| Model ID | NS-690 MkII |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 34.9 × 62.9 × 31.1 cm (W × H × D) |
| Weight | 59.4lbs |
| Frequency Response | 35Hz-20kHz |
| Treble | 30mm Soft Dome (Part #JA-0509B) |
| Midrange | 75mm Soft Dome (Part #JA-0701B) |
| Bass | 300mm Cone (Part #JA-3060) |
| Sensitivity | 90dB/W/m |
| Impedance (Nominal) | 8Ω |
| Crossover Frequencies | 800Hz, 6kHz |
| Crossover Slope | 12dB/Oct (Second Order) |
| Recommended Amplifier Power | ≥30W |
| Power Handling (RMS) | 40W |
| Power Handling (Peak) | 80W |
| Enclosure Type | Acoustic Suspension |
| Fundamental Resonance Frequency (f₀) | 40Hz |
| Controls | - Treble Level · Rotary Pot
- Midrange Level · Rotary Pot
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