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The Kicker 51KST2504 is a pair of KS Series 1" (25 mm) silk-dome tweeters rated at 10–75W RMS, supplied with in-line 12dB crossovers and multiple mounting options.
For a smaller 0.75" (20 mm) dome version, see the Kicker 51KST2004 0.75" KS tweeters.
Key specifications
- Tweeter: 1" (25 mm) silk dome, neodymium magnet
- Recommended power: 10–75W RMS (225W peak)
- Impedance: 4 ohms
- Sensitivity: 94 dB (1W/1m)
- Frequency response: 3,500 Hz–21 kHz
- Crossover: in-line 12dB high-pass at 3,500 Hz
- Flush mounting: 45 mm hole, 12 mm depth
- Sold as: pair
KS 1" (25 mm) Tweeter Set with Crossovers
51KST2504
The KS Series tweeter offers extended frequency range and high power handling for greater volume and realism.
The silk dome reproduces high frequencies with smoothness and accuracy. Each pair comes with flush, angled and surface-pod mounting hardware, an in-line 12dB crossover and grilles.
Features
- Silk-dome construction for smooth, natural sound
- Four mounting options included (flush, angled, surface-pod)
- Extended frequency response: 3,500 Hz–21 kHz
- Lightweight neodymium magnets for efficient high-frequency output
- In-line 12dB crossover included
- Poly-switch protection
- Grilles included
The KS Series tweeters are optimised for 75W of recommended power and pair well with a full speaker upgrade such as the Kicker 43DSC6504 DS Series 6.5" coaxial speakers.
Explore the full range in Kicker KS Series Speakers.
Specification
| Tweeter (in,mm) | 1, 25 |
|---|---|
| Tweeter Dome Material | Silk |
| Rated Impedance (Ω) | 4 |
| Peak Power (watts, per ANSI/CTA-2031-A) | 225 |
| Recommended Amplifier Power (watts RMS) | 10-75 |
| Sensitivity | (1W, 1m) 94 |
| Frequency Response | (Hz) 3500-21k |
| Flush Mount Tweeter Depth (in, mm) | 0.5, 12 |
| High Pass (dB), at Frequency (Hz) | 12, 3500 |
More specs
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What's Included
- Kicker 51KST2504
- 2 x KS tweeters
- 2 x KS crossovers
- 2 x flush rings
- 2 x angle rings (front and back)
- 2 x surface-mount pods with pod nuts and washers
- Long and short nuts and mounting screws
- Tweeter tool
Kicker
About the Kicker 51KST2504
From our tech experts at CEN
Tweeters handling 75w RMS for adding high-frequency detail where the factory system has none, or for replacing tweeters in an existing component set.
Who it suits
Drivers whose system sounds dull at the top, and anyone building a front stage where the tweeter needs mounting on the pillar or dash rather than down in the door.
Our tech experts advise
Placement and aiming change the sound more than the tweeter itself, and they need crossing over properly so they are not asked to play too low. get in touch if you are unsure how they would integrate with your speakers. See car audio installation.
Explore the full Kicker range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Kicker
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Frequently Asked Questions
Q: Will these speakers fit my car?
A: Most car speakers are standard sizes, but mounting depth and fitting rings vary by vehicle. Check the size in the Specification tab against your vehicle, or contact CEN with your registration and we will confirm fitment and any adapters or fitting kits you need.
Q: Do I need an amplifier to run these speakers?
A: Not always. Most speakers will run from a standard head unit, but a dedicated amplifier lets them perform at their best, particularly for component sets and higher power handling models. The RMS figure in the Specification tab is the guide to how much clean power they can use.
Q: Do these come as a pair?
A: Unless stated otherwise, car speakers are sold in pairs. Check the product title and What's Included tab, which lists exactly what is in the box.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
Q: How much power do the Kicker KST2504 tweeters need?
A: Kicker recommends 10 to 75 watts RMS, with a 225 watt peak rating, at 4 ohms.
Q: Do the KST2504 tweeters come with crossovers?
A: Yes. Each tweeter has an in-line 12dB crossover with a 3,500Hz high-pass point.
Q: What's in the box with the Kicker 51KST2504?
A: Two KS tweeters and two crossovers, plus flush rings, front and back angle rings, surface-mount pods with nuts and washers, mounting screws and a tweeter tool.
