Where is the control?
The Valco app currently available to customers does not offer EQ controls. Sound on the VMK25 and VMK25.2 is adjusted using the equalizer built into your phone, computer, or playback app.
The menu name and location vary depending on the device and app version. Look in settings for EQ, equalizer, sound, or playback. On some devices the adjustment affects all audio; on others it applies only to one app. Check the app description before you start suspecting the headphones or your hearing.
Safe starting point
Listen to a familiar track with the EQ set to neutral.
Change only one band at a time.
Make small adjustments of 1 or 2 dB at a time.
Compare before and after at the same volume level.
If the sound distorts or becomes fatiguing, reduce the boost.
You can get more bass by lifting the low frequencies slightly. Speech can be made clearer with a moderate mid-range boost. Sound that is too harsh can be tamed by lowering the high frequencies a little.
A broader explanation of frequencies and the current status of the upcoming app can be found in the article What is EQ and how do you adjust it?.
If the sound has changed without any EQ adjustment
First check the listening mode, Bluetooth pairing, and the seal of the ear cushions. If the problem continues, use the guide for the correct model:
Do not use the reset guide for the wrong model. The outer shell looks the same, but different electronics live inside.
The upcoming app in brief
A Valco app with EQ features is in development and available for internal testing, but it is not ready. No release date or final feature list is promised yet. The steps in this article work with the tools currently available to customers.
