{"id":6735964635254,"title":"GRS 8PR-8 8\" Poly Cone Rubber Surround Woofer","handle":"grs-8pr-8-8-poly-cone-rubber-surround-woofer","description":"\u003cp\u003eThe GRS 8PR-8 8\" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.\u003c\/p\u003e\u003cp\u003eKey Features\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePolypropylene cone for perfect balance of stiffness, mass, and self-damping\u003c\/li\u003e\n\u003cli\u003eButyl rubber surround ensures high excursion and long term durability\u003c\/li\u003e\n\u003cli\u003eStamped steel frame keeps components in perfect alignment\u003c\/li\u003e\n\u003cli\u003eOptimized motor features high-energy ceramic ferrite magnet, vented pole piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe GRS 8PR-8 8\" woofer features a polypropylene cone and a rubber surround to produce smooth response with outstanding damping. Thanks to its carefully optimized parameters, this driver is ideal for use in sealed-box speaker applications giving it a high degree of compatibility when used as a replacement speaker—it provides excellent performance in new designs, as well.\u003c\/p\u003e\u003cp\u003eProduct Specifications\u003c\/p\u003e\u003cp\u003eNominal Diameter:\t8\"\u003c\/p\u003e\u003cp\u003ePower Handling (RMS):\t65 Watts\u003c\/p\u003e\u003cp\u003ePower Handling (MAX):\t90 Watts\u003c\/p\u003e\u003cp\u003eImpedance:\t8Ω\u003c\/p\u003e\u003cp\u003eFrequency Response:\t40 to 5,000Hz\u003c\/p\u003e\u003cp\u003eSensitivity:\t85dB 2.83V\/1m\u003c\/p\u003e\u003cp\u003eVoice Coil Diameter:\t1.5\"\u003c\/p\u003e","published_at":"2022-06-30T13:03:29-04:00","created_at":"2022-06-30T13:01:52-04:00","vendor":"kjdElectronics","type":"","tags":[],"price":1994,"price_min":1994,"price_max":1994,"available":true,"price_varies":false,"compare_at_price":1999,"compare_at_price_min":1999,"compare_at_price_max":1999,"compare_at_price_varies":false,"variants":[{"id":39719687422070,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"K773","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"GRS 8PR-8 8\" Poly Cone Rubber Surround Woofer","public_title":null,"options":["Default Title"],"price":1994,"weight":1361,"compare_at_price":1999,"inventory_quantity":2,"inventory_management":"shopify","inventory_policy":"continue","barcode":"844632088520","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/292-428_HR_0.default.jpg?v=1656608512"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/292-428_HR_0.default.jpg?v=1656608512","options":["Title"],"media":[{"alt":null,"id":22046822563958,"position":1,"preview_image":{"aspect_ratio":1.0,"height":600,"width":600,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/292-428_HR_0.default.jpg?v=1656608512"},"aspect_ratio":1.0,"height":600,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/292-428_HR_0.default.jpg?v=1656608512","width":600}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eThe GRS 8PR-8 8\" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.\u003c\/p\u003e\u003cp\u003eKey Features\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePolypropylene cone for perfect balance of stiffness, mass, and self-damping\u003c\/li\u003e\n\u003cli\u003eButyl rubber surround ensures high excursion and long term durability\u003c\/li\u003e\n\u003cli\u003eStamped steel frame keeps components in perfect alignment\u003c\/li\u003e\n\u003cli\u003eOptimized motor features high-energy ceramic ferrite magnet, vented pole piece\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe GRS 8PR-8 8\" woofer features a polypropylene cone and a rubber surround to produce smooth response with outstanding damping. Thanks to its carefully optimized parameters, this driver is ideal for use in sealed-box speaker applications giving it a high degree of compatibility when used as a replacement speaker—it provides excellent performance in new designs, as well.\u003c\/p\u003e\u003cp\u003eProduct Specifications\u003c\/p\u003e\u003cp\u003eNominal Diameter:\t8\"\u003c\/p\u003e\u003cp\u003ePower Handling (RMS):\t65 Watts\u003c\/p\u003e\u003cp\u003ePower Handling (MAX):\t90 Watts\u003c\/p\u003e\u003cp\u003eImpedance:\t8Ω\u003c\/p\u003e\u003cp\u003eFrequency Response:\t40 to 5,000Hz\u003c\/p\u003e\u003cp\u003eSensitivity:\t85dB 2.83V\/1m\u003c\/p\u003e\u003cp\u003eVoice Coil Diameter:\t1.5\"\u003c\/p\u003e"}

GRS 8PR-8 8" Poly Cone Rubber Surround Woofer

Product Description

The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround. It performs admirably in sealed-box speaker applications.

Key Features

  • Polypropylene cone for perfect balance of stiffness, mass, and self-damping
  • Butyl rubber surround ensures high excursion and long term durability
  • Stamped steel frame keeps components in perfect alignment
  • Optimized motor features high-energy ceramic ferrite magnet, vented pole piece

The GRS 8PR-8 8" woofer features a polypropylene cone and a rubber surround to produce smooth response with outstanding damping. Thanks to its carefully optimized parameters, this driver is ideal for use in sealed-box speaker applications giving it a high degree of compatibility when used as a replacement speaker—it provides excellent performance in new designs, as well.

Product Specifications

Nominal Diameter: 8"

Power Handling (RMS): 65 Watts

Power Handling (MAX): 90 Watts

Impedance: 8Ω

Frequency Response: 40 to 5,000Hz

Sensitivity: 85dB 2.83V/1m

Voice Coil Diameter: 1.5"

SKU: K773
$19.94 $19.99
Maximum quantity available reached.

Thiele-Small Parameters

Resonant Frequency (Fs) 52Hz

DC Resistance (Re) 7.58Ω

Voice Coil Inductance (Le) 1.09mH

Mechanical Q (Qms) 4.77

Electromagnetic Q (Qes) 1.45

Total Q (Qts) 1.11

Compliance Equivalent Volume (Vas) 0.76ft³

Maximum Linear Excursion (Xmax) 3mm

Materials of Construction

Cone Material Poly

Surround Material Rubber

Magnet Material Ferrite

Mounting Information

Overall Outside Diameter 8"

Baffle Cutout Diameter 7.32"

Depth 3.44"

# Mounting Holes 4

Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)

Sealed Volume 0.81ft³

Sealed F3 54Hz

Vented Volume 5.54ft³

Vented F3 29Hz