Active speakers have a built in amplifier in one speaker and the other is a passive speaker which plugs into the active speaker. The JBL Control 2P Active Speakers great for use as bookshelf speaker Monitor Speakers Or even as PC Speakers.

JBL Control 2P

The Control 2P Compact Powered Reference Monitor System combines JBL's legendary loudspeaker design with powerful amplification to deliver rich, accurate performance for the most demanding audio applications. The compact design, rugged enclosure, and professional feature-set make the Control 2P Compact Powered Reference Monitor ideal for desk-top recording and video production, audio visual presentations, professional broadcast applications, and monitoring of electronic musical instruments.

Features

• Studio quality transducers for accuracy, and rich bass response: 80 Hz - 20 kHz
• 35 watt per-channel power amplifier and high sensitivity drivers produce exceptional output:115 db max SPL per pair
• Balanced XLR, and unbalanced RCA inputs allow connection to a range of signal sources
• Stereo headphone jack allows monitoring using headphones
• Ergonomic, side-mounted volume control - simultaneously controls left and right speakers
• High frequency adjust control - allows the user to contour HF response to application requirements
• Magnetically-shielded transducers for use near CRT monitors and magnetically sensitive equipment
• Internal peak limiter and overload protection circuit - protects the system from damage caused by continuous over-driving
• Wall-mount capable using optional mtc-2p mounting kit
• Included snap-on pedestals optimize listening angle for desk top applications

Specifications

• Frequency Range: 80 Hz - 20 kHz
• Maximum SPL Per Pair: 115 dB
• Maximum SPL Master Only: 111 dB
• LF Transducer: 135 mm (5.25 in) low frequency loudspeaker
• HF Transducer: 19 mm (.75 in) polycarbonate dome tweeter
• Crossover Frequency: 4.2 kHz
• Input Sensitivity: +4 dBu XLR 1/4"; 0 dBu RCA
• Signal Input Connectors (x2): Balanced Neutrik®* Combo XLR 1/4" TRS; Unbalanced RCA
• Amplifier Power: 35 Watts continuous per-channel
• Power Requirements: 19 V DC / 3.42 A - use only supplied power supply
• Headphone Jack: 3.5 mm (1/8")
• Dimensions: 235 x 159 x 143 mm (9.3 x 6.3 x 5.6 in)
• Net Weight Master Speaker: 2.6 kg (5.5 lb)
• Net Weight Extension Speaker: 2.2 kg (4.5 lb)
• Master Speaker and Extentsion speaker supplied in this package