GRS 3FR-4 3" Full-Range Speaker Driver 4Ω

The GRS 3FR-4 is a compact 3-inch full-range speaker driver with a 4-ohm impedance engineered for clear, balanced sound in small enclosures and DIY audio projects.

Designed for hobbyists, installers, and compact-system builders, this driver pairs a coated paper cone and foam surround with an economical ferrite magnet to deliver intelligible midrange and upper-bass from a very small footprint. The pincushion-style frame, front gasket, and GRS quality control make it a practical choice when space, cost, and reliable performance matter.

What sound character can I expect from this 3-inch full-range driver?

You can expect focused midrange clarity and workable high-frequency response ideal for small cabinets, portable devices, or nearfield monitors. It is not a subwoofer, so bass depth is limited compared with larger drivers; it excels at vocals and detailed midrange content.

• Coated paper cone for natural tone and quick transient response
• Foam surround helps control cone motion and reduces coloration
• Balanced output across mid and upper frequencies for vocal presence
• Best used with an enclosure tuned for small full-range drivers

How easy is it to mount and wire the GRS 3FR-4 in a project?

Mounting and wiring are straightforward — the pincushion-style frame provides multiple screw points and a front gasket ensures a snug acoustic seal. Standard speaker terminals accept wire hookup without special adapters, making it suitable for quick installations and DIY panels.

• Pincushion frame with pre-drilled mounting holes for easy attachment
• Front gasket improves sealing against baffle leakage
• Standard 4-ohm impedance compatible with most small amplifiers
• Clear terminal layout for straightforward wiring

What are the build features and reliability details I should know?

The 3FR-4 combines cost-effective components with GRS manufacturing standards: a ferrite magnet motor, coated paper cone, and foam surround assembled for consistent performance. GRS backs the product with a one-year warranty for peace of mind on normal use.

• Economical ferrite magnet assembly balancing cost and performance
• Durable coated paper cone for extended use and tonal consistency
• Foam surround chosen for controlled excursion at small cone diameters
• Includes GRS quality checks and a 1-year limited warranty

Which applications work best with this GRS full-range driver?

This driver is suited to compact speaker cabinets, multimedia enclosures, DIY Bluetooth speakers, and small PA or intercom systems where space is limited and clarity matters more than deep bass. Pair it with a small woofer or passive radiator if you need extended low-frequency output.

• Small bookshelf or desktop speakers where midrange detail is prioritized
• Portable and DIY Bluetooth speaker projects with limited internal volume
• Nearfield monitors and vocal reproduction in tight enclosures
• Multi-driver arrays where it serves as the primary mid/high element

Who is this for: audio DIYers, hobbyist builders, small-system integrators, and anyone needing a budget-friendly, compact full-range driver for clear midband performance in tight spaces. If you require deep bass or high-power handling, consider pairing this driver or stepping up to larger woofers and dedicated tweeters.