The JBL Quantum 650 uses an over-ear fit and a closed-back design, which helps with passive sound isolation during use. It weighs 331.5g and comes with a detachable, tangle-free cable, making it easier to manage and store. The headset includes stereo speakers and does not feature RGB lighting.
The JBL Quantum 650 covers a standard 20Hz to 20,000Hz frequency range across its two drivers, each measuring 50mm, with an impedance of 32 Ohms. It supports spatial audio for a more dimensional sound experience and provides passive noise reduction to help limit ambient interference during use. Active noise cancellation is not included, and the drivers do not use neodymium magnets.
The JBL Quantum 650 includes a single built-in noise-canceling microphone that helps reduce background sound during calls and gaming sessions. The microphone is not removable, so it remains attached to the headset at all times.
The JBL Quantum 650 is powered by a built-in rechargeable battery rated at 45 hours of battery life, and a battery level indicator lets users keep track of remaining charge at a glance. The battery is not removable, so the headset needs to be charged in place rather than swapped out.
The JBL Quantum 650 connects via 3.5mm, USB, or Bluetooth 5.3, and can be used wirelessly with a maximum Bluetooth range of 10 meters. It is compatible with PC, PlayStation, and Nintendo Switch, and supports USB Type-C for wired connections. None of the advanced Bluetooth audio codecs are supported, including aptX, aptX HD, aptX Adaptive, aptX Low Latency, AAC, LDAC, LDHC, LE Audio, or Auracast, and the headset does not offer NFC pairing or fast pairing functionality.
The JBL Quantum 650 can be used as a headset and includes an on-device control panel for managing settings directly from the headset itself, though there is no in-line control panel on the cable. It supports multipoint connectivity for up to two devices simultaneously, allowing users to stay connected to more than one source at a time. The headset does not include a vibration function, and the listed warranty period is 0 years.