The Richter-8 is a professional 8-inch replacement woofer designed for musicians, sound engineers, and DIY builders who need reliable mid-range drivers for speaker cabinet construction or repairs. This raw driver delivers consistent performance for PA systems, monitor wedges, and bass guitar cabinets.

Built around a robust die-cast aluminum chassis, the Richter-8 handles 175 watts RMS (350 watts peak) with an 8-ohm impedance that matches most professional audio setups. The paper cone with cloth surround provides natural mid-range reproduction, while the 50-ounce magnet structure ensures solid transient response across the 65 Hz to 5 kHz frequency range.

The 96 dB sensitivity rating means this driver works efficiently with lower-powered amplifiers while still delivering punch when pushed harder. The 2-inch voice coil diameter provides thermal stability during extended use, making it suitable for both portable PA applications and permanent installations. At 8 pounds with a 7¾-inch cutout diameter, it fits standard 8-inch cabinet openings.

This woofer works well in vented enclosures for full-range applications in small to medium venues serving up to 200 people, monitor wedges for stage use, or as mid-range drivers in larger multi-way systems. Bass players will find it handles the fundamental frequencies of electric bass effectively in combo amp rebuilds.

The driver includes four ¼-inch mounting slots for secure cabinet installation. You'll need standard wood screws and potentially gasket material depending on your cabinet design.

Seismic Audio backs the Richter-8 with a one-year warranty. Professional-grade components at a practical price point for working musicians and sound professionals.

Technical Specifications

Frequently Asked Questions

What size venues can this 8-inch driver handle?

The Richter-8 works well for small to medium venues up to 200 people when used in properly designed vented enclosures. For larger spaces, consider using multiple drivers or pairing with subwoofers for full-range coverage. Its 175-watt RMS handling makes it suitable for most portable PA applications and monitor systems.

Will this driver fit my existing 8-inch speaker cabinet?

The Richter-8 requires a 7¾-inch cutout diameter and mounts with four ¼-inch screws or bolts. Check your cabinet's cutout size and mounting hole pattern before ordering. The overall depth is 3¾ inches, so ensure adequate clearance inside your enclosure, especially if it contains other components.

Can I use this for bass guitar applications?

Yes, the Richter-8 handles bass guitar frequencies effectively with its 65 Hz low-end response. It works well in combo amp rebuilds or as part of a bass cabinet project. However, for full-range bass reproduction, you may want to pair it with a dedicated subwoofer or use multiple drivers for increased output.

What impedance should my amplifier be to match this driver?

This driver has an 8-ohm impedance, so it pairs well with amplifiers designed for 8-ohm loads. You can also wire two Richter-8 drivers in parallel for a 4-ohm load, or in series for 16 ohms, depending on your amplifier's optimal impedance rating and power requirements.

Do I need a crossover with this driver?

For full-range applications within its 65 Hz to 5 kHz range, no crossover is required. However, if you're building a multi-way system with tweeters or subwoofers, you'll need appropriate crossover components to divide frequencies properly. The driver works well as a mid-range component in larger PA systems when properly crossed over.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov