KICKER 51KSC6504 KS-Series 6.5" Coaxial Speakers
with .75" tweeters, 4-Ohm, Pair
Price as of 2026-06-02. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in Car Speakers
- •Those who want a top-rated option — in the top 14% of Car Speakers by rating
- •You're on a tight budget — $45 above the category average of $85
- •KICKER 2 Kicker 43DSC504 D-Series 5.25" 200W 2-Way 4-Ohm offers a better rating (4.7/5) at a similar or lower price ($70)
- •Kenwood KFC-6966S 6 x 9 Inch 400-Watt 3-Way Flush Mount — 60% cheaper at $52 (Score A-)
- •KICKER 2 Kicker 43DSC504 D-Series 5.25" 200W 2-Way 4-Ohm — higher rated at 4.7/5 ($70)
📊 Based on data analysis of 36 products in this category.
Mubboo Score: B-
How It Compares
This Product KICKER 51KSC6504 KS-Series 6.5" Coaxial Speakers | Most Popular Rockford Fosgate P1650 Punch 6.5" 2-Way Coaxial Full Range Speaker | Best Rated KICKER 2 Kicker 43DSC504 D-Series 5.25" 200W 2-Way 4-Ohm | Best Value Kenwood KFC-6966S 6 x 9 Inch 400-Watt 3-Way Flush Mount | |
|---|---|---|---|---|
| Price | $129.99 | $109.99 | $69.99 | $52 |
| Rating | 4.6/5 | 4.6/5 | 4.7/5 | 4.6/5 |
| Reviews | 599 | 9,435 | 1,783 | 2,254 |
| Mubboo Score | B- | B+ | B+ | A- |
Quick Specs
- Color
- Black
- Impedance
- 4 Ohms
- MP3 player
- No
- Unit Count
- 1.0 Count
- Item Weight
- 5.7 Pounds
- Manufacturer
- Kicker
- Model Number
- 51KSC6504
- Power Source
- Corded Electric
What People Say
Synthesized from 40 reviews · 100% verified purchases.
These budget speakers offer clear highs and good value, but expect limited bass unless you add a subwoofer. Be prepared to buy vehicle-specific adapters or mounting brackets for proper fit.
- Great value for money
- Crisp and clear sound quality
- Easy installation
- Significant improvement over factory speakers
- Surprising bass for budget speakers
- Weak bass response
- Installation may require additional adapters or modifications
- Durability concerns or distortion at high volumes
Expert Picks in Car Speakers
- Sony SS-CS5M2 — Home theater and music
- Bose SoundLink Plus — Best Bluetooth speaker overall
- Soundcore by Anker Boom 2 — Best value Bluetooth speaker
Category recommendations from independent expert publications. Source links in References.
Related Video Reviews
- 📹 The best premium car speakers for 2026 | Crutchfield — CRUTCHFIELD
- 📹 Best 6.5 Inch Car Speakers 2026 - These Are The Only 6 To Consider — Consumer Betterment
- 📹 The best car speakers under $100 in 2026 | Crutchfield — CRUTCHFIELD
Key Features
- ✦KICKER KS-Series Speakers let you play at concert-like volume, yet maintain the smoothness and subtlety to please even the most selective ear.
- ✦The high-performance woofers utilize internally dampened polypropylene cones and tough rubber surrounds for outstanding midrange detail and pounding bass!
- ✦Completely redesigned with new cones, voice coils and crossovers, KS-Series Coaxial Speakers are a serious upgrade from your factory sound.
- ✦Featuring zero (or minimal) tweeter protrusion, you get a perfect fit in almost every vehicle on the road today, without modifications.
Source: product listing on Amazon.
About KICKER
- 17 products in our database
- Average rating: 4.6/5 across all products
- Price range: $51.96 – $359.96
- Categories: car-electronics, Car Speakers, Car Subwoofers, marine-electronics, speakers
Other Car Speakers
Bottom Line
KICKER 51KSC6504 KS-Series 6.5" Coaxial Speakers earns Mubboo Score B-. Priced at $130 — a premium option, above the category average of $85. Rated 4.6/5 from 599+ reviews. Strong buy if: buyers who prioritize quality over price in car speakers, those who want a top-rated option. Skip if: you're on a tight budget — Rockford Fosgate P1650 Punch 6.5" 2-Way Coaxial Full Range Speaker (Score B+, $110) may fit better.
Frequently Asked Questions
Is the KICKER 51KSC6504 KS-Series 6.5" Coaxial Speakers worth buying in 2026?
It earns a Mubboo Score of B-, with a 4.6/5 rating from 599 reviews — better than 86% of Car Speakers we track.
How much does the KICKER 51KSC6504 KS-Series 6.5" Coaxial Speakers cost?
It is currently $129.99 — premium-tier pricing for Car Speakers.
How does the 51KSC6504 KS-Series 6.5" Coaxial Speakers compare to other Car Speakers?
The category's most-reviewed alternative is the Rockford Fosgate P1650 Punch 6.5" 2-Way Coaxial Full Range Speaker (4.6/5, 9,435 reviews, $109.99). The 51KSC6504 KS-Series 6.5" Coaxial Speakers carries a Mubboo Score of B- vs B+.
Sources & References
Mubboo may earn a commission from purchases made through links on this page. Prices and availability are accurate as of the last sync (2026-06-02) and may change.