Headphone amplifier Omnitronic LH-030, 3.5 mm jack, 100 mW output

The Omnitronic LH-030 is a compact headphone amplifier with a 3.5 mm jack and a 100 mW output designed to raise the audio level and improve signal clarity for small-form-factor devices. Its low-profile housing and single-jack connection make it convenient for connecting smartphones, tablets, DJ controllers, laptops and portable audio players to standard headphones, delivering a louder and cleaner personal monitoring signal without complex setup.

Advantages

The LH-030 provides a straightforward method to increase headphone volume and reduce distortion at higher listening levels. Its 100 mW output offers sufficient power for most consumer and pro-consumer headphones, while the compact size preserves portability and ease of placement. Simple plug-and-play operation ensures quick integration into mobile and home audio chains, and the solid mechanical design ensures reliable contact and durability for repeated use.

Suitable for

• Mobile listening with smartphones or tablets
• DJ previewing and cueing on compact controllers
• Home and small studio headphone monitoring
• Portable audio setups and field monitoring

Key specifications

• Output connector: 3.5 mm headphone jack
• Rated output power: 100 mW (into typical headphone impedance)
• Form factor: compact, low-profile inline amplifier
• Power source: internal battery or host device powered (check device compatibility)
• Intended use: single-channel headphone amplification for personal monitoring

How to use

Insert the LH-030 into the audio output of your source device using the 3.5 mm jack, then connect your headphones to the amplifier's output. Adjust the source device volume to a moderate level before increasing the amplifier output if the unit provides a level control. For equipment without a dedicated level control on the amplifier, set playback volume on the host device and use the amplifier primarily to provide additional headroom and cleaner signal at higher listening levels.

Usage recommendations

Use the Omnitronic LH-030 with headphones that match common consumer and pro-consumer impedance ranges for optimal performance. Avoid driving low-impedance studio monitors or expecting high-power amplification for large, power-hungry headphones. For extended portable use, monitor device battery levels and disconnect when not in use to preserve power.