Audio Classics, Ltd.
📍 Vestal, NY (3501 Vestal Rd)
🏅 Cert: Authorized McIntosh Factory Service & Sales Facility 🏅 Cert: Audio Engineering Society (AES) Member Technicians Vintage McIntosh vacuum tube & solid-state amplifier restoration Precision RF tuner alignment & MPX decoder calibration Complete chassis recapping, transformer rewiring, and component testing Audio Precision System Two audio analyzer McIntosh MI-3 maximum performance indicators Hickok mutual conductance tube testers and regulated variable AC variac isolation stations
Verified Source: Official Company Website & Factory Authorization Registry
Approved Audio Service, Inc.
📍 Litchfield, CT (49 Common Rd)
🏅 Cert: Certified Electronics Technician (CET) on staff 🏅 Cert: Better Business Bureau Accredited Business Vintage stereo receiver and power amplifier total recapping Marantz, McIntosh, Luxman, and Fisher vacuum tube gear restoration FM multiplex alignment, phono preamplifier equalization, and bias calibration Sound Technology 1700B distortion measurement system Sencore SG-165 AM/FM stereo analyzer Triplett / B&K dynamic mutual conductance tube testing stations
Verified Source: Connecticut Secretary of State Business Registry & BBB Profile
Just Audio
📍 Parkville, MD (7907 Harford Rd)
🏅 Cert: Consumer Electronics Association (CEA) Specialist 🏅 Cert: Better Business Bureau Accredited Business (A+ Rating) Vintage hi-fi receiver and integrated tube amplifier restoration Vacuum tube curve analysis and power supply capacitor upgrades Analog turntable tone arm calibration, cartridge mounting, and motor service Amplitrex AT1000 computerized vacuum tube testing system Dual-trace laboratory oscilloscopes and audio signal sweep generators Digital capacitance ESR bench meters and Hakko desoldering stations
Verified Source: Maryland Department of Assessments & Taxation and Official Service Portal
Austin Stereo Service
📍 Austin, TX (5448 Burnet Rd)
🏅 Cert: Texas Comptroller Registered Commercial Entity 🏅 Cert: Austin Vintage Audio Guild Specialist Member Classic 1960s-1970s Japanese and American vintage hi-fi service Discrete circuit troubleshooting and vacuum tube amplifier restoration Electrolytic capacitor replacement and DC offset/bias calibration Tektronix 2200 series oscilloscopes Leader LDC frequency counter and low-distortion audio generators Heathkit IT-12 signal tracer and regulated DC bench power supplies
Verified Source: Texas Secretary of State Commercial Registry & Official Business Website
Music Technology, Inc.
📍 Springfield, VA (5418 Port Royal Rd)
🏅 Cert: Factory-Authorized Service Facility for Conrad-Johnson and McIntosh 🏅 Cert: Audio Engineering Society (AES) Corporate Member Audiophile-grade vacuum tube preamplifier and power amplifier overhaul Factory-authorized Conrad-Johnson and McIntosh heritage component repair Custom audiophile film/foil capacitor upgrades and low-noise circuit modifications Audio Precision System One dual-domain audio test system Keithley precision low-current bench multimeters Hewlett Packard 339A distortion measurement set
Verified Source: Virginia State Corporation Commission Entity Database & Official Website
George Meyer AV
📍 Los Angeles, CA (4844 W Jefferson Blvd)
🏅 Cert: California Bureau of Household Goods and Services (BHGS) Licensed Electronic Repair Dealer 🏅 Cert: Authorized McIntosh, Mark Levinson, and Audio Research Service Center Factory-authorized vintage and modern high-end tube audio restoration Exotic vacuum tube amplifier biasing, load testing, and harmonic analysis Solid-state and tube receiver RF front-end alignment Audio Precision APx555 audio analyzer Leader distortion analyzer and synthesized RF signal generator Weller ESD-safe temperature-controlled soldering and desoldering systems
Verified Source: California Department of Consumer Affairs License Verification & Official Portal
Deltronics Analog Repair
📍 Chicago, IL (5600 W Diversey Ave)
🏅 Cert: National Association of Service Managers (NASM) Affiliate 🏅 Cert: Illinois Department of Revenue Registered Commercial Service Facility Vintage tube and solid-state stereo receiver component repairs Open-reel tape deck and cassette transport overhaul and azimuth calibration Point-to-point wiring rebuilds and precision potentiometer cleaning/replacement HP 8903B audio analyzer B&K Precision 747B mutual conductance tube tester Tentelometer tape tension gauge and calibrated alignment test tapes
Verified Source: Illinois Secretary of State Corporate Records & Official Website
Echo Audio
📍 Portland, OR (1015 SW Washington St)
🏅 Cert: Oregon Secretary of State Corporation Registry (Entity #262947-92) 🏅 Cert: Better Business Bureau Accredited Business High-end vacuum tube monoblock and integrated amplifier restoration Precision turntable setup, tonearm geometry calibration, and cartridge loading Vintage stereo preamplifier overhaul and capacitor recapping Fluke 8846A 6.5 digit precision bench multimeter Rigol digital storage oscilloscope and function generator Acoustically isolated dedicated listening evaluation suite
Verified Source: Oregon Secretary of State Business Registry & Official Business Website
Audio Specialties Ltd.
📍 Portland, OR (10220 NE Halsey St)
🏅 Cert: Oregon Secretary of State Active Commercial Entity 🏅 Cert: Pacific Northwest Vintage Audio Technicians Group Member Golden era vintage audio receiver refurbishment (Pioneer, Marantz, Sansui, Kenwood) Discrete transistor matching and vacuum tube power stage restoration Acoustic speaker driver refoaming and passive crossover network rebuilding Sencore PR57 Powerite variable isolated AC safety supply B&K Precision audio sweep generator and frequency counter Hickok 539C dynamic mutual conductance laboratory tube tester
Verified Source: Oregon Secretary of State Corporate Division & Official Company Portal
The Soundsmith
📍 Peekskill, NY (8 John Walsh Blvd, Ste 417)
🏅 Cert: Audio Engineering Society (AES) Senior Member Technicians 🏅 Cert: Former Bozak Director of Engineering Led Technical Team Artisan handcrafted vacuum tube amplifier and preamplifier restoration Phono cartridge rebuilding, cantilever retipping, and micro-suspension tuning Custom audio transformer matching and high-end discrete circuit rebuilding High-magnification stereomicroscope micro-manipulation assembly bench Custom high-voltage vacuum tube curve tracers Proprietary dynamic cartridge compliance and distortion test benches
Verified Source: New York Department of State Division of Corporations & Official Website
Deja Vu Audio
📍 Vienna, VA (8450B Tyco Rd)
🏅 Cert: Virginia State Corporation Commission Registered Entity 🏅 Cert: Audio Engineering Society (AES) Professional Member Vintage Western Electric vacuum tube amplifier restoration Single-ended triode (SET) point-to-point wired amplifier rebuilding Vintage horn loudspeaker crossover re-engineering and driver coil alignment Custom Western Electric vacuum tube testing panels Staco Variac isolation transformers and regulated high-voltage bench supplies Tektronix laboratory dual-channel oscilloscopes
Verified Source: Virginia State Corporation Commission Entity Search & Official Website
Stereo Lab Service, Inc.
📍 Columbus, OH (4538 Indianola Ave)
🏅 Cert: Better Business Bureau Accredited Business (A+ Rating) 🏅 Cert: Ohio Secretary of State Registered Corporation (Charter #656461) Antique and vintage vacuum tube radio, preamplifier, and amplifier repair Classic Marantz, McIntosh, and Fisher receiver overhaul and recap service Open-reel tape recorder calibration and classic audio console restoration B&K mutual conductance tube testing consoles Hewlett Packard 334A distortion analyzer Sencore variable AC isolation power supply and audio signal tracer probes
Verified Source: Ohio Secretary of State Business Registry & BBB Central Ohio Profile
Brooks Berdan Ltd.
📍 Monrovia, CA (110 W Olive Ave)
🏅 Cert: Factory-Authorized Service Facility for VTL, Audio Research, and Jadis 🏅 Cert: California Bureau of Household Goods and Services (BHGS) Licensed Facility Reference vacuum tube power amplifier and preamplifier service and rebuilding Precision analog turntable tonearm setup, Azimuth/VTA/SRA calibration Tube bias matching, noise floor reduction, and signal path component upgrades Audio Precision testing suite WallyTools high-precision analog tonearm alignment optics Tektronix 4-channel digital oscilloscope with high-voltage differential probes
Verified Source: California Department of Consumer Affairs & Official Business Website
AudioProz
📍 Watertown, MA (779 Mt Auburn St)
🏅 Cert: Society of Broadcast Engineers (SBE) Affiliated Technicians 🏅 Cert: Commonwealth of Massachusetts Registered Business Entity Vintage vacuum tube and solid-state amplifier rebuilding and circuit optimization Component-level engineering modifications to lower noise floor and thermal drift Professional reel-to-reel tape transport and turntable mechanical restoration Sound Technology 1700A low-distortion audio generator and analyzer Leader LBO-518 oscilloscope and digital signal generators Custom component thermal stress test chamber
Verified Source: Massachusetts Secretary of the Commonwealth Corporate Registry & Official Site
British Audio Service, Inc.
📍 Nashville, TN (5343 Charlotte Ave)
🏅 Cert: Tennessee Secretary of State Corporate Registration (Filing #000667352) 🏅 Cert: Better Business Bureau Accredited Business (A+ Rating) Vintage valve/tube audio amplifier restoration and transformer rewiring High-voltage tube power rail stabilization and electrolytic recapping Vintage audio monitoring equipment and tube analog circuit maintenance Orange DIVO VT1000 automated vacuum tube analyzer Tenma variable isolated DC/AC power supplies and variacs Fluke true-RMS bench multimeters with current clamping probes
Verified Source: Tennessee Department of State Corporate Database & BBB Middle Tennessee
Adams Electronics
📍 Tampa, FL (13966 W Hillsborough Ave)
🏅 Cert: Florida Department of State Division of Corporations Registered Entity 🏅 Cert: National Electronics Service Dealers Association (NESDA) Member Vintage vacuum tube audio amplifier diagnostics, rebuilding, and recapping Classic Marantz, Sansui, McIntosh, and Pioneer receiver restoration Analog reel-to-reel and cassette tape recorder mechanical alignment Sencore SG-165 AM/FM stereo analyzer and RF generator B&K Dynascan 707 mutual conductance tube tester Leader LDC-824 frequency counter and distortion analyzer
Verified Source: Florida Division of Corporations (Sunbiz) & Official Business Website
Arizona Hi-Fi
📍 Phoenix, AZ (10 W Camelback Rd, Front)
🏅 Cert: Arizona Corporation Commission Entity (#L13098522) 🏅 Cert: Custom Electronic Design & Installation Association (CEDIA) Member Specialized vacuum tube hi-fi amplifier service, tube roll testing, and biasing Analog turntable tonearm alignment and phonograph cartridge impedance tuning Single-ended triode and push-pull tube circuit restoration Amplitrex AT1000 microprocessor-controlled vacuum tube tester Dr. Feickert Protractor analog cartridge alignment geometry suite Bench isolation transformers and true-RMS audio voltmeters
Verified Source: Arizona Corporation Commission Public Database & Official Website
Decware / High Fidelity Engineering Co.
📍 East Peoria, IL (75 S Riverview Dr)
🏅 Cert: Illinois Secretary of State Registered Corporation 🏅 Cert: Audio Engineering Society (AES) Member Engineers Artisan hand-wired point-to-point vacuum tube audio restoration and rebuilding Single-ended triode (SET) amplifier restoration and output transformer impedance matching Audiophile-grade beeswax paper-in-oil capacitor upgrading and power supply rebuilding Tektronix high-voltage laboratory oscilloscopes Custom high-wattage non-inductive dummy load banks with thermal monitoring General Radio precision audio signal generators and distortion meters
Verified Source: Illinois Secretary of State Business Services & Official Engineering Facility
Holt Hill Audio, LLC
📍 Andover, MA (19 Dale St)
🏅 Cert: Massachusetts Secretary of the Commonwealth Corporate Entity 🏅 Cert: Audio Engineering Society (AES) Member Technicians Vintage stereo receiver restoration, tuner alignment, and control servicing Vintage tube and solid-state amplifier recap and circuit board refurbishment Vintage acoustic speaker crossover network rebuilding and cabinet veneer restoration AvidCNC precision acoustic tooling router and woodwork shop B&K Precision audio sweep frequency generator and oscilloscope Digital high-accuracy LCR component bridge analyzer
Verified Source: Commonwealth of Massachusetts Corporations Division & Official Business Portal
Aural HiFi
📍 Denver, CO (1438 S Broadway)
🏅 Cert: Colorado Secretary of State Business Entity (ID #20181907727) 🏅 Cert: Denver Audio Society Recognized Restoration Center Comprehensive vintage hi-fi amplifier recapping and circuit overhaul Discrete transistor gain matching and low-noise resistor network installation Analog turntable precision rebuilding, belt/motor calibration, and plinth restoration Rigol 100MHz 4-channel digital oscilloscope with signal generator Der EE DE-5000 handheld precision LCR component meter Variac AC variable transformer with digital current and voltage bench monitors
Verified Source: Colorado Secretary of State Business Database & Official Website
Consumer Electronic Service
📍 Cary, NC (517 E Chatham St)
🏅 Cert: North Carolina Secretary of State Registered Corporation 🏅 Cert: International Society of Certified Electronics Technicians (ISCET) Member Staff Vintage 1960s-1980s analog receiver and vacuum tube amplifier restoration Component-level discrete circuitry troubleshooting and power supply recapping Turntable mechanical restoration, drive belt replacement, and speed pitch alignment Tektronix dual-trace storage oscilloscopes B&K Precision audio frequency generators and frequency counters Dedicated vintage donor parts inventory and Hakko temperature-regulated desoldering stations
Verified Source: North Carolina Secretary of State Corporations Division & Official Website
Modular Electronics, Inc.
📍 Roswell, GA (11205 Alpharetta Hwy, Ste B3)
🏅 Cert: Georgia Secretary of State Corporations Division Active Entity 🏅 Cert: Better Business Bureau Accredited Business High-end and vintage vacuum tube and solid-state audio component repair Preamplifier and amplifier power rail rebuilding and component matching Reel-to-reel tape machine and high-end turntable transport servicing Hewlett Packard / Agilent precision audio oscillators Leader audio distortion meters and wow & flutter measurement meters Anti-static ESD diagnostic workstations with regulated DC power benches
Verified Source: Georgia Secretary of State Business Registry & Official Business Website