Created 20-Aug-12
Modified 21-Aug-12
Visitors 2091
21 photos
Raidho (pronounced "Ride-o") Acoustics is one of Denmark's foremost high-end loudspeaker-makers. In its facility at Pandrup near the west coast of the Jutland peninsula, it fabricates and assembles all of its own drivers. The only items not made on-site are the beautifully finished lacquered cabinets.

Michael Borresen, Raidho's brilliant chief engineer, has designed several unique parts that are built at the Raidho facility: a quasi-ribbon tweeter with incredibly low distortion, high resolution, and broad bandwidth and power-handling; several sizes of plasma-deposited-aluminum-ceramic-oxide/aluminum/aluminum-ceramic-oxide sandwich-cone drivers (used as midranges, mid/basses, and woofers in various Raidho speakers); and a brilliantly engineered neodymium magnetic drive system, called Ceramix, in which super-powerful neo-magnets are arranged vertically in a push-pull configuration around an ingenious dual voice-coil.

Raidho's C 1.1 mini-moniotr is universally considered one of the world's greatest compact speakers, and its new, large (nearly seven-feet tall), 363-pound flagship, the $140k C 4.1 three-way, seven-driver floorstander, is likely to vie for the heavyweight title of "World's Best Transducer."

Also new is Raidho's X-Monitor LE, a $5k ribbon/ceramic stand-mount/desktop monitor that sounds exactly like a smaller C 1.1.

All photos taken handheld with Sony NEX-7 and Zeiss Biogon C 35mm f2.8 lens, and processed in Lightroom 4.1.

Raidho Acoustics, Pandrup, Denmark

Raidho Acoustics, Pandrup, Denmark

Heini Berger, Raidho front office

Heini Berger,  Raidho front office

Per Carlsen, Raidho front office

Per Carlsen, Raidho front office

Raidho's new flagship C 4.1s in the Raidho showroom

Raidho's new  flagship C 4.1s in the Raidho showroom

Raidho C 4.1: a world-class contender for "best" speaker

Raidho C 4.1: a world-class contender for "best" speaker

Raidho C 4.1, different angle

Raidho C 4.1, different angle

Tweeter holders/magnet assemblies

Tweeter holders/magnet assemblies

Raidho's superb ribbon tweeter still in its paper backing

Raidho's superb ribbon tweeter still in its paper backing

Ceramic cone mid/bass diaphragm

Ceramic cone mid/bass diaphragm

Ceramic cone mid/bass voice coil and spider

Ceramic cone mid/bass voice coil and spider

Raidho's unique vertical neodymium Ceramix magnet array

Raidho's unique vertical neodymium Ceramix magnet array

An assembly bench

An assembly bench

Assemblling Raidho's unique ceramic/aluminum cone driver

Assemblling Raidho's unique ceramic/aluminum cone driver

The huge vertical Ceramix array of Raidho's 160mm woofer

The huge vertical Ceramix array of Raidho's 160mm woofer

Lacquered C 1.1 cabinets awaiting assembly

Lacquered C 1.1 cabinets awaiting assembly

Mid/bass drivers fitted into their aluminum faceplates

Mid/bass drivers fitted into their aluminum faceplates

Worker wheels a Raidho C 3.1 into the workroom

Worker wheels a Raidho C 3.1 into the workroom

A second Raidho C 3.1 is brought into the workroom

A second Raidho C 3.1 is brought into the workroom

A pair of finished C 3.1s

A pair of finished C 3.1s

Closeup of Raidho C 3.1s

Closeup of  Raidho C 3.1s