Sephia KH684 Headphones

Sephia KH684 Headphone


My Rating



  • Excellent Sound
  • 40mm Speaker Size
  • Bargain Price
  • Universal Use


  • Retro Styling
  • Cabled

The Sephia KH684 Headphones are basic wired set of headphones that can be used in any device via a 3.5mm AUX cable jack.

Simplicity is the main design with the Sephia KH684, with no in-line controls, no Bluetooth, no microphone, just a simple plug and play set of audio headphones.

These are comfortable, lightweight and built with powerful 40mm dynamic drivers.

But are they any good? What do they sound like? Time to test them out!


The Sephia KH684 comes packaged in a two-tone Black/Blue cardboard box with a clear plastic viewing window on the front.  The box measures 20.5cm x 20.5cm x 7.5cm and weighs 360G.

Sephia KH684
Outer packaging Image – Image Source – My Helpful Hints (Subject to Copyright)


When you open the Sephia KH684 box you will find: 1x Headphone, 1x AUX Cable, 1x Sephia VIP Card.

Sephia KH684
Contents Image – Image Source – My Helpful Hints (Subject to Copyright)

Sephia KH684 Headphones.

The Sephia KH684 are a 1970’s looking set of wired headphones.  You get a colour scheme consisting of Black and Brushed Steel.  They measure from ear-cup to ear-cup (Measuring from the bottom of the ear-cup and across the top of the headband to the bottom of the other ear-cup) 55.0cm and weigh 170G.

Sephia KH684
Product image – Image Source – Sephia (Subject to Copyright)

The inner headband is also movable and will fit to the contour of your head, the cable runs through this inner band.

Sephia KH684
Headband image – Image Source – My Helpful Hints (Subject to Copyright)

The Ear-Cups.

The ear cups rotate slightly and each one is heavily padded with foam and PU leather, each ear-cup measure 7.0cm x 9.0cm with a centre holed diameter of 3.0cm.  They can slide up and down on the steel band to ensure you get a fit that suits you.

Sephia KH684
Outer earcup image – Image Source – My Helpful Hints (Subject to Copyright)
Sephia KH684
Inner earcup image – Image Source – My Helpful Hints (Subject to Copyright)

The AUX cable (Which has a length of 120.0cm) insert into the 3.5mm port on the underside of the left earcup.

Sound Quality.

With a simple design and no additional extras, you might think these are poor in sound quality too.  But, they sound a lot better than they look!

The sound is nice, punchy and very clear.  You’re able to hear bass and treble tones very clearly.

The sound isolation and cancellation are also excellent with no sound leakage and any background environment noise completely blocked out!

If you’re a fan of the look of the Sephia KH684 headphone and want a simple cabled set of music headphones, then you’ll not be disappointed with the sound too.

I also noticed no sound distortion when increasing volume all the way, so you’ll be able to blow your ear drums and still the sound would be great.

Technical Specifications.

  • Brand: Sephia
  • Model: Wired Headphones
  • Model Code: KH-684
  • EAN: 5060264025831
  • ASIN: B077SN9DLV
  • Impedance: 32?
  • Sensitivity: 103dB±3dB
  • Frequency Response: 20Hz ~ 20KHz
  • Speaker: 40mm
  • Magnet: Neodymium
  • Compliance: CE, FCC, RoHS


I’m not a big fan of the overall look of the Sephia KH684.  They look too retro for my liking, but if that’s your style I’m sure you’ll be happy with these headphones.  But, I do love the audio sound that these produces, although cabled I still love the sound that these headphones produce.  Sound isolation and cancellation is also excellent!

If you want the Sephia KH684 Headphone for yourself, they’re available for purchase only on Amazon. The RRP for this product is £7.99.

Product sample provided by Sephia in exchange for a detailed, unbiased review.

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