The SDA-2400 is Lyngdorf's compact stereo power amplifier, designed to partner the company's TDAI integrated amplifiers and MP-series processors as an additional or upgraded output stage. It suits both two-channel music systems and multi-amplifier setups such as bi-amping, where extra power is needed without adding another full-width chassis.
Digital amplification
Lyngdorf was an early pioneer of digital amplification, and the SDA-2400 builds on that heritage. The output stage uses Pulse Width Modulation with the company's patented switch-speed optimisation technology, running at a fixed switching frequency of 390 kHz. Combined with minimal feedback control, this is intended to deliver low and linear distortion alongside a high signal-to-noise ratio, addressing the hardness sometimes associated with conventional Class D designs.
Power and control
The amplifier delivers 2 x 400W into 4 ohms and 2 x 200W into 8 ohms, with a damping factor of 266 measured at 8 ohms and 100 Hz. Despite the output on offer, idle power consumption is just 25W and standby draw falls to 0.35W.
Connectivity
Inputs cover both analogue and digital sources. A single-ended RCA input and a balanced XLR input handle analogue signals, while a coaxial digital input accepts streams up to 192 kHz / 24-bit and an optical digital input accepts up to 96 kHz / 24-bit. A 12V trigger input and output allow the amplifier to be switched on and off in sequence with other components, or daisy-chained across several units.
Operation and build
Two power modes are available: automatic input detection, which brings the amplifier out of standby when a signal is present, and an always-on mode for systems that require constant readiness. The chassis is built from anodised aluminium in a matte black finish, with a compact footprint of 45 x 7.3 x 36 cm and a weight of 6.5 kg.