appeal; it’s just as good, but we hear more detail along the way without any emphasis on the frequencies. I still believe warmer signatures like the Audio-GD NFB 15.32 are truly a blast.

The Topping D90SE is a great product, but there has been some argument on the Audio Science Review forum that the Topping D30 Pro does the job fine, and that a high SINAD sometimes isn’t necessary, since human hearing is limited beyond a certain point. The Topping D90SE has been proposed as a product that keeps the source signal as low as possible, and in a sense it’s overkill. If on a budget, perhaps the Topping D30 Pro may be worth looking into, as recommended by some at Audio Science Review. 

The Topping D90SE is a product that creates purity in signal, and so I mix it in the chain when I want the sound to be fully revealing and transparent with a low noise floor, which can be heard through the breadth of the notes; intricate, spaciously atmospheric, and masterful in shape and definition. The Topping D90SE with its high SINAD score is a DAC that does a superior job of filtering out the noise so I can enjoy a faithful music reproduction.

Switching between the Audio-GD’s HE-7, Schiit Modi Multibit, and Topping D90SE to review, I found that the Modi Multibit remained competitive, though the bump in clarity, micro and macro detail, and spacing with the D90SE makes the difference. I do believe that someone could be satisfied with the Modi Multibit, however, the clean base of the Topping D90SE provides superior detail retrieval, making the sound more transparent, dynamic, and accurate.

The Modi Multibit is a value product that sounds great for a DAC under $500, and some have claimed that it’s the best they have heard under the $500 range. I haven’t tried many in the $500 range, but what I can say from my experience with the Modi Multibit is that it is a great product that gets you high value for a low price. Soundstage, clarity, layering, instrument placement, and a neutral musicality; it’s all there with the Modi Multibit, however, still, I believe the Topping D90SE is the superior product. 

The HE-7 is softer and a bit more relaxed in the notes with a warmer sound. There is more macro-ambiance, and the notes feel like they are more spaced and all around you. It is not as intricately defined in the note detail and quality D90SE. The HE-7 has more extension in the midrange and low end, and is a more mellow DAC that sounds big, and has a creamier, little less exacting sound, and consequently it might be more musical, but it depends on preference, and the way that you enjoy music.  

The Topping D90SE is a great choice as an entry point for someone new to the hobby. I feel that sometimes the more intricate, finer details get lost in DACs without the benefit of a high SINAD score that effectively eliminates linear distortion, and that a product like the Topping D90SE, while being considered "neutral", is no less musical while providing me the incisiveness I need. The more I listen to the D90SE, I realize that detail and precision beautiful, as is layering, depth, air, and the sublime engagement a signature like the D90SE can draw with its atmosphere. Soundstage and imaging are a treat with the Topping D90SE, everything is so intricate, and it's like you can hear the sounds blooming with so much definition and shape in the cleanest way possible. 

If you can appreciate unfiltered nuance in detail and balance, a masterful presentation in neutrality, the D90SE is a gem that delivers an exceptional listening experience. It's missing some macro-dynamics when compared to DACs like the Yulong D18 or HE-7, but if pure, full detail without loss of engagement is your preference, this may be the DAC for you. The bass is thunderous and super impactful to the listening experience, and I think this can be attributed again to the base SINAD score which allows the frequencies to be transparent and shine naturally. The D90SE provides a defined, intricate note quality, where you can feel like you're suspended in space by the combination of the noise floor, soundstage, and imaging. 

I enjoy and appreciate the D90SE as a DAC that gives me a faithful representation of the music -- as it is; it's uncompromising and remains, still, undoubtedly highly musical, and fun in that way. The D90SE's base signature is airy, full, clean, and pure with highly defined note quality; it's very nimble and very resolving. It's an excellent product that provides precision and clarity in music.  I would recommend it for anyone dipping their feet in personal audio as a first DAC potential that could come about from experimenting with a statement, neutral DAC. It digs deep, and is bound to be enjoyable for any enthusiast.

Product link: https://amzn.to/3ZRZ8Q4

USB: Singxer SU-6

Sources: Audio-GD HE-7 MK I, Schiit Modi Multibit

Cables: Worlds Best Cables (RCA Neutrik, RCA Amphenol)

Amplifiers: ampsandsound Nautilus, ampsandsound Kenzie OG Rev 2