So, what do you get?
The Bluetooth SIG (Special Interest Group), released Bluetooth 4.1 as an incremental software update to Bluetooth 4.0 on 4 December 2013. This update incorporated the Bluetooth Core Specification Addenda (CSA 1, 2, 3 & 4) in this, new features were added that improve consumer usability. Including increased co-existence support for LTE and bulk data exchange rates.
The Name Bluetooth came from the 10th-century, second king of Denmark, King Harald Bluetooth; who was famous for uniting Scandinavia just as we intended to unite the PC and cellular industries with a short-range wireless link. Copyright © 2017 IDG Communications, Inc.
Now to the Sound Quality.
Well, i really put them through their paces. Using a Benchmark test and some of my favourite listening tracks. How did they perform, well let’s see.
Please Note:- I am 57 and peoples hearing change as they get older, so this is just the results that i found with my delicate ears. The Headphones were tested with flat equalisation. Tests performed using 24-bit/96kHz FLAC on a FiiO X3 2nd edition.
Frequency response stated:- 20Hz – 20kHz. I found heard frequencies of 20Hz – 13kHz
Spectral Flatness:- Did the Headphones perform with equal volume across a full Spectral frequency sweep. The sound was centred across the full spectrum until the top end where it wavered a slightly.
Dynamic Range:- 78 dBFS (decibels below full scale).
Quality Test:- (Bass Shaker) The sweeping tone sounded clear across all frequencies. There was no parasitic buzzing or rattling, sometimes associated with lower priced headphones.
Driver Matching:- (All frequencies swept from 10 Hz up to 10 kHz. at exactly the same sound levels in both earphones) The tone mostly held it’s central position until the top end of the spectrum.
Correctly wired:- (left plays on left and right on right) perfect.
Polarity Preserved:- (wired in phase) Yes it is.
Binaural Test:- (a knock to a wooden door, first right then left) The Knocks were well defined and very lifelike.
Last but not least, I always listen to my favourite music. How does it sound? I know how it usually sounds. (Tracks used for this were as follows)
Izzy Bizu – Talking to you. Adele – Hello. Michael Jackson – She’s out of my life. 10cc – I’m not in love. Michael Jackson – Don’t stop ’til you get enough. A-ha -Hunting high and low. Gwen Guthrie – Ain’t nothin’ going on but the rent. Al Jarreau – Where in this love together. Iona – Here i stand. Patti Austin/Quincy Jones – “Betcha’ Wouldn’t Hurt Me”. Phil Collins – In the air tonight. Pink Floyd – Shine On You Crazy Diamond. Monique Miller – At last. Gino Vannelli – Black and Blue.