Do you mean which countries around the world make Hi-Fi equipment..
or which brands come (came) from which country? obviously the 2nd list is more interesting...so here's a few. (leaving aside questions of who now owns the particular brand, and going for the country where it came from originally....)
Now updated with rest of world outside Europe. Still dozens more to add of course...
England -
Quad, Leak, SME, Radford, Tannoy, Goodmans, Wharfedale, Decca, Kef, Soundmaster, Roberts, Murphy, Garrard, Rogers, Naim, Arcam, Cambridge Audio, Logic, Rega, Nottingham Analogue, Michell, B&W, PMC, IMF, Musical Fidelity, Mission, Gale, Avid, Ferrograph, Neal, EMS, EMI, Goldring, Syrinx, Wilson Benesch, Acoustic Energy, Audio Note, Cyrus, Chord, Creek, Epos, Harbeth, Meridian, Roksan, Russ Andrews, Onix, Origin Live, Monitor Audio, NAD, AMR, Croft, E.A.R / Yoshino, Graham Slee, Stirling, Tom Evans, Leema, Inspire, Icon, Arcaydis, AEC, Alba, Alphason, Apollo, Atacama, Audica, BBC, BIC, BSR, Bush, Black Rhodium, Canford, Connoisseur, The Cartridge Man, Dais, EB Acoustics, Ferguson, Hadcock, Hacker, Helius, Heybrook, Mayware, John Linsley Hood, Kam, Keith Monks, LAD, Lorricraft, Lynwod, Manticore, Maplenoll, Marlux, Morduant Short, Pink Triangle, Pure, Pye, QED, Q Acoustics, RATA, Revolver, Sugden, Spendor, Sonneteer, Surrey Electronics, Tag Mclaren, TDL, The Funk Firm, Townshend, Trichord, Voyd, Cecil Watts, CJ Walker, Zerostat,
Zeta
Scotland
Linn, Dunlop, STE, Ariston, Audio Origami, FONS, Odyssey Engineering, Source
Ireland
Strathearn Audio,
Holland
Philips, Acoustical, [size=10pt]Van den Hul[/size], Pluto, Tonar
Denmark
Bang & Olufsen, Dynaudio, Densen, B&K, Ortofon, Moerch, ESL, AudioNord
Switzerland
Nagra, Revox, Studer, Goldmund, Thorens, Lenco, Lucashek, Benz Micro, Da Vinci, Ensemble,
Austria,
AKG, Eumig, Pro-Ject, Bosendorfer
Germany,
Beyer, Braun, Sennheiser, Neumann, BASF, AGFA, Dual, Elac, Schneider, Blaupunkt, Becker, Uher, M-Audio, EMT, Transrotor, Acoustic Solid, Clearaudio, MBL, Accustic Arts, Acoustic Signature, ADAM, Amazon, Brinkmann, Duevel, Koss, EAT, Grundig, Aaron, Datakustik, Dreher und Kauf, Glanz, Entec, Lehmann, Nordmende, Omnitronic, Perpetuum-Ebner, Pfeifer, Reloop, SABA, Schroder, Siemens, Telefunken
Slovenia -
Kuzma
Norway,
Tandberg, Electrocompaniet, Hegel
Finland,
Genelec, Amphion
Sweden,
DLS, Oppo, Sentec, Sonab, Unamco
France,
Focal Labs, Audiomeca, Pierre Lurne, Barthe, Cabasse, ERA, Micromega, JC Verdier, Le Tallec, Pierre Clement, Advance Acoustic, Cineco, Solid Sound Systems, Yves Cochet,
Italy,
Bluenote, Chario, Panta
Spain,
DAS, Ecler
Latvia,
RRR
Russia,
Sovtek,
India
Cadence,
China,
Opera / Consonance, Raysonic, Shanling, AudioGD, Xindak
Japan
Dynavector, Stax, Nagaoka, Audio Technica, Ikeda, Supex, Fidelity Research, Luxman, Accuphase, Onkyo, Lyra, Kiseki, Rotel, Technics, Koetsu, Sony, Hitachi, Sanyo, Denon, Yamaha, Tascam, Fostex, Nakamichi, Aiwa, Akai, Pioneer, Panasonic, Aurex, Alpine, Optonica, Ultimo, Koshin, Teac, Toshiba, Sumiko, Digital Do main, JVC, Maxell, TDK, Thats, 47 Labs, Shelter, ZYX, Esoteric, CEC, Reimyo, AudioCraft, Kashimura, Yamamoto, Jelco, Mitsubishi, Acos, Astatic, Coral, Excel, Gemini, Japan Piezo, Jeweltone, Jico, Grace, Kenwood, Kyocera, Micro Seiki, Neat, Nikko, RS Labs, SAEC, Sansui, Satin, Scan Tech, Sharp, Signet, Syntec, Toho, Trio, Vestax,
Korea
Stello
Australia,
Garrott Bros., Commonwealth, JH Reproducers, Orpheus,
Canada
Bryston, EON, Oracle, Platter Matter, Sonic Frontier, Paradigm, PSB, Mirage, Energy, Axiom, Athena
USA
Crown, Ampex, Audio Research, Vac, DBX, ADC, Stanton, Krell, Harman Kardon, Dolby Labs, Marantz, Martin Logan, Fisher, JBL, Bose, Boston Acoustics, Klipsch, McIntosh, Conrad-Johnson, Atma-Sphere, Magnepan, Pass Labs, Vandersteen, Grado, Eminent Technology, KLH, Manley Labs, Westone, Shure, Ultimate Ears, Kloss, H.H. Scott, Dynaco, Stromberg-Carlson, Usher, NuForce, Acoustic Research, Acutex, American Audio, Audax, Audioquest, Alesis, Altec Lansing, Rek-O-Kut, Brush, Bellari,Channel Islands, Coloney, Concept, Denneson, Dexter, Dynamic Sound, Empire, Fairchild, Focusrite, Gates, G.E, Gentner, Graham, Gray Research, Herron, Hunt EDA, Immedia, Infinity, Jeff Roland, Lexicon, Linkwitz Lab, Magnavox, Mark Levinson, Meitner, Micro-Acoustics, Micro-Trak, Mitchell A Cotter, Modular Component Systems, Monolithic Sound, Music Hall, Netronics, Nitty Gritty, Numark, Pickering, Rabco, Rane, RCA, Realistic, Robins, RTS Systems, Russco, Sherwood, Sonographe, Sonus, Souther, Teres, THX, VPI, Wavelength Audio, Well Tempered, Wheaton,