Name

Ole Wolff

Legal name

Ole Wolff Elektronik A/S

Website

https://owolff.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

1,001–5,000 employees

Ownership category

akta.pro rank

Product category

Electroacoustic and Magnetic Components

NAICS

Electrical Equipment Manufacturing (33531), Other Electrical Equipment and Component Manufacturing (3359), Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment, Appliance, and Component Manufacturing (335)

SIC

Electronic Coils, Transformers & Other Inductors (3677), Electronic Components & Accessories (3670), Electrical Industrial Apparatus (3620)

akta.pro primary industry

Inductors & Coils (Power/RF/Chokes) (HDAHANAC)

akta.pro secondary industries

Transformers & Magnetics (Power/Signal) (HDAHANAD), EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials) (IMAGAJAN), Passive Components (Resistors, Capacitors, Inductors, Ferrites) (IMAGAJAA), Audible-Visual Alarms & Notification Devices (Sounders, horns, siren/strobe combos for industrial use) (IMAGAIAF)

Keywords

• Acoustic components
• Magnetic components
• Electroacoustic manufacturing
• Power inductors
• Headphone drivers

Headquarters

HQ city

Sorø

HQ country

Denmark

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Acoustic Components Sales: Design and manufacture of speakers, drivers, buzzers, and microphones. Products range from 5mm to +50mm. Fully automated production lines ensure uniform quality and cost competitiveness.
2. Magnetic Components Sales: Power inductors, common mode chokes, high-frequency transformers, and related magnetic components for consumer electronics, medical devices, and industrial applications.
3. Custom Design Services: Application support and custom design services working closely with customers from concept to finished product. Engineers in Denmark and China provide design support.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Ole Wolff designs and manufactures electroacoustic and magnetic components including speakers, head- and earphone drivers, buzzers, telecom receivers, microphones, power inductors, common mode chokes, and high-frequency transformers. The company supports these products with custom design services, application engineering, and COMSOL Multiphysics-based virtual prototyping delivered through R&D centers in Denmark and China. Products are produced on fully automated production lines in Asia and sold globally to OEMs in consumer electronics, medical devices, and industrial systems.

Product overview

Ole Wolff designs and manufactures acoustic and magnetic components across two main product categories. Acoustic products include speakers (microspeakers, general purpose, Bluetooth, fire alarm), head- and earphone drivers (standard, ANC-optimized, pistonic series, REI sustainable drivers), buzzers (magnetic, piezo, alarm), telecom receivers (wideband, super wideband, HAC compliant), and microphones (ECM and MEMS analog/digital). Magnetic products include SMD power inductors (shielded, semi-shielded, non-shielded, carbonyl/metal molded, dual coil), high-current inductors (ferrite, DC-DC, air core, metal molded), common mode chokes (molded, shielded chip, toroid, dual mode), high-frequency transformers (AC/DC, DC/DC, push-pull), THT inductors (storage, filter, air, wireless charging), current transformers (sensor, split-core), and network/RF components (RF inductors, LAN transformers, baluns, RJ45 connectors). The company also provides application support services including COMSOL simulation, virtual prototyping, and design consultation. Products are available through Digi-Key marketplace and distribution.

Differentiator

Problem solved

Functional benefit

Brands

• Reduced Environmental Impact (REI) drivers: A new range of headphone drivers developed by Ole Wolff with the goal of reducing environmental impact through sustainable initiatives including the use of recycled raw materials, without compromising acoustic performance.

Products and services

• Speakers Full range of acoustic speakers covering microspeakers, general purpose speakers, Bluetooth high power speakers, and fire alarm speakers compliant with UL217 and UL1480 standards. For consumer electronics, IoT, and fire safety OEMs.
• Head- and Earphone Drivers Drivers for headphones and earbuds, including high-end drivers, ANC-optimized drivers, pistonic series drivers with biocellulose diaphragms, and Reduced Environmental Impact (REI) drivers using recycled materials. For headphone and TWS earphone OEMs.
• Buzzers SMD magnetic buzzers, SMD piezo buzzers, alarm buzzers, and piezo discs for medical devices and general alarm applications, including ISO13485-certified models.
• Telecom Receivers Receivers for telecom handsets, including wideband (TIA920A) and super wideband (P1120) compliant models with HAC compatibility and built-in leakage for consistent bass response. For telecom handset OEMs.
• Microphones (ECM and MEMS) Electret condenser microphones (6mm to 10mm) and MEMS microphones in analog and digital versions, with 70dB SNR and high acoustic overload point above 130dB SPL. For conference systems, cameras, and audio recorders.
• SMD Power Inductors Shielded, semi-shielded, and non-shielded SMD power inductors, including carbonyl and metal molded inductors, flat wire iron-powder molded inductors, and dual coil inductors for power management applications.
• High-Current Inductors High-current inductors including ferrite super high-current dual inductors, high-current DC-DC inductors, air core shielded inductors, metal-molded high-current dual inductors, metal super high-current dual inductors, and flat wire wind composite inductors.
• Common Mode Chokes Common mode chokes including molded filters, shielded chip CMC coils, single and two-line CMCs, toroid power CMCs, dual mode chokes, ferrite and nanocrystalline core types, and SQ and UU/ET type CMCs for EMI management.
• High-Frequency Transformers AC/DC transformers (85-265V), DC/DC transformers, push-pull transformers, and flyback transformers for power conversion applications.
• THT Inductors Through-hole technology (THT) inductors including storage and filter coils, air coils, and wireless charging coils.
• Current Transformers Current sensor transformers and split-core current transformers for current measurement applications.
• Network and RF/HF Components RF inductors, LAN transformers, balun transformers, and RJ45 connectors for networking and high-frequency applications.
• Waterproof Microspeaker OWS-061230L-8A Ultra-small micro speaker (6x12x3.0mm) waterproof to 50m water pressure, with 66±3dB sensitivity at 1W/1m and 8Ω impedance, optimized for 1cc cavities in watches and wearables.
• High-End Driver OWR-0745T-32 7mm dynamic driver for high-end earphones with 112±3dB sensitivity, 32Ω impedance, 5/10W power handling, featuring Deep Drawn Diaphragm technology and excellent leak tolerance and bass performance.
• Pistonic Headphone Driver OWR-5009T-38A 50mm pistonic headphone driver with ultra low distortion, 101±3dB sensitivity at 1kHz, 38Ω impedance, biocellulose diaphragm with Ole Wolff special coating for high fidelity and ANC applications.
• Reduced Environmental Impact (REI) Drivers Headphone drivers developed with sustainable initiatives including recycled raw materials, designed to reduce environmental impact without compromising acoustic performance or increasing cost.
• Application Support Services R&D and application support offering acoustic design services including COMSOL Multiphysics simulation, virtual prototyping, speaker system design, ANC optimization, and transducer design support delivered from centers in Denmark and China.

Quantifiable outcome

• Over 40 years of proven industry track record
• +1 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability4 records

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Knowles CorporationcoreStrategic or Co-development Partner · 21 December 2021Knowles partnered with Ole Wolff to deliver a compact hybrid driver for TWS earphones combining Knowles' high-performance balanced armature RAN model tweeter with Ole Wolff's 8mm dynamic woofer. The collaboration enables unprecedented performance for small-size TWS earphones with HD Audio and ANC capabilities, with the Ole Wolff woofer delivering rich bass and excellent ANC performance while Knowles delivers exceptional treble performance up to 40 kHz for JAS Hi-Res Audio certification.
• Digi-KeycoreChannel Partner/ Reseller/ DistributorOle Wolff products are available on Digi-Key Marketplace, making acoustic products more accessible for customers to find, buy and evaluate. Products include headphone and ear bud drivers, IoT microspeakers, Bluetooth speakers, telecom receivers, buzzers, and alarm speakers.
• BürklinminorChannel Partner/ Reseller/ DistributorSamples of Ole Wolff products available through Bürklin distributor for European customers.
• COMSOLcoreTechnology or IntegrationOle Wolff has been using COMSOL Multiphysics since 2016 for simulating mechanical, electrical and acoustic parameters. The company collaborated with COMSOL on modeling the 19mm speaker OWS-1943T-8CP which is featured as a model in COMSOL Multiphysics software. COMSOL simulations enable confident decisions based on simulation results and optimization of acoustic products.
• KlippelcoreTechnology or IntegrationOle Wolff uses Klippel measurement systems including laser diaphragm scanning hardware (SCN) for speaker parameter detection and verification. The company has both COMSOL for simulation and Klippel for verification, creating a powerful combination for transducer design.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• BSE Co., Ltd. Korea-based manufacturer of dynamic speakers, receivers, and buzzers for mobile phones, headphones, and IoT. Closely comparable product portfolio and customer base to Ole Wolff's acoustic components division.
• Sonion: Privately held (PE-owned) Danish manufacturer of micro-acoustic components for hearing aids, TWS, and medical devices — closely comparable in size, geography, customer base, and product overlap to Ole Wolff's acoustic business.
• Foster Electric: Japan-listed global manufacturer of speakers, microphones, and acoustic components for consumer electronics and automotive. Comparable in scale and product range to Ole Wolff's acoustic line, serving many of the same tier-one OEM customers.
• Knowles Corporation: NYSE-listed manufacturer of balanced armature drivers, MEMS microphones, and audio components for hearing aids, TWS, and smartphones. Both a direct competitor (in drivers and microphones) and an active co-development partner with Ole Wolff for hybrid TWS solutions.
• Sonavox Electronics: China-based manufacturer of speakers, drivers, and buzzers for consumer electronics and automotive applications. Similar product scope to Ole Wolff's general-purpose speakers and buzzer lines, with comparable tier-one OEM exposure.
• Soberton, Inc. US-based manufacturer of speakers, buzzers, and microphones for industrial, medical, and consumer applications. Comparable product profile and customer-segment mix to Ole Wolff's general-purpose acoustic line, with a similar mid-market positioning.

Broad incumbents

• GoerTek: Shenzhen-listed ODM/EMS with vertically integrated acoustic component manufacturing for TWS, AR/VR, and smart speakers. Significantly larger than Ole Wolff and competing across the same consumer-electronics acoustic value chain.
• AAC Technologies: Hong Kong-listed, China-headquartered leader in miniaturized acoustic, haptic, and optical components for smartphones and wearables. A much larger competitor serving the same flagship consumer-electronics OEMs as Ole Wolff.
• TDK Corporation (Acoustic & Magnetics): Japan-listed global electronics giant with substantial product overlap in inductors, common mode chokes, transformers, and acoustic components. A much larger competitor in Ole Wolff's magnetics portfolio in particular.

Emerging players

• xMEMS Labs: Silicon Valley startup pioneering solid-state MEMS speakers for TWS and hearing aids. Represents the disruptive technology frontier that could either become a partner/supplier to Ole Wolff's acoustic customers or a long-term substitute threat to dynamic drivers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@olewolffelectronics3119
• LinkedInlinkedin.com/company/69900932

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ole Wolff