DALI IO-4

Both headphones have been tuned almost identically, so you won't hear any noticeable difference.

IO is already connected to other player. Turn off the IO and try again

The device is not in pairing mode. Check the status LED is blinking blue

This can happen if the power button get toggled ON/OFF/ON too quickly. Try turn the headphone off( listen to the voice saying "power off", and restart the headphone

USB audio is only supported by computers: Win & Mac

The Battery level LED have a "trafic light" behaviour under use: Green= more than 50%, orange 25-50%, red 10-20%, flashing red below 10%. However, During charging the Battery LED indicator is just two stage: Orange= charging. Green = fully charged ( more than 90%)

The Battery level management has some tollerance, so even a fully charged battery may indicate 90%. you shouldnt worry.

On the IO-6 the ANC chip is also the amplifier and it almost uses the same energy regardless if ANC is ON or OFF. So Battery life of IO-6 is always around 30 hrs.

We considered it but after doing a user study decided not to do this as most people won’t use it and prefer the normal way of pairing BT devices ( what they are used to)

The IO will remember up to four devices

No, the IO’s only support one BT connection at the time.

The D/A convertion is handled by the front-end BT chip. On USB it’ll support 32kHz, 44.1kHz, 48kHz, 96kHz.

The 3,5mm cable is just a straignht stereo cable. In passive mode ( OFF or with empty battery) play back will work, just as any passive headphone.

The Multi-button( logo on the right hand cup) controls Play/Pause, skip track, take call, and it held down it’ll activate Siri/ google assistant.

Windows 10 default Bluetooth setting is ”Allow the computer to turn off this device to save power”., please untick this setting.

Make sure that the ear pads are mounted correctly, if not tightend fully there will be a leak between the driver and the earpad which will result in reduced noise isolation, ANC and Bass performance.

Using headphones while wearing glasses, may introduce a leak not allowing the earpad to make a close seal around the head. A leak will result in reduced noice isolation , ANC and bass level. It depends on the individual design of the glasses frame whether a leak is introduced or not.

During take off in some aircrafts, the low frequency noise level may exceed the ANC capability of the IO-6, this will be heard as a ratling sound. The IO-6 have 4 built in ANC microphones which are all individually calibrated to the IO-6. Due to the tollarance between these microphones the Noise level at which the ANC capability is exceeded, may vary sligthly from IO-6 to IO-6, but also vary slightly for Left and Right channel.

No, charging the battery when connected to PC and listening via USB does not harm the battery, but simply tops up the battery to ensure there is battery charge available for when you take your headphones with you.

LDAC(SONY) is not currently supported by the Qualcomm BT chipset(aptX), also LDAC is not supported by many devices

The driver construction in the DALI IO is quite unique in this headphone segment. However similar headphone driver types can be found but typically in much more exotic and expensice headphones.

"free edge" basically means that the drive unit has a rubber surround suspension on the paper cone exactly like a normal loudspeaker. Typical headphone drivers are "fixed edge" types where the whole diaphragm is "flexing"

Over-ear is the normal describtion where as circum-aural is the correct technical description. For On-ear headphones the correct technical description in supra-aural

At the moment we have not planned an app as we are unsure of which value it would add, and there are not many settings were it would make sense to change it.

It is a Qualcomm solution in order to run aptX, the exact chipset details we cannot disclose.

They are available at Richer Sounds

The IO have Class 1 support