Our Clients

Our experience in building audio products is not limited to analog or digital, consumer or recording industry, but expanding over the limits of one or the other. Building for diverse customers ranging from audiophile Onkyo’s high-end brand Integra Research and Klipsch, to professional recording industry brands like Undertone Audio,  Summit Audio and Shadow Hills, we got all the experience it takes to accommodate any audio designer in need of a manufacturer to build his products.

Here is a list of the past and present brand we built for:

Shadow Hills Industries

We are providing full brand managing, and that is sales, service, dealers and customer relations. Products we build are Mono Gama Mic Preamp, Dual Vandergraph dual channel VCA compressor, and Mastering Compressor dual channel VCA and optical compressor for Mastering studios.

Summit Audio

Full brand managing. Production, sales, service, relations. All Summit Audio products in full production today are listed on Summit Audio website.

BlackBox Analog        Manufacturing the HG-2 and upcoming Mic pre. The Mastering EQ is coming soon.


With a collection of 49 pieces of gear collected from the most sought after classic and modern Fender® amps (including the ’65 Twin Reverb®, ’57 Deluxe™, ’59 Bassman® LTD, ’64 Vibroverb® Custom, Super-Sonic™, Metalhead™ and many more), cabinets, stomp boxes and rack effects, AmpliTube Fender® sets a new standard for software amplifiers. A well established professional music instruments manufacturer for whom we do assembling Volume Guitar cables and connectors.

UnderTone Audio

The manufacturer of the world known recording consols entrusted us with the production, and servicing of their well appreciated MPDI-4 four channels Mic preamp, MPEQ-1 Mic Pre + Parametric EQ, and UnFairchild 670MII mastering compressor, a painstaking recreation of the classic sound of the legendary circuit. The Fairchild 670 is the grandaddy of all tube-based compressors, and has joined the ranks of the Immortals due to its rarity, price, sophistication, and, above all, sound.

Integra Research

High-End Audiophile company. Their products range from power amplifiers to tuners and Home Audio decoders and THX processors.

Burson Audio

High end Headphones Amplifiers,  DAC and USB Converters, Power Amplifiers. Distribution.

Blue Microphones

Professional Microphones
Assembling and Testing 5 types of microphones, and also assembling and testing the Robbie tube Mic Preamplifier.

We helped starting  the Blue microphones back in 2000.


At CharterOak, the customer experience is our number one priority. Music Production, Broadcast, Permanent AV Install and Sound Reinforcement Industries – Award Winning Professional Microphones, Microphone Preamps, Discrete Compressor,  Fixed Bandwidth Stereo Program Equalizer and Mono Parametric Equalizer.
Parts Acquisition, Turn-Key 12 products manufacturing, quality control, packing and shipping. Full production, service, and brand management.

Phoenix Audio

Mic Preamps, Compressors, EQ, DI Parts Acquisition, 9 products Turn-Key manufacturing.


High-End Home Audio – Home Theater system, Preamps, Power Amps, CD players DTS and THD decodersm, Computer Speaker System, Parts Acquisition, 6 product Turn-Key manufacturing, packing and shipping.

Mondial Design

High-End Home Audio – Home Theater system, Preamps, Power Amps, CD players DTS and THD decoders. Parts Acquisition, 6 product Turn-Key manufacturing, packing and shipping.


Wireless system for classrooms and educational purpose. TeachLogic systems are designed for a wide variety of applications; classrooms, training rooms, courtrooms, secure military installations, hotel breakout rooms, conference rooms, small auditoriums etc.


High-End Home Audio – Power Amps class D2 product Turn-Key assembling and packaging.


High-End Home Audio, Assembling To Turn-Key 3 models of Power Amps


High-End Audio
Assembling the legendary LE-1 Subwoofer

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