# Dayton Audio ND90-PR 3-1/2" Aluminum Cone Passive Radiator

**Manufacturer:** Dayton Audio  
**MPN:** `ND90-PR`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Dayton Audio |
| Manufacturer name | Dayton Audio |
| Manufacturer | Dayton Audio |
| DimensionUnit | inch |
| Extra Product Name | Dayton Audio ND90-PR 3-1/2" Aluminum Cone Passive Radiator |
| UPC | 848791004834 |
| Weight | 0.25 |
| WeightUnit | lbs |
| depth | 2.39 |
| diameter | 4.07 |
| height | 4.07 |
| height_Attrib | Overall Outside Diameter |
| length | 2.39 |
| length_Attrib | Depth |
| moq | 1 |
| MPN | ND90-PR |
| multiple | 1 |
| qtyInStock | -2 |
| qtySource | FieldMap |
| SKU | 290-209 |
| snippet | Dayton Audio ND90-PR 3-1/2" Aluminum Cone Passive Radiator. Part Number: 290-209 by Dayton Audio. |
| tierMinQty1 | 1 |
| tierMinQty2 | 4 |
| tierPrice1 | 9.49 |
| tierPrice2 | 8.54 |
| width | 4.07 |
| width_Attrib | Overall Outside Diameter |
| Brand | Dayton Audio |
| Model | ND90-PR |
| Part Number | 290-209 |
| Unit of Measure | Each |
| Nominal Diameter | 3-1/2" |
| Resonant Frequency (Fs) | 53.8Hz |
| Mechanical Q (Qms) | 6.15 |
| Compliance Equivalent Volume (Vas) | 0.05ft? |
| Mechanical Compliance of Suspension (Cms) | 1.09mm/N |
| Diaphragm Mass Inc Airload (Mms) | 8.1g |
| Maximum Linear Excursion (Xmax) | 9mm |
| Surface Area of Cone (Sd) | 31.2cm? |
| Cone Material | Aluminum |
| Surround Material | Rubber |
| Basket / Frame Material | Steel |
| Overall Outside Diameter | 4.07" |
| Baffle Cutout Diameter | 3.01" |
| Depth | 2.39" |
| # Mounting Holes | 4 |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| parts-express.com | 290-209 | 9.49 | 1 | None | 1 |

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Structured data: `/python/html6/product/500/82000000/82423000/part_--ND90PR---DaytonAudio--c0a8208d68.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp