{"product_id":"on-stage-ha4000-4-channel-pro-headphone-amplifier","title":"On-Stage HA4000 - 4 Channel Pro Headphone Amplifier","description":"\u003ch3 data-end=\"277\" data-start=\"172\"\u003eCompact Personal Headphone Amplifier With High Output Power For Loud, Clear Monitoring – On-Stage Headphone Amp\u003c\/h3\u003e\n\u003cp\u003eThe On-Stage Headphone Amp is a compact, reliable personal headphone amplifier built for musicians, vocalists, and audio professionals who need loud, clear monitoring in live, rehearsal, studio, or silent practice scenarios. Its high-output amplifier (up to 200 mW per channel) drives any headphones powerfully—even high-impedance models—ensuring every detail is heard without distortion, while the stereo\/mono switch and auxiliary input allow mixing in backing tracks, metronomes, or external sources for versatile use.\u003c\/p\u003e\n\u003ch6 dir=\"auto\"\u003eBattery Powered and Easy To Use\u003c\/h6\u003e\n\u003cp dir=\"auto\"\u003ePowered by a 9V battery or optional DC adapter, it offers true portability without cables or outlets, and the rugged metal chassis with rubber feet withstands stage knocks and floor placement. Simple knob control keeps operation intuitive, making it ideal for drummers, keyboardists, guitarists in silent practice, live monitor mixes, schools, churches, or any situation requiring private, high-quality headphone monitoring.\u003c\/p\u003e\n\u003ch6\u003eFlexible Monitoring\u003cbr\u003e\n\u003c\/h6\u003e\n\u003cp\u003eStereo\/mono switch and aux input enable custom mixes; high power ensures clarity even in noisy environments.\u003c\/p\u003e\n\u003ch6\u003ePortability \u0026amp; Durability\u003c\/h6\u003e\n\u003cp\u003eBattery operation for off-grid use; tough metal build protects against gig wear and tear.\u003c\/p\u003e\n\u003cp data-sourcepos=\"8:1-9:633\"\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-sourcepos=\"8:1-9:633\"\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-sourcepos=\"8:1-9:548\"\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003cp data-sourcepos=\"8:1-9:548\"\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eKEY FEATURES: On-Stage HA4000 - 4 Channel Pro Headphone Amplifier\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Output Power\u003c\/strong\u003e: Delivers up to 200 mW per channel for driving any headphones loud and clear, even high-impedance models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStereo\/Mono Switch\u003c\/strong\u003e: Selects stereo or mono monitoring for flexibility in live or rehearsal use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary Input\u003c\/strong\u003e: 3.5 mm stereo aux in for mixing external audio (e.g., metronome, backing tracks) with main signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery \u0026amp; DC Power\u003c\/strong\u003e: Runs on 9V battery (included) or optional 9V DC adapter (not included) for portable or fixed setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLevel Control\u003c\/strong\u003e: Independent volume knob for precise personal monitoring without affecting others.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Build\u003c\/strong\u003e: Durable metal chassis with rubber feet for stability and protection on stage or floor.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"On-Stage","offers":[{"title":"Default Title","offer_id":57223380336975,"sku":"HA4000","price":32.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0891\/3344\/9551\/files\/HA4000_1024x1024_6860bf95-4d54-4ff4-9aa4-cdd81bf63bad.webp?v=1779037115","url":"https:\/\/www.audiodirect.co.uk\/products\/on-stage-ha4000-4-channel-pro-headphone-amplifier","provider":"Audio Direct","version":"1.0","type":"link"}