This is the personal blog by Klaus Eulenbach. It mostly features portable audio products, reviews and editorial content. This blog uses photos with extended color space. The images are best viewed on an HDR-capable display.
qdc Neptune versus NF Audio NA1
I had planned to write a normal review on the NF Audio NA1, but I also remembered that I never really mentioned the qdc Neptune anywhere. So I thought this would be a great chance to cover them both. My focus is on the NA1, though, I want to highlight...
Impressions: Hifiman Ananda BT
I have taken part in the Hifiman Ananda BT loaner tour on Head-Fi. Thank you very much to Hifiman for giving me the opportunity to test this high quality headphone and to share my impressions. The Ananda Bluetooth (BT) sells for around 1200 € here in Germany, which is a...
Understanding RAW Frequency Graphs
First off, I should apologize because this post is long overdue. I have been sharing raw measured frequency graphs without ever explaining them. So I finally want to catch up and help with the basics and understanding how to read raw frequency graphs. Very important for anyone to know is...
InEar ProPhile 8 vs 64 Audio A18t
It is no secret that the reference-tuned InEar ProPhile 8 are one of my favorite IEMs. In my opinion, they are possibly the best set of universals on the market. I was absolutely floored when I reviewed them three years ago on Headfonics. That was just days before the 18-driver...
Frequency Response: InEar ProPhile 8
The InEar ProPhile 8 is considered to be a reference of any IEM in regards to neutral frequency response. I personally share that opinion. (Read my full-length review here.) Let’s take a closer look. Visit the official InEar website. ProPhile 8 Linear Bass SPL We have a minimal and linear...
Unboxing: NF Audio NA1
Welcome to the unboxing of the brand new NF Audio NA1 single dynamic IEM. These monitors sell for ~169 USD excl. tax, and as of right now, are rather difficult to obtain outside of Asia. I have a feeling that will change soon, though, because the NA1 tick many right...
News: Updated RME ADI-2 DAC (November 2019)
The RME ADI-2 DAC has received a silent refresh. The name remains the same. Internally, the chip by Asahi Kasei Microdevices has been updated from AK4490 to AK4493, bringing the DAC up to the latest and best in November 2019. (Well, technically we’re at AK4499 already, but that chip hasn’t...
Flavor of the Month: AZLA Horizon
May I present you my flavor of the month for October/ November? The rare to find AZLA Horizon secured the spot this time around and is making sure that the fabulous Oriveti OH500 get a little less playtime. I picked them up as a souvenir at e-earphone in Akihabara, Tokyo....
Measuring Custom IEMs
As you might have noticed, I too like to measure my IEMs and study their frequency response. Though it doesn’t tell the whole story, there is a lot of information to be found. I do think that my raw measurements of IEMs are of decent quality and can be useful...
Introducing My New 64 Audio A18t
As (kind of) announced, here they are: my new 64 Audio A18 Tzar Custom In-Ears. Top of the line. Summit-Fi. Ultra High-End. Etc. 18 freaking drivers… that is one hell of a blast radius from this bomb. I already discussed the universal version in more detail, so I want to...
Souvenirs from Japan
I am back from my holiday and I have at least a little audio content for my blog. I visited relatives in Tianjin, China, and flew to Japan from there. It was indeed an awesome trip and possibly the most fun I had all year. But I will not bore...
HD Music: What Does It Mean?
This post is meant as an introduction to HD audio and will explain the fundamentals of hearing and audio data. We live in a fast-paced world in which a lot of information needs to be processed. Rarely do we have the full understanding of a topic and many marketing teams...