| Brand | Yamaha |
|---|---|
| Unit Type | Unit |
| Model | Yamaha NS 690 |
| Unit Quantity | 1 |
| Country of Origin | United States |
Check the listing for details. Yamaha NS 690 Woofer Alignment Tool. Condition: New, Made in United States. Listed at 45.00 USD. If your Yamaha NS-690 woofer has a stiff or frozen voice coil, chances are the magnet has shifted—a common issue due to aging factory adhesive. This is an advanced repair tool intended for users with technical experience.