- +Startling semi-truck volume for $31, per owner reports
- +4.4/5 owner average across 263 Amazon ratings
- +Complete kit: relay harness, wiring diagram, hardware
- +Chrome-plated zinc-aluminum trumpet, not bare ABS
- +Compact tankless format fits motorcycles and boats
- +Can keep the factory horn button as the trigger
- −150 dB claim has no test distance and is heavily inflated
- −Single trumpet gives one note, not a train-horn chord
- −Durability reports: melted wires, breakage, corrosion
- −No published weight, frequency, or warranty terms
- −No official brand website or direct support channel
- −Clean installs can take hours, especially on motorcycles
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: August 6, 2026. Farbin does not operate a standalone brand website — it sells through Amazon, Walmart, and marketplace resellers — so our primary spec source is the brand’s official Amazon listing (ASIN B084Q22G1T), cross-checked against secondary retail listings and aggregated owner feedback.
Quick verdict
The Farbin 18-Inch Single Trumpet Air Horn Kit is one of the cheapest ways to put a genuinely startling air-horn blast on any 12-volt vehicle: a long chrome-plated zinc-alloy trumpet, a small self-contained compressor, and a safety relay harness for $30.99. Owners rate it 4.4/5 across 263 Amazon ratings, and the recurring theme is disbelief at how loud it is for the money — one Jeep Gladiator owner sums it up as sounding like a semi truck. What it is not is a 150 dB train horn: that headline number is advertised with no test distance, and compact tankless kits like this realistically land far below it. We rate it 3.3/5 — strong value and surprisingly well-liked, held back by inflated marketing, a one-note voice, and mixed durability reports.
What it is
The Farbin FB-JQLB is a single-trumpet electric air horn kit built around one long, chrome-plated zinc-aluminum trumpet — advertised as 18 inches, with the Amazon spec table listing overall dimensions of 17.5 × 4.33 × 3.94 inches. Instead of a tank-based air system, a compact 12V compressor with a red copper coil feeds the trumpet through a short air line, so there is no tank, pressure switch, or plumbing to install. We cover the trade-offs of that format in our tankless train horns guide.
Farbin is a marketplace horn brand (the listing names Ruian City Allrey E-Commerce Ltd. as manufacturer, and the brand story dates the operation to 2014) that sells almost exclusively through Amazon and other retail marketplaces. There is no official spec sheet beyond the listing and no brand-direct support channel. For the rest of the lineup, see our Farbin reviews hub.
The pitch is universality: per the Amazon listing, the kit suits any 12V vehicle — cars, pickups, Jeeps, off-road vehicles, trucks, vans, SUVs, motorcycles, even boats. Because it is one trumpet with an integrated air source, it is compact enough for applications where a four-trumpet tank kit would never fit. The trade-off is the voice: a single trumpet produces one note, not the layered chord that makes real train horns sound the way they do — our single vs dual vs quad trumpet guide explains why trumpet count matters more than advertised decibels.
This kit is for a driver or rider who wants a dramatically louder, deeper horn than stock for about $30 — not for someone chasing an actual locomotive blast.
Specifications
| Spec | Value |
|---|---|
| Model | FB-JQLB (ASIN B084Q22G1T) |
| Advertised sound output | 150 dB (test distance not disclosed) |
| Trumpets | 1, advertised as 18 in |
| Overall dimensions | 17.5 × 4.33 × 3.94 in (L × W × H) |
| Trumpet material | Zinc-aluminum alloy, vacuum chrome plating (silver or black) |
| Power source | 12V DC tankless compressor (red copper coil), connected by air line |
| Wiring | Safety relay harness kit with wiring instruction picture |
| Fitment | Universal 12V — cars, trucks, SUVs, vans, motorcycles, boats |
| Chord frequencies | Not disclosed |
| Weight | Not disclosed |
| Warranty | Not disclosed |
| Price | $30.99 (Amazon, August 2026) |
| Owner rating | 4.4/5 from 263 Amazon ratings (69% 5-star) |
The gaps matter. No test distance for the dB claim, no frequency, no weight, no stated warranty. As we detail in our advertised vs real-world decibels guide, the same “150 dB” figure is printed on everything from $30 horns to four-figure tank systems; in our editorial estimation, a compact tankless single-trumpet kit like this one realistically meters somewhere in the 110–120 dB range up close — seriously loud, and far above a stock horn, but not train-horn territory.
What’s in the box
- 18-inch chrome-plated single trumpet
- Self-contained 12V air compressor (connects to the trumpet via air line)
- Safety relay harness kit
- Wiring instruction diagram
- Mounting hardware
Owner feedback confirms the kit is complete: one verified buyer writes that it “comes complete with everything you need to mount and wire up including relay.” Another notes the directions are easy to follow and that tapping the factory horn wire as the trigger lets you keep the stock horn button.
Pros
- Genuinely startling volume for $31 — owners describe it as sounding like a semi truck, not a beefed-up car beep
- Strong owner satisfaction: 4.4/5 across 263 Amazon ratings, 69% of them 5-star
- Complete kit — relay harness, wiring diagram, and mounting hardware included, with no air tank or plumbing to buy
- Chrome-plated zinc-aluminum trumpet rather than bare ABS plastic
- Compact tankless format fits motorcycles, cars, and boats where tank kits can’t go
- Wiring supports keeping the factory horn button as the trigger
Cons
- 150 dB claim carries no test distance and is heavily inflated — expect real-world output far lower
- Single trumpet means a one-note blast, not a train-horn chord
- Durability is the weak spot in owner feedback: reports of melted wires, plastic breakage, and internal corrosion
- QC misses reported — a broken terminal on install, a trumpet that arrived dented
- No published weight, frequency, or warranty terms; no brand website or direct support
- Clean installs can take real effort — one motorcycle owner reports nearly five hours to hide the compressor and relay
Alternatives
- Farbin Dual Trumpet Train Horn Kit — the same brand’s $37 two-trumpet version adds a second note for a fuller tone in the same tankless format. See our Farbin dual trumpet review.
- Vevor 4-Trumpet Train Horn — roughly triple the money buys four trumpets and a more train-like chord, with its own inflated dB marketing. See our Vevor 4 Trumpet review.
- Wolo Bad Boy 419 — a compact self-contained dual-tone horn from an established US brand that publishes real specs and backs them with support. See our Wolo Bad Boy 419 review.
The pattern across this price tier is consistent: nothing tankless sounds like a real train horn. If the chord is what you’re after, the jump to a tank-based kit — see our budget picks under $200 — is the single biggest upgrade you can make.
Install / compatibility notes
Installation is purely electrical plus one short air line between the compressor and trumpet — no tank to mount or drain. The essentials:
- Mount the trumpet with the opening angled down or level so water can’t pool inside, and keep it clear of hot components. One F-150 owner fabricated two metal bands to stand the horn off the radiator — check your clearance against the 17.5-inch length before buying.
- Mount the compressor somewhere dry and protected (an owner used the battery box) and route the air line away from pinch points and heat.
- Wire through the included safety relay per the instruction picture, with power run to the battery. Tapping the factory horn wire as the relay trigger keeps your stock horn button; our relay wiring guide covers the same layout generically.
On motorcycles, plan extra time: a Yamaha rider reported the bike’s horn circuit wouldn’t drive the relay as-is, so they added a standalone button switch and spent close to five hours on a clean install hiding the compressor and relay. The listing also sells this horn family in multiple variants (silver and black, single and dual trumpet), so confirm you’re ordering the 12V single before checkout — and if your vehicle is 24V, this kit is not for you; see our 12V vs 24V guide.
Sources
- Amazon — FARBIN 12V Air Horn Kit, 18-Inch Chrome Single Trumpet (ASIN B084Q22G1T) — price, 150 dB claim, dimensions, materials, compressor description, kit contents, fitment claims, model number, manufacturer identity, owner rating, star distribution, and verified-review excerpts on loudness, install effort, and durability
- Walmart — FARBIN 12V 150db Air Horn Kit, 18-Inch Chrome Zinc Single Trumpet — secondary retail availability cross-check
Train Horn Hub aggregates publicly available data. We do not test products in-house. All trademarks belong to their respective owners.
A $31 way to give any 12-volt vehicle — motorcycles included — a genuinely startling semi-truck blast with everything needed in the box; just buy it as a very loud single air horn, because the advertised 150 dB train-horn rating is marketing, not reality.
Frequently asked questions
Quick answers to the questions people ask most about this topic.
- Is the Farbin 18-inch single trumpet horn really 150 dB?
- No independent measurement supports that. The 150 dB figure is Farbin's advertised rating with no test distance disclosed, and in our editorial estimation a compact tankless single-trumpet kit realistically lands in the 110-120 dB range up close. Owners still consistently report it is dramatically louder than any stock horn.
- Does this Farbin horn need an air tank?
- No. A small self-contained 12V compressor feeds the trumpet through a short air line, so there is no tank, pressure switch, or air plumbing. Installation is the relay wiring plus mounting the trumpet and compressor.
- Can I install the Farbin single trumpet horn on a motorcycle?
- Yes — the listing covers any 12V vehicle including motorcycles, and rider reviews confirm it works. Plan for extra effort, though: one Yamaha owner needed a standalone button switch because the bike's horn circuit wouldn't trigger the relay, and spent close to five hours on a clean install.
- What comes in the box with the Farbin FB-JQLB kit?
- The 18-inch chrome trumpet, the 12V compressor, a safety relay harness kit, a wiring instruction diagram, and mounting hardware. Owners confirm the kit includes everything needed to mount and wire it.
- Does the Farbin 18-inch air horn come with a warranty?
- Farbin does not publish warranty terms on the listing, and there is no brand website or direct support channel. In practice buyers rely on Amazon's standard return window and marketplace customer service.
