BASS / UNCHANGED
The low-frequency shape passes through. The part that makes Porta Pro fun remains intact.
01EQ
SYSTEM-WIDE CLARITY CORRECTION / KOSS PORTA PRO / macOS
KOSS
EQ TOOL
KEEP THE BASS.
LOSE THE BLANKET.
PORTA PROSTEREO / ON-EAR
A small menu-bar EQ that opens up Koss Porta Pro headphones without flattening their characteristic warmth.
GET KOSS EQ TOOL ↗- PRICE
- PAY WHAT YOU WANT
- SYSTEM
- macOS 14.4+
- CHIPS
- APPLE + INTEL
ONE PURPOSE.
THREE DECISIONS.
CLARITY / +4 dB
A broad presence lift makes speech, music, and everyday listening feel less dark.
AIR / +1.5 dB
A restrained high shelf adds openness without turning the headphones thin or sharp.
03 / CONTROLON.
ON.
OFF.
DONE.
The correction runs across your Mac. No preset browser, no account, no audio application left open in the background.
- CLARITY
- +4.0 dB / 4 kHz
- AIR
- +1.5 dB / 9 kHz
- HEADROOM
- −4.5 dB
EQ / SYSTEMKOSS EQ TOOL01
PROFILEOPEN, STILL WARM
THREE STEPS.
- 01MOVE TO APPLICATIONS
Open the disk image and drag Koss EQ Tool to Applications.
- 02APPROVE FIRST LAUNCH
This community build is not yet Apple-notarized. If macOS blocks it, use Privacy & Security → Open Anyway.
- 03ALLOW SYSTEM AUDIO
Turn the EQ on and allow System Audio Recording once. Processing stays on your Mac.