> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/sic/3651/ # SIC code 3651: Manufacturing home audio and video equipment The companies classified under SIC 3651, where they are based, how big they are and how the code maps to NAICS. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** SIC 3651 is the Standard Industrial Classification code for Manufacturing home audio and video equipment, in division D (Manufacturing). The companies counted under it are mostly small: 82% have 200 or fewer employees. ## What is SIC 3651? SIC 3651 is the Standard Industrial Classification code for Manufacturing home audio and video equipment. It sits in division D, Manufacturing. The first two digits name the major group, and the last two narrow it to a single industry. Most of the companies counted also carry NAICS 334310 (77%). - 43% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (45%). Within the US, California is the biggest state (39%). - Most were founded in the 2000s (23%), then the 1990s (21%). **Figure: How SIC 3651 is built.** The code 3651 split into its parts: major group 36, then industry group and industry. It sits in division D, Manufacturing. *The four digits of SIC 3651.* ## Which companies are classified under SIC 3651? The biggest by headcount range include Knowles, Wiwynn, Newsan, Sonos and L-Acoustics. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | Knowles | Itasca, IL | 10,001+ | | Wiwynn | New Taipei City, Taiwan | 10,001+ | | Newsan | Buenos Aires, Argentina | 5,001 to 10,000 | | Sonos | Santa Barbara, CA | 1,001 to 5,000 | | Qsc | Costa Mesa, CA | 501 to 1,000 | | Vizio | Irvine, CA | 501 to 1,000 | | Foxconn Slovakia | Nitra, Slovakia | 501 to 1,000 | | Ahuja Radios | New Delhi, India | 501 to 1,000 | | Savant Systems | Hyannis, MA | 201 to 500 | | Arlo Technologies | Milpitas, CA | 201 to 500 | | Rcf | Reggio Emilia, Italy | 201 to 500 | | Klipsch Group | Indianapolis, IN | 201 to 500 | | Lautsprecher Teufel | Berlin, Germany | 201 to 500 | | Westway Electronics | Noida, India | 201 to 500 | | Videotex International | Noida, India | 201 to 500 | | Topview Optronics | Taoyuan City, Taiwan | 201 to 500 | | Dpa Microphones | Kokkedal, Denmark | 51 to 200 | | Paradigm Electronics | Mississauga, Canada | 51 to 200 | | Nexo | Plailly, France | 51 to 200 | | Dispelix | Espoo, Finland | 51 to 200 | | Scosche Industries | Oxnard, CA | 51 to 200 | | Trinnov Audio | Neuilly-Plaisance, France | 51 to 200 | | Monitor Audio | Essex, United Kingdom | 51 to 200 | | Fohhn Audio | Nurtingen, Germany | 51 to 200 | | Wyrestorm Technologies | Round Lake, NY | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are SIC 3651 companies based? The largest groups are headquartered in the United States (45%), Germany (10%) and the United Kingdom (8%). **Figure: Where companies in SIC 3651 are based.** Bars for the share of counted companies in SIC 3651 headquartered in each country: United States 45%, Germany 10%, United Kingdom 8%, India 6%, Italy 5%, Taiwan 4%, Switzerland 3%. *Share of counted companies in SIC 3651 by headquarters country.* Within the United States, California (39%), New York (12%) and Massachusetts (10%) lead. **Figure: US headquarters of companies in SIC 3651, by state.** A tile map of the United States shaded by the share of counted US companies in SIC 3651 headquartered in each state. The largest are California 39%, New York 12%, Massachusetts 10%. *Share of counted US companies in SIC 3651 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for SIC 3651? 43% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in SIC 3651.** Seven columns for the share of counted companies in SIC 3651 in each employee range: 11 to 50 43%, 51 to 200 39%, 201 to 500 8%, 501 to 1,000 5%, 1,001 to 5,000 2%, 5,001 to 10,000 1%, 10,001+ 2%. *Share of counted companies in SIC 3651 in each employee range.* ## How old are SIC 3651 companies? Most were founded in the 2000s (23%), then the 1990s (21%). **Figure: When companies in SIC 3651 were founded.** Eight columns for the share of counted companies in SIC 3651 founded in each era: Before 1960 9%, 1960s 3%, 1970s 14%, 1980s 13%, 1990s 21%, 2000s 23%, 2010s 16%, 2020s 0%. *Share of counted companies in SIC 3651 by the era they were founded in, for the ones that list a founding year.* ## How SIC 3651 compares - 43% of companies in SIC 3651 have 50 or fewer employees, against 60% across all NAICS codes on this site. - 16% were founded in 2010 or later, against 30% across all NAICS codes on this site. - Massachusetts holds 10% of the US companies here, against 3% across all NAICS codes on this site. ## SIC 3651 and the NAICS system NAICS replaced SIC as the U.S. federal standard in 1997, but the two do not line up one to one. These are the NAICS codes seen most among the companies counted under SIC 3651. | Code | Title | Share of counted | | --- | --- | --- | | NAICS 334310 | Audio and Video Equipment Manufacturing | 77% | | NAICS 423690 | Other Electronic Parts and Equipment Merchant Wholesalers | 5% | | [NAICS 334210](https://enrich.chat/naics/334210/) | Telephone Apparatus Manufacturing | 3% | | NAICS 334419 | Other Electronic Component Manufacturing | 3% | | [NAICS 541511](https://enrich.chat/naics/541511/) | Custom Computer Programming Services | 3% | ## How do SIC 3651 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Appliances; Electrical; and Electronics Manufacturing (42%), Computers and Electronics Manufacturing (29%) and Consumer Electronics (9%). **Figure: How companies in SIC 3651 describe themselves.** Bars for the share of counted companies in SIC 3651 that give each industry on their public profile: Appliances; Electrical; and Electronics Manufacturing 42%, Computers and Electronics Manufacturing 29%, Consumer Electronics 9%, IT Services and IT Consulting 4%, Media Production 4%, Musicians 4%. *Share of counted companies in SIC 3651 by the industry they list on their public profile.* ## Where SIC codes come from SIC was created in the 1930s and is now historical: the U.S. government replaced it with NAICS in 1997. It is still widely used, and the SEC still assigns a SIC code to every company that files on EDGAR. The full list is in the [SIC manual](https://www.osha.gov/data/sic-manual) that OSHA hosts, and the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html) explains how the two relate. ## How do you reach the people at SIC 3651 companies? The people to talk to are usually operations, supply chain and procurement leaders. You can build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with SIC code 3651 (Manufacturing home audio and video equipment) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with SIC code 3651, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Other SIC codes in major group 36: [SIC 3677: Manufacturing electronic coils](https://enrich.chat/sic/3677/) ## Frequently asked questions ### What is SIC code 3651? SIC 3651 is the code for Manufacturing home audio and video equipment, in division D (Manufacturing). ### What is the NAICS code for SIC 3651 (Manufacturing home audio and video equipment)? 77% of the companies counted carry NAICS 334310 (Audio and Video Equipment Manufacturing), but the two systems do not map one to one. ### Which companies are classified under SIC 3651? The biggest by headcount range include Knowles, Wiwynn, Newsan, Sonos and L-Acoustics. The page lists 25 with links to their profiles where we have them. ### How big are the companies in SIC 3651? 43% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### Is SIC still used? Yes. The U.S. government replaced SIC with NAICS in 1997, but SIC codes are still common in business databases, and the SEC still uses them on EDGAR. ## Try this prompt Find the people at SIC 3651 companies ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with SIC code 3651, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [SIC 3677](https://enrich.chat/sic/3677/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)