Sennheiser  RS-65 Wireless RF Circumaural Headphones with SRS Surround Sound Processor (Black)
The worst sounding headphones I've ever used.
Sound quality is a personal matter, and one should bear that in mind when reading the following remarks.  With that being said, the Sennheiser RS-65 did not measure up to my criteria.<br />Being in the market for a pair of wireless headphones, I thought I could not possibly go wrong purchasing something with the \\"Sennheiser\\" name on it; after all, they have a long and distinguished reputation as being a maker of excellent quality, great sounding headphones.   Surely their RS-65 phones would meet or exceed any expecations I had concerning sound quality and overall performance.   Unfortunately, I was in for a rude awakening.<br />To cut to the quick: of all the headphones I've ever used in my entire life, these, by far, are the worst sounding pair I've ever listened to; even including the dinky little headphones that come with the \\"Walkman\\" type personal stereo systems.  I was unpleasently surprised by just how horrible they were.  <br />On a positive note, the RS-65's do work as advertised.  They have very good range (I could get a signal everywhere in my house, even in the basement.) and the static and hiss that comes with any sort of wireless product isn't all that bad.  They are very light weight, and made of very sturdy plastic.  These might be a useful product for people who like to listen to talk radio while doing yard work, or for those who need to watch TV without bothering other people nearby.  <br />Unfortunately, there are also many bad points to these headphones, so many that I found myself returning them after just a couple hours use. Here's my evaluation in more detail:<br />SOUND QUALITY: For me, this is the most important trait of any audio product, wireless or otherwise.  The RS-65's simply did not measure up to my moderate standards.  No matter what type of music I played, classical, jazz, rock, etc.; the sound was rather muffled and a bit distorted.  The highs are just about non-existant; this is especailly noticable with cymbals --they become almost invisible when listening through the RS-65's.  There is a lot of bass produced by these headphones, but almost all of it is extremely muddled and very distorted.  It is nearly impossible to make out individual notes, the bass sounds like just a bunch of distorted thumps --bass drums sound like they are wrapped in cotton guaze.  Vocals and midrange are also very disappointing, especially female vocals --vocalists sound like they are singing inside a cardboard box.    <br />Also, though it isn't mentioned in the docucmentation, the RS-65's do have some sort of line leveling when it comes to volume.  When listening to a classical piece that has some quiet passages insterspersed with some very loud brass and percurssion, the RS-65's somehow cut the volume, so that the loud portions came out sounding rather unimpressive.<BR> <BR>RECEPTION: Since the RS-65's are wireless, their ability to receive a signal from their transmitter under a variety of conditions is of vital importance.  For the most part, the RS-65's perform well, but there is static and hiss that are an always present reminder that these are a wireless product.  When walking around opposed to sitting, one encoutners a variety of \\"snap, crackle and pops\\" that can be very distracting.  The static and hiss seems to increase around electrical appliances, especially personal computers.  The static and hiss also increase as you walk away from the transmitter into different rooms, or outdoors.   There is also a noticable increase in static when using the headphonse during the day as opposed to night time.  If you like to listen to LOUD music, the hiss and static won't be all that noticable. However, if you like classical or accoustic music, it can be rather annoying, especailly during quiet passages.<br />COMFORT:  The RS-65's are surprisingly light weight, but the design of the ear piece is rather bizzare.  They are quite small, and don't fit over an adult's ear very well.   After just a few minutes listening, Ifound my left ear throbbing in pain as the ear piece sort of \\"crushed\\" my ear against my skull.  Needless to say, despite their light weight, I found them very uncomforatable to wear.<br />OVERALL:  In an attempt to make some sort of comparison, I purchased a pair of [cheaper]Sony CDR-280 corded headphones to see how they stood up to the Sennheisers.  There really wasn't much of a comparison, the Sony's were superior in most every way, except for the fact that they are attached to a wire.  However, having heard such superior sound from the CDR-280's, I decided to keep them and sent the Sennheisers packing.  <br />My search for decent sounding wireless headphonses continues...