JBL DD6700 specification.
Description Dual 15″ (380mm), three-way, floorstanding speaker designed for a superlative listening experience
Frequency Response 29Hz – 60kHz (half space); 45Hz – 60kHz (anechoic)
Recommended Amplifier Power 500 watts
Sensitivity (2.83V @ 1m) 96dB
Nominal Impedance 8 ohms; 5.0 ohms @ 80Hz; 3.0 ohms @ 40kHz
Crossover Frequencies (Hz) 150Hz (LF1 6dB/octave) 850Hz (LF2 24dB/octave) 20kHz (UHF 24dB/octave)
Ultrahigh-frequency Drive Components 1″ (25mm) pure-beryllium compression driver
High-frequency Drive Components 4″ (100mm) pure-beryllium compression driver
Low-frequency Drive Components Dual 15″ (380mm) three-layer, pure-pulp sandwich/foam core cone woofer
Height 43.7” (110.9 cm)
Width 38” (96.5 cm)
Depth 18.5” (47 cm)
Weight Weight: 313 lb (142.1 kg) / Shipping Weight: 383 lb (173.9 kg)
Finishes Rosewood or Maple
The lowest bottom frequency is 45Hz (anechoic). It is like bookshelf bottom end!