B2 Audio RIOT Series 6.5" 4-Ohm 100W RMS Mid-Range Speakers UV-Coated Cone, Sold in Pairs RIOT6P 3001-5000 while D4 uses two 3

while D4 uses two 3

Stamped steel basket: rigid frame that minimizes unwanted vibration for clearer sound

Infrasonic Filter: 15–40 Hz @ 12 dB/octave to reduce rumble and protect woofers

High and low input modes: Supports both high-level and low-level sources for flexible integration with a variety of source units

B2 Audio RIOT Series 6.5" 4-Ohm 100W RMS Mid-Range Speakers UV-Coated Cone, Sold in Pairs RIOT6P 3001-5000 while D4 uses two 34 nominal impedance and 100W RMS per pair put the RIOT 6. 5" Bullet Mid Range speakers in a sweet spot for car builds that want clear vocals and punchy mids without oversized amps. Nominal Impedance: 4 Standard load for many car amplifiers, influencing how the speaker draws current and how the amp powers the midrange. RMS Power Handling: 100 W RMS 200 W MAX Designed for continuous midrange performance with headroom for short peaks without clipping.