- +Four all-metal zinc-alloy chrome trumpets at a budget-quad street price
- +12V heavy-duty electric air solenoid included in the box
- +All four trumpets pre-assembled on one solid bracket — single-point mounting
- +Top factory rating in the Competition Series (155 dB vs 150 for the triple, 145 for the 46129)
- +Factory spec bullets consistent across every retailer we checked
- +Street prices run 35-45% under the listed MSRP at established truck-parts houses
- −No test distance published for the 155 dB rating, and the ±10 dB tolerance is unusually wide
- −Chord frequencies (Hz) not disclosed by the manufacturer
- −Horn-only product — compressor, tank, air line, and switching all sold separately
- −6-month warranty is short next to the 1-2 years offered by Kleinn and HornBlasters
- −Chrome-plated zinc alloy is vulnerable to rock chips and road salt
- −Very few independent sound recordings of this exact model exist online
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 30, 2026. Specifications below were cross-checked across United Pacific’s factory spec bullets as syndicated to Truck Town, Vehicle Safety Supply, Chrome Country, BTS Lighting, and FinditParts, plus owner commentary from Train Horn Forums. Where a number appears on only one retailer’s listing, we say so.
Quick verdict
The United Pacific 46152 is the quad-trumpet flagship of the company’s Competition Series — one more chrome-plated zinc-alloy trumpet than the 46151 triple we’ve already reviewed, the same bundled 12V solenoid, and a factory rating that climbs from 150 to 155 dB (±10 dB, no test distance given). For roughly $146-$175 street it’s one of the cheapest ways to put four solid-metal chrome trumpets on a truck that already has onboard air. We rate it 3.8/5: strong hardware value and a one-bracket install, held back by the loosest kind of loudness claim, no frequency data, and a short 6-month warranty.
What it is
The 46152 is a four-trumpet, air-operated train horn sold under United Pacific’s “Competition Series” banner — the step-up line above the brand’s standard chrome horns like the 46129. United Pacific Industries is a California-based manufacturer best known for chrome and restoration parts for semi trucks and classic vehicles, and this horn targets exactly that crowd: owner-operators and chrome-shop customers who want maximum polished metal on the roof or deck plate of a working rig.
Like its 3-trumpet sibling, this is a horn-only product, not a kit. Four chrome-plated zinc-alloy trumpets arrive pre-assembled on a single solid bracket with a 12V heavy-duty electric air solenoid already plumbed in — you supply compressed air up to the 150 PSI maximum. Per Vehicle Safety Supply’s listing, the assembly measures roughly 15-1/2” long by 11-3/4” wide by 12” tall, and the boxed weight is about 15.6 lb. A black-coated version of the same horn exists as part number 46158 for buyers building a murdered-out truck instead of a chrome one.
Who it’s for: anyone with an existing air source — a semi’s accessory air circuit or an aftermarket compressor-and-tank system on a pickup — who wants a four-trumpet chrome cluster without paying Kleinn or HornBlasters kit money. Who it’s not for: buyers starting from zero, since compressor, tank, line, and switching are all extra.
Specifications
| Spec | Value |
|---|---|
| Model | United Pacific 46152, Competition Series |
| Sound output | 155 dB ±10 dB, manufacturer rating (test distance not disclosed) |
| Air pressure | 150 PSI maximum (operating pressure not published) |
| Trumpets | 4, pre-assembled on a single solid bracket |
| Material | Zinc alloy, chrome plated |
| Valve | 12V heavy-duty electric air solenoid (included) |
| Assembled size | ~15-1/2” L × 11-3/4” W × 12” H |
| Package size / weight | 17.3” × 13.2” × 13.9” / ~15.6 lb |
| Chord frequencies | Not disclosed |
| Included | Horn assembly, solenoid, mounting pad, mounting hardware |
| Warranty | 6 months |
| Street price | ~$146-$175 (one parts house lists a $266.71 MSRP) |
| Color variant | Black version sold as part #46158 |
The headline number deserves the same honesty note we gave the 46151. United Pacific publishes “155 db (+/-) 10 db” with no measurement distance — a tolerance wide enough to span the gap between a strong twin air horn and a genuinely painful quad. Real-world recordings of comparable quads suggest the honest way to read it is “very loud for the money,” not “louder than a locomotive.” Our guide to advertised vs real-world decibels explains why distance-free ratings should be treated as marketing ceilings; if you want to check your own install, see how to measure train horn decibels. The one encouraging sign: unlike the 46151, where one major retailer listed a conflicting dB figure, every 46152 listing we checked carries the same 155 dB ±10 dB factory bullet.
What’s in the box
- Four chrome-plated zinc-alloy trumpets, pre-assembled on a solid single bracket
- 12V heavy-duty electric air solenoid, pre-plumbed
- Mounting pad
- Mounting bolts and hardware
Not included: compressor, air tank, air line, pressure switch, relay, or horn button. Budget for a complete onboard-air system before this horn makes a sound — our air tank size guide and compressor buying guide cover what to pair with it.
Pros
- Four all-metal trumpets at a budget-quad price. Chrome-plated zinc alloy in the $146-$175 bracket, where several competing quads ship ABS bells.
- Solenoid included. The 12V heavy-duty electric valve is in the box — a part many bare-horn listings quietly leave out.
- One-bracket install. All four trumpets arrive aligned on a single solid bracket with a mounting pad, so there’s no multi-horn positioning or plumbing puzzle.
- Top factory rating in the Competition Series. 155 dB ±10 dB versus 150 for the Competition Series triple and 145 for the standard 46129.
- Consistent channel data. Every retailer listing we checked carries the same factory spec bullets — no conflicting dB figures like the ones muddying the 46151.
- Deep street discounts. Multiple established truck-parts houses sell it 35-45% under the listed MSRP, so price-shopping pays.
Cons
- No test distance on the dB rating. 155 dB ±10 dB with no measurement distance is a marketing ceiling, not a measurement.
- No frequency data. United Pacific doesn’t publish trumpet pitches, so you can’t compare its chord to a Nathan or Leslie on paper.
- Horn only. Air supply, plumbing, and switching are all extra — the real project cost is the air system.
- Short warranty. Six months, versus one to two years on comparable Kleinn and HornBlasters hardware.
- Chrome-plated zinc is finish-fragile. Rock chips and road salt will age it faster than stainless or brass, so placement matters.
- Few independent recordings. Owner demos of this exact quad are scarce online, so tone is hard to preview before buying.
Alternatives
- United Pacific 46151 Competition Series — the 3-trumpet version of this same horn: identical construction and solenoid, 150 dB factory rating, usually $15-$30 cheaper. Our 46151 review covers it in depth.
- Kleinn HK4 ProBlaster Quad — a quad-trumpet kit alternative with a longer warranty and a full air system in the box, at roughly three times the price. See our Kleinn HK4 review.
- Vixen Horns VXH4124B — another budget metal quad with a 12V solenoid, popular on pickups. See our Vixen VXH4124B review.
More options live in our United Pacific reviews hub and the single vs dual vs quad trumpet comparison.
Install / compatibility notes
The 46152 needs three things you must supply: compressed air up to 150 PSI, a switched 12V circuit for the solenoid, and a flat mounting surface that can carry roughly 15 lb of chrome through wind load and potholes.
- Air supply. On a semi, installers commonly tee off the accessory air circuit — never the brake circuit directly — through a pressure protection valve; on a pickup, plan a dedicated compressor and a 2-3 gallon tank. A quad drinks noticeably more air per blast than a triple, so tank size matters; our PSI guide and semi truck horn guide cover the details.
- Air line. Feed it with 3/8” or 1/2” line; 1/4” line will choke four trumpets badly. See the air line size guide.
- Electrical. The included solenoid is a standard 12V unit — wire it through a relay and fused feed per our relay wiring guide rather than through the factory horn circuit alone.
- Mounting. The bracket and pad are drilled for a flat surface: roof, deck plate, or frame rail. Angle the bells forward or slightly down so they drain; our mounting guide covers placement, and snow-state owners should keep the chrome out of the salt-spray zone — or buy the black #46158 and repaint chips without chrome anxiety.
Sources
- United Pacific — 4 Trumpets Air Powered Chrome Train Horn, Competition Series (46152) — official listing; origin of the factory spec bullets (155 dB ±10 dB, 150 PSI max, 12V solenoid, 6-month warranty)
- Truck Town — United Pacific 46152 4 Trumpet Chrome Horn — $174.78 price; verbatim factory bullets (155 dB ±10 dB, 12V solenoid included, 150 PSI max, 6-month warranty)
- Vehicle Safety Supply — United Pacific 46152 — $160.83 price; assembled dimensions, package dimensions, 15.6 lb weight, included items
- Chrome Country — United Pacific Competition Series 4 Trumpet Train Horn — $145.79 price, UPC, black-finish option
- BTS Lighting — 4 Trumpets Air Powered Chrome Train Horn, Competition Series — $172.00 price; zinc alloy with chrome plating construction, 15.62 lb weight, package dimensions
- FinditParts — United Pacific 46152 — $157.49 price vs $266.71 MSRP, mounting hardware confirmation
- FinditParts — United Pacific 46158 — black 4-trumpet Competition Series variant, part number confirmation
- Kleinn — Warranty Information — one-year standard / two-year select-product warranty used in the warranty comparison
- HornBlasters — Warranty Policy — one-year standard warranty used in the warranty comparison
- Train Horn Forums — United Pacific horn sound impressions — user reports on United Pacific horn tone quality and 150 PSI real-world use (brand-level, older 46115 model)
Train Horn Hub aggregates publicly available data. We do not test products in-house. All trademarks belong to their respective owners.
The 46152 is the pick for semi and heavy-truck owners with onboard air who want four solid-metal chrome trumpets for under $175 — the best hardware-per-dollar quad in United Pacific's line. Buyers who need a complete kit or a longer warranty should look at Kleinn or HornBlasters packages instead.
Frequently asked questions
Quick answers to the questions people ask most about this topic.
- How loud is the United Pacific 46152 really?
- United Pacific rates it at 155 dB ±10 dB with no test distance disclosed, so treat that as a manufacturer ceiling rather than a measured figure. Real-world output of comparable budget quads lands well below advertised peaks once measured at a standard distance, though owners describe United Pacific horns as extremely loud on a full 150 PSI system.
- What is the difference between the 46152 and the 46151?
- The 46152 carries four trumpets and a 155 dB ±10 dB factory rating; the 46151 is the same Competition Series construction with three trumpets and a 150 dB ±10 dB rating. Both are chrome-plated zinc alloy with an included 12V solenoid and a 150 PSI maximum, and the quad typically costs $15-$30 more.
- Does the 46152 come with a compressor and air tank?
- No. It is a horn-only assembly — four trumpets on a bracket, 12V solenoid, mounting pad, and bolts. You need to supply an air source such as a semi's accessory air circuit or an aftermarket compressor and tank, plus air line and a switched 12V circuit.
- What PSI does the United Pacific 46152 need?
- The maximum rating is 150 PSI; United Pacific does not publish a minimum operating pressure. Like most quads it will sound noticeably weaker below roughly 100 PSI, so a system that holds 120-150 PSI gets the most out of it.
- Is there a black version of the 46152?
- Yes. United Pacific sells the same Competition Series 4-trumpet horn with a black finish as part number 46158, with the same 155 dB ±10 dB rating, 150 PSI maximum, and included 12V solenoid.
