--- product_id: 56513326 title: "S.M.S.L AD18 Audio HiFi Stereo Amplifier with Bluetooth 4.2 Supports Apt-X,USB DSP Full Digital Power Amplifier 2.1 Small 80Wx2 Class D Amplifier with Subwoofer Output | 2.1 Subwoofer Supports Apt-X USB DSP 80Wx2 Audio HiFi Class D Amplifier Bass and Treble Control For Home Audio/PC/Speaker" brand: "s.m.s.l" price: "₩402645" currency: KRW in_stock: true reviews_count: 13 url: https://www.desertcart.kr/products/56513326-s-m-s-l-ad18-audio-hifi-stereo-amplifier-bluetooth store_origin: KR region: South Korea --- # Bluetooth 4.2 with apt-X & NFC pairing 80Wx2 powerful stereo output ±8 level bass & treble digital EQ S.M.S.L AD18 Audio HiFi Stereo Amplifier with Bluetooth 4.2 Supports Apt-X,USB DSP Full Digital Power Amplifier 2.1 Small 80Wx2 Class D Amplifier with Subwoofer Output | 2.1 Subwoofer Supports Apt-X USB DSP 80Wx2 Audio HiFi Class D Amplifier Bass and Treble Control For Home Audio/PC/Speaker **Brand:** s.m.s.l **Price:** ₩402645 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your sound game—where power meets precision in a sleek digital amp. ## Quick Answers - **What is this?** S.M.S.L AD18 Audio HiFi Stereo Amplifier with Bluetooth 4.2 Supports Apt-X,USB DSP Full Digital Power Amplifier 2.1 Small 80Wx2 Class D Amplifier with Subwoofer Output | 2.1 Subwoofer Supports Apt-X USB DSP 80Wx2 Audio HiFi Class D Amplifier Bass and Treble Control For Home Audio/PC/Speaker by s.m.s.l - **How much does it cost?** ₩402645 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/56513326-s-m-s-l-ad18-audio-hifi-stereo-amplifier-bluetooth) ## 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 - • **Precision Audio Control:** Customizable bass and treble adjustments with patented SDB sound restoration let you tailor every note to your vibe. - • **Dual Independent Circuits:** Separate headphone and speaker amplifiers guarantee pristine sound whether you’re in solo mode or sharing the experience. - • **Seamless Wireless Connectivity:** Bluetooth 4.2 with apt-X and NFC ensures effortless, high-fidelity streaming from your favorite devices—cut the cords, not the quality. - • **Immersive 2.1 Channel Powerhouse:** Dual 80W Class D amps plus dedicated subwoofer output deliver room-filling, crystal-clear sound that commands attention. - • **Compact, Interference-Free Design:** Sleek aluminum chassis with advanced DSP and TI chips ensures ultra-low noise and zero phase shift for audiophile-grade clarity. ## Overview The S.M.S.L AD18 is a compact, full digital Class D amplifier delivering 80W per channel with a dedicated subwoofer output. Featuring Bluetooth 4.2 with apt-X and NFC for high-quality wireless streaming, it supports multiple digital inputs including USB, coaxial, and optical. Equipped with advanced Texas Instruments DSP chips and patented SDB sound enhancement, it offers precise bass and treble control alongside independent headphone and speaker amplification, making it a versatile powerhouse for home audio and PC setups. ## Description AD 18 is a small full digital class d bluetooth amplifier built-in headphone amplifier supports subwoofer output.Connect it to your computer and use it to drive your headphones with an amplifier or to power your passive speakers(4ohm speaker produces 80Wx2 output power).Sophisticated matting aluminum housing reduces interference. Patented SDB sound and +-8 level treble and bass adjustment. Independent headphone amplifier design and advanced DSP technology makes the unit more desirable. CS8422 it mainly act as a signal convertor. It receive optical and coaxial signal and all signal transfer. TAS1020B support stereo sound 16bit/24bit and sampling rate up to 96kHz. For much better sound, we use SDPI output instead of internal DAC output design. Strong/anti-interference ability and more high-fidelity. HP Amplifier Chip:MAX97220A analog/digital convertor IC:CS5341,Accurate to 24 bit 48kHz. Convert AUX signal to digital signal. Then digital signal processing by CS8422. Customized BT4.2 Bluetooth Module Device easily connect with bluetooth by NFC. External Antenna Distance range up to 10M or more AD18 uses digital amplify circuit. All analog signal convert to digital signal to make PHASE of input and output signal keep same. Phase shift is zero. Strong anti-interference ability. High efficiency up to 90%. TAS5508C for digital signal DSP processing and Pre-Amp. TAS5342A for digital signal rear-AMP. It will be through LC filter and then send to amplifier output jack. ## Features - 【Digital Input】The SMSL AD18 has 6 input methods, USB, coaxial, analog, Bluetooth and two optical fibers, using two different chips for SPDIF and USB input. The USB comes from Texas Instruments' TAS1020B. The chip fully supports 24bit/96khz, and any excess will be automatically downsampled. SPDIF uses Cirrus Logic's CS8422. The chip can decode files up to 24bit/192khz, but can only decode up to 96kh on the AD18. - 【Bluetooth and NFC】The Class D amplifier allows you to Bluetooth BT4.2 Bluetooth input, Bluetooth supports apt-X, and easily connects Bluetooth via NFC, providing higher quality wireless playback for compatible , tablets and Android smartphones. - 【Two Independent Circuits】The S.MS.L ad18 bluetooth amp has two independent circuits, one for speakers and one for headphone output. It also has a subwoofer active subwoofer output, 80Wx2 amplifier output, with amplifier output, which can provide unparalleled stereo audio for speakers. 3.5mm headphone jack, the headphone amplifier - 【Bass and Treble Control】SMSL Audio Stereo Amplifier This all-in-one amplifier is also equipped with a digital equalizer with multiple functions (bass tuning, treble, etc.), built-in SMSL patented sound effect SDB, SDB can effectively improve the sound restoration, while dynamically adjusting the high and low sounds according to the current music signal. - 【SMSL AD18 chip】Full digital amplifier is part of the new generation of FDA all-digital amplifiers. It uses high-tech TAS5508C and TAS5342 chips using Texas Instruments (TI) digital pure path technology. The amplifier has the characteristics of "all-digital", compact design, high sound quality and high resolution, bringing a wonderful experience to music lovers. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B071JN7GXN | | Best Sellers Rank | #110,502 in Electronics (See Top 100 in Electronics) #667 in Audio Component Amplifiers | | Brand Name | S.M.S.L | | Customer Reviews | 4.3 4.3 out of 5 stars (990) 4.3 out of 5 stars | | Global Trade Identification Number | 00790996171746, 06970141852605 | | Included Components | amplifier | | Item Dimensions | 6.77 x 2.01 x 3.35 inches | | Item Weight | 1.3 pounds | | Manufacturer | SMSL | | Maximum Output Power | 80 watts | | Maximum Supply Voltage | 24 volts | | Model | AD18 | | Mounting Type | Coaxial,Plug Mount | | Number Of Channels | 2 | | Output Power | 80 watts | | Package Type Name | box | | Part Number | AD18 - Bluetooth | | Specification Met | CE, FCC | | Unit Count | 1 Count | | Upc | 651312006145 790996171746 619191169320 612032784676 | | Voltage | 220 volts_of_alternating_current | | Warranty Description | 1 year | ## Product Details - **Item dimensions L x W x H:** 6.77 x 2.01 x 3.35 inches - **Manufacturer:** SMSL - **Maximum Supply Voltage:** 24 volts - **Mounting Type:** Coaxial,Plug Mount - **Voltage:** 220 volts_of_alternating_current ## Images ![S.M.S.L AD18 Audio HiFi Stereo Amplifier with Bluetooth 4.2 Supports Apt-X,USB DSP Full Digital Power Amplifier 2.1 Small 80Wx2 Class D Amplifier with Subwoofer Output | 2.1 Subwoofer Supports Apt-X USB DSP 80Wx2 Audio HiFi Class D Amplifier Bass and Treble Control For Home Audio/PC/Speaker - Image 1](https://m.media-amazon.com/images/I/616WOahWKnL.jpg) ## Questions & Answers **Q: Were is the subwoofer connection?** A: Coax/opti1 is supposed to be a sub out also. I've heard earlier models did not function this way, but recently purchased units through Amazon should work. You'll need a 3.5 aux to rca cable for it to function I believe. I hooked up a powered sub to mine using the high level speaker inputs on the sub. **Q: What is the rated power output per channel at 8ohms, and the THD%?** A: The rated power output is 45w+45w @8ohm, THD + N = 0.04% **Q: When using the sub-out with a powered sub can the sub volume or levels be controlled via this unit?** A: Yes, and no. The SMSL's sub output level is variable, and raises/lowers in sync with the amps volume position, but you still have to set the master volume (for the sub) on the powered sub itself. I've got mine parked at about the 11 o'clock position, but results will vary depending on your setup. You will also need to find the crossover sweet spot on the subs low pass filter control. **Q: What is the frequency range of the input/output of the waveform?** A: It happens often ## Customer Reviews ### ⭐⭐⭐⭐⭐ Finally: A DAC that does it all! *by on Reviewed in the United States March 28, 2018* Wow. Just awesome! I purchased this DAC/amp for a specific purpose, but even without that need, I would have bought this little gem because I've been waiting for a product like this for a long time. This little guy offers much more than your average DAC or DAC/Amp combo. Given the reasonable price and extensive list of features and capabilities, it's impressive to me that this little amp does everything that it does, and does everything at least adequately well. Most of what it does, it does very well, and a few things (including power output and sound quality) it does exceptionally well.There have been many nice DACs or DAC/Amps on the market for some time now, but there was always some limiting factor when you bought one (including high price). For example, I also own the Audioengine D1, which is a fine little DAC/Headphone Amp, but it is only usable with powered speakers or headphones. It gives you only 1 USB and 1 optical input, but no analog input, no COAX input, no speaker amp, and no Bluetooth. The S.M.S.L. AD-18 gives you 2 Optical inputs (44.1KHz-192KHz/24 bit), A COAX input (44.1KHz-192KHz/24 bit), a USB input (44.1KHz-96KHz/24 bit), an Aux analog input, Bluetooth (4.2), a Sub-woofer output (line level), L/R speaker terminals (5-way binding posts with 80 watts/channel @ 4 ohms), a built in headphone amp with 3.5mm output (front), bass/treble/volume controls, 7 preset EQ's, a remote control, and a nifty display screen! The D1 has a decent headphone amp (a little stronger the the AD-18's actually), but no speaker amp, and that's what I needed for my bookshelf into computer desk speakers project.Many of us out there have noted, with some sadness, at what passes muster for good sounding speakers these days. This is especially true for those products that slide the word "computer" in front of speakers. Basically, they suck for the most part, unless you are willing to spend way too much $$ for overpriced powered speakers that have (IMO) just average sound quality. For anyone out there like me, with a pair of really great sounding passive bookshelf speakers which they would love to use again, or use as computer speakers, then this is the amp for you! I have an old pair of Advent AR1122's that positively sing as oversized computer speakers now that the AD-18 is powering them! I used the line level sub output to add a powered Polk sub-woofer, and the sound with this combo is just amazingly full, rich and dynamic. The sound quality is sweet and detailed even at very low volume levels, and is impressively lively and powerful, with no harshness, when playing near the full-monty level.I had not expected that. I expected that the AD-18 would be an improvement over other DAC/amps in terms of connectivity and functionality, but not sound quality. It sounds significantly better than other DAC/Amps I've heard. I certainly didn't expect it to rival some full size stereo receivers in terms of power and clarity, but it definitely does. The AD-18 sounds very, very, good indeed, and for an audio product, that's easily the most important thing.So, what needs improvement? Well, if S.M.S.L. is reading these reviews, then the following is my suggestion box for your already great product:Headphone amp - For the vast majority of people out there, the Headphone Amp on the AD-18 will be more than adequate, especially considering what it's usually replacing (computer/phone HP jack). However, for those folks that have high impedance headphones, you may want to look at a dedicated high output headphone amp instead. The HP amp on the AD-18 works fine on my Grado's, so that's all I care about, but if S.M.S.L. wanted to add more power there, it would certainly widen the fan-base for the AD-18.Additional Outputs: It's not a must have, but it would be really nice if there was a line level analog output. Also, a digital output with pre/post or bit-stream output would be really nice, but that might raise the cost too much. Still it would be a nice and useful addition.In conclusion - this is a fantastically good product, that, if it lasts, will also be an exceptional value. I like it so much that I just bought a second one for another project!Note: Video was updated to prove to the doubters that 'Yes indeed, it can - power those in-efficient speakers!' In this case it was a pair of B&W DM 610's. Sounded beautiful, and LOUD!**UPDATE - July 17, 2019**After reading several negative comments about this product, claiming that it is a poorly designed piece of junk, I felt it necessary to update my original review. I have 3 of these units, and I can say that it is definitely a 5 star product. The one on my desktop, has been in daily service for more than a year, and is just as impressive today, as the day I unboxed it. I imagine that some of the negative reviews are genuine, but I believe that many of them are from competitors, trying to steer people away from this excellent, segment leading, product. If you're in the market for a desktop, workshop, or even main stereo amplifier, with excellent sound, power, and features at an affordable price, then shop no further because this is the one you want! Don't be dissuaded by the naysayers. This is a fantastic and RELIABLE product. ### ⭐⭐⭐⭐⭐ Um... How? *by on Reviewed in the United States September 16, 2019* This is a long one. I had been looking for a replacement computer speaker set and getting wholly frustrated. I finally decided to try something else. This SMSL amp is much more than I imagined it would be. Being class D it barely gets warm under load. Not to mention the quality is surprisingly good. I am running Optical off my ASUS Tuff motherboard to the unit. The speakers of choice are old Samsung units off a surround unit purchased for $20 from ebay. The sub is a Polk home unit PSW110. Its WAY over kill for any computer set, and sounds AMAZING. I do wish it had Hi pass for the speakers so I could adjust them but the Samsungs seem to be doing ok. Much better than the Sony set I tested first.Now the "whaaaat???". The speakers are 3 ohms and I have noticed no issues whatsoever. No clipping, no power drop, no distortion. Oh and its RIDICULOUSLY loud if you aren't careful with the volume.Design wise its much smaller than expected and the screen is a little tough to read. It could use a selection button for headphone/Speaker. Instead you have to click the main dial twice then switch and then wait to turn up/down the volume. However this allows me to leave my 3.5mm splitter plugged in (I run Sennheiser Game 1 for PC and Xbox). Note: The Sennheiser Game 1 I still have to max out the volume, something that drives me nuts on the Xbox as well. However a pair of HD515 were near blasted out at full headphone volume. I believe the volume adjustment on the Game 1's is the culprit, not the amp. For such a quality amp, a 6.35mm plug would have been a better choice. OR a mic input in the rear and a gaming 3.5mm out in the front.One major complaint. The volume is placed way too close to the headphone out.The other minor complaint is the silly 3.5mm to Coax needed to run a subwoofer (you will need to buy one) and then you get to guess which side is the sub.I have no doubt this could power large bookshelf speakers based on preliminary testing.Considering getting a second one to power speakers in the garage (plan on using some Polk 6.5 components I have lying around from my last car). However I have no way to power a sub in this case so I am looking at other options as well.Bottom Line: EXCELLENT value for the money. Small, powerful, and great sounding. This is a tough little guy to beat. Will test NFC at a future date and update if there are any issues. Also did not test remote. ### ⭐⭐⭐⭐ ZAP *by on Reviewed in the United States January 5, 2018* So far so good. I've had it about a week so far. It's driving a pair of Fluance SX6's and a 10" Polk audio powered sub. The Bluetooth works flawlessly and easily. I assume the Bluetooth has the newest tech considering how well it sounds. I've been playing 320kbps mp3s with the Bluetooth. Bluetooth seems to be mixed louder than the other inputs for some reason, but not enough to be a nuisance or anything.The "aux in" works great.The optical works great as well.I haven't used the USB out yet, buy I'll go ahead and assume that it works well too.My only complaint and the reason for the 4 stars instead of 5 is that during dry winter months, the static you build up walking on carpet can cause problems. Anytime you touch the unit without grounding yourself first, the unit will drop the audio output regardless of the input. You have to turn the unit off and then back on. Luckily it comes with a remote. I may try to ground the unit a little better myself later on, but until then I can deal with the static issue. It's probably not the best thing for the unit, but I'll consider my troubles a test.EDIT****SIX WEEKS IN, THE ZAPPING ONLY PRODUCES AN AUDIBLE POP AT A LEVEL BELOW THE LEVEL OF THE AUDIO. IN MY EYES, THIS IS AN IMPROVEMENT. I DIDNT DO ANYTHING TO IT. THERE FOR A WHILE, IF I TOUCHED ANYTHING CONNECTED TO THE AMP AND IT ZAPPED, THE AUDIO WOULD CUT. WHETHER THE TV, XBOX, OR RECORD PLAYER WAS TOUCHED. ILL BUMP MY RATING UP TO 5 IF IT LASTS LONGER THAN A YEAR.Well worth the money. Would recommend.EDIT****IF YOU THINK ITS BROKEN, CHECK TO MAKE SURE OUTPUT IS SET TO SPEAKERS AND NOT HEADPHONES. THAT'LL SPARE YOU OF ANY EMBARRASSMENT, IF YOU KNOW WHAT IM SAYING. ## Frequently Bought Together - S.M.S.L AD18 Audio HiFi Stereo Amplifier with Bluetooth 4.2 Supports Apt-X,USB DSP Full Digital Power Amplifier 2.1 Small 80Wx2 Class D Amplifier with Subwoofer Output - Micca RB42 Reference Bookshelf Speaker with 4-Inch Woofer and Silk Tweeter (Dark Walnut, Pair) - GearIT 14 AWG Speaker Cable with Banana Plugs 14Ga Banana Wire for Bi-Wire Bi-Amp HiFi Surround Sound --- ## 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.kr/products/56513326-s-m-s-l-ad18-audio-hifi-stereo-amplifier-bluetooth](https://www.desertcart.kr/products/56513326-s-m-s-l-ad18-audio-hifi-stereo-amplifier-bluetooth) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-08-18*