| Form Factor | Part |
| Signal Path | Passive Hardware |
| Dimensions | 40.6 × 40.6 × 20.8 cm (W × H × D) |
| Weight | 34lbs |
| Frequency Response | 60Hz-15kHz |
| Treble | Constant Directivity Coaxial Horn |
| Midrange/Bass | 16" Paper Cone |
| Sensitivity (100Hz-10kHz) | 100dB/W/m (Measured in Altec 930 enclosure) |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 1.5kHz |
| Crossover Slope | Low Pass: 12dB/Oct, High Pass: 18dB/Oct (Second Order, Third Order) |
| Dispersion (Horizontal) | 60° |
| Dispersion (Vertical) | 40° |
| Compression Diaphragm Material | Aluminum |
| Resonant Frequency (Fs, Woofer) | 30.5Hz |
| Equivalent Volume Compliance (Vas) | 14.1ft³ |
| Qts | 0.17 |
| Qes | 0.18 |
| Qms | 1.8 |
| Reference Efficiency (ηo) | 6.0% |
| DC Resistance (Re) | 5.8Ω |
| Peak Linear Displacement (Vmax) | 0.13" |
| Maximum Excursion (Peak-to-Peak, Xmech) | 0.85" |
| Peak Linear Displacement (Vd) | 16.2in³ |
| Effective Surface Area (Sd) | 131.5in² |
| Effective Piston Diameter | 12.75" |
| Voice Coil Diameter (Treble) | 1.75" |
| Voice Coil Diameter (Woofer) | 3" |
| Voice Coil Wire Material (Treble) | Aluminum |
| Voice Coil Wire Material (Woofer) | Copper |
| Voice Coil Wire Geometry | Rectangular |
| Magnet Material | Ferrite |
| Magnet Weight (Treble) | 2.5lbs |
| Magnet Weight (Woofer) | 5.6lbs |
| Maximum Output | 119dB |
| Power Handling (60Hz-15kHz) | 150W |
| Finish | Dark Gray |
| Notes | High power version of 604-9K |
