I’m selling a used pair of Sterling Audio MX3 active studio monitors in excellent, fully functional condition. 

This highly affordable near-field monitoring setup is popular for desktop mixing and home editing suites. 

Sterling Audio MX3 Powered Studio Monitor Pair (Black)Condition: Excellent / Like New (Mint cosmetic condition, fully tested, no cone damage or wear)

Core Specifications 

• Driver Configuration: 2-Way Active System 
• Low-Frequency Driver: 3" acoustically engineered woofer cone 
• High-Frequency Driver: 3/4" silk-dome tweeter with neodymium magnets 
• Power Output: 40 Watts total (Class A/B amplification; 2 × 20 Watts) 
• Frequency Response: 55 Hz - 22 kHz 
• Total Harmonic Distortion (THD): 0.3% 
• Crossover Frequency: 5,000 Hz 
• Enclosure: Bass Reflex with rear port design (reduces low-frequency turbulence) 
• Finish: Dual matte black and polished ebony

Inputs, Outputs, and Controls 

• Main Inputs: Unbalanced RCA inputs 
• Front Access: 3.5mm TRS stereo input (for Auxiliary sources like smartphones) 
• Headphone Jack: 3.5mm TRS front-mounted headphone out (mutes the speakers when connected) 
• Controls: Front-mounted volume and power (push/pull or rotary) with backlit Sterling logo

Included Cables:

• Power Cable: Standard AC power cord (connects the active "Left" speaker to the wall) 
• Speaker Link Cable: 1/8" (3.5mm) TS or proprietary connector to link the Active (Left) monitor to the Passive (Right) monitor 
• Audio Input Cable: RCA to 3.5mm cable (for connecting to a smartphone, PC, or standard audio interface) OR dual RCA to dual RCA cable