Specifications:

• Type: Active studio monitors
• Manufacturer: Yamaha
• Model: HS 4
• Equipped with: 4.5" woofer, 1" tweeter
• Power: 20 W + 20 W (THD 0.1 %, 1,000 Hz, RL = 6 Ω)
• Frequency range: 83 - 20,000 Hz (+/- 3 dB) / 60 - 22,000 Hz (-10 dB)
• Crossover frequency: 3,200 Hz
• Max SPL: 102 dB
• Switches: Room Control (0 / -2 / -4 dB below 500 Hz), High Trim (+2 / 0 / -2 dB above 2,000 Hz)
• Other Features: Volume control on the front
• Line inputs (left monitor): 2 x Combo XLR / 6.3 mm jack, 2 x RCA, 1 x 3.5 mm stereo mini jack
• 2x Terminal blocks on both monitors for mutual connection
• Dimensions: 150 x 240 x 213 mm (left monitor) / 150 x 240 x 203 mm (right monitor)
• Weight: 3.7 kg (left monitor) / 3.1 kg (right monitor)
• Colour: Black

In the box:

• Studio monitors 
• Anti-slip pad
• Stereo mini RCA cable
• Monitor L/R connection cable