Naturally wonderful

Many headphones are tuned with certain high frequencies emphasized in order to make the music sound more vivid. The downside of this approach is that other ranges sound cloudier by contrast. final tuned the E4000 without emphasizing those same high frequencies, aiming instead for a natural sound signature.

Taming the low end

The low-end characteristics of the E4000 is created by combining an acoustic resistor and an L-shaped acoustic chamber. These components achieve a balance between the volume of low frequencies and the overall clarity of the headphones. 

Unique swing-fitting earpiece mechanism 

With their swing fit mechanism, the earpieces can be swung left and right and tilted towards the audio canal for a perfect fit. The sound is transmitted directly to the eardrum, ensuring clear sound.

Machined aluminum housing  

Unlike the plastic housing of cheaper headphones, the rigid machined aluminum housing of the E4000 suppresses unnecessary vibrations. An aperture on the back of the housing extends the reproduction band of low frequencies, while a filter has been applied inside the aperture to prevent sound leakage.

Ear hooks that eliminate cable touch noise

The E4000 uses an ergonomically designed ear hook that accommodates a vast range of ear shapes and sizes. The design also alleviates cable touch noise, the rustling sound that occurs when the cable rubs against your body.

Product highlights

• 6.4mmφ dynamic driver unit
• Ear tips that come in 5 sizes – SS/S/M/L/LL
• MMCX connectors 
• Silicon carry case
• Unique swing-fitting earpiece mechanism
• Machine aluminum housing
• Ear hooks that eliminate cable touch noise

Specs

• Housing: Aluminum black alumite finish
• Driver: 6.4mm dynamic
• Connectors: MMCX
• Cable: OFC
• Sensitivity: 97dB
• Impedance: 15Ω
• Weight: 18g
• Cord: 1.2m

What’s included 

• E4000 IEM
• Silicone carrying case
• Ear pieces (Type E, 5 sizes)
• Ear hooks
• Carabiner 

Apos Promise

• Free Standard Shipping
• Price Match Guarantee
• Apos One-Year Transferable Warranty
• 45-Day Return