Dali IO Faq

GENERAL QUESTIONS
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Why did we not use LDAC?
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LDAC(SONY) is not currently supported by the Qualcomm BT
chipset(aptX), also LDAC is not supported by many devices
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Are the rubber surround and voice coil extraordinary (or standard) for a
headphone?
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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.
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What does "free edge" paper fibre cone mean? Why is this only
mentioned in specs?
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"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"
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If "circumaural" basically means "over ear", why don't we just say "over
ear" instead of both in specs?
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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
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Dali IO Specifications

General

Bluetooth	Yes
Noise Cancellation	Active Noise Cancellation (ANC)
Driver Size	50 mm
Frequency Response	10 Hz - 20 kHz
Sensitivity	100 dB
Bluetooth Version	5.0
Bluetooth Codecs	SBC, AAC, aptX, aptX HD
Charging Time	2.5 Hours
Cable Length	1.2 m
Type	Over-ear
Connectivity	Wireless, Wired
Microphone	Built-in
Wired Connection	3.5 mm