Audio and Video Equipment Manufacturing (U.S.) — NAICS 33431

A Histometrics rollup primer for public-market and private investors.

Read this first: NAICS (North American Industry Classification System) code 33431 is a rollup level that contains exactly one child industry, 334310. The two are effectively identical — everything at this level is the audio-and-video equipment industry. This page gives the level's own federal figures and a fast orientation; for the full treatment of companies, economics, and strategy, see the 334310 primer.

1. Overview

This is the industry that designs and builds the speakers, soundbars, headphones, home-theater receivers, gaming headsets, microphones, public-address (PA) rigs, instrument amplifiers, action cameras, and — by classification — the televisions Americans listen to and watch.[1] The one thing an investor must hold onto: the U.S. domestic manufacturing footprint is small and shrinking, while the U.S. brand footprint is large and global. Almost all consumer audio-video (AV) gear sold in America is physically made in Asia, so the federal "manufacturing" statistics — roughly $4–5 billion of domestic output depending on which series you use — dramatically understate what this industry is in economic terms.[2][3][4]

The second thing: the domestic base is getting more productive even as it employs fewer people. Between 2019 and 2024, audio and video equipment posted the fastest labor-productivity growth of any manufacturing or mining industry the Bureau of Labor Statistics (BLS) examined — 11.2% a year, with real output up 8.6% a year against hours worked down 2.4% a year.[5] What is left on U.S. soil is a smaller, sharper base, not simply a dying one.

2. What's inside — and why this level equals its one child

NAICS builds up in tiers: broad sectors (2-digit) split into subsectors (3-digit), industry groups (4-digit), NAICS industries (5-digit), and national industries (6-digit). NAICS 33431 sits at the 5-digit "industry" tier, and it has a single 6-digit child:

Because there is only one child, this level is a pass-through: its scope, its companies, and its statistics are the same as 334310's. The rollup exists only to keep the classification tree consistent — it adds no economic content of its own. Everything in scope (home audio, headphones and earbuds, microphones and PA, instrument amplifiers, car audio, household video cameras, and television sets) and everything explicitly out of scope (broadcast/transmitting gear → 334220; musical instruments themselves → 339992, so a Fender guitar is 339992 but a Fender amplifier is 334310; telephones and smartphones → 334210/334220; blank/recorded media → 334614; wholesale and retail distribution → 423/443) is defined at the child.[1] For any of that detail, go straight to the 334310 primer.

3. How big it is (this level's figures)

Because the level and its child are the same industry, the rollup figures equal the child's. These are our ingested ground-truth federal statistics for NAICS 33431:

Two series, two answers — use both. The Census and BLS measures differ by construction rather than by error, and an investor should carry both numbers. On output, sectoral output ($4.39 billion) adjusts shipments for inventories and strips out intra-industry transactions, which is why it sits below the Census receipts figure (~$5.09 billion).[3][4] On employment, County Business Patterns counts about 10,977 payroll employees at 539 establishments, while the BLS series — which adds unincorporated self-employed and unpaid family workers — counts about 19,700.[6][7] The BLS series also carries the long structural story: 19,700 jobs in 2025 against 60,300 in 1987.[7]

Undercount caveat — central here. These numbers describe domestic manufacturing establishments only. An HHI of 682.8 is technically "unconcentrated" (below the 1,500 threshold antitrust regulators use), and a CR4 of 43.6% looks moderate.[3] But that only measures the handful of U.S. factories. The AV market Americans actually experience is far larger and, by brand, far more concentrated — Apple, Samsung, Sony, Bose, and Sennheiser command most consumer spend, and the bulk of that hardware is imported.[2] Read the ~$4–5 billion / ~11,000–20,000-worker figures as "what's left being built on U.S. soil," not "the size of the U.S. audio-video business." A further, smaller undercount: much domestic activity sits in tightly held private and family-owned firms whose economics never surface fully in public data.

4. Investable universe (where value concentrates)

With one child, there is no cross-industry allocation to weigh — 100% of this level's investable value sits in 334310. What the level's own shape tells you is that the listed pond is shallow and the largest listed name is not a manufacturer at all:

• Listed pure-plays are few and mostly small-cap: Sonos (premium home speakers and soundbars, ~$1.44 billion FY25 revenue, down 4.9%), GoPro (action cameras, ~$652 million in 2025, hardware down 21.5%), Turtle Beach (gaming headsets, ~$373 million in 2024), Universal Electronics (connected-home control, ~$395 million in 2024), and Koss (micro-cap headphones, ~$12 million in 2024).[9][10][11][12][13]
• The highest-quality adjacent name is a licensor, not a maker. Dolby Laboratories earned ~$1.27 billion in FY24, about 93% of it royalties at roughly 89% gross margin — exposure to the proliferation of AV devices with none of the factory or inventory risk.[14]
• Diversified giants — Apple, Sony, Samsung (which owns Harman) — offer AV exposure buried inside far larger businesses. So does Gentex after its 2025 VOXX purchase: premium audio contributed $151.3 million of sales and $8.3 million of operating income on a partial year, only about 6% of consolidated sales, so the stock remains an automotive-electronics investment.[15]
• Much of the real value is private or subsidiary-held: Bose, Shure, Fender, and the Samsung-owned Harman empire (JBL, Harman Kardon, AKG, Mark Levinson, Revel, and, since September 2025, the former Sound United brands).

Tickers, market values, per-company detail, and the full private/subsidiary map live in the 334310 primer, section 4.

5. How the money works

Same model as the child: a consumer-discretionary hardware business with a premium-brand overlay. Owners make money on volume × average selling price (ASP) minus bill of materials (BOM); for high-volume audio the BOM is often held near 20–25% of retail price, which is one reason production is hard to move out of China without eroding margins.[2] Premium brands defend 40%+ gross margins through design, sound quality, and ecosystem lock-in, while commodity gear competes on price. Most "manufacturers" are asset-light — they own the brand, industrial design, and intellectual property (IP) and outsource assembly to Asian contract manufacturers — so profit comes from brand premium and IP rather than from owning plants.

Two cautions the child now makes concrete. First, gross margin is not profit: Sonos posted a 43.7% gross margin in FY2025 alongside a $50.5 million operating loss and a $61.1 million net loss, because volume was inadequate to absorb R&D and selling costs.[9] Second, asset-light is not risk-light: Sonos ended FY2025 with roughly $173 million of open finished-goods purchase orders and $131–149 million of expected component commitments, so a demand miss lands as inventory, not just as lost sales.[9] Sales also concentrate in the holiday quarter — GoPro took 31% of 2025 revenue in Q4.[10] Two structural variants matter at the top end: licensing (Dolby's royalty on every device shipping its format — high margin, low capital) and patent litigation as a profit center (Sonos's speaker-patent win against Google).[14][16] Full detail is in the 334310 primer, section 5.

6. Demand drivers

Unchanged in shape from the child: TV and home-theater upgrade cycles (thin 4K/8K TVs with weak built-in speakers drive soundbar "attach" sales); format transitions (surround → Dolby Atmos and spatial audio, which also feed Dolby's royalties);[14] gaming headsets;[12] the creator/streaming and remote-work boom (microphones, headphones, webcams); housing and remodeling (custom-installed whole-home audio); automotive infotainment; and premiumization/smart-home speakers.

The children now add two quantified drivers worth carrying up. Streaming is the connectivity engine: the U.S. had 106.5 million paid music-subscription accounts in 2025, with streaming revenue of $9.47 billion, 82% of recorded-music revenue — supporting networked speakers and headphones, but also handing streaming and operating-system platforms strategic leverage over hardware brands.[17] And professional AV is becoming networked infrastructure: AVIXA forecasts the broad global pro-AV products-and-services market rising from $332 billion in 2025 to $402 billion in 2030, a figure that includes software, services, integration, displays, and much that falls outside NAICS 334310 — treat it as directional, not as this industry's size.[18] See the 334310 primer, section 6.

7. Regulation

No level-specific rules exist — regulation applies to the products, i.e., at the child. The headline items: FCC (Federal Communications Commission) equipment authorization under 47 CFR Part 15, where deliberate RF emitters (Bluetooth/Wi-Fi speakers, wireless mics) need full certification through an FCC-recognized accredited laboratory while incidental emitters use the lighter Supplier's Declaration of Conformity;[19] DOE, Energy Star, and California Energy Commission efficiency standards; materials and e-waste rules (RoHS-style restrictions, state recycling laws, California Proposition 65); CPSC lithium-battery safety and FTC "Made in USA" oversight; and — the single biggest swing factor — trade policy.[20][21]

Tariffs are no longer an abstraction at this level; the child now carries the arithmetic. GoPro reported U.S. tariffs on cameras made in Thailand and Malaysia rising from 10% to 19% in August 2025, and Gentex said unrecovered tariffs cut its 2025 consolidated gross margin by roughly 110 basis points net of recoveries.[10][15] Note that both examples involve non-Chinese sourcing: diversifying out of China moves the exposure rather than eliminating it. Detail in the 334310 primer, section 7.

8. Consolidation

The domestic-factory data looks fragmented (CR4 43.6%, HHI 682.8), but the brand landscape is consolidating fast, and 2025 was a landmark year.[3] Samsung's Harman — bought in 2017 for approximately $8.02 billion and since run as the aggressive roll-up — acquired the former Sound United portfolio (Denon, Marantz, Polk, Bowers & Wilkins, Definitive Technology) for $350 million, closing in September 2025.[22][23] That price is the story: Masimo had paid roughly $1 billion for the same brands in 2022, a cautionary marker on what audio brands fetch outside a strategic owner.[22] Separately, Gentex bought VOXX (Klipsch, Onkyo, Pioneer) for ~$196 million, closing April 2025, folding storied audio names into an auto-parts company where they now sit at about 6% of sales.[15]

The through-line: independent U.S. pure-plays are being absorbed or squeezed, while durable value shifts to diversified global platforms and licensing. Full account in the 334310 primer, section 8.

9. Risks

The same risk set as the child: import competition and commoditization (thin hardware margins); tariff and supply-chain dependence on China, Vietnam, Malaysia, and Thailand (including rare-earth magnets), where geographic diversification shifts exposure rather than removing it;[9][10][20] supply-chain concentration in a limited number of contract manufacturers and sole-source components with long lead times, so a forecast error becomes either a launch shortage or dead inventory;[9] cyclicality (discretionary, housing-linked, holiday-concentrated); technology and platform disruption (smartphones absorbing functions — GoPro names phone and tablet cameras as a direct substitute — plus dependence on Apple/Google/Amazon ecosystems, whose owners can subsidize hardware to monetize services);[9][10] execution and hit-driven demand (Sonos's 2024 app failure); customer concentration among a few big retailers; and, for licensors, royalty-renewal and standard-adoption risk.[14] See the 334310 primer, section 9.

10. How to invest, and the outlook

Because 33431 is its one child, portfolio construction is identical to 334310. Public routes are a short, mostly small-cap list — Sonos (flagship brand play), GoPro (action cameras), Turtle Beach (gaming), Universal Electronics (connected-home control), Koss (micro-cap) — with Dolby as the highest-margin adjacent licensing name and Apple/Sony/Samsung as diversified indirect exposure. Private routes are where much of the value and deal flow lives: brand-focused private equity, direct ownership of premium brands (Bose, Shure, Fender), and the contract-manufacturing supply chain. The 2023 sale of Bose Professional to Transom Capital is the template for mid-market carve-outs.[24] Private underwriting should separate brand value from manufacturing value — SKU and channel economics, retailer and OEM concentration, non-cancellable component and tooling commitments, contract-manufacturer concentration, tariff origin, and freedom to operate. Near-term, watch tariffs and reshoring (the dominant variable), format cycles (Atmos/spatial audio), gaming and creator hardware, and continued brand consolidation.[21]

Bottom line: NAICS 33431 is a one-child rollup that is, for every practical purpose, the audio-and-video equipment industry itself — a modest, mature, import-exposed U.S. manufacturing base (~$4–5 billion of domestic output, ~11,000–20,000 workers depending on the measure) sitting beneath a large, global, consolidating brand economy.[3][4][6][7] Federal manufacturing figures materially understate the industry's true consumer footprint because most of the gear, and most of the value, is made offshore or captured by IP and brand.[2][3] The best public returns have come from licensing (Dolby) and well-run niche brands rather than from commodity hardware. For the complete analysis, read the 334310 primer.

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Sources

1. U.S. Census Bureau / NAICS Association, "NAICS Code 334310 — Audio and Video Equipment Manufacturing" (2022). https://www.naics.com/naics-code-description/?code=334310
2. CEPR, "China's electronics export juggernaut and lessons for the US" (2023); Forbes Tech Council, "Diversifying Your Imports: Manufacturing Consumer Electronics" (2023). https://cepr.org/voxeu/columns/chinas-electronics-export-juggernaut-and-lessons-us
3. U.S. Census Bureau, 2022 Economic Census — Concentration of Largest Firms, NAICS 33431/334310 (receipts ~$5.09 B; 506 firms; CR4 43.6%; CR8 53.8%; CR20 69.0%; CR50 83.7%; HHI 682.8) (2022). https://www.census.gov/programs-surveys/economic-census.html
4. Bureau of Labor Statistics, Industry Productivity series — NAICS 334310 sectoral output (2025): $4.393 billion. Via FRED. https://fred.stlouisfed.org/series/IPUEN334310T300000000
5. Bureau of Labor Statistics, "Productivity and Costs by Industry—2024" — audio and video equipment had the fastest labor-productivity growth of manufacturing/mining industries examined, at 11.2% per year (2019–2024); real output +8.6%/yr, hours worked −2.4%/yr (2025). https://www.bls.gov/news.release/archives/prin_04242025.pdf
6. U.S. Census Bureau, County Business Patterns, NAICS 334310 (539 establishments; 10,977 employees; ~$861 M annual payroll; ~$209 M Q1 payroll) (2023). https://www.census.gov/programs-surveys/cbp.html
7. Bureau of Labor Statistics, Industry Productivity series — NAICS 334310 employment (2025): 19,700 (includes wage-and-salary workers, unincorporated self-employed, and unpaid family workers; vs. 60,300 in 1987). Via FRED. https://fred.stlouisfed.org/data/IPUEN334310W200000000
8. U.S. Small Business Administration, Table of Small Business Size Standards, NAICS 334310 (750 employees) (2023). https://www.sba.gov/document/support-table-size-standards
9. Sonos, Inc., Form 10-K, Fiscal Year 2025 — total revenue $1,443.4 M (−4.9%); gross margin 43.7%; operating loss $50.5 M; net loss $61.1 M; ~$173 M open finished-goods purchase orders and $131–149 M component commitments (2025). https://www.sec.gov/Archives/edgar/data/1314727/000131472725000090/sono-20250927.htm
10. GoPro, Inc., Form 10-K, Fiscal Year 2025 — revenue $651.5 M; hardware −21.5%; gross margin 33.6%; net loss $93.5 M; 31% of revenue in Q4; Thailand/Malaysia camera tariffs 10% → 19% in August 2025 (2025). https://www.sec.gov/Archives/edgar/data/1500435/000150043526000006/gpro-20251231.htm
11. Universal Electronics Inc., "Fourth Quarter and Year-End 2024 Financial Results" — 2024 revenue ~$394.9 M (2025). https://investors.uei.com/news-releases/news-release-details/universal-electronics-reports-fourth-quarter-and-year-end-2024
12. Turtle Beach Corporation, "Third Quarter 2024 Results"; StockAnalysis, Turtle Beach revenue (2024 revenue ~$372.8 M) (2024). https://www.globenewswire.com/news-release/2024/11/07/2977236/0/en/Turtle-Beach-Corporation-Announces-Third-Quarter-2024-Results-and-Raises-Full-Year-Outlook.html
13. ElectroIQ, "Koss Corporation Statistics by Revenue" — 2024 revenue ~$12 M (2025). https://electroiq.com/stats/koss-statistics/
14. Dolby Laboratories, "Fourth Quarter and Fiscal Year 2024 Financial Results" — FY24 revenue $1,273.7 M, licensing 93%, gross margin ~89% (2024). https://www.prnewswire.com/news-releases/dolby-laboratories-reports-fourth-quarter-and-fiscal-year-2024-financial-results-302310222.html
15. Gentex Corporation, Form 10-K, Fiscal Year 2025 — VOXX acquisition closed April 1, 2025 for ~$196 M; premium-audio segment $151.3 M sales and $8.3 M operating income (partial-year), ~6% of consolidated sales; unrecovered tariffs reduced consolidated gross margin by ~110 bps (2025). https://www.sec.gov/Archives/edgar/data/355811/000035581126000010/gntx-20251231.htm
16. Santa Barbara Independent / Courthouse News, "Google Ordered to Pay $32.5M to Sonos over Speaker Patent Infringement" (2023). https://www.independent.com/2023/06/04/google-ordered-to-pay-32-5m-to-sonos-over-speaker-patent-infringement/
17. Recording Industry Association of America (RIAA), "2025 Year-End Music Industry Revenue Report" — 106.5 M paid music-subscription accounts; streaming revenue $9.47 B (82% of recorded-music revenue) (2025). https://www.riaa.com/riaa-reports-us-recorded-music-annual-revenue-achieves-new-high-of-11-5-billion-in-2025/
18. AVIXA, "2025 IOTA Release" — global professional-AV products-and-services market forecast: $332 B (2025) to $402 B (2030); includes software, services, integration, displays, and products outside NAICS 334310 (2025). https://www.avixa.org/resources/press-releases/avixa-research-forecasts-pro-av-industry-set-to-reach-402-billion-by-2030
19. Federal Communications Commission, "Equipment Authorization – RF Device" (47 CFR Part 15); FCC DA-24-415A1 — certification testing must be performed by an FCC-recognized accredited laboratory (2024). https://www.fcc.gov/oet/ea/rfdevice
20. Ballast Markets, "Section 301 Tariffs Explained" (2025); Eightx, "Electronics and Accessories Import Tariff Map" (2026). https://content.ballastmarkets.com/blog/2025-11-08-section-301-tariffs-explained-complete-list/
21. TeamSMT, "Tariffs, Reshoring, and Supply Chain Strategies in the EMS Industry" (2025). https://www.teamsmt.com/blog/2025-tariffs-reshoring-ems-industry
22. HARMAN / Ecoustics, "HARMAN Acquires Sound United from Masimo for $350M" — Denon, Marantz, Polk, Bowers & Wilkins, Definitive Technology; closed Sept 23, 2025; Masimo had paid ~$1 B in 2022 (2025). https://www.ecoustics.com/news/harman-masimo-consumer-audio/
23. Samsung Electronics, Public Disclosure — acquisition of Harman International for approximately $8.02 billion (2017). https://www.samsung.com/global/ir/reports-disclosures/public-disclosure-view.70719/
24. Bose Corporation, "Bose Professional Announcement" — sale to Transom Capital Group (2023). https://www.bose.com/pressroom/bose-pro-announcement