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Model 730: The "Demon" Stainless Steel Triple Train Horns
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KL 730FE
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$599.95
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$599.95
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This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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! Delivering a sonic roar that cuts through sirens and traffic, these precision tuned steel horns offer the deep rumble of an authentic 40,000-lb locomotive.
XCR 2.0™ Extreme Durability & Modular Mounting
Featuring our signature XCR 2.0™ salt-spray resistant coating, the Demon 730 thrives in harsh environments. The stainless steel construction ensures internal components won't succumb to corrosion. While mounted on a heavy-duty flat rack, each trumpet can be removed for maximum installation flexibility.
WHY CHOOSE THE "DEMON” 730 HORNS?
- Unmatched Volume: Loudest stainless-steel triple horn with 1/2" high-flow air delivery.
- Heavy-Duty Architecture: Precision-tuned stainless steel trumpets for an aggressive roar.
- All-Weather: Signature XCR 2.0™ black coating provides extreme corrosion resistance (check out our limited edition 730RR and 730FE).
- High-Flow Solenoid: Pre-fitted with a VX6003 heavy-duty brass solenoid for maximum output.
THE VERDICT: Designed for those who want to dominate the road, the Demon 730 is your weapon of choice. It stands as the largest and loudest train horn in the Kleinn arsenal.
BOOST YOUR BLAST: 30% MORE OUTPUT
The Ultra BlastMaster™ (6890) utilizes massive, dedicated 1/2” airlines to three high-flow brass solenoids.
TOO LOUD? TOO BAD!
⚠️ SYSTEM REQUIREMENTS
Official replacement for Universal ProBlaster™ Kits (HK9 / HK9-Slimline). Requires air systems at 140 to 200 PSI and a min. 3-gallon tank. Recommended onboard air systems: Models 6350, 6450-Slim, and 6450.
Air Horns vs. Train Horns
Find Your Signature Blast
The Screamer
Compact Air Horn Series
High-frequency emergency vehicle authority. 3.5" bells create a piercing scream that cuts through ambient noise instantly.
Chrome: 102/130/141 (HK2-HK4) | Black: 101/102-1/130-1 | (HK1-HK4) | Vehicle Specific Kits
The DEEP Rumble
Train Horn Series
Authentic locomotive tone. Massive 6-7" bells move huge volumes of air to create a deep, earth-shaking locomotive rumble.
Chrome: 500/501/502/630 (HK6/HK8) | Black: 220/230/730 | (HK5-HK9) | Vehicle Specific Kits
Too Loud? Too Bad
| Model 730 "Demon" Specifications | |
| Warranty / Construction | 2-Year Warranty / Stainless Steel & Zinc Alloy |
| Solenoid / Max PSI | VX6003 (Fittings Incl.) / 200 PSI max |
| Output @ 150 PSI | 157.8 dB (159.6dB w/ BlastMaster Upgrade Kit) |
| Dimensions (Rack) | 22.5” L x 18.5” W x 7.25” H |
| Min Tank / Airline | 2.5 Gallon / 12’ of ½” Airline |
Installation Instruction Links:

Model 730: The "Demon" Stainless Steel Triple Train Horns
$599.95
Does it come with a warranty?
Kleinn Automotive Accessories Limited Warranty
Kleinn Automotive Accessories stands behind the quality and craftsmanship of our products. Our products are covered against defects in materials and workmanship when properly installed and used under normal operating conditions, subject to the terms below.
One-Year Limited Warranty
Unless otherwise specified, Kleinn Automotive Accessories products are covered by a 1-year limited warranty from the original date of purchase.
This warranty applies to the original purchaser and covers defects in materials and workmanship under normal use.
If a product is determined to have a covered warranty defect, Kleinn Automotive Accessories will, at its discretion, repair or replace the defective product or component.
What Is Not Covered
This warranty does not cover damage or failure resulting from:
- Improper installation
- Misuse, abuse, or improper operation
- Use outside the product's intended application or specifications
- Modification or alteration of the product
- Accidents or physical damage
- Electrical damage
- Environmental damage or exposure
- Normal wear and tear
Kleinn Automotive Accessories is not responsible for installation or removal charges, diagnostic fees, labor costs, vehicle downtime, loss of use, or other incidental or consequential expenses associated with warranty service.
Warranty Claims
To request warranty service, email warranty@kleinn.com with the following information:
- A copy of your original sales receipt or proof of purchase
- Your full name
- Email address
- Telephone number
- A brief description of the issue
A Kleinn representative will review your claim and may first attempt to resolve the issue through technical support.
If the product needs to be returned for inspection, Kleinn will provide a Return Authorization (RA) number and return instructions. Products should not be returned without prior authorization.
Once received, the product will be inspected to determine whether the issue is covered under warranty. If a covered defect in materials or workmanship is confirmed, Kleinn will, at its discretion, repair or replace the defective product or component.
If inspection determines that the product does not have a covered warranty defect, the product may be returned to the customer, and the customer will be responsible for applicable return shipping costs.
This limited warranty gives you specific legal rights. You may also have other rights, which vary from state to state.
Kleinn Automotive Accessories
4045 N. Highway Drive, Tucson, AZ 85705
Tel (520) 579-1531
What's the returns policy?
How To Return An Item
Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. You must return the item within 30 days of your purchase.
1. Please email support@kleinn.com to request a refund and we will assign you a Return Authorization #.
2. Mail your returned item to:
Kleinn Automotive Accessories
Returns Department
4045 N Highway Drive
Tucson, AZ 85705
3. Include in your package a signed letter stating the reason for your return and the original receipt.
Return Non-Exceptions
Merchandise that has been worn, used, or altered will not be accepted for return or exchange.
Restocking Fee
All returns are subject to a 15% restocking fee, which will be deducted from your refund. If shipping and handling fees were applied to your order, they are non-refundable.
Customer Reviews
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