When comparing Superlux HD 668B vs Bluedio T4, the Slant community recommends Bluedio T4 for most people. In the question“What are the best headphones?” Bluedio T4 is ranked 44th while Superlux HD 668B is ranked 111st. The most important reason people chose Bluedio T4 is:
These headphones should last you quite a while, as they are built well. The hinges and the headband adjustment are made of metal, with sturdy plastics on the earcups. These should survive being thrown into a bag and minor drops without issue.
Specs
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Pros
Pro Good sound quality with nice, full bass and lively highs
The low end is powerful and punchy, adding a lot of thump to the music. Explosions from movies and games really stand out. Hip hop and EDM genres will also work well with these headphones.
Highs are forward, so audio details can easily be appreciated.
The mids on the other hand are recessed, which results in a V-shaped sound that many consider to be fun-sounding.
Pro Wide sound stage
The semi-open design results in a wide and natural sound stage. Combined with the great sound imaging, these headphones can give an immersive audio listening experience.
Pro Soft and comfortable on the head
The ear pads and headband are cushioned with thick foam which can help give a comfortable listening experience.
Pro Cable can easily be changed
Connected to the left ear cup is a 3.5mm breakaway male jack, where you can attach a 3.5mm female to male cable. Changing and replacing cables should be easy because of this feature.
Pro Comes with two headphone cables
It comes with a 1-meter cable and a 3-meter cable out of the box. Not only does this give you the option as to the the cable length that suits your needs, but you also have a spare cable available in case one gets damaged.
Pro Great build quality for the price
These headphones should last you quite a while, as they are built well. The hinges and the headband adjustment are made of metal, with sturdy plastics on the earcups. These should survive being thrown into a bag and minor drops without issue.
Pro Fairly neutral sound
The sound is on the neutral side instead of boosted bass or highs. Overall the sound has good clarity with okay details on the treble along with tight and low-end. The mids are slightly recessed though.
Pro Okay noise cancelling performance
You won’t easily hear engine noise and the like. The active noise cancelling is quite effective at filtering out low-pitched, droning noise.
Pro Can function as Bluetooth or wired headphones
You can continue using these headphones even when the battery runs out. Aside from Bluetooth connectivity, these also come with a USB Type C to 3.5mm cable, so these can be used as wired headphones. You won’t get active noise cancelling without battery power though.
Cons
Con Clamping force can be a bit too tight
While this is somehow mitigated by the thick foam on the ear pads, users who are sensitive to clamping pressure will very likely find these to be a little too firm.
Con Highs can be harsh
The highs are clear and forward, but at times can also be too much. The sound can get fatiguing to listen to, especially if the user is sensitive to treble.
Con Feels flimsy
The 668B's build is primarily made of plastic, and the fit and finish is not that great. You will hear and feel a lot of rattling and the plastic will flex often. These are budget headphones and it shows in the build quality.
Con Heat can build up quickly around the ears
The vinyl material that covers the ear pads may feel soft and comfortable on the skin, but it also traps heat pretty well. Heat can build-up quickly around the ears, which can be uncomfortable for most.
Con You’ll still hear high pitched noise clearly
You may still hear high pitched noise like female voices and sudden bursts of laughter. The noise cancelling is not very effective at filtering mid to high frequencies.