- +Genuine Leslie Supertyfon casting — an authentic locomotive horn, not a replica
- +Massive 5-chime output rated at 144 dB at 100 PSI, audible up to ~3.5 miles
- +Rugged die-cast aluminum body built for railway-grade duty
- +Made in the USA with a recognizable 1950s diesel-era tone
- +Classic full-chord voice that mimics a modern road locomotive
- −Eye-watering price (~$5,800) puts it out of reach for most enthusiasts
- −Standalone horn only — air system, tank, compressor and valve are all extra
- −dB figure is published without a stated test distance
- −Individual chime note frequencies (Hz) are not disclosed
- −At 25 lb and 26.5" wide it needs a serious, deliberate mounting plan
- −Only a 1-year manufacturer's defect warranty on a five-figure-adjacent purchase
Methodology
This review aggregates publicly available information from manufacturer specifications, retailer listings, and verified user reviews. We do not perform hands-on testing. Last reviewed June 21, 2026. For the Leslie RS-5T Supertyfon our primary source is the HornBlasters product listing (the authorized US dealer that publishes the AH-L5 spec sheet), cross-checked against several specialty resellers. Every number below traces to a source listed at the end.
Quick verdict
The Leslie RS-5T Supertyfon is the real deal: a genuine five-chime locomotive air horn, the kind bolted to actual diesel road power, not a budget truck replica. It earns a 4.2/5 from us for authenticity, build quality, and sheer acoustic presence — rated at 144 dB at 100 PSI and claimed audible up to about 3.5 miles. It loses points because it costs roughly $5,800, ships as a horn-only unit with no air system, and — like most horns — discloses its decibel figure without a stated measurement distance. This is a prestige purchase for collectors and serious builders, not a casual upgrade.
What it is
The RS-5T is a genuine Leslie Supertyfon — the same family of air horns that defined the sound of North American diesel locomotives from the 1950s onward. The “5” in the name denotes its chime count and the “T” its Supertyfon tuning. Where a typical aftermarket “train horn” is a set of small trumpets fed by a cheap compressor, the RS-5T is a full-size railway horn: five tuned bells on a cast manifold, voiced together to produce the broad, layered chord you hear from a passing freight.
This is emphatically not a mass-market product. It is sold through HornBlasters (part number AH-L5) as a standalone air whistle aimed at horn collectors, restorers, show-truck builders, and railroad enthusiasts who want the authentic instrument rather than an imitation. If you simply want something loud on a daily driver, this is overkill — but if you want the genuine voice of a locomotive, very little else competes.
What separates a horn like the RS-5T from the $150 four-trumpet kits is the way the chord is built. Five individually tuned bells, each a different length, sound together to produce a rich minor-leaning cluster rather than the thin two- or three-note honk of a cheap kit. That layered chord is exactly what your ear has been trained to recognize as “a train,” and it’s why genuine Leslie and Nathan castings command the prices they do. If you want the theory behind that effect, our guide to why train horns make a chord walks through the tuning and harmonics. Leslie pitched the Supertyfon line specifically for railway service, so the RS-5T is voiced for accurate, repeatable locomotive sound rather than novelty volume — though it certainly delivers the volume too.
Specifications
| Spec | Value |
|---|---|
| Type | 5-chime locomotive air horn (Supertyfon) |
| Sound output | 144 dB at 100 PSI (test distance not disclosed) |
| Audible range | Up to ~3.5 miles (manufacturer claim) |
| Operating pressure | 100 PSI |
| Chimes / trumpets | 5 |
| Chord frequencies | Not disclosed by the seller |
| Material | Die-cast aluminum body |
| Dimensions | 26.5” L x 17.5” W x 9.25” H |
| Weight | 25 lb |
| Air inlet | 1/2” NPT |
| Power source | Air (external tank + compressor required) |
| Country of origin | USA |
| Part number | AH-L5 |
| Price | $5,799.98 |
| Warranty | 1-year manufacturer’s defect warranty |
- Loudness
- 144 dB at 100 PSI (no stated distance)
- Chimes
- 5
- Inlet
- 1/2” NPT
- Weight
- 25 lb
- Price
- ~$5,800, horn only
What’s in the box
This is a horn-only purchase. The listing is explicit that you are buying the air whistle and nothing else.
- Leslie RS-5T Supertyfon five-chime air horn (P/N AH-L5)
- No air tank
- No air compressor
- No solenoid / valve kit
- No air line, fittings, or mounting hardware
Budget for a complete 100+ PSI onboard air system on top of the horn price. A horn this large wants real volume and recovery, not an entry-level compressor.
Pros
- Genuine Leslie casting. This is an authentic Supertyfon, not a small-trumpet replica — the same lineage used on real diesel locomotives.
- Enormous output. Rated at 144 dB at 100 PSI and claimed audible up to roughly 3.5 miles, it is among the loudest civilian-available horns.
- Built like railroad hardware. The die-cast aluminum body is designed for railway-grade abuse and weather.
- Authentic tone. The full five-chime chord delivers the layered, mournful voice of a modern road locomotive with a 1950s pedigree.
- USA-made. Domestic manufacture and a recognizable part number (AH-L5) make sourcing and identification straightforward.
Cons
- Price. At about $5,800 for the horn alone, it costs more than a complete high-end kit from most brands several times over.
- Horn only. You still have to buy and plumb a 100 PSI air system — tank, compressor, valve, and lines all add cost and complexity.
- dB without distance. The 144 dB figure is published with no stated measurement distance, so it can’t be compared apples-to-apples with horns rated at 3 ft.
- No published Hz. The individual chime note frequencies aren’t disclosed by the seller, which matters to purists chasing a specific chord.
- Size and weight. 26.5” wide and 25 lb means few vehicles can mount it cleanly without fabrication.
- Short warranty. A 1-year defect warranty is modest for a purchase at this price point.
Alternatives
- Leslie RS3L Supertyfon — the three-chime sibling in the same family. Same authentic Leslie pedigree and tone in a smaller, lighter, less expensive package. See our Leslie RS3L Supertyfon review.
- Leslie S-3L Supertyfon — another genuine three-chime Leslie option with a slightly different voicing; a more attainable entry into real Supertyfon sound. See our Leslie S-3L Supertyfon review.
- Nathan AirChime K5LA — the other iconic five-chime locomotive horn and the RS-5T’s most direct rival in tone and stature. If you want the genuine five-chime chord but prefer the Nathan voicing, read our Nathan AirChime K5LA review.
For context on how five-chime locomotive horns stack up against everything else, our loudest train horn ranking is a useful overview.
Install / compatibility notes
The RS-5T is a serious installation, not a bolt-on. Plan around three realities:
- You need a real air system. The horn runs at 100 PSI and breathes a lot of air across five large chimes. A small “train horn” compressor and a one-gallon tank won’t do it justice — size the system for sustained 100+ PSI delivery and quick recovery. See our air tank size guide and compressor buying guide.
- Plumb the 1/2” NPT inlet correctly. The horn uses a 1/2” NPT air inlet, and large bells like a generous line size. Don’t choke it with 1/4” tubing — our air line size guide explains why.
- Mounting is fabrication-level work. At 26.5” wide, 17.5” deep, and 25 lb, this is closer to mounting locomotive hardware than a truck accessory. Most installs go on a trailer, a show vehicle, a heavy-duty truck bed, or a static display rather than a daily commuter.
- Add a valve. Because it ships as a bare horn, you’ll need a heavy-duty solenoid or air valve rated for the flow these chimes demand.
Because of its volume and size, treat this as a controlled-use or show piece. Genuine locomotive horns are extremely loud and many jurisdictions restrict aftermarket horns on public roads — check your state’s rules before fitting one to a street vehicle.
Is it worth it? For the typical buyer chasing a loud horn for a pickup, no — a complete kit at a fraction of the price will turn heads and ship with everything you need to install in an afternoon. The RS-5T earns its money in a narrower lane: the collector who wants an authentic Leslie casting on the shelf or the wall, the restorer matching period-correct hardware, or the show builder for whom “the real thing” is the entire point. Judged as a collector-grade instrument rather than a value upgrade, it’s a strong piece — which is why our 4.2 rating reflects authenticity and build far more than dollar-for-dollar value.
Sources
- HornBlasters — Leslie RS-5T Supertyfon product page — primary spec sheet: 144 dB at 100 PSI, 3.5-mile audible claim, 26.5” x 17.5” x 9.25”, 25 lb, die-cast aluminum, 1/2” NPT, USA-made, part number AH-L5, $5,799.98, 1-year warranty, horn-only/air-system-separate note, and description text.
- HornBlasters Shopify product JSON — image gallery URLs and single-price variant confirmation.
- AirCompWorks — Leslie RS-5T listing — secondary reseller cross-check on configuration and spec sheet.
Train Horn Hub aggregates publicly available data. We do not test products in-house. All trademarks belong to their respective owners.
The RS-5T is the genuine article — a full-size 5-chime Leslie locomotive horn for the collector or hardcore builder who wants real railroad sound and has the budget and air system to match. Casual truck owners should buy a replica kit instead.
Frequently asked questions
Quick answers to the questions people ask most about this topic.
- How loud is the Leslie RS-5T really?
- The seller rates it at 144 dB at 100 PSI and claims it's audible up to about 3.5 miles away. Note that figure is published without a stated test distance, so it isn't directly comparable to horns rated at 3 feet.
- Does the RS-5T come with an air system?
- No. It ships as a standalone horn only (part number AH-L5). You must separately buy a tank, compressor, valve, and air lines capable of delivering 100 PSI.
- Is this a real locomotive horn or a replica?
- It's a genuine Leslie Supertyfon five-chime horn from the same family used on real diesel locomotives — not a small-trumpet aftermarket imitation. That authenticity is a big part of why it costs roughly $5,800.
- Why is the RS-5T so expensive?
- It's a genuine USA-made, die-cast aluminum, full-size five-chime railway horn rather than a mass-produced truck kit. At about $5,799.98 for the horn alone it's priced as a collector-grade instrument.
- Can I mount it on my truck?
- Physically yes, but it's a big job: the horn is 26.5" wide and weighs 25 lb, needs a robust 100 PSI air system, and is loud enough that many areas restrict aftermarket horns on public roads. Most installs are on trailers, show vehicles, or static displays.
