Model 730: The "Demon" Stainless Steel Triple Train Horns
KL 730FE
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Model 730: The Demon™ Triple Steel Train Horns
The Undisputed King of the Road
When the situation demands more than just a loud horn, the Demon 730 stainless steel horns dominate the road! Delivering a sonic roar that cuts through sirens, heavy machinery, and chaotic traffic, these precision tuned steel horns are the ultimate train horn solution. Engineered to move massive volumes of air, the 730 provides the deep, earth-shaking rumble of an authentic 40,000-lb locomotive.
XCR 2.0™ Extreme Durability
Featuring our signature XCR 2.0™ salt-spray resistant coating, the Demon 730 thrives in the harshest environments. Whether faced with coastal salt air or off-road mud, these horns are built to maintain their professional-grade finish and startling output for the long haul. The stainless steel construction ensures that the internal components won't succumb to the corrosion that destroys lesser horns. We also offer limited edition Reaper Red Model KL 730RR and the Freedom Edition Red, White, and Blue Model KL 730FE.
Modular Mounting Flexibility
While the Demon 730 comes mounted on a heavy-duty flat rack, it offers maximum installation flexibility. Each individual trumpet can be removed from the rack and mounted separately to accommodate even the tightest installation requirements on trucks, SUVs, or Jeeps. This modular architecture allows you to tuck the massive 6" to 7" bells into locations where a fixed-rack system simply won't fit.
WHY CHOOSE THE "DEMON” 730 HORNS?
- Unmatched Volume & Airflow: The undisputed crown jewel of the Kleinn lineup and our loudest stainless-steel triple train horn complete with 12' of 1/2" airline from the tank, and 3/8" lines feeding the second and third horns. (Upgrade to the 6890 to add 1/2" line to each horn complete with 2 additional Vortex 6 VX6003 Solenoids).
- Heavy-Duty Construction: Built with precision-tuned stainless steel trumpets for the most aggressive locomotive roar available.
- All-Weather Reliability: Signature XCR 2.0™ black coating provides extreme salt-spray and corrosion resistance. (Check out Limited Edition Reaper Red and Freedom Edition)
- High-Flow Solenoid: Pre-fitted with a professional-grade VX6003 heavy-duty brass solenoid for instantaneous response and maximum decibel output.
- Universal Integration: Designed to work with any high-pressure air system (150 - 200 PSI recommended) to command immediate attention.
- Modular Architecture: Detachable horns allow for custom mounting configurations tailored to your specific vehicle chassis.
THE UNDISPUTED KING OF THE ROAD!
THE VERDICT: Designed specifically for those who want to dominate the road, the 730 Demon™ is your weapon of choice. It stands as the largest and loudest train horn in the Kleinn arsenal.
WHAT'S IN THE BOX?
- (730) The Demon™ stainless steel triple train horns: Precision-tuned trumpets on a detachable flat rack.
- (VX6003) High performance air solenoid valve: Pre-installed 1/2" NPT heavy-duty brass air valve.
- (Fitting) 1/2" Airline Connector: Compression fitting for high-flow air delivery.
- (Airline) 1/2" Airline: 12ft of Heavy-Duty Airline Rated to 200PSI.
- Installation Hardware: Heavy-duty mounting bolts and high-strength fasteners.
BOOST YOUR BLAST: 30% MORE OUTPUT
Unleash the full fury of your Demon™ 730 Train Horns!
Experience the Demon™ 730 Horns in all their glory! The Ultra BlastMaster™ (6890) re-engineers your system’s architecture, maximizing airflow to deliver a devastating, high-decibel blast. It’s simple physics: more air equals more output. We ditched the standard 3/8” lines in favor of massive, dedicated 1/2” airlines leading to three High-Flow VX6003 brass solenoids—one for every individual horn.
This isn't just an upgrade; it’s a shocking twist on a classic, delivering soul-shaking locomotive blasts that command immediate attention. Overwhelm the senses and dominate the streets with the absolute peak of train horn intensity at your fingertip.
TOO LOUD? TOO BAD!
⚠️ SYSTEM REQUIREMENTS & COMPATIBILITY
The "Demon" 730 is the official replacement for the following Kleinn Systems:
- Universal ProBlaster™ Train Horn Kits: Models HK9 and HK9-Slimline
- Vehicle-Specific Systems: Models ending in "734"
Kleinn 730 train horns require compressed air set at 140 PSI to 200 PSI and a minimum 3-Gallon air tank.
Recommended Kleinn onboard air systems designed specifically to power the Demon 730 horns:
- 6350 - 150 PSI 100% duty cycle sealed onboard air system
- 6450 - 150 (200) PSI Max, 100% duty cycle sealed onboard air system
Air Horns vs. Train Horns
Find Your Signature Blast
Compact Air Horn Series
Engineered for "Emergency Vehicle" authority. This series delivers a sharp, high-frequency blast designed to cut through ambient noise instantly. With 3.5" bells, these horns produce a piercing scream that commands attention in heavy traffic.
- Compact Horns: 102 / 130 / 141
- Kits: HK2 / HK3 / HK4
- Compact Horns: 101 / 102-1 / 130-1
- Kits: HK1 / HK2-1 / HK3-1 / HK4-1 / HKUTV / Vehicle Specific Kits: 102,102-1
Train Horn Series
Don’t just make noise—make an impact. Engineered with massive 6-7" bells, our Train Horns move huge volumes of air to create a deep, earth-shaking rumble. This is the authentic tone of a 40,000-lb classic locomotive.
- Train Horns: 500 / 501 / 502 / 630
- Kits: HK6 / HK8
- Train Horns: 220 / 230 / 730
- Kits: HK5 / HK7 / HK9 / HK9-Slimline / All Vehicle Specific Train Horn Kits
Professional-grade engineering. Legendary Kleinn Performance.
Too Loud? Too Bad!
Model 730 Specifications:
|
Model 730 "Demon" Steel Triple Train Horns |
|
| Warranty | 2-Year Warranty |
| Construction | Stainless Steel Trumpets, Zinc Alloy Base |
| 12-Volt Brass Solenoid | P/N- VX6003 (51238 & 53814N Fittings Incl.) |
| Max Pressure | 200 PSI |
| Output (dB) @ 150 PSI | 157.8 dB 159.6 dB with Model 6890 |
| Flat Rack Dimensions | 22.5” L x 18.5” W x 7.25” H |
| Dimensions (Each Horn) | 3 Total (21.75” Lg. - 17.75” Med. - 13.5” Sm.) |
| Minimum Tank Size | 2.5 Gallon |
| Airline Length & Size Included | 12’ of ½” Airline |
| Upgrade Kit Compatibility | Use Model 6890 |
Installation Instruction Links:

$599.95