Alpine SWR-8D4 1000W Max 8 inch Type-R Subwoofer

Be the first to review this product

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.

Model: Alpine SWR-8D4
£127.99

Product Description

Details

Kevlar Reinforced Pulp Cone: This Alpine Type-R subwoofer has a two-piece structural parabolic Kevlar reinforced pulp cone. Kevlar adds strength and tear resistance to the woofer cone while maintaining the benefits of a pulp cone design. There is also an oversized inverted dust cap of the same material, which increases rigidity and virtually eliminates distortion at extreme volume levels.

HAMR: The woofer features a High Amplitude Multi Roll Surround (HAMR), made of injection molded Santoprene, that allows substantial linear excursion and greater SPL. The High-Amplitude Multi Roll Surround design allows extreme excursion without sacrificing valuable cone area. FEA Optimized for linearity and made with injection-molded Santoprene, the HAMR surround is a key part of the suspension system that allows extreme excursions with accurate, distortion-free control.

Spider with Reinforced Layer Spider Integration: An FEA optimized progressive Nomex spider with reinforced layer spider integration ensures reliable and consistent control of the tinsel-leads to eliminate any possible mechanical noises or interference typical of many high-excursion designs.

Vented VC Heat Sink and Airflow Management System: Alpine's Patented Radial Vented VC Heat Sink and Airflow Management System actively manages voice coil temperatures by forcing air directly across the heat sink system. This helps to minimize power compression and ensures reliable long playing time by actively removing output-robbing heat from the voice coil. The new one-piece cast aluminum frame with integrated shorting sleeve uses the entire frame as a heat sink, allowing sustained power output and handling, even in the most extreme applications.

Optimized Motor Structure: Thanks to its new six-piece, segmented, double stacked magnet structure, the new Type-R subwoofers have over 20% more motor force than their predecessors, offering more control over cone movement. The optimized machined motor structure also creates a symmetrical magnetic field while optimizing flux density to greatly reduce distortion, while further improving power handling and output.

Pole Geometry: Alpine's patented Compound Radius Curve pole geometry ensures a symmetrical magnetic field, while optimizing flux density to reduce distortion, while further improving power handling and output.

Oversized Voice Coil: The 40mm high-temperature (180°C), 4-layer dual voice coil offers more surface area to handle more power; 350W RMS / 1000W Peak.

Dual Voice Coils: For increased system flexibility, the woofer has two 4-ohm voice coils. When the voice coils are wired in parallel the woofer presents a 2-ohm load; when the voice coils are wired in series the woofer presents an 8-ohm load.

Spring Terminals: The spring terminals are all located on one side of the woofer. The terminals will accept pin connectors, single banana plugs, or bare wire up to 8 gauge.

Jumpers: Included with the woofer are two voice coil terminal jumpers. These jumpers allow you to easily wire the voice coils in parallel (for a 2-ohm load) or series (for an 8-ohm load).

h4>Enclosure

Enclosure Compatibility: The 8" Alpine Type-R Subs offer installation flexibility; they are compatible with sealed, vented, or bandpass enclosures, and infinite baffle installations (no bandpass enclosure specifications are listed in the manual).

Sealed Box Volume: Alpine recommends a sealed enclosure with an optimum internal volume of 0.3 cubic feet (from 0.15 to 0.5 cubic feet is acceptable). Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.

Vented Box Volume: Alpine recommends a vented enclosure with an optimum internal volume of 0.7 cubic feet (from 0.25 to 0.7 cubic feet is acceptable) using a 7"x3/4"x15-1/2" slot port; this yields a tuning frequency of 36 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output (below 31 Hz).

Product features:

These redesigned, fourth-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.

SPECIFICATIONS

  • Kevlar reinforced pulp cone with HAMR Santoprene rubber surround
  • frequency response: 30-200 Hz
  • power handling: 150-350 watts RMS (175 watts per coil)
  • peak power: 1,000 watts
  • sensitivity: 83.5 dB
  • top-mount depth: 4-1/2"
  • sealed box volume: 0.15-0.50 cu. ft.
  • ported box volume: 0.25-0.70 cu. ft

FEATURES

  • Material: Kevlar-Reinforced Pulp Fiber
  • Design: 2-Piece Structural Parabolic w/ H.A.M.R Surround (Patent Pending)
  • Material: Injected Molded Santoprene®
  • Design: High Amplitude Multi-Roll
  • Material: Nomex®
  • Design: Progressive
  • Material: 180°C High Temp Wire on Spiral Cut Aluminum Former
  • Design: 40 mm 4-Layer Dual Voice Coil
  • Pole Geometry: Compound Radius Curve (US Patent #6,639,993)
  • Configuration: Radial Vented VC Heat Sink and Airflow Management System (US Patent #7,634,101)
  • CAS Technology)
  • Material: Cast Aluminum
  • Design: Perimeter Vented Heat Transfer (Patent Pending), Integrated Shorting Sleeve and Airflow Management System
  • Layout: One Side
  • Design: Heavy Duty 10 mm² Push with Housing, Banana Plug Jumper
  • Design: Reinforced Layer Spider Integration (Patent #6,810,988)
  • Design: Concealed Mount Gasket System
  • Sold in individual units

Additional Information

Additional Information

Size 8" (20cm)

Reviews

Write Your Own Review

Only registered users can write reviews. Please, log in or register

Product Tags

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

You may also be interested in the following product(s)