Klipsch KDA-500

The KDA-500 is an oddity in the Klipsch catalog — the Archive's coverage of the brand is almost entirely loudspeakers (Klipschorn, Heresy, La Scala, Cornwall), so this compact 1-rack-unit DSP amplifier stands apart. It's also one of those models where the surviving documentation is thin and scattered. There are no confirmed production years, no original MSRP, and no formal review coverage in the period press that I've been able to turn up. What the record does show is a versatile commercial-grade amplifier aimed at installers rather than home-audio hobbyists.

The core specification appears consistently across sources: the KDA-500 delivers 500W of class G/H power, configured as 4 x 125W, with 2 x 250W into 8 ohms and 2 x 500W into 4 ohms in bridged configurations. It's a 32-bit DSP amplifier with a fully matrixed 4x4 I/O, balanced Phoenix connector inputs, and Phoenix speaker outputs that accept up to 12 gauge wire. It offers both 70V/100V distributed-line and low-impedance operation, plus HDMI, Bluetooth, optical, and coaxial inputs, with Ethernet for control. The rear panel is labeled "Unbalanced line in 1234," and the panel drawing itself is marked "KDA500 Rear Panel Rev F."

Retailers positioned it for maximum install flexibility in both residential and commercial settings, with custom speaker presets and a "sleek, high-tech" 1U chassis. One current listing shows a price of $1,498.00, though that's a retailer's asking price, not a documented original MSRP. A single manual rating on a user site averaged 7.5 out of 10 — hardly a robust reception record. Warranty information conflicts between sources (one lists a limited 1-year, another 2 years), so I'd treat both as unreliable without the original documentation.

If you own one of these or have a copy of the original spec sheet, the Archive would love to hear from you — the gaps here are real, and the honest summary is that the KDA-500's story is mostly untold.

Known Specs

Power: 500W total (4 x 125W); 2 x 250W into 8 ohms; 2 x 500W into 4 ohms
Amplifier class: G/H
Processing: 32-bit DSP
Inputs: HDMI, Bluetooth, optical, coaxial, unbalanced line in, balanced Phoenix connectors
Outputs: Phoenix speaker connectors (up to 12 gauge)
Compatibility: 70V/100V distributed line and low impedance
Connectivity: Ethernet
Form factor: 1 rack unit
UPC: 743878030242