AKG C4000

A large-diaphragm condenser that AKG pitched as the world's first true one-inch dual-diaphragm backplate capsule, and priced to undercut the studio establishment.

Overview

The C4000 came with a claim attached. AKG's own advertising billed its capsule as "the world's first true 1-inch dual-diaphragm backplate condenser capsule," carefully tuned to preserve the integrity of the source. That is marketing copy, not a measurement. It does show where the mic sat in the market: a large-capsule multipattern condenser for project studios that wanted studio-grade behavior without studio-grade prices. Mix (May 1999, p.55) carried the launch copy. This was a late-1990s product, and it landed in a crowded field of affordable large-diaphragm condensers.

The trade press saw more in the C4000 than the capsule geometry. Contemporary coverage grouped it with AKG's push into large-diaphragm condensers for the project market, alongside the C3000 cardioid and the Solidtube. Collectors should know that sources refer to both the C4000 and the C4000 B, and the B appears to be the designation used in the launch-era review coverage. Anyone buying used should confirm which variant a listing actually describes.

The multipattern capability was the headline feature for working engineers. Mix (July 1999, p.121) reviewed it as a multipattern condenser and noted a self-noise figure of 8 dBA measured against the DIN 45 412 scale. That is a quiet number for a mic in this class, and it counts when you're close-miking a quiet source or tracking in a small room. The review package as priced included the AKG H 100 spider-type shock mount and the W 4000 wind/pop screen, so the retail box was a complete working kit rather than a bare mic.

An EQ magazine session account from the period documents the C4000 used as a room mic on a drum kit. It was not the close mic on kick or snare. It was the ambient capture, picking up the whole kit from a distance.

The C4000 is not a C 414, and collectors don't treat it as one. It sits a tier below, a workhorse multipattern condenser from the project-studio boom, and it's priced accordingly on the used market. That's not a knock. A buyer can get large-capsule multipattern AKG behavior for a fraction of what a 414 commands, and the 8 dBA self-noise figure from Mix's field test suggests the quietness wasn't sacrificed to hit the price.

The catch, as with any discontinued condenser of this vintage, is condition and parts. Capsules age and grilles dent. The shock mount and pop screen that shipped with the original kit are frequently missing from secondhand listings, and the H 100 mount is part of what made the package usable out of the box. Buyers should expect to source those separately and factor that into the price. Documentation on production years and original US pricing is thin in the available record. The Mix field test cites $848 for the kit, which gives a sense of where it sat new.

For a budget project studio that wants a multipattern large-diaphragm condenser with a quiet-noise spec and documented session use, the C4000 is a sensible choice. It won't appreciate like a 414. It will do the room-mic job.