Description
The Sennheiser RS 220 is an open-back circumaural headphone operating with a digital wireless transmission system. It comes with a dedicated transmitter, responsible for converting and transmitting the audio signal to the headphones without going through a wired connection.
The RS 220 transmitter offers several types of inputs: a digital optical input, a digital coaxial input and an analogue audio input. This variety of connections allows it to be linked to different sources, whether they deliver a digital or analogue signal. The digital wireless transmission aims to reproduce an uncompressed signal, close to what a high-end wired headphone offers.
The headphones adopt an open-back design, an architecture that allows air to circulate through the capsules and promotes an airy listening sensation. The materials used in its construction were chosen to ensure a level of comfort suited to extended listening sessions.
This model is aimed at home hi-fi listening enthusiasts who seek the freedom of movement of wireless headphones without giving up a carefully crafted sound reproduction. The open-back design intends it for use in a quiet environment, typically for music listening or watching at home, rather than on the move or in a noisy place.
Technical specifications
| Frequency response | 16 Hz to 22 kHz |
| Sensitivity | 106 dB (1 kHz, 1 Vrms) |
| Signal to noise ratio | typ. 90 dB |
| Total harmonic distortion | typ. < 0.1 % (1 kHz, 100 dB SPL) |
| Connections | analogue RCA, digital coaxial RCA, digital optical TOSLINK |
| Power supply | 2 rechargeable NiMH batteries (HR03, AAA type, 1.2 V) |
| Weight | approx. 329 g (with rechargeable batteries) |
What to check before buying used
On the RS 220, the ear pads and padded headband are the first elements to check: they compress and crack over time, which affects the comfort and acoustic seal of the open-back headphones. Also check the pairing between the headphones and their transmitter, as well as the charging quality on the station, since the internal battery may have lost some of its capacity. Finally, test the transmitter's various inputs (optical, coaxial, analogue) to rule out any connection issues.
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