--- product_id: 4149517 title: "S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black" brand: "s.m.s.l" price: "€ 3.08" currency: EUR in_stock: false reviews_count: 4 url: https://www.desertcart.pt/products/4149517-s-m-s-l-sd-793ii-optical-coaxial-dac-digital store_origin: PT region: Portugal --- # Built-in headphone amp for immersive sound Supports coaxial & optical inputs for versatile connectivity Precision CNC aluminum shell with anti-skid knob S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black **Brand:** s.m.s.l **Price:** € 3.08 **Availability:** ❌ Out of Stock ## Summary > 🎶 Elevate your audio game with precision and power ## Quick Answers - **What is this?** S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black by s.m.s.l - **How much does it cost?** € 3.08 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/4149517-s-m-s-l-sd-793ii-optical-coaxial-dac-digital) ## Best For - s.m.s.l enthusiasts ## Why This Product - Trusted s.m.s.l brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Output Options:** Supports both RCA and headphone outputs for flexible audio setups - • **Premium Build Quality:** Durable CNC-machined aluminum chassis with elegant oxidation finish - • **Audiophile-Grade Chipset:** DIR9001 + PCM1793 + OPA2134 deliver crystal-clear, high-fidelity sound - • **Versatile Input Compatibility:** Seamlessly connects with computers, TVs, CD/DVD players via coaxial & optical jacks - • **Integrated Headphone Amplifier:** Front 6.35mm jack powers high-impedance headphones with rich detail ## Overview The S.M.S.L SD-793II is a high-performance DAC and headphone amplifier featuring the acclaimed DIR9001, PCM1793, and OPA2134 chipset combo. It supports both coaxial and optical digital inputs, outputs via RCA and a front 6.35mm headphone jack, and boasts a CNC-machined aluminum shell with an anti-skid knob, making it a sleek, versatile upgrade for discerning audiophiles and professionals alike. ## Description SMSL SD-793II decoder uses the advanced digital receiver chip DIR9001, it can receive 24bit/96K signals at the highest. DAC adapt the one of the best D/A decode PCM1793 chip(192K/24Bit convert chip). Use active low pass filteroutput (sealed pack OPA2134, user an change this IC to adjust sound). SMSL SD-793II decoder can work with coaxial and optical jacks on computer LCD, TV, CD, DVD, MD. Specification: Input interface: coaxial or optical fiber(with switch) Input frequency:44.1, 48, 96KHZ/16/24BIT SNR: > 113dB Dynamic range: 105dB Distortion: 1KHZ% under 0.0006 Rated output: 1.7VPP Frequency response: 20 - 20KHz( - 0.2dB) Total output power: <8W Headphone output power: 65mW @ 16Ω; 130mW @ 32Ω Headphone output distortion: 0.01% THD + N @ 100mW/32Ω ## Features - SMSL SD-793II decoder can work with coaxial and optical jacks on computer LCD, TV, CD, DVD, MD - It uses the classic match chipset dir9001+pcm1793+opa2134, can reach a very good sound - Built-in headphone amplifier,6.35mm headphone jack on the front panel - Supports RCA and headphone jack output - SD-793II using aluminum shell, CNC high-precision process, drawing oxidation, custom solid aluminum knob (anti-skid design) ## Product Details - **Brand:** S.M.S.L - **Maximum Supply Voltage:** 2.4E+2 Volts (AC) - **Mounting Type:** Coaxial - **Number of Pins:** 24 - **Interface Type:** Coaxial ## Images ![S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black - Image 1](https://m.media-amazon.com/images/I/61MJ+nLxu3L.jpg) ![S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black - Image 2](https://m.media-amazon.com/images/I/61EXWJCr3cL.jpg) ![S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black - Image 3](https://m.media-amazon.com/images/I/71LtAb3WrxL.jpg) ![S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black - Image 4](https://m.media-amazon.com/images/I/61YebKsRhPL.jpg) ![S.M.S.L SD-793II Optical Coaxial DAC Digital to Analog Converter Built-in Headphone Amplifier Black - Image 5](https://m.media-amazon.com/images/I/71OTOal6o3L.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Simple and Clean - Perfect Addition to any Headphone setup *by J***E on January 31, 2016* Works as advertised. I tried it with various sources and everything sounds great--no noticeable problems or issues. My unit is crystal clear without any background noise even with the volume maxed out. It ran cool for hours without any heat build up. Build quality is simple but solid. Packing and instructions are also minimalist and plain. This is not meant to be fancy, which is fine by me as I just want something that works with no frills. 1/4" TRS jack is a plus.The only caveats are the front LED lights are a bit nonsensical in operation (they both toggle for input selection as well as an active link--you have to see it to understand that it is a bit non-intuitive) and hard to see at off-angle; and the coax and optical connectors are a bit close together, so that if you have a large sized plug they may not fit side by side.The sound quality is neutral, just the way I like it, though some might want more warmth or fullness to their sound. I think this is a great deal for the price. ### ⭐⭐⭐⭐ Quality control marginal but great sound. Wired beats wireless. *by L***X on May 15, 2018* The first one I got from amazon seller smsl died in about two hours of use. No problems returning it for a full refund including shipping. I ordered a second one from Shenzhen amazon seller and it has been working great for weeks.I use this with my Samsung tv for night listening to avoid waking up the house. I originally tried the Roku remote with headphone jack but got frequent dropouts probably due to the wifi transmission. I tried Bluetooth headphones but didn’t like recharging often. Both these wireless solutions had passable but not great sound quality and were weak in low frequencies.This DAC has sound quality that just sounds effortless and pure through my koss porta pro headphones. And it has plenty of signal to drive these high efficiency headphones louder than I would ever need.What was disconcerting was the differences between the two units I got from the different sellers/lots. The LEDs were different brightness and patterns, and whereas the smsl unit had non locking buttons the Shenzhen unit had locking buttons that mechanically had in and out positions. This tells me that they have very loose specs around parts and just use whatever is cheapest and or available.But this strategy works: I got a unit for very cheap price that has sound quality in the same class as my old Denon $2000 receiver with burr brown DACs. It was worth the hassle of dealing with a defective unit.It is definitely worth taking the time to run a toslink cable around the baseboards from tv to the couch to avoid the hassles of wireless. And this works just fine with a 25 foot Toslink and 25 foot headphone extension.One annoyance is that there is a mechanical relay inside which clicks every time the audio signal comes or goes. This means you hear the clicking every time a tv program starts, and it clicks when pressing pause or switching sources. The signal doesn’t have any clicks (once I made sure I wasn’t feeding it 5.1 formats; set your source to pcm) but the sound comes from the box itself. Not an issue once used to it but it seems strange to use a mechanical relay in this day and age. I don’t remember the relay clicks from the first unit so again this may be a part difference. Or maybe I didn’t have a chance to notice it on the first unit before it died.Unlike other reviews I found the toslink connector to be perfectly tight with the bluerigger cable sold on amazon.Enjoy! ### ⭐⭐⭐ -HD 558 -Beyer-dynamic 990 250 Pros It powered the HD558 great, since they are around 50ohn *by A***A on June 21, 2016* I bought it in Feb of 2016....long story short. It works very well but....it just broke on me. Literally just right now, it stopped working.Changed wires, uninstalled/re-installed software for sound card...no sound.This item was well taken car of and in a area where there was a lot of ventilation.Not sure what happened.Overall, the item did it's job,to amp up my headphones.-HD 558-Beyer-dynamic 990 250 ProsIt powered the HD558 great, since they are around 50ohn.Beyer's...ehh. It did power them but..... not loud enough.Overall, it's a good item, just be warned, it might break on you, it might now. So far, this is the first product I buy from SMSL. I will give them one more change, i'll buy a different headphone amp. If it breaks again, then so long and goodluck to you SMSL.I suggest get warranty, just in case. ## Frequently Bought Together - SMSL SD793-II PCM1793 DIR9001 DAC Digital Audio Decoder Amplifier - Black - S.M.S.L SU-1 MQA MQA-CD Audio Decoder AK4493S XU316 768kHz/32Bit DSD512 Hi-Res DAC - Monoprice 1.5ft Premium 2 RCA Plug/2 RCA Plug M/M 22AWG Cable - Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/4149517-s-m-s-l-sd-793ii-optical-coaxial-dac-digital](https://www.desertcart.pt/products/4149517-s-m-s-l-sd-793ii-optical-coaxial-dac-digital) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-02*