Jupiter Condenser Co. is a Hudson, Ohio-based manufacturer of vintage-style audio-grade capacitors, wiring, and guitar speakers. Despite the name, the company has no connection to condenser microphones — "condenser" is the older term for a capacitor, and the company specializes in faithful recreations of the paper-in-oil, wax-and-paper, and electrolytic capacitors used in classic tube amplifiers and audio gear from the golden era of American electronics.

The company's catalog includes the Yellow and Red Astron paper-in-oil lines, the Bumblebee reissue, the Cosmos wet electrolytic series, and variants built with silver, copper, and aluminum foil. They also produce cotton- and silk-insulated silver and copper hookup wire, along with the Jupiter Speakers line of vintage-voiced American-style guitar speakers. Products are marketed toward boutique amp builders, high-end audio designers, and guitarists chasing the tonal character of vintage components.

Jupiter Condenser parts are used by a range of boutique amp and audio manufacturers, including Carr Amplifiers, Dr. Z Amplifiers, Milkman Sound, Nagra, and Zu Audio. The brand has developed a reputation within the tube amp and high-end audio communities as a go-to source for tone-focused passive components.

Jupiter Condenser Co. has 2 products cataloged on Equipboard, including Guitar Amp Speakers.