Overview

The SMSL DA-8S was a budget integrated amplifier that offered 80 watts per channel into 4 ohms using Infineon Class-D technology. It featured Bluetooth 5.0 connectivity with aptX support, a balanced stereo XLR input alongside single-ended RCA, and a front display with remote control [1][2]. Retailer listing indicates the unit is discontinued [2].

Scientific Validity

\[\Large \text{0.5}\]

There are no credible third-party measurement reports confirmed for DA-8S as of the review date. Manufacturer/retailer specifications document output power 2×80W @ 4Ω, 2×40W @ 8Ω, efficiency >92%, inputs (balanced XLR, RCA, Bluetooth 5.0 with aptX) [2]. In the absence of independent THD+N, SNR, FR and crosstalk data, the score is kept at the policy baseline with manufacturer figures clearly labeled and cited, to be revised if third-party data appears [2].

Technology Level

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DA-8S employs established components such as an Infineon MA12070 Class‑D stage and NJW1194 volume control IC, with balanced XLR input and Bluetooth 5.0 (aptX) [1][2]. These are competent but conventional choices without evident innovation beyond contemporary norms, warranting a slightly-below-average score.

Cost-Performance

\[\Large \text{1.0}\]

Comparison target selection follows the “cheapest equivalent-or-better” rule. We require an integrated amplifier with both a balanced input and integrated aptX Bluetooth. The cheapest such product found is AIYIMA A80 (balanced TRS input, Bluetooth 5.x with aptX family) at 206.99 USD (current Amazon list) [3]. No cheaper integrated alternative with both balanced input and aptX Bluetooth was confirmed as of the review date. Therefore, by definition, CP is clamped at 1.0.

Reliability & Support

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Retailer status shows DA-8S as discontinued [2], which typically reduces parts availability and official support compared to active models. Warranty only applied during its sales period; ongoing firmware support is not applicable here. Thus, the score remains below average.

Rationality of Design Philosophy

\[\Large \text{0.5}\]

The design uses rational, proven building blocks (efficient Class‑D, NJW1194, balanced input, Bluetooth with aptX) to meet common use‑cases at low cost [1][2]. There are no non‑scientific claims. Overall, the approach is reasonable but not notably advanced, leading to a mid score.

Advice

Given its discontinued status [2], DA-8S is not recommended for new purchases. For similar functionality in current production, consider AIYIMA A80 (balanced input plus Bluetooth) [3], or pair a current integrated/power amplifier with an external aptX Bluetooth receiver if balanced input is not required.

References

[1] SMSL, DA-8S product page, https://www.smsl-audio.com/portal/product/detail/id/694.html, accessed 2025-08-12

[2] Audiophonics, “SMSL DA-8S Amplifier Class D Infineon MA12070…”, https://www.audiophonics.fr/en/integrated-amplifiers/smsl-da-8s-amplifier-class-d-infineon-ma12070-njw1194-balanced-bluetooth-50-2x80w-4-ohm-p-14585.html, accessed 2025-08-12 (shows balanced XLR input, power ratings, efficiency, package contents, and discontinued status)

[3] Amazon, “AIYIMA A80 Bluetooth Amplifier… (balanced TRS, Bluetooth 5.x with aptX family)”, https://www.amazon.com/AIYIMA-Headphone-Bluetooth-Amplifier-Integrated/dp/B0DL9PGZTM, accessed 2025-08-12 (price 206.99 USD at access time)

(2025.8.12)