If you want a simple wired headphone for mobile gaming, choose Califone EH-2; if you need wireless headphones for a compatible car or TV infrared system, choose Key Audio RP Accessories IR-601B. The EH-2 is the more straightforward fit for a phone with a 3.5 mm audio jack, while the IR-601B is built around infrared transmitters—not direct phone pairing.
Califone EH-2 vs Key Audio RP Accessories IR-601B at a Glance
• Califone EH-2 strength: A wired, in-ear design with a 3.5 mm mono plug and a replaceable 6-foot straight cord. Trade-off: It is wired, and its plug is mono rather than a standard stereo connection.
• Key Audio IR-601B strength: Over-ear infrared wireless headphones with two channels, folding storage, and three sets included. Trade-off: They need a compatible infrared transmitter, which is not included.
• Califone EH-2 is for: Someone who wants a simple wired listening option and has a device compatible with its plug.
• Key Audio IR-601B is for: Families or passengers using a compatible car or TV/DVD infrared entertainment system.
The EH-2 is a wired, in-ear headphone with a 3.5 mm mono plug. Its 6-foot straight cord is replaceable, which is a practical detail if cord wear is a concern. Its listed frequency range is 20 Hz to 17 kHz, with 130-ohm impedance and 111 dB sensitivity. Those figures describe the headphone, but they do not establish compatibility with every phone or a particular level of gaming performance.
That makes it a plausible choice for a mobile gamer whose device has a compatible 3.5 mm connection and whose setup works with a mono plug. The wired connection avoids needing an infrared transmitter, but the cable can restrict movement. The product information lists no volume control, so I would not choose it if an on-headphone volume adjustment is essential.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 6 min read · Independent comparison
Skip it if you need wireless listening, an over-ear fit, or a plug that is confirmed to provide standard stereo audio. A 3.5 mm jack alone does not guarantee that the EH-2’s mono plug suits a particular phone, adapter, or game-audio setup. Check compatibility before choosing it as a noise cancelling headphone for mobile gaming: the listed design is in-ear, but no active noise-cancelling feature is specified.
The IR-601B is an over-ear, folding infrared wireless headphone set supplied as three headphones. Its two-channel design is intended for systems with two monitors, so listeners can tune into different programs through a compatible setup. The listed frequency range is 20 Hz to 20,000 Hz. The useful feature here is not phone connectivity; it is the ability to listen wirelessly where an infrared transmitter is already part of the entertainment system.
I’d consider this set for passengers sharing a car’s rear entertainment system or for home TV listening when an appropriate IR transmitter is available. The transmitter is not included, so that system requirement matters. Folding headphones are also easier to put away between trips than a fixed, over-ear set, though the product information does not give a folded size.
For mobile gaming on a phone, the IR-601B is usually the wrong tool. Its connection is infrared, not a stated direct connection to a phone, and no phone-pairing feature is listed. It may suit a gaming setup only if that setup has a compatible IR transmitter, but that is a special case rather than a typical mobile arrangement. It is not described as a noise-cancelling model, either.
• Best fit for a wired phone setup with a compatible 3.5 mm connection → Califone EH-2. Confirm that the mono plug works with your device; the connector size alone does not settle that question.
• Best for a car’s compatible infrared entertainment system → Key Audio IR-601B. Its wireless design is meant for IR transmitters used with car TV/DVD systems.
• Best for two different programs on a two-monitor setup → Key Audio IR-601B. Its two-channel design supports listening on separate channels in a compatible system.
• Best if you want a replaceable cable → Califone EH-2. The listed cord is a 6-foot straight cable and is replaceable.
• Best if you want several matching headsets for passengers → Key Audio IR-601B. The set includes three headphones.
• Best if you want a folding design for storage → Key Audio IR-601B. Its over-ear headphones fold when not in use.
• Best for a simple wired option without needing an IR transmitter → Califone EH-2. Its limitation is the specific mono-plug connection, not a wireless-system requirement.
• Best for clip on earbuds for mobile gaming or sports earbuds for mobile gaming → neither is a clear match. The EH-2 is in-ear, but its supplied information does not describe a clip-on or sports-specific design. The IR-601B is over-ear and intended for infrared systems.
The connection type is the deciding factor. The EH-2’s cable can work for mobile play only when the phone and plug are compatible. The IR-601B provides wireless freedom within an infrared entertainment setup, but that is not the same as general-purpose wireless phone audio. Neither model is specified as noise cancelling, and neither product sheet supports a claim about gaming latency or microphone performance.
My Verdict
For mobile gaming, I would choose the Califone EH-2 only if my device accepts its 3.5 mm mono plug and I wanted a wired in-ear option. Its replaceable cord is a useful practical feature.
I would choose the Key Audio IR-601B for a compatible car or home infrared system, especially when multiple listeners or two channels matter. It is not my pick for ordinary phone gaming.
It has a 3.5 mm mono plug, but phone compatibility depends on the phone’s connection and any adapter in use. Check that the device supports the plug and that mono audio is suitable for your setup.
The listed wireless technology is infrared, and the headphones are intended for use with a compatible IR transmitter. The product information does not specify direct phone pairing.
For a phone setup that supports its plug, the EH-2 is the more relevant option because it is wired and does not require an IR transmitter. The IR-601B is better suited to compatible car or TV/DVD entertainment systems.
Neither product is specified as having active noise cancellation. The IR-601B is listed with sound isolation, while no noise-control feature is listed for the EH-2.
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