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S.M.S L. SP200 THX AAA 888 Headphone Amplifier Balanced Headphone OutputUsed. in great condition, has minor scuffs and scratches. Minimal hours, always plugged into a surge protector. Have two units.Includes amplifier and power cable.Ships to anywhere in the 48 contiguous US states.------------------------------------------------------------------------------FEATURES:THX AAA-888 TechnologyUltra-Compact design - great for desktopToggle switch for operation, input selection, and gain controlBalanced stereo headphone outputBalanced stereo line inputHigh precision resistors for temperature stabilityPop-less design with high quality relaysSelected high precision low-distortion volume potentiometerFull protection with DC, over-voltage, over-current, and short-circuitThermal protection on headphone amplifierHigh-efficiency ultra-low noise power supplySPECS:Inputs: Balanced x 1, Unbalanced x 1Outputs: Balanced x 1, Unbalanced x 1Output Power:6W x 2 (16ohm)3W x 2 (32ohm)440mW x 2 (300ohm)220mW x 2 (600ohm)SNR: 130dB, A-WeightedOutput Noise: 2.8uV, A-WeightedTHD+N: -122dB, 0.00007% (1kHz, 32ohm)THD+N: -117dB, 0.00013% (20 - 20kHz, 32ohm, -3dB)THD: -125dB, 0.00006% (1kHz, 16ohm, -3dB)Output Impedance: Near 0ohmFrequency Response: 0.1Hz - 500kHz(-3dB)Gain: Low(+6dB), High(+18dB)
At US$110, this sits well below the recent used median of US$150 and even under the 25th percentile of US$130, so it reads as a strong deal rather than just a fair price. Against its original new-street pricing, that’s the kind of asking number that should get an enthusiast’s attention quickly.
The SP200 has a solid reputation as a clean, low-noise, high-power desktop headphone amp with plenty of drive for demanding cans and a straightforward, no-drama sound. If the unit is working properly and comes with the essentials, this is the sort of used buy that makes sense: well-regarded, current enough to stay relevant, and priced low enough to leave room for a future resale or a complementary DAC.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
SMSL, founded in 2009 as Foshan ShuangMuSanLin Technology Co., Ltd. in Shenzhen, China, emerged from the country's burgeoning tech hub to specialize in digital audio innovation. The company quickly expanded with a Hong Kong branch, VMV Technology, in 2013, targeting higher-end exports and establishing a global footprint across more than 30 countries. Its early focus on domestic sales laid a solid foundation, evolving into a recognized name in affordable hi-fi.
The brand excels in digital-to-analog converters (DACs), headphone amplifiers, and power amplifiers, delivering high-performance components like the iconic Sanskrit series—featuring DACs, preamp-capable headphone amps, and linear power supplies. SMSL emphasizes in-house R&D for stylish, well-built devices incorporating premium technologies such as THX AAA-888 amplification, prioritizing audio fidelity without unnecessary frills.
Positioned as a mid-tier leader in the value-driven hi-fi market, SMSL earns praise for punching above its weight, offering audiophile-grade sound at accessible prices that rival pricier competitors. Popular among discerning buyers seeking reliability and transparency, it stands out for meticulous component selection, though some note occasional quality concerns with budget imports. For the knowledgeable enthusiast, SMSL represents smart, modern Chinese engineering at its finest.
See all SMSL listings on RADAR.
