Syba Sonic SD-DAC63106 Stereo 3 Band Tone Control Pre-amp and Headphone Amplifier

Works great and loudness switch helps thin recordings sound fuller. Tone controls also allow some tweaking of poor recordings. I have no issues with the knobs, they work fine and aren't slippery. I use this unit with Drop HE4XX headphones.

Very average product. Way overpriced. The tone controls are very limited in terms of what they add and, at most levels, the resulting coloration in the signal sounds awful. Build quality is acceptable. The unit is very small. The supplied cables are poor. Was expecting so much more from this but was so disappointed that I returned it for a refund. Not recommended. Avoid.

war zuerst etwas skeptisch, doch nach dem einstecken.... sehr überrascht. die regler lassen sich sahnig einstellen, kein gekratze oder ähnliches. würde ihn wieder kaufen. lautstärke top.befeuere damit einen qc15 von bose. hab also die lautstärke am note 4 auf volle pulle, damit der druck stimmt und am mixer nicht mal auf halb und es ist absolut laut genug. auch die klangregelung ist für mich top. ist aber wie immer geschmack sache

Shipped supper fast. I needed this as a simple way to add a tone control preamp between my DAC and power amp. Makes for a super small and hi performance system. And I get a headphone amp as well. Performance is great...I bench tested the tone response and noise and distortion...all very good, as advertised.

This product does everything advertised and more. It is an excellent headphone amplifier providing bass, midrange, and treble compensation along with smooth loudness compensation that brings sound to life! Also has line output so it can be used inline with powered speakers to provide tone compensation. Does not add any noise or hum into the signal path.