We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black and silver on-ear headphones with collapsible metal headband and open foam ear pads

Koss Porta Pro Classic On-Ear Headphones Black/Silver

SKU CH-CVG9-37ZX9

Collapsible on-ear headphones with 60 ohm drivers, 15–25,000 Hz response and 3.5 mm plug

  • Frequency range5 Hz-16 kHz
  • Impedance80 ohms
  • Connection3.5 mm
  • Wearing styleEarbud
  • Noise cancellationPassive
  • Wireless technologyBluetooth
  • Legendary sound from 15-25,000 Hz drivers
  • Iconic retro design since 1984
  • Collapsible frame with included carrying case
  • ComfortZone pads with adjustable headband
  • Universal 3.5 mm wired connection

On-Ear Headphones with 3.5mm Wired Connection

These on-ear headphones deliver sound through a standard 3.5mm wired plug, making them compatible with a wide range of devices. The 60 ohm drivers produce audio across a 15-25,000Hz frequency range. They are built for listeners who want a simple, cable-connected experience without batteries or wireless pairing.

Collapsible Frame and Carrying Pouch

The unique collapsible design allows the headphones to fold down for compact storage. A carrying pouch is included to protect the unit during transport. This combination makes the product easy to pack into a bag or pocket for daily commuting or travel.

Check Your Device Has a 3.5mm Jack

Before ordering, confirm that your source device provides a 3.5mm headphone output. Many modern phones and laptops have removed this port, so an adapter may be required. The headphones draw power directly from the connected device and do not need a separate power supply.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $63.99
Pricier than about 77% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand namePHILIPS
Model nameWFL900/H
Part numberPorta Pro
Product typeOn-Ear
Product colorWhite
Audio & video
Frequency range5 Hz-16 kHz
Impedance80 ohms
Wearing styleEarbud
Noise cancellationPassive
Mic signal-to-noise ratio60 ohm
Mic sensitivity60 ohm
Connectivity
Wireless technologyBluetooth
Ports & slots
Connection3.5 mm
Power
Power supplyNo
Compatibility
Compatible withUniversal
Supported platformsCertified for Windows Vista

Questions about this item

How often will the ear pads on the Porta Pro Classic need replacing?

The ComfortZone temporal pads are designed for extended use, but foam pads on any on-ear headphone typically compress over time and should be swapped when comfort or seal degrades.

What limits listening volume before the 60 Ohm drivers distort?

The 60 Ohm dynamic drivers reach their clean-output ceiling when the source device cannot supply enough voltage, so maximum undistorted level depends on your player's output stage.

Does the headband or cable get warm during all-day sessions?

No active electronics or battery are present, so the headband and 3.5 mm cable remain at room temperature even after hours of continuous playback.

More in Earbuds & Over-Ear Headphones

Similar items