Why pay more? The GRS 3FR-4 is a great replacement driver for the widely-used, 3"-size full range drivers found commonly in home theater systems, table radios, “sound bars”, and multimedia speaker systems, among many other uses. It’s also useful as a replacement for 3" woofers.

A sturdy stamped steel frame with “pincushion”-shaped mounting flange supports a robust ferrite ceramic magnet, and the coated paper cone with foam surround delivers clear sound that you might not expect from a driver this affordable.

Product Specifications

Nominal Diameter    3"
Power Handling (RMS)    10 Watts
Power Handling (max)    20 Watts
Impedance    4 ohms
Frequency Response    135 to 16,000 Hz
Sensitivity    81 dB 1W/1m
Voice Coil Diameter    0.75"

Thiele-Small Parameters

Resonant Frequency (Fs)    135 Hz
DC Resistance (Re)    4.00 ohms
Voice Coil Inductance (Le)    0.39 mH
Mechanical Q (Qms)    4.11
Electromagnetic Q (Qes)    1.11
Total Q (Qts)    0.88
Compliance Equivalent Volume (Vas)    0.03 ft.³
Maximum Linear Excursion (Xmax)    2 mm

Materials of Construction

Cone Material    Paper
Surround Material    Foam
Basket / Frame Material    Steel
Magnet Material    Ferrite

Mounting Information

Overall Outside Diameter    3.75"
Baffle Cutout Diameter    2.82"
Depth    1.69"
# Mounting Holes    4

Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)

Sealed Volume    0.08 ft.³
Sealed F3    131 Hz
Vented Volume    0.15 ft.³
Vented F3    78 Hz