GRS SPBF-8 Mid-bass Woofer 8 Ohm

The GRS SPBF-8 is a high sensitivity 8 ohm, 60W 5.25” sealed midrange with a 1” diameter voice coil and polyimide former. This midrange driver uses a durable poly cone body and foam surround. It is a dedicated midrange for 2-way and 3-way projects. The sealed frame means it does not require a separate enclosure. Use it as a replacement speaker or add to an existing system.

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Product highlights:

• Sealed frame design eliminates the need for a separate enclosure
• High sensitivity for maximum output
• Extended frequency range out to 9kHz
• Economic way to add a dedicated midrange to a system
• Polyamide voice coil for high power handling

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Product details

SPBF-8 5-1/4" Sealed Back Midrange with 1" Voice Coil 8 Ohm

The GRS SPBF-8 is a 5-1/4" sealed midrange driver with low distortion characteristics and predictable performance, making this a great component for speaker designers. The sealed back frame provides isolation of the cone when installed in cabinets with larger woofers so the SPBF-8 performs consistently, regardless of what enclosure you use!

The GRS SPBF-8 sealed midbass driver is a great choice for use in dynamic 2-way and 3-way designs. Thanks to the sealed frame providing the perfect compliance volume for this driver, the output is consistent for car audio, home hi-fi, and even musical instrument applications!

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Technical Specifications:

• Article number SPBF-8
• Woofer Series SPBF
• Woofer Type Bass-mid woofer
• Nominal Diameter 5-1/4"
• Power Handling (RMS) 30 watts
• Power Handling (max) 60W
• Impedance (Z) 8 ohms
• Sensitivity (SPL at 1m / 2.83V) 92 dB
• Frequency Response 500 – 9,000 Hz
• DC Resistance (Re) 6.9 ohms
• Voice Coil Inductance (Le) 0.28 mH @ 1kHz
• Resonant Frequency (Fs) 421 Hz
• Mechanical Q (Qms) 13.0
• Electromagnetic Q (Qes) 4.13
• Total Q (Qts) 3.14