The Richter-15 raw speakers are engineered for sound technicians, DIY builders, and repair shops who need reliable 15" replacement drivers for PA cabinets, bass guitar rigs, or custom builds. These woofers deliver the foundation your system needs without breaking the budget.

Each Richter-15 handles 250 watts RMS and 500 watts peak power, providing the headroom necessary for live sound applications where dynamics matter. The 8-ohm impedance ensures compatibility with most amplifiers and cabinet configurations.

The die-cast aluminum chassis provides structural integrity under high power loads, while the 50-ounce magnet and 3" voice coil deliver controlled bass response with 98 dB sensitivity. The frequency response spans 50 Hz to 5 kHz, making these drivers suitable for full-range applications or as dedicated low-frequency drivers in multi-way systems. The paper cone with cloth surround construction offers natural midrange characteristics that work well for both music and speech reproduction.

Use these speakers for repairing existing PA cabinets, building custom monitor wedges, or upgrading bass guitar enclosures. They work effectively in venues up to 200 people when properly paired with appropriate amplification. The vented enclosure design recommendation ensures optimal bass extension for live sound applications.

The Richter-15 pair ships ready to install in your existing cabinets. Standard speaker terminals accept banana plugs, spade connectors, or bare wire connections.

Seismic Audio backs each pair with a one-year warranty and ships from our warehouse for reliable delivery. Professional-grade drivers at a price point that makes sense for working musicians and sound technicians.

Technical Specifications

Frequently Asked Questions

What size venues can the Richter-15 speakers handle?

A pair of Richter-15 drivers with proper amplification can effectively cover indoor venues up to 200 people. For outdoor events or larger spaces, you'll want to add more cabinets or pair them with dedicated subwoofers. The 98 dB sensitivity means they'll produce good volume without requiring massive amplifier power.

What kind of amplifier do I need for these speakers?

Each Richter-15 is rated at 250 watts RMS with 8-ohm impedance, so a stereo amplifier delivering 250-400 watts per channel at 8 ohms works well. You can also bridge a mono amplifier or use them in larger arrays. Avoid amplifiers that deliver significantly more than 500 watts peak to prevent driver damage.

Can I use these for bass guitar cabinets?

Yes, the Richter-15 works well for bass guitar applications, especially in vented enclosures. The 50 Hz low-frequency response provides solid fundamental bass notes, while the 5 kHz high-frequency limit captures the midrange clarity that cuts through a band mix. Many players use them for practice rigs or smaller venue performance.

What cables and connections do I need?

These are raw drivers with standard speaker terminals that accept banana plugs, spade connectors, or bare wire connections. You'll need standard speaker cable (12-16 AWG recommended) to connect from your amplifier to the cabinet terminals. No special connectors or adapters are required for installation.

How do these compare to buying a complete PA speaker?

Raw drivers like the Richter-15 give you flexibility to build custom cabinets or replace blown speakers in existing enclosures at a lower cost than complete speakers. However, you'll need woodworking skills and knowledge of enclosure design, plus separate amplification. If you need a plug-and-play solution, consider Seismic Audio's powered PA speakers instead.

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