You have switches for volume up/down, power/Bluetooth, forward track, back track, pause and call. It also acts as a hands-free speakerphone via its one mic. It uses Bluetooth 4.1 A2DP and supports multi-point connection to two devices and can hold up to eight devices in memory. Total Harmonic Distortion at full volume is <3% – it is noticeable, and you need to turn it down a notch when you start to hear distortion from its 40mm drivers. Maximum volume (claimed) is 92dBPL (decibel pressure level) which is roughly equivalent to 70db loudness. Plantronics aims for a balanced sound signature as it allows you to ramp up the bass or ramp down bass and focus on clear, crisp voice depending if your Bluetooth device has Equaliser pre-sets.įrequency response it 50Hz-20,000kHz. If you play something like the Beach Boys, you want to hear the vocals, and if you play Beethoven, you want to hear the bass drums and crisp cymbals. In other words, it is okay for MP3, and it does not claim audiophile quality like aptX/HD or LDAC codecs etc.,Ī lot depends on content played. On 3.5mm audio the sound is brighter, but volume was less than Bluetooth.īluetooth uses an SBC codec (subband coding) – designed to obtain a reasonably good audio quality at medium bit rates with low CPU overheads. You can use either a wired 3.5mm connection (no amp) or a Bluetooth wireless connection (with amp). They will hold a charge for about six months. I set them at noon up playing a music loop at normal volume and checked back hourly until they ran out at 8 am. The battery takes about 2 hours to charge and depending on use and volume should give up to 18 hours playback or 16 hours talk/play. What they don’t have: NFC pairing, or auto power-offĭon’t confuse this with the lower cost Backbeat 505 that looks similar but does not have IPX2 sweat resistance. They are made from plastic and are strong enough for the purpose. The first thing you need to remember is that these are low cost – don’t expect metal bands and bling. A way too short USB-A to micro-USB charge cable.
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