SWR-8D4

These redesigned, fifth-generation Type-R subwoofers include several enhanced features to achieve even cleaner, deeper bass extension, faster, more accurate transients and even greater output capability than before.

Speaker Rating

• Max RMS Power Capacity: 350W
• Peak Power Capacity: 1000W

Extreme bass fits in more places

The Type-R Subs have been completely redesigned to offer more installation flexibility and application versatility to build the ideal sound system. At 115 mm of mounting depth for the 8” (20 cm) this new design offers even greater output capability.

More Excursion = More Output

The new FEA-Optomized Motor Structure together with our revolutionary High-Amplitude Multi Roll (HAMR) Suspension Design gives the new Type-R Subwoofers the highest X-max and SPL output in the category.

With a real-world, measured 12 mm of X-max, allow the new 8” (20cm) Type-R Subwoofers to deliver the best-in-class bass output, ultra-low distortion, and unparalleled sound quality.

More Motor Force = More Control

Starting with a new ten piece, segmented magnet structure, the new Type-R subwoofers deliver more accurate, louder and cleaner bass with even more control. This new magnet assembly is also an integral part of the next generation of Alpine’s Patented Radial Vented VC cooling system.

Keep it Cool = Keep it Playing

Alpine’s Patented Radial Vented VC Heatsink and Airflow Management System (US Patent #7,634,101) helps to minimize power compression and ensures reliable long playing time by actively eliminating output-robbing heat away from the Voice Coil. The new one-piece cast aluminum frame with integrated shorting sleeve uses the entire frame as a heatsink, to allow for sustained power output and handling, even in the most extreme of applications.

FEATURES

Diaphram

• Material:Reinforced Parabolic Cone Structure with Poly-Mica Dust Cap & Pulp-Kevlar Cone Body
• Design: 2-Piece Structural Parabolic

Surround

• Material: Injected Molded Santoprene®
• Design: High Amplitude Multi-Roll

Spider

• Material: Nomex®
• Design: Progressive Conex® Spider with Reinforced Layer Tinsel Leads

Voice Coil

• Material: 38mm Voice Coil with High-Temp
• Design: 4-Layer DVC Winding on Spiral Cut

Motor Structure

• Pole Geometry: Extended Pole Geometry
• Configuration: Compound Radius Curve

Frame

• Material: Cast Aluminum
• Design: Perimeter Vented Heat Transfer

Terminals

• Layout: One Side
• Design: Heavy Duty 10mm² Push with Housing, Banana Plug Jumper

Tinsel Leads

• Design: Reinforced Layer Spider Integration (Patent #6,810,988)

Gasket

• Design: Concealed Mount Gasket (Integrated Grille System Ready, US Pat #7,760,900)

SPECIFICATIONS

Power Handling

• RMS Power Handling: 350 Watts
• Peak Power Handling: 1000 Watts

Dimensions

• Mounting Depth: 115 mm
• Mounting Diameter: 176 mm
• Displacement: 1.4l
• Added Volume: 1.0l

General

• Nominal Impedance: 4 Ohm + 4 Ohm
• Frequency Response: 30-200 Hz