30/09/2025
For sale! PreOwned
If you meant Klipsch R-51M (passive), here are the specs:
Frequency response: 62 Hz – 21 kHz ±3 dB
Sensitivity: 93 dB @ 2.83 V / 1 m
Power handling: 85 W (continuous) / 340 W (peak)
Nominal impedance: 8 Ω compatible
Crossover frequency: ~1,660 Hz
Drivers: 1″ aluminum LTS tweeter with 90°×90° Tractrix horn + 5.25″ spun-copper IMG woofer
Dimensions (H × W × D): 13.3″ × 7″ × 8.5″ (338 × 178 × 215 mm)
Weight: 11 lbs (5.0 kg) per speaker
Enclosure: Bass-reflex, rear-firing port, MDF cabinet
If instead you meant Klipsch R-51PM (active / powered), here are those specs:
Frequency response: 68 Hz – 21 kHz ±3 dB
Dynamic bass extension: 49 Hz @ 35% volume
Maximum output: 107.3 dB SPL
Total system power: 120 W (60 W per channel) continuous, 140 W peak
Drivers: 1″ aluminum compression driver with 90°×90° Tractrix horn + 5.25″ copper-spun IMG woofer
Crossover frequency: 1,663 Hz (passive)
Inputs: Bluetooth, phono/line (with ground), RCA analog, 3.5 mm mini-jack, USB, optical
Output: single RCA for subwoofer
Dimensions (H × W × D): ~13.3″ × 7″ × 9.12″ (33.8 × 17.78 × 23.16 cm)
Weight: 10.6 lbs (4.8 kg) per unit
Enclosure: MDF, bass-reflex, rear port
Price 30,000