Paul Klipsch once said, "What this country needs is a good 5W amplifier," and Sam Tellig of Stereophile brought the line up when he reviewed a DeVore Fidelity speaker. John DeVore builds speakers for people who own that kind of small amplifier and have no room for a giant horn. He told Tellig that efficiency is only half of it, and that impedance, how hard the speaker resists the amplifier, matters just as much. His Orangutan speakers stay easy on an amplifier, which Tellig noted makes them very tube-friendly. They also have wide, shallow cabinets, which DeVore says help project sound out into the room. Herb Reichert, returning to his own O/93s after another pair of speakers, heard "punch, texture, and raw drive," and Alan Sircom of Hi-Fi+ found the O/93 "quite taut and energetic sounding." DeVore Fidelity suits listeners with small tube amplifiers who want a big sound in a city apartment.

The range has two families. The gibbon series goes back to DeVore's first designs and keeps the cabinets narrow, and DeVore recommends aiming the Gibbon Super Nine straight ahead with no toe-in. The wide Orangutans are the heart of the line. Start with the O/93, the one-piece model. Tellig found that about 12 watts was more than enough to give it strong, tight bass. The O/96 is the step up, with its own wooden stands, and Paul Miller of Hi-Fi News reported in 2021 that it was still the brand's top seller. For a smaller room there is the O/baby, which DeVore describes as essentially a miniaturized O/96. Spend time on placement. Steve Guttenberg moved his O/babies to a different wall and "everything just really clicked." He ended up with very little toe-in and the backs about 15 inches from the wall, and he got deep bass from a small speaker.

Before he designed speakers, John DeVore sold them. Steve Guttenberg says DeVore worked as a high-end audio salesman at Sound by Singer in New York, as Guttenberg did, and believes all those demos shaped his designs. DeVore founded the company in 2000, and in 2005 Stereophile wrote that its products had "pulled down critical kudos and consumer raves that more established companies would kill for." The workshop, called the Monkeyhaus, is in the Brooklyn Navy Yard. The Gibbon Nine had a habit of staying with its reviewers. Jim Austin of Stereophile wrote a check for his review pair in 2008, noted that several other reviewers bought theirs too, and still had them as his main speakers ten years later. The O/96 followed in 2012, and Art Dudley made it his reference. The O/baby borrows from the top of the range. Guttenberg points out that its small silk-dome tweeter is the same one the flagship O/Reference uses as a supertweeter, put to work in the smaller speaker as a regular tweeter.