Kleinn Train Horns
Phoenix AZ-based US air horn manufacturer. Chrome and polished-stainless trumpet aesthetics, 145–148 dB published output. Founded 2002, mid-tier price point between budget and HornBlasters flagship.
About Kleinn Air Horns
Kleinn Automotive Air Horns is a US-based air horn manufacturer headquartered in Phoenix, Arizona. Founded in 2002, Kleinn focuses on chrome- and stainless-finished aftermarket trumpets, complete kits, and air system components. The company markets to the truck / 4WD / RV aftermarket and emphasizes "Made in the USA" assembly.
Kleinn's product line covers entry-level (Model 230 at $215) through premium (HK9 at $1,180). Output ranges from ~145 dB on smaller kits to ~148 dB on larger configurations per published manufacturer specs. We treat the higher dB claims with appropriate skepticism — Kleinn doesn't always publish the testing methodology and most independent measurements come in below the manufacturer's headline number.
Kleinn models
- Kleinn Model 230 — 3-trumpet 145 dB published, $214.95 standalone. Entry-level, chrome trumpets, decent acoustic output for the price.
- Kleinn HK9 — premium kit with 148 dB published, $1,179.95 complete. Chrome trumpets, larger air system, mid-premium tier.
- Kleinn Slimline — variant of the HK9 with smaller install footprint, $1,099+. Same trumpets, lower-profile mounting hardware.
- Kleinn 730 series — entry-level single-trumpet kits
- Kleinn 730NB / 730XL — larger air systems with 4-trumpet configurations
Why aftermarket buyers pick Kleinn
- Chrome / polished aesthetics. Kleinn trumpets are visibly chrome / stainless on most models — visual upgrade vs. HornBlasters' fiberglass black trumpets. Some buyers care about how the horn looks under the bumper or behind the grille.
- Made in USA marketing. Kleinn explicitly markets US manufacturing — appeals to buyers willing to pay a small premium for that.
- Mid-tier pricing. Cheaper than HornBlasters flagship Shocker XL kit ($1,800+); more expensive than Conductor's 228H ($650). The HK9 / Slimline at $1,100–$1,200 occupies that middle ground.
- Wide retailer presence. Available at Summit Racing, JEGS, Amazon, 4WD specialty shops — not just direct-to-consumer.
Kleinn vs. HornBlasters
| Feature | Kleinn HK9 | HornBlasters Shocker XL |
|---|---|---|
| Output (published) | 148 dB | 147.7 dB at 3 ft |
| Trumpet count | 3 | 4 |
| Trumpet finish | Chrome | Fiberglass-reinforced ABS (black) |
| Complete kit price | $1,179.95 | $1,800–$2,200 |
| Made in | USA | USA (assembly) |
| Warranty | Manufacturer (varies) | Lifetime horn |
On paper Kleinn HK9 looks competitive with Shocker XL. In practice, independent measurements often come in below the published 148 dB. The Shocker XL's 147.7 dB at 3 ft is verified by HornBlasters' published methodology; Kleinn's testing details are less transparent. We'd take the dB-claim difference with appropriate caution.
Where to buy Kleinn horns
- Kleinn.com — direct sales
- Amazon — most models with Prime shipping
- Summit Racing
- JEGS
- 4WD / truck specialty shops
Related pages
Sources
- Kleinn.com — manufacturer site (product specs, claims)
- Kleinn Amazon storefront (cross-verification, pricing)
- Kleinn 230 full review (this site)
- Kleinn HK9 full review (this site)
We aggregate publicly available data only. We do not perform hands-on testing — see our methodology. Independent dB measurements may differ from manufacturer claims; verify before purchase if peak SPL is critical.