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Deep black over-ear headphones with padded cups and foldable headband

Timbuk2 A9-1 Over-Ear Headphones 75h 40mm 3.5mm

SKU CH-KSGJ-Y6X0J

Over-ear Bluetooth headphones with 40 mm drivers, three EQ modes, 75-hour battery and a 3.5 mm wired backup option

  • TypeOver the Ear
  • ColorDeep Black
  • Driver Unit60 millimeters
  • THDOver Ear
  • Connector3.5mm
  • Ear Couplingover_ear
  • Immersive 3D stereo sound from 40 mm drivers
  • Three EQ modes tailor audio to pop, bass or vocal styles
  • 75-hour battery life with 3.5 mm wired backup
  • Dual-device Bluetooth pairing switches between phone and laptop
  • Built-in HD microphone for clear hands-free calls

Over-Ear Headphones with 75-Hour Battery

Timbuk2 A9-1 headphones are over-ear wireless headphones built for daily commuting, office work, study and long trips. They offer up to 75 hours of playtime on a single charge and include a 3.5mm audio cable for wired backup when the battery runs low.

Bluetooth Wireless Limits and Wired Backup

The headphones connect wirelessly via Bluetooth and support simultaneous pairing with two devices such as a phone and laptop. When wireless range or battery life becomes a constraint, the included 3.5mm cable provides a direct wired connection for uninterrupted listening.

Check Device Compatibility and Port Availability

Verify that your source devices support Bluetooth audio and multipoint pairing if you plan to switch between two devices. Ensure at least one device has a 3.5mm headphone jack if you intend to use the wired backup mode.

Highlights

  • Immersive 3D stereo sound from 40 mm drivers
  • Three EQ modes tailor audio to pop, bass or vocal styles
  • 75-hour battery life with 3.5 mm wired backup
  • Dual-device Bluetooth pairing switches between phone and laptop
  • Built-in HD microphone for clear hands-free calls

Specifications

BrandTimbuk2
ModelA-9, A9-1
Part NumberA9-1
TypeOver the Ear
ColorDeep Black
Driver Unit60 millimeters
THDOver Ear
Connector3.5mm
Ear Couplingover_ear
Noise Cancellingnone
Wireless TypeBluetooth
Battery75 hours
Operating Time75 hours
Featuresnone, 5.4, 75 hours, Button Control, push_button, Wireless, Over Ear, dynamic_driver

Questions about this item

Which driver size gives the best sound — 40 mm or 60 mm?

The headphones use 40 mm drivers for 3D stereo sound with three EQ modes, while the specifications also list a 60 mm driver unit; the larger figure may reflect a different measurement basis.

What does the 75-hour playtime mean for daily use?

Up to 75 hours of wireless listening on one charge; actual time varies with volume and content, and a 3.5 mm cable is included for wired backup when the battery runs low.

What does the 3.5 mm connector allow?

A 3.5 mm audio cable is supplied for wired listening when the battery is flat, and the headphones also connect wirelessly via Bluetooth for two devices simultaneously.

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