What JK Audio does

JK Audio, Inc. is a privately held US manufacturer of professional audio interface equipment for the broadcast industry, founded in 1992 by former AT&T Bell Labs audio engineer Joe Klinger. The company designs and builds hardware products in the USA at its Sandwich, Illinois manufacturing facility, with corporate operations based in Nashville, Tennessee. Its portfolio spans more than 40 specialized SKUs organized around digital telephone hybrids, handset interfaces, Bluetooth wireless audio interfaces, field mixers with integrated phone hybrids, listen-only IFB amplifiers, and intercom-to-phone bridges.

The technical core is a proprietary dual-convergence echo-canceller DSP algorithm achieving greater than 50 dB transhybrid loss without manual nulling or noise bursts — a capability derived from Klinger's Bell Labs speech-coding work. This DSP foundation underpins multiple product families, including the innkeeper series of desktop and rack-mount digital hybrids, the AutoHybrid IP2 VoIP/AoIP codec hybrid supporting G.711/G.722/G.729/Opus, HD Voice wide-band speech (50 Hz–7 kHz) across Bluetooth-enabled products, and the Concierge 2x6 talk-show switch system with Guest Module control surfaces and RIU-IP web remote control.

JK Audio generates revenue almost exclusively through one-time hardware sales distributed via a global authorized-dealer network of more than 50 resellers — including B&H Photo, Sweetwater, Trew Audio, Broadcasters General Store, and Gotham Sound in the US, plus international dealers across Canada, Europe, Asia Pacific, the Middle East, Africa, and Latin America. Retail pricing ranges from approximately $59 for basic handset taps to $545 for multi-interface devices like ComPack, with no subscription, SaaS, or recurring-revenue component disclosed. The company serves three primary segments: radio and television broadcasters (primary), journalists and field reporters using mobile and Bluetooth interfaces, and live-event production companies requiring intercom and IFB solutions. The firm is bootstrapped with no institutional funding, no parent company, and no disclosed subsidiaries.

Name

JK Audio

Legal name

JK Audio, Inc.

Website

https://jkaudio.com

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

11–50 employees

Short description

JK Audio designs and manufactures professional digital-hybrid, Bluetooth, and field-mixer audio interfaces that connect telephone, VoIP, and intercom systems to broadcast equipment, serving radio/TV stations, journalists, and live-event production companies worldwide via a global authorized-dealer network.

Ownership category

akta.pro rank

Product category

Professional Broadcast Audio Equipment

NAICS

Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing (334220), Audio and Video Equipment Manufacturing (33431), Telephone Apparatus Manufacturing (33421)

SIC

Radio & Tv Broadcasting & Communications Equipment (3663), Communications Equipment, Nec (3669)

akta.pro primary industry

Pro Audio Equipment (Mics, Interfaces, Mixers, Studio Monitors) (MPAIAJAB)

akta.pro secondary industry

Live Sound & Stage Equipment (PA Systems, Amplification, Monitoring) (MPAIAJAD)

Keywords

• Broadcast audio interfaces
• Telephone digital hybrids
• Bluetooth wireless audio
• VoIP AoIP codecs
• Professional field mixers

Headquarters

HQ city

Sandwich

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Product Sales: JK Audio generates revenue through the sale of physical audio interface hardware products including digital hybrids, telephone interfaces, Bluetooth audio interfaces, field mixers, and intercom equipment. Products are sold through authorized dealer network worldwide.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

JK Audio designs, manufactures, and sells professional audio interface hardware for the broadcast industry, including digital hybrid telephone interfaces, VoIP/AoIP codecs, Bluetooth wireless audio interfaces, field mixers, intercom bridges, and IFB amplifiers. The products connect telephone lines (POTS, PBX, VoIP, wireless) to professional broadcast audio equipment, enabling clean two-way telephone conversations for radio talk shows, TV interviews, remote reporting, and live event production. All products are built in the USA with proprietary DSP-based echo cancellation technology.

Product overview

JK Audio is a US-based manufacturer of professional audio interface equipment for the broadcast industry, offering a diversified portfolio of specialized hardware products organized around telephone/POTS, VoIP, PBX, Bluetooth wireless, intercom, and field mixer applications. The core product architecture centers on digital hybrid technology — DSP-based telephone line interfaces that separate caller and talent audio with >50 dB transhybrid loss — which serves as the foundation for multiple product families including desktop digital hybrids (Broadcast Host, innkeeper series, Universal Host), auto-answer hybrids (AutoHybrid, innkeeper LTD), handset interfaces (THAT-1, THAT-2, QuickTap, Voice Path), and Bluetooth-enabled wireless audio interfaces (Daptor Two, Daptor Three, BlueDriver, BluePack, BlueSet, BlueKeeper). Supporting these are field mixers with integrated phone interfaces (RemoteMix 2, RemoteMix 3.5, RemoteMix 4, RemoteMix x4), listen-only IFB amplifiers (RemoteAmp, RemoteAmp Two), intercom belt pack bridges (Interchange, Interchange LTD, Outerloop, Outerloop 3.5, Interloop), the Concierge 2x6 talk show switch system, and accessories including the RIU-IP remote control interface and Guest Module remote keypads. A talk show system combines the Concierge switch core with innkeeper digital hybrids and Guest Module control surfaces. Many products are offered with rack-mount adapter options (RA2, RA4 panels). The product line spans over 40 specialized audio interface products, all designed and built in the USA.

Differentiator

Problem solved

Functional benefit

Products and services

• AutoHybrid A passive full-duplex auto-answer/disconnect telephone line hybrid supporting simultaneous send and receive audio through analog (POTS) telephone lines, suitable for monitoring, IFB feeds, and studio/conferencing PA telephone interface applications.
• AutoHybrid IP2 A VoIP/AoIP codec hybrid providing two-line VoIP call control, front-panel call management, G.711/G.722/G.729/Opus voice codecs, 24-bit Audio over IP (AoIP) stereo codec streaming, AGC, caller ducking, and PoE or AC power, designed as a POTS-to-IP transition device for talk shows, IFB, and courtroom/conference room audio.
• Broadcast Host A desktop digital hybrid with 16-bit DSP, auto-answer capability, proprietary auto null algorithm (>50 dB separation), XLR mic/line input, 3.5mm line input, XLR caller output, and Guest Module remote control jack for talk show quality phone recordings into mixers or sound cards.
• innkeeper LTD A digital auto-answer hybrid with enable/disable auto-answer, balanced XLR output for caller audio, 50 dB null separation via DSP, recessed volume controls, and compatibility with Guest Module 1 remote control, designed for IFB, talk shows, interviews, and conference room full-duplex applications.
• innkeeper PBX A desktop digital hybrid that converts multi-line PBX type telephone systems into professional talk show consoles by connecting between the telephone handset and base, featuring a 16-bit DSP echo canceller, stereo output for host/caller separation, and connections for mic, headphones, mixer, and sound card.
• innkeeper 1rx A single-line digital hybrid with 16-bit DSP, 50 dB transhybrid loss, AGC, Caller Ducking, and Presence filter, delivering excellent caller audio output without transmit/receive crosstalk for radio/TV talk shows, teleconferencing, and auto-answer IFB feeds.
• innkeeper 2 A two-line digital hybrid in 1U rack form factor with front panel keypad, LCD display, handset jacks, conferencing, AGC, and memory speed dial, providing excellent caller audio for talk shows, teleconferencing, and multi-line IFB feeds.
• innkeeper 4 A four-line digital hybrid in 1U rack space with front panel keypad and backlit LCD, AGC, conferencing, 50 dB proprietary auto null, send XLR inputs, caller XLR outputs, mix out, headphone jack, and RIU-IP remote IP interface support for multi-line talk shows and teleconferencing.
• Universal Host A desktop digital hybrid for IP/PBX telephone systems with 16-bit USB audio CODEC (up to 48 kHz stereo recording), handset selector switch supporting electret/carbon/dynamic mics, and dual-convergence echo canceller (50 dB separation), converting multi-line telephones into professional interview stations.
• THAT-1 A telephone handset audio tap with RCA input/output and output level control, connecting between telephone and handset to provide audio recording and playback access for radio stations, computer voice services demonstrations, and powered speaker setups, compatible with electret microphone telephones.
• THAT-2 A telephone handset audio tap with both RCA and XLR input/output and input/output level controls, providing quick access to audio in and out of analog, digital PBX, and ISDN telephones, used by radio stations for sound byte recording and by TV/film crews for IFB dialog over phone lines.
• QuickTap A simple passive telephone handset tap providing quick access to audio from any telephone for recording both sides of a conversation onto a portable recorder or computer sound card, compatible with analog, digital, PBX, and ISDN telephones (not cellular or keypad-in-handset phones).
• QuickTap IFB A telephone handset IFB tap with balanced XLR output (600 ohm) and 3.5mm mono audio output with attenuator, providing listen-only access to audio from any telephone system for IFB, ENG, or AV applications.
• Voice Path A passive telephone handset audio tap using 3.5mm mini jacks, continuously routing both sides of a conversation to a PC/Mac sound card mic input, with a switch-selectable button to play audio recordings back into the phone line, compatible with electret, dynamic, and carbon handset types.
• CellTap 4C A wireless phone interview-recording adapter that connects between a headset and cell phone using a 3.5mm 4-conductor TRRS jack, providing transformer-coupled stereo output (local mic left, caller right) to a recorder or mixer, with internal switch supporting two TRRS wiring standards.
• Daptor Two A passive wireless phone audio interface with XLR and 1/4-inch input/output, 3.5mm TRRS headset jack, switch for TRRS configuration selection, and no battery or AC required, enabling send/receive audio from a wireless phone or notebook through a mixer or tape recorder.
• Daptor Three A Bluetooth wireless audio interface with 3-pin female XLR input, 3-pin male XLR output, 3.5mm input/output, HD Voice compatibility (7 kHz wide-band speech), up to 18+ hours on a 9V battery, supporting Master/Headset modes for A2DP audio streaming or two-way hands-free calling.
• BlueDriver-F3 A Bluetooth device-to-XLR audio adapter pairing with Bluetooth phones/headsets/speakers, featuring a 3-pin female XLR input, 3.5mm headphone output for monitoring return audio, HD Voice compatible, and internal Li-Ion rechargeable battery, enabling wireless audio-for-video recording and live remote broadcasts.
• BlueDriver-M3 A Bluetooth device with 3-pin male XLR output, 3.5mm input/output, headset/phone role select switch, and internal Li-Ion rechargeable battery, providing audio routing from a Bluetooth device into a mixer mic input, supporting A2DP streaming or hands-free calling in headset or phone mode.
• BluePack A Bluetooth wireless belt pack for live man-on-the-street interviews through phones/tablets, featuring XLR mic input, 3.5mm stereo line input/output, 1/4-inch headphone jack, 1/2-watt amplifier, HD Voice compatible, 10+ hours battery life, and 2.4GHz secure connection with <25ms latency for video camera app audio.
• BlueSet A wireless headset interface plugging into party-line (PL) belt packs to replace wired headsets with Bluetooth connectivity, available in female/male XLR 4-pin and 5-pin versions, with HD Voice support, mini USB power, >6 hours internal Li-Ion battery, and trim pot for Bluetooth return adjustment.
• BlueKeeper A wireless audio gateway pairing with cell phones like a Bluetooth headset, featuring send XLR input (mic/line), 3.5mm mono line input, caller XLR line output, 3.5mm stereo/mono outputs, headphone jack, 16-bit DSP with 50 dB auto null, and auto-answer capability, for recording interviews and PA system connections.
• ComPack A universal handheld telephone audio interface supporting analog phone lines (RJ-11), PBX/ISDN/VoIP handset ports (RJ-22), and wireless phone headset interfaces (3.5mm TRS), with XLR mic/line input, XLR line output, DTMF keypad, >20 hours battery life, and party-line intercom belt pack mode.
• RemoteMix 2 A two-channel field mixer and headphone amplifier with phone line hybrid and keypad, wired notebook/cell phone headset interface, two XLR mic inputs, two 1/4-inch headphone outputs, LED VU meter, and 3.5mm send/receive jacks for recording or playback, designed for remote broadcast and IFB.
• RemoteMix 3.5 A three-channel field mixer and headphone amplifier with phone line hybrid, PBX handset interface, and wired/wireless cell phone interfaces (including Bluetooth with HD Voice), three XLR mic inputs, three 1/4-inch headphone jacks, individually switchable 48V phantom power, and soft limiter, designed for sports remotes and talk show front-end mixing.
• RemoteMix 4 A four-channel field mixer and headphone amplifier with phone line hybrid and DTMF keypad, PBX handset interface, and cell phone interface (wired and Bluetooth), four XLR mic inputs with individually switchable 48V phantom power, four 1/4-inch headphone jacks with individual level and source controls, bass boost, LED VU meter, and soft limiter, designed for TV/ENG and live radio remotes.
• RemoteMix x4 (RMx4) A four-channel broadcast field mixer with four XLR mic inputs, individually switchable 48V phantom power, 120 Hz low cut filter, master XLR output (20 Hz–20 kHz), four 1/4-inch headphone jacks with individual source selector and level controls, 1/4-inch headphone cue input, and 3.5mm send/receive for cell phone or notebook IFB, powered by hot-swappable dual 9V batteries or 100-240VAC external supply.
• RemoteAmp A battery-powered personal headphone amplifier/IFB earpiece amplifier with XLR line level input, 3.5mm stereo line input, 1/4-inch and 3.5mm headphone jacks, 1/2-watt output, >20 hours on a 9V battery, Hi-Z/Lo-Z termination switch, and stainless steel belt clip for crowd noise monitoring.
• RemoteAmp Two A stereo headphone amplifier with XLR line input (with volume control) and 3.5mm stereo line input (with independent volume control), compatible with two-wire party-line intercoms (listen-only), 1/4-inch and 3.5mm headphone jacks, >20 hours on a 9V battery, designed for mono IFB plus stereo music listening.
• Interchange A half-rack intercom phone bridge providing four-wire audio interface and remote control connection for JK Audio innkeeper or AutoHybrid IP2 digital hybrids, with listen-always design, front panel channel select, front panel TRRS headset interface for mobile phones/tablets/computers, and auto-answer VoIP intercom access via the AutoHybrid IP2.
• Interchange LTD A 1U rackmount intercom phone bridge plus digital hybrid combining an internal POTS line hybrid with four-wire intercom interface, front panel cell phone headset interface, TRRS monitor headset jack with volume control, 16-bit DSP with 50 dB separation, and auto-answer, enabling remote access to party-line intercom via phone call or conferencing app.
• Outerloop A Bluetooth wireless intercom belt pack providing a wireless link to intercom systems using headset/phone mode, featuring 4-pin and 5-pin male or female XLR headset jacks, send/receive volume controls, push-on push-off talk button, >10 hours on a 9V battery, and 2.4 GHz encrypted digital wireless connectivity.
• Outerloop 3.5 A universal wired intercom belt pack for mobile devices, connecting to phones/notebooks via 3.5mm TRRS headset jack, with 4-pin and 5-pin male or female XLR headset jacks, send/receive level controls, push-on push-off talk button, and >20 hours on a 9V battery, supporting Unity Intercom and Clear-Com Agent-IC.
• Interloop An intercom-to-wireless bridge working with two-wire party-line intercom systems via 3-pin XLR male/female intercom jacks, providing Bluetooth connectivity to headsets, phones, or notebooks, featuring HD Voice support, 9 VDC battery backup, and talk button, powered by the intercom system.
• Guest Module 1 A remote keypad for JK Audio Broadcast Host, Innkeeper LTD, and Innkeeper 1x/1rx digital hybrids, featuring DTMF keypad, Call and Drop buttons, ring/call LED, passive design (no battery or AC required), powered via 8-pin RJ45 modular cable from the host hybrid.
• Guest Module Series A family of talk show system control surfaces (GM1x6, GM2x6, GM1x12 desktop and rack-mount versions) for the Concierge switch core, featuring LED line selection buttons, Next/Previous/Hold/Drop functions, DTMF keypad, auto-answer, conference calling (not GM1x6), hot-swappable operation, and aluminum/steel construction, up to eight units per system over CAT5 cable.
• Concierge 2x6 A switch core for the talk show system routing six analog phone lines to one or two JK Audio innkeeper digital hybrids, featuring two hybrid connections, six RJ11 phone line jacks, expandable to 12 lines by bridging two units, USB 2.0, auto-ring/auto-drop controls, and LED line status indicators.
• RIU-IP A remote IP interface providing web browser-based control of innkeeper 1x/1rx, innkeeper 2, and innkeeper 4 digital hybrids over Ethernet, featuring call/drop/hold/flash, dialing, conferencing, level adjustment, auto-answer, test tone control, and presence/ducking/AGC controls, connectable to LAN, hub, or internet for worldwide remote access.
• Inline Patch A telephone audio interface connecting between an analog or cordless telephone base and wall jack, providing two back-to-back hybrids for complete audio control from both sides of a call, with XLR input/output, 3.5mm stereo/mono outputs, front panel separation control, and 20 dB nominal separation, for interview recording, teleconferencing, radio/TV talk shows.
• Pureformer A stereo isolation transformer providing hum and noise reduction between sound cards and audio equipment by removing ground loops and DC paths, featuring 600 ohm audio transformers, RCA input/output, passive design (no AC or battery), 20 Hz–20 kHz frequency response, and 0.8 dB insertion loss.

Quantifiable outcome

• Achieves 50 dB transhybrid loss separation without any setup
• +2 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature5 records

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Comrex: Comrex manufactures broadcast audio codecs and remote-broadcast equipment (BRIC-Link, ACCESS, Opal), serving radio and TV broadcasters with IP audio transport — directly overlapping JK Audio's RemoteMix field mixer and AutoHybrid IP2 product categories.
• Musicam USA: Musicam USA manufactures broadcast audio codecs (Suprima, NetCoder) and related remote-broadcast equipment for radio stations. The company's codec-focused product line overlaps with JK Audio's AutoHybrid IP2 and broadcast field mixer offerings for the radio broadcaster customer.
• Tieline Technology: Tieline manufactures broadcast IP audio codecs and remote-broadcast equipment for radio broadcasters, with a comparable product portfolio of telephone interfaces, codecs, and field units that compete with JK Audio's broadcast audio interface catalog.
• Studio Technologies: Studio Technologies designs professional broadcast, production, and intercom audio products including telephone hybrids, IFB systems, and party-line interfaces — overlapping with JK Audio's innkeeper, RemoteAmp, and Outerloop/Interchange product lines.
• Henry Engineering: Henry Engineering makes broadcast audio interface and utility products (analog/digital hybrids, audio level matchers, phone couplers) for radio stations. The company is a direct competitor in telephone-audio-interface products for the broadcast vertical.
• Telos Alliance: Telos Alliance (Telos Systems, Axia, Omnia, Linear Acoustic) is the leading broadcast audio equipment manufacturer in the telephone-hybrid and AoIP category. JK Audio competes directly with Telos telephone hybrids and Omnia audio processing for radio/TV broadcast customers worldwide.

Broad incumbents

• Clear-Com (HME): Clear-Com is a leading intercom systems manufacturer (party-line, matrix, Agent-IC app) whose products are explicitly supported by JK Audio's Outerloop 3.5 and Interloop bridges. They are adjacent rather than direct competitors in the same niche.
• RTS Intercom Systems (Bosch): RTS (a Bosch brand) manufactures professional intercom systems including party-line belt packs that JK Audio's Outerloop 3.5 and Interloop products bridge into Bluetooth and IP workflows. RTS is a larger incumbent serving the same broadcast and live-event markets.
• Shure Incorporated: Shure is a major pro audio manufacturer of microphones, wireless systems, and conferencing products. While Shure's portfolio is broader and not specifically focused on telephone hybrids, it overlaps with JK Audio's broadcast customer base and Bluetooth audio interface category.
• Wheatstone Corporation: Wheatstone is a much larger broadcast audio manufacturer offering consoles, AoIP networking (WheatNet-IP), and audio processing. It serves the same radio/TV broadcast customers as JK Audio but with a broader, integrated portfolio rather than specialty telephone hybrids.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/JKAudio.inc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 JK Audio