Here is a structured and reliable list of major manufacturers of Distortion Meters (Audio Distortion Analyzers / THD meters) with their addresses, phone numbers, email, and website details. These companies are globally recognized in audio testing and electronic measurement instruments.
🌍 Major Distortion Meter Manufacturers (Global Directory)
1. Audio Precision
Overview
World leader in audio analyzers and distortion measurement systems (THD, THD+N, IMD)
Contact Details
Headquarters: 5750 SW Arctic Drive, Beaverton, Oregon 97005, USA
Phone: +1 503 627 0832
Email: sales@ap.com
Website: https://www.ap.com
Products
Audio Distortion Analyzers
THD+N Measurement Systems
High-precision audio test solutions
2. Keysight Technologies
Overview
Provides advanced distortion measurement through signal analyzers and audio test systems
Contact Details
Headquarters: 1400 Fountaingrove Parkway, Santa Rosa, CA 95403, USA
Phone: +1 800 829 4444
India Phone: +91 80 6215 9000
Email: Via website contact
Website: https://www.keysight.com
Products
Digital distortion analyzers
Signal analyzers with THD measurement
3. Rohde & Schwarz
Overview
Manufacturer of high-end RF and audio analyzers with distortion measurement capability
Contact Details
Address: Mühldorfstraße 15, 81671 Munich, Germany
Phone: +49 89 4129 0
Email: info@rohde-schwarz.com
Website: https://www.rohde-schwarz.com
Products
Audio analyzers
RF distortion measurement systems
4. Yokogawa Electric Corporation
Overview
Produces power analyzers and instruments capable of harmonic distortion measurement
Contact Details
Address: 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, Japan
Phone: +81 422 52 5555
Email: Via website
Website: https://www.yokogawa.com
Products
Power analyzers with THD measurement
Harmonic distortion measurement systems
5. GW Instek
Overview
Manufacturer of analog and digital distortion meters and audio analyzers
Contact Details
Address: No. 7-1, Jhongsing Road, Tucheng District, New Taipei City, Taiwan
Phone: +886 2 2268 0389
Email: marketing@gwinstek.com
Website: https://www.gwinstek.com
Products
THD meters
Audio analyzers
6. Leader Electronics Corporation
Overview
Specializes in audio and video test equipment including distortion meters
Contact Details
Address: 3-12-6 Higashi-Nakano, Nakano-ku, Tokyo 164-0003, Japan
Phone: +81 3 3369 0111
Email: info@leader.co.jp
Website: https://www.leader.co.jp
Products
Audio distortion meters
Audio analyzers
7. Megger Group Limited
Overview
Produces power quality analyzers with harmonic distortion measurement
Contact Details
Address: Archcliffe Road, Dover CT17 9EN, United Kingdom
Phone: +44 1304 502101
Email: uk@megger.com
Website: https://www.megger.com
Products
Power analyzers
Harmonic distortion measurement instruments
8. Extech Instruments
Overview
Supplier of portable electrical and distortion measurement instruments
Contact Details
Address: 9 Townsend West, Nashua, NH 03063, USA
Phone: +1 603 324 7800
Email: support@extech.com
Website: https://www.extech.com
Products
Power analyzers
Harmonic distortion testers
9. Fluke Corporation
Overview
Manufacturer of power quality analyzers with distortion measurement capability
Contact Details
Address: 6920 Seaway Blvd, Everett, WA 98203, USA
Phone: +1 425 446 5500
Email: Via website contact
Website: https://www.fluke.com
Products
Power quality analyzers
THD measurement tools
10. National Instruments
Overview
Provides software-based distortion measurement systems using DSP
Contact Details
Address: 11500 N Mopac Expressway, Austin, Texas 78759, USA
Phone: +1 512 683 0100
Email: Via website
Website: https://www.ni.com
Products
Modular distortion analyzers
Software-defined measurement systems
📊 Classification by Distortion Meter Type
Audio Distortion Analyzer Manufacturers
Audio Precision
Leader Electronics
GW Instek
RF / Communication Distortion Measurement
Rohde & Schwarz
Keysight Technologies
Power & Harmonic Distortion Measurement
Yokogawa
Fluke
Megger
Extech
Software / Modular Systems
National Instruments
📌 Key Industry Insights
High-precision distortion measurement is dominated by audio analyzer specialists like Audio Precision
RF distortion testing is led by Keysight and Rohde & Schwarz
Power harmonic distortion measurement is widely handled by Fluke and Yokogawa
Modern systems use FFT and DSP-based analysis instead of analog notch filters
✅ Conclusion
The distortion meter industry includes a mix of audio specialists, RF test companies, and power analysis manufacturers:
High-end audio testing: Audio Precision, Leader
RF & telecom: Keysight, Rohde & Schwarz
Power systems: Fluke, Yokogawa, Megger
General-purpose / education: GW Instek, Extech
These manufacturers provide solutions for THD, THD+N, IMD, and harmonic distortion measurement, supporting industries like audio engineering, telecommunications, power systems, and research laboratories.
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