Do these headphones come with the 2.5mm balanced cable, as well as the 3.5mm unbalanced?

I haven't checked out the details of balanced/unbalanced, but there were two cables of considerable (but useful) length.

What is the frequency response?

As per manufacturer, it is 5-40000 Hz

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Description

🎶 Elevate your audio game — hear what others miss!

NATURAL SOUNDSTAGE - Open-back design with acoustically transparent Kvadrat fabric for wide, airy audio
IMMERSIVE HI RES SOUND - Experience every note with crystal-clear 40kHz frequency range
VIBRATION FREE CLARITY - Double-layered ear shells reduce resonance for pure, dynamic bass
PLUG PLAY VERSATILITY - Detachable 3m cable with 3.5mm and 6.3mm adapters for seamless device compatibility
COMFORT FOR MARATHON LISTENING - Feather-light memory foam ear cups and soft headband for all-day wear

The Philips Fidelio X3/00 are premium wired over-ear headphones featuring 50mm acoustic drivers and an open-back design with Kvadrat speaker fabric, delivering high-resolution sound up to 40kHz. Designed for comfort with feather-light memory foam cushions and a soft headband, they reduce resonance via double-layered ear shells. Includes detachable 3m cable and adapters for versatile connectivity, perfect for audiophiles seeking immersive, natural sound during extended listening sessions.

Specifications

Connectivity technology	Wired
Wireless communication technology	Wired Headphones
Included components	Adapter, Cable clip, Headphones
Age range (description)	Adult
Material	Leather, Plastic
Specific uses for product	music
Recommended uses for product	indoor
Compatible devices	Devices with a 3.5 mm or 6.3 mm audio jack
Control type	Media Control
Cable feature	Detachable
Item weight	13.4 Ounces
Water resistance level	Not Water Resistant
Frequency range	40,000 Hz - 40,000 Hz
Package type	Standard Packaging
Style	X3/00
Control method	Touch
Number of items	1
Product Dimensions	12 x 24 x 32 cm; 379.88 g
Batteries	1 Lithium Ion batteries required.
Item model number	X3/00
Connector	3-M
Styling	Open Back
Material Type	Leather, Plastic
Size	One Size
Battery Type	Lithium Ion
Item Weight	379 g

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