| Model ID | IRS II |
| Form Factor | Floorstanding |
| Signal Path | Analog Hardware |
| Dimensions | Midrange/Tweeter Panels: 90"x40"x??" Bass Columns: 90"x18"x18" (HxWxD) |
| Weight | 1500lbs |
| Frequency Response | 16Hz-32kHz ±2dB |
| Tweeter (Front) | EMIT* (x24) (PN 902-5086) |
| Tweeter (Rear) | EMIT*(x12) (PN 902-5086) |
| Midrange | EMIM** (x12) (PN 902-0012) |
| Woofer | 12" Polypropylene Cone (x6) |
| Impedance | 4Ω |
| Recommended Amplifier Power (Midrange/Treble) | 100-500W |
| Bass Amplification | 1.5kW (20dB Servo-Feedback) |
| Crossover Points | 70Hz (Variable), 5kHz (Bass-Midrange: 60Hz-120Hz Adjustable) |
| Horizontal Dispersion | ±2dB in 180° |
| MSRP (1981) | $22,000 |
| Connections | - Input · Binding Post (Universal)
|
| Controls | - Tweeter Level · Rotary Pot
- Bass Low Pass · Rotary Pot
- Low Pass Variable Damping · Rotary Pot
- Woofer Level · Rotary Pot
- Input Impedance · Rotary Switch
- Woofer Phase · Toggle Switch
- Servo Bass · Toggle Switch
|
| Notes | *EMIT (ElectroMagnetic Induction Tweeter)
**EMIM (ElectroMagnetic Induction Midrange)
Requires Reference Standard Crossover |
