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CLEARANCE Peerless by Tymphany STW-350F188PR01-04 15" High Power Subwoofer

Peerless by TymphanyPart # 264-1652
Model: STW-350F188PR01-04

The Peerless STW-350F188PR01-04 15" subwoofer produces deep and clean low-frequency reproduction with minimal distortion at high output levels. Designed from the ground up for output, performance, and reliability from the smallest enclosures, this driver with its 7.4" voice coil, internal magnet assembly, and outrageous excursion capability is a welcome departure from conventional subwoofer designs.

Key Features

  • Massive 7.4" voice coil produces extraordinary low power compression
  • 2 Large aluminum shorting rings for better control and minimal harmonic distortion
  • Dual 8 ohm voice coil allow multiple wiring configurations including dual amplifier designs
  • Internal magnet structure provides more force from a smaller magnet
  • Lower Vas and Fs with higher BL for unmatched low end capability from the smallest enclosures
  • Extensive voice coil venting for quiet operation and increased power handling
  • Over 90mm of mechanical excursion prevents failure under the most demanding conditions
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Overview

Peerless by Tymphany STW-350F188PR01-04 15" High Power Subwoofer

A New Generation of High Output, High Power Subwoofers

The STW-350F-188PR01-04 subwoofer from Peerless was designed with performance and space in mind. This drivers offer deep and clean low-frequency reproduction with minimal distortion at high sound pressure levels. Unlike most subwoofers, the STW-350 can be mounted in a much smaller box than traditional subwoofers, which is enabled by the low Vas, high moving mass, and huge 7.4" (188 mm) voice coil. This driver also features a unique FEA-optimized ferrite motor, extremely robust suspension, and an incredible amount of venting which provides extraordinarily low power compression even when driven with over 3,500 watts of power. This driver is built for high-quality performance and long term reliability.

Note: Due to the incredible amount of venting on this driver, when used outside of an enclosure, the air turbulance generated will create audible noise. Because of this, we recommend the use of a sealed enclosure.

Massive 7.4" Diameter x 2.25" Long Voice Coil

With small enclosure subwoofer design high-moving mass is necessary, but it is difficult to apply mass where it can be put to work. For the STW-350F, it was put into the voice coil – this improves the performance of the driver by raising the motor force. Unlike a conventional motor design, Bl changes very slowly as function of voice coil displacement. A voice coil with large surface area also offers another benefit – power compression is practically non-existent. Because of this, the voice coil takes longer to heat up, resulting in uncompressed dynamic musical peaks.

Internal Motor Design

To drive a high moving mass a subwoofer needs a powerful motor. In most cases a more powerful motor is achieved with a larger magnet (which increases a driver cost, size, and weight) or using a more efficient neodymium magnet (which is unstable and loses strength as the temperature increases). An additional benefit of the STW-350F's giant coil is that Peerless was able to mount a ferrite motor inside of the voice coil. Conventional motor structures with the magnet outside of the motor lose 50% of their energy in stray fields, while a magnet on the inside of the voice coil will have 90% or better magnet utilization. The STW-350's motor is the best of both worlds: reliable and efficient.

Long Coil + Long Gap = High Excursion

With an Xmax of 10.4 mm this driver might not seem all that impressive. However, Xmax is just a physical measurement and not actually the limit of linear excursion (Xmax = (Voice Coil Length - Magnetic Gap Height) / 2). The STW-350F has a remarkably long 36 mm magnetic gap with a 57 mm long voice coil. Thanks to such extreme dimensions and a well controlled magnetic field, this driver is capable of 45.5 mm of excursion before any major loss in motor strength (Bl). In other words, this driver is capable of 90 mm (3.5") peak to peak excursion while still producing low distortion output.

Front and Rear Mounting Points

Due to the weight and extreme force that the STW-350F is capable of, Tymphany included rear mounting points on the back side of the frame. By attaching the rear of the frame to a brace in an enclosure, the baffle will be solidly tied to the sides walls increasing the rigidity of the enclosure while helping to support the overall weight of the STW-350F. These threaded holes accept M6 x 30 screws.

Note: Specifications below are measured with voice coils wired in parallel

Product Details

BrandPeerless by Tymphany
ModelSTW-350F188PR01-04
Part Number264-1652
UPC848864049885
Unit of MeasureEach
Weight65

Product Specifications

Nominal Diameter15"
Bolt Circle Diameter14.25
Power Handling (RMS)3500 Watts
Power Handling (MAX)5000 Watts
Impedance16Ω
Frequency Response10 to 500Hz
Sensitivity88.7dB 2.83V/1m
Voice Coil Diameter7.4"

Thiele-Small Parameters

Resonant Frequency (Fs)25.3Hz
DC Resistance (Re)3.2Ω
Voice Coil Inductance (Le)3.31mH
Mechanical Q (Qms)11.39
Electromagnetic Q (Qes)0.5
Total Q (Qts)0.48
Compliance Equivalent Volume (Vas)2.05ft³
Mechanical Compliance of Suspension (Cms)0.068mm/N
BL Product (BL)24.18T·m
Maximum Linear Excursion (Xmax)10.4mm
Surface Area of Cone (Sd)774.4cm²

Materials of Construction

Cone MaterialPaper / Carbon Fiber
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerFiberglass
Basket / Frame MaterialCast Aluminum
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter15"
Baffle Cutout Diameter13.7"
Depth9.17"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume2ft³
Sealed F342Hz
Vented Volume2.88ft³
Vented F324.2Hz

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