Designed and built in the USA, the Quatro subwoofers offer extreme dependability and ruggedness, making them perfect for home theater or automotive environments. Heavy-gauge 4-layer voice coils, extended back plates, and vented pole pieces provide clean excursion and high power handling. Rubber magnet boots, gold-plated spring terminals (except on 8" model), and a coated paper cone give a functional yet attractive look. The Quatro subwoofers offer excellent overall build quality and performance at a competitive price.

• Work great in small, sealed enclosures for the automotive environment
• High sensitivity design allows strong output with modest amplifiers
• Ultra-rugged construction for many years of use

QT210-4 8" Quatro Specifications

• Power Handling: 150 watts RMS/300 watts max
• VCdia: 1.5"
• Le: 2.2 mH
• Znom: 4 ohms
• Re: 3.90 ohms
• Frequency range: 35-200 Hz
• Magnet weight: 33 oz.
• Fs: 36 Hz
• SPL: 89.2 dB 2.83V/1m
• Vas: .82 cu. ft.
• Qms: 8.2
• Qes: .42
• Qts: .40
• Xmax: 9.5 mm
• Dimensions:
  Overall Diameter: 8-1/4"
  Cutout Diameter: 7-1/4"
  Mounting Depth: 4".

QT255-4 10" Quatro Specifications

• Power Handling: 200 watts RMS/400 watts max
• VCdia: 2"
• Le: 2.0 mH
• Znom: 4 ohms
• Re: 3.40 ohms
• Frequency range: 30-200 Hz
• Magnet weight: 44 oz.
• Fs: 30 Hz
• SPL: 92.3 dB 2.83V/1m
• Vas: 1.84 cu. ft.
• Qms: 8.0
• Qes: .31
• Qts: .30
• Xmax: 8 mm
• Dimensions:
  Overall Diameter: 10"
  Cutout Diameter: 9"
  Mounting Depth: 4-3/4"

QT305-4 12" Quatro Specifications

• Power Handling: 250 watts RMS/500 watts max
• VCdia: 2-1/2"
• Le: 2.5 mH
• Znom: 4 ohms
• Re: 3.50 ohms
• Frequency range: 25-200 Hz
• Magnet weight: 56 oz.
• Fs: 27 Hz
• SPL: 93.6 dB 2.83V/1m
• Vas: 4.24 cu. ft.
• Qms: 10.5
• Qes: .37
• Qts: .36
• Xmax: 10 mm
• Dimensions:
  Overall Diameter: 12"
  Cutout Diameter: 11"
  Mounting Depth: 6"

QT385-4 15" Quatro Specifications

• Power Handling: 300 watts RMS/600 watts max
• VCdia: 2-1/2"
• Le: 3.5 mH
• Znom: 4 ohms
• Re: 3.45 ohms
• Frequency range: 20-125 Hz
• Magnet weight: 67 oz.
• Fs: 21 Hz
• SPL: 91.8 dB 2.83V/1m
• Vas: 6.60 cu. ft.
• Qms: 14.0
• Qes: .42 *Qts: .41
• Xmax: 10 mm
• Dimensions:
  Overall Diameter: 15-1/8"
  Cutout Diameter: 13-7/8"
  Mounting Depth: 6-5/8".