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Lyngdorf Audio SDA-2400
The versatile SDA-2400 stereo power amplifier features both analog and digital inputs, as well as a range of novel features to deliver outstanding performance in a wide range of applications.
Perfect for any setup
It includes both optical and coaxial digital inputs in addition to the traditional balanced and single-ended analog inputs in order to fit any possible setup. This power amplifier can function in a traditional stereo or multichannel setup—but also as a powerful addition to single standing media players and streaming devices with integrated volume control. Using the digital connections, there will be no interference or noise from external sources. The digital inputs are based upon the Wolfson WM8804 PLL Transceiver for excellent dynamic performance and improved tolerance to clock jitter.
Smart power
The SDA-2400 will automatically go into stand-by mode when not in use. When the amplifier detects a signal, it will turn on automatically. You can set it to always be on—and if your connected device has a 12V trigger output, this can control the power state of the SDA-2400, and even daisy-chain several SDA-2400 amplifiers.
Lyngdorf is the pioneer in digital amplifiers, and the SDA-2400 power amplifier is not your typical Class D power amplifier. It’s better. It has very low and linear distortion and an impressive signal-to-noise ratio, making it the perfect choice for those seeking the purest sounding high-power amplifier on the market.
The output stage uses Pulse Width Modulation with a patented switch speed optimization technology. Together with a fixed switching speed of 390 kHz and minimal feedback control, this ensures low and linear distortion compared to typical Class D amplifiers.
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Lyngdorf SDA-2400
The SDA-2400 is a slim, high-power switching amplifier that pairs reference-class dynamics with an unusually low noise floor. Jim Milton at HomeTheaterHifi reported authoritative, tight bass, natural mids and sparkling treble while preserving fine decay and microdetail. Its 2 x 400 W output and high damping factor deliver excellent transient control and percussion impact, yet the sealed anodized-aluminum chassis stays cool during long sessions. Connectivity includes balanced XLR, single-ended RCA and digital coax/optical inputs for mixed digital/analog systems. The SDA-2400 suits listeners seeking a powerful, transparent two-channel amp for delicate classical recordings or dynamic rock. With measured performance, refined build and quiet operation, it’s a compelling Class D option for audiophiles who want efficiency without sacrificing musicality.
Pros
- Exceptionally low noise floor and transparency that preserves microdetail and natural decay.
- High dynamic power and speaker control (2 x 400 W, high damping factor) producing tight bass and impactful percussion.
- Slim, well-built sealed aluminum chassis with excellent thermal behavior—runs cool after hours of listening.
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Cons
- Audio input trigger can be insensitive to very soft signals, causing a delayed power-up that may clip the start of quiet tracks.
Sound Quality
92/100
Dynamics
93/100
Reviewers describe the SDA-2400 as a "highly dynamic switching amplifier" with "plenty of dynamic power on tap" and state it has "the same amount of dynamic power as my monos." The amp's 2 x 400 W @ 4 Ω rating and high damping factor (266) support excellent transient headroom, speaker control and grip for a modern Class‑D switching design; reviewers also praised impact on percussion and authoritative bass. These factors (high power, switching topology, high damping factor and explicit reviewer praise about authority and low distortion) justify a top-tier dynamics score.
Soundstage Imaging
90/100
The reviewer reports "excellent" stereo separation, a "wide and deep sound stage" and that imaging was "very good" and "big and solid." The amp preserves spatial cues and depth even when driving demanding material, per the listening impressions, which supports a near‑reference level score for imaging and channel separation.
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Build Quality
90/100
Physical notes: slim anodized‑aluminum chassis, "very solid construction," low weight (6.5 kg) and rack kit included. Thermal behavior is excellent — the unit ran cool after many hours of high-volume listening and "never even became warm to the touch," and the spec sheet shows substantial heat dissipation and robust damping factor, all indicating a well-engineered power supply/thermal solution. Overall construction and thermal management earned high marks from the reviewer.
Value for Money
86/100
MSRP cited in the review: $2,400. For that price the SDA-2400 delivers substantial measured and subjective performance (2 x 400 W @ 4 Ω, high damping factor, low noise floor) that compares favorably with other high-power switching amps in the $2–3k segment. The reviewer praises its performance strongly but does not explicitly comment on price/value tradeoffs, so a neutral-to-positive baseline rating is applied rather than an explicit 'best value' endorsement.
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