DAYTON AUDIO UM8-22 ULTIMAX Speaker Driver Subwoofer DVC Glass Fiber 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm

DAYTON AUDIO UM8-22 ULTIMAX Speaker Driver Subwoofer DVC Glass Fiber 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm New
Dayton Audio's Ultimax series of dual-coil subwoofers use the latest in subwoofer technology. As a result, the UM8-22 Ultimax is capable of delivering extremely deep and punchy bass. Its 2Ω dual voice coil allows for 2Ω stereo and 1Ω mono wiring configurations when paired with high current car or professional audio amplifiers to extract maximum power. For home applications, simply wire the coils in series for a 4Ω load and better compatibility with HiFi amplifiers.

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Dayton Audio UM8-22 Ultimax

Speaker Driver Subwoofer DVC Glass Fiber 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm

Dayton Audio UM8-22 Ultimax Haut-Parleur Subwoofer DVC Fibre de Verre 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm

Dayton Audio's Ultimax series of dual-coil subwoofers use the latest in subwoofer technology. As a result, the UM8-22 Ultimax is capable of delivering extremely deep and punchy bass. Its 2Ω dual voice coil allows for 2Ω stereo and 1Ω mono wiring configurations when paired with high current car or professional audio amplifiers to extract maximum power. For home applications, simply wire the coils in series for a 4Ω load and better compatibility with HiFi amplifiers.

To improve power handling, thermal management and power compression, Dayton Audio has designed the Ultimax range with large anodized frames and aerated pole pieces, under spider ventilation and double layer copper coils. It also benefits from a large travel capacity with a linear displacement, thanks to the use of a double spider, which also limits distortion. The rubber surrounds with integrated seals maintain the speaker surface in case of extreme deflection. The thick Nomex diaphragm has a woven glass fiber coating, creating an ultra rigid, distortion resistant surface.

A large copper tube and copper end cap in the motor reduce energy storage from the inductor, thereby reducing distortion for faster response. Large, high-energy magnets give this subwoofer a Qts such that it can be used in both open and closed speaker cabinets.

Dayton Audio UM8-22 Ultimax Haut-Parleur Subwoofer DVC Fibre de Verre 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm

Technical characteristics

Specifications
Speaker driver typeSubwoofer
Nominal diameterØ20.3cm (8")
Power handlingRMS : 300W
Max : 600W
Impedance2+2Ω
Frequency response30Hz - 800Hz
Sensitivity84.2dB @ 2.83V/1m
Voice coil diameterØ50.8mm (2")
Weight5.19kg
Thiele-Small Parameters
Resonant frequency (Fs)31.6Hz
DC Resistance (Re)4.2Ω
Voice coil inductance (Le)1.14mH
Mechanical Q (Qms)2.51
Electromagnetic Q (Qes)0.75
Total Q (Qts)0.58
Compliance equivalent volume (Vas)21.3L (0.75ft.³)
Mechanical compliance of suspension (Cms)0.33mm/N
Force factor (BL)9.1Tm
Diaphragm mass inc. airload (Mms)74.5g
Max linear excursion (Xmax)16mm
Surface area of cone (Sd)211.2cm²
Materials
Cone materialNomex
Glass fiber
Surround materialRubber
Voice coil wire materialCopper
Voice coil formerAluminum
Basket / Frame materialCast aluminum
Magnets materialFerrite
Mounting informations
Overall outside diameterØ210mm
Cutout diameterØ189mm
Depth143.5mm
Number of mounting holes8
Optmum cabinet size (measured with BassBox 6 Pro)
Sealed volume9.9L (0.35t³)
Sealed F349Hz
Vetend volume21.2L (0.75t³)
Vetend F330Hz
 
Data sheet
Speaker TypeSubwoofer
Impedance (Ω)2+2
Loudspeaker diameter (mm)203.0
Diaphragm typeGlass fiber
Efficiency / Sensitivity (dB)84.0
Max Linear Excursion (Xmax) (mm)16.0
Lowest frequency (Hz)30
Highest frequency (Hz)800
 
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DAYTON AUDIO UM8-22 ULTIMAX Speaker Driver Subwoofer DVC Glass Fiber 300W 2 ohm 84dB 30Hz-800Hz Ø20.3cm
Dayton Audio's Ultimax series of dual-coil subwoofers use the latest in subwoofer technology. As a result, the UM8-22 Ultimax is capable of...

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