The Technics SB-F1 is an iconic, ultra-compact 2-way monitor speaker that was launched in 1978. Despite its modest dimensions (only the size of an A5 paper), this model is known in the audio world for its innovative housing, made entirely of cast aluminum. Key specifications Housing: Cast aluminum (clamshell design with central pull bolt). System: 2-way closed system (Linear Phase design for optimal time coordination between drivers). Drivers: 10 cm woofer (rigid paper cone) and a 13 mm horn tweeter. Load capacity: 40 Watt RMS (60 Watt peak music power) at a nominal impedance of 8 Ohms. Frequency range: 50 Hz to 20,000 Hz. Sensitivity: 86 dB/W/m. Dimensions & Weight: 21 x 11.8 x 12.6 cm (H x W x D) and 2.3 kg each. Pictures are all original of this lot and part of description! Signs of use here and there but nothing major or affects performance of the speakers.