Product details: Total power output: RMS 10W x 2 +10W x 2 + 25W x 2 THD + N: 10% SNR: ≥90dBA Frequency response: 68Hz - 20kHz +/-3dB on reference axis Frequency range: 50Hz - 23kHz -10dB Crossover frequencies: 135Hz -10dB Distortion: ≤0 0.5% Input sensitivity: 800mV±50mV Audio output: Bass expansion for outboard subwoofer Speaker unit: Treble: 19mm silk dome, Magnetically shielded, 4Ω Midrange: 2¾ inch (70mm), Magnetically shielded, 4Ω Bass: 4 inch (116mm), Magnetically shielded, 6Ω Power supply: Input 100V-240V AC, Output 20V/60W DC Dimension: 140mm x 413mm x 189mm (W x H x D) Conditions for Returns 1.The product must be unused, unworn, unwashed and without any flaws. Fashion products can be tried on to see if they fit and will still be considered unworn. 2.The product must include the original tags, user manual, warranty cards, freebies and accessories. 3.The product must be returned in the original and undamaged manufacturer packaging / box. If the product was delivered in a second layer of Techsoi packaging, it must be returned in the same condition with return shipping label attached. Do not put tape or stickers on the manufacturer box. 4.Before returning a mobile / tablet, the device should be formatted and screen lock should be disabled. The iCloud account should be unlocked for Apple devices. If a product is returned to us in an inadequate condition, we reserve the right to send it back to you.