-41 4-CHANNEL STEREO HEADPHONE AMPLIFIER PRODUCT MANUAL 1
THANK YOU FOR CHOOSING POLSEN. The Polsen HMA-41 Stereo Headphone Amplifier is a compact and lightweight headphone amplifier that is ideal for studio recording, band rehearsals, or any application where multiple headphone connections are needed. The ¼-inch TRS stereo input accepts any stereo line output. The four TRS stereo ¼" headphone outputs each have their own volume control, and there is no loss of signal when all four headphones are connected.
Among the benefits you’ll enjoy: P R E C AU T I O N S • Compact and portable. Easy to use • Please read and follow these instructions and keep this manual in a safe place.
OVERVIEW 5. 1. Volume sliders 2. ¼" TRS stereo input jack 3. ¼" TRS stereo headphone output jacks 4. 2. 1. 8. 3. 4. Power LED 7. 5. 12V DC power input 6. DC 12V/150mA power supply 7. Stereo mini male to stereo mini male cable 8. 1/8" (3.5 mm) stereo mini to 1/4" TRS stereo adapter (4) 4 6.
O P E R AT I N G I N S T R U C T I O N S To use your HMA-41 follow these simple instructions: Power: Plug the 12V DC power cord into the power supply on the back panel of the HMA-41. The LED will light up. Input: Connect the output of your source with a ¼" TRS stereo plug to the input jack on the rear panel of the HMA-41. You can use output from a media player or smartphone by using the included mini-plug adapter.
S P E C I F I C AT I O N S NUMBER OF CHANNELS 4 O U T P U T I M P E DA N C E 51 Ω (per output) I N P U T C O N N E C T I O N S 1 x ¼" TRS phono master input S I G N A L-T O - N O I S E R AT I O >90 dB O U T P U T C O N N E C T O R S 4 x ¼" TRS phono headphone outputs T O TA L H A R M O N I C D I S T O R T I O N (THD) <0.008% M A X I M U M I N P U T L E V E L +14 dBV P O W E R 12V DC, 150mA M A X I M U M O U T P U T L E V E L 20 dB per channel W E I G H T 9.6 oz.
TROUBLESHOOTING Problem No sound Solution Make sure all headphones are completely plugged in. Make sure the volume levels are turned up. LED light is not lit Noise or hum Make sure the amplifier is receiving an input signal. Make sure the 12V DC adapter is plugged into the outlet, and the connector is completely inserted into the power supply on the back panel of the HMA-41. The noise might be coming from a faulty input device. Check if there’s a faulty ground in the signal chain.
O N E -Y E A R L I M I T E D WA R R A N T Y This Polsen product is warranted to the original purchaser to be free from defects in materials and workmanship under normal consumer use for a period of one (1) year from the original purchase date or thirty (30) days after replacement, whichever occurs later.
