Using a REV33 Pro 310 Moss with Sennheiser HD 239 Headphones produces a cleaner sound, a TrueSound™, that is less fatiguing to your hearing so the symptoms of temporary tinnitus, headaches and ear ringing are dramatically reduced. Allowing you to listen for longer!

The REV33 is a passive device that inserts between the source and your headphones. REV33 allows music to pass from the amplifier to the headphones unaltered, but resists the flow of unwanted electrical energy from the headphones back into the audio circuitry.

When the electrical noise and distortions are managed, there is a dramatic increase in sonic clarity, coupled with a reduction in the symptoms that can lead to hearing damage or loss, even in the most dynamic of performance environments. Free from the unwanted noise and distortions you can hear your True Sound™ with unsurpassed clarity.