The Pro-Ject headbox II makes a solid and above all high-quality impression. All connections gold-plated, solid (and heavy - 600g) metal housing, RCA input and PREOUT RCA output. Sonically I've nothing to complain about, a slightly warm touch I would certify him, punchy and dynamic to appropriate headphones - not less than 30 ohms. The datasheet I gather a slightly trimmed frequency range, high-quality headphones could down deep and the highs even slightly higher, but as we come then already in the border areas that you do not hear anyway. Neat shielded, external power supply, I can turn on the Pro-Ject until it stops, not a shred of noise or sönstigen noise. One hears nothing.
You can hear but very demanding headphones something too little volume - concretely found on Sennheiser HD 600 with its 300 ohms at just below average efficiency. However, this is more the exception, dr HD 600 is more extreme in the relationship. At AKG K-601 that was not an issue, which is of slightly warm sound character of the Pro-Ject the way to shame.
Yes, there are probably better / more powerful headphone amplifier, but at the price falls me not. From 175, - to open up and I did not want to spend.
