出 英国TDL  TRL 3  音箱一对!  Technical Specifications
RTL3 
System
Drive Units 
- Bass Units
-Tweeter
Crossover
Frequency Range
Sensitivity
Impedance
Amplifier Requirements
Dimensions
Finish
Weight 
Reflex transmission line loading floor standing
Two 172 mm loaded polypropylene cone with forward roll rubber surround & phase plug - long throw double wound coil on kapton former with bump back magnet yoke.
19mm soft dome ferro-fluid cooled 
Electrical 2 way second order network 
35hZ-20kHz
90dB at 1m for 1 watt 
8 ohm nominal
20-120 watts per channel
900mm wide x 375mm deep
Black ash or rosewood
21Kg each