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Pair of 6.5-inch black coaxial speakers with foam fast rings

Alpine

Alpine R2-S65 6.5" Coaxial Pair with RKFR6 Fast Rings

SKU CH-AHVX-PRSSX

6.5" coaxial speaker pair with foam fast rings delivers 100 W RMS power, 65 Hz–40 kHz response and 88 dB sensitivity for clearer mid-bass and reduced vibration

  • TypeSpeaker
  • High-resolution audio up to 40 kHz frequency response
  • 100 W RMS power handling for clean, loud playback
  • 88 dB sensitivity extracts more volume from every watt
  • Glass-fibre reinforced cones with composite baskets reduce distortion
  • Included RKFR6 Fast Rings cut panel vibration and boost mid-bass

Alpine R2-S65 coaxial speaker bundle

The Alpine R2-S65 bundle pairs 6.5" high-resolution coaxial speakers with RKFR6 foam fast rings. Each speaker uses a glass-fibre reinforced cone and integrated hard-dome tweeter for wide frequency coverage. The composite basket and included grilles suit standard door locations. This kit targets drivers who want clearer mids and highs without adding separate component crossovers. Buyers needing deeper bass extension or higher power handling should consider larger component sets.

Thermals noise and power handling

The speakers handle 100 watts RMS and 300 watts peak with a 4-ohm nominal impedance. Sensitivity is rated at 88 dB SPL at one watt and one metre, so moderate amplifier power reaches comfortable listening levels. The RKFR6 rings reduce panel vibration and minimise front-to-rear wave cancellation, improving mid-bass efficiency. No active cooling or fan noise is involved, and the passive crossover networks operate silently within the speaker frame.

Upgrade path and when it matters

This bundle replaces factory 6.5" coaxial units that lack dedicated tweeters or use paper cones. The integrated crossover and 65 Hz to 40 kHz response deliver noticeable detail improvement over basic OEM speakers. The 13.5 cm cutout and 6.3 cm mounting depth fit many existing door openings without major modification. The jump is worth it when the goal is cleaner high-frequency output and tighter mid-bass from a direct-fit installation.

Highlights

  • High-resolution audio up to 40 kHz frequency response
  • 100 W RMS power handling for clean, loud playback
  • 88 dB sensitivity extracts more volume from every watt
  • Glass-fibre reinforced cones with composite baskets reduce distortion
  • Included RKFR6 Fast Rings cut panel vibration and boost mid-bass

Specifications

TypeSpeaker

Questions about this item

How do I mount the 6.5-inch speakers and the Fast Rings together, and which step is often missed?

Cut a 13.5 cm hole, press the speaker gasket ring onto the baffle, then peel and stick the middle ring around the speaker edge and the outer ring to the door metal; the outer ring is the step most often skipped.

What part of this bundle will need replacement first?

The foam Fast Rings will compress and lose sealing ability before the speakers themselves, so plan to replace the rings after several seasons of temperature cycling.

At sustained output, which limit appears first — thermal or excursion?

With 100 W RMS and 88 dB sensitivity, the voice coil reaches thermal limits before the 6.3 cm mounting depth allows full cone excursion at high volumes.

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