SMSL PA400 Gallium Nitride Power Amplifier
SKU: 78975984473

SMSL PA400 Gallium Nitride Power Amplifier

Sale price$249.75 Regular price$277.50
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Description

SMSL PA400 Gallium Nitride Power AmplifierFeatures: >High End Power Amplifier. >Latest Gallium Nitride Power Transistors(GaN). >Works in Stereo as well as Mono Block Modes. >Aerospace Grade Aluminium Alloy Chassis. >XLR and RCA Inputs. >Gold Plated Input and Output Terminals. >Exquisite Design with Ventilated Side Panels. >Top Quality Components. >Overheating and Overcurrent Protection. >Dedicated Audio Switching Power Supply. >Clean Sound Amplification with 0. 003% Ultra Low Distortion.

Features:-

>High-End Power Amplifier.

>Latest Gallium Nitride Power Transistors(GaN).

>Works in Stereo as well as Mono Block Modes.

>Aerospace-Grade Aluminium Alloy Chassis.

>XLR and RCA Inputs.

>Gold-Plated Input and Output Terminals.

>Exquisite Design with Ventilated Side Panels.

>Top-Quality Components.

>Overheating and Overcurrent Protection.

>Dedicated Audio Switching Power Supply.

>Clean Sound Amplification with 0.003% Ultra-Low Distortion.

>Output Power: 250W(Stereo Mode), 500W(Mono Mode).

>Power Consumption: 40W.

>Size: 254x47.7x242mm.

>Weight: Approx 2.58Kg/5.69lbs.

SMSL PA400 is a brand new Class D power amplifier based on the high-performance Gallium-Nitride(GaN) technology. It is designed using high-quality Infineon Gallium Nitride(GaN) transistors. They operate at an ultra-high switching frequency of 1MHz to redefine the sound quality across the entire frequency band. It also features Ti’s flagship PGA2311 volume chipset for precise volume control. SMSL PA400 is designed for audiophiles who seek pristine sonic excellence, immense control, and high-efficiency performance. It packs a solid punch with a rated power of about 250W per channel in stereo mode(4Ω load), and 500W output in mono block mode(8Ω load). Treat your passive speakers with the all-new SMSL PA400 and experience outstanding sound with remarkably low distortion and supreme transient response.

Next-Generation Performance with GaN Transistors:-

SMSL PA400 is a true next-generation Power Amplifier designed for high-performance speakers. It features German Infineon’s GaN FET architecture, which ensures studio-grade sound with unmatched clarity. These GaN Power transistors operate at an ultra-high switching frequency of 1MHz to redefine the sound quality across the entire frequency band.

Pure Power Redefined:-

SMSL PA400 is a supremely powerful device that packs strong output thrust with an ultra-low THD+N of 0.003% and a SNR of 115dB. With the help of Ti PGA2311's precise volume control, the PA400 achieves pure high-fidelity audio with excellent channel separation. With clean and powerful output, the PA400 ensures deep, stable sound performance with excellent imaging and clean, distortion-free output even at high volume levels.

Stereo and Mono Block Operation, High-Power Output Thrust:-

SMSL PA400 can be used in two operating modes: Stereo mode, where it produces 250W per channel output at 4Ω impedance load, or you can use two PA400s stacked together in mono block mode for high-power requiring speakers. In Mono block mode, the PA400 achieves a maximum output power of 500W at an 8Ω impedance load. With such a strong output, low distortion, the PA400 is the perfect companion for your speakers!!

Refined Design, Protected Audio Circuit:-

SMSL has designed the PA400 in a sleek aluminum alloy chassis with gold-plated connectors. It’s not just durable, but also elegant and classy in its design. We also have a custom-developed high-power switching power supply that ensures stable power delivered to each component on the audio circuitry. It has overcurrent and overheat protection that protects the audio circuitry and ensures reliable performance for long listening sessions.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78975984473

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4.1 ★★★★★
Based on 2424 reviews
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Verified Purchase
Megan
Houston, US
★★★★★ 5
Wonderful!
Size: Standard/Queen (Pack of 1), Style: High Loft (6"-7")
I ordered the loftier version of the pillow and I love it! I'm a side sleeper and I've been having pillow issues over the last few years where I swear every pillow is either too tall, too thin, too soft to provide support, to firm and hurts my ears, or the stuffing is too slick or something and migrates away from wherever I put my head. It's been... A time. But this pillow has been wonderful! I've been using it for a couple weeks now and it's the perfect height for me! The latex inner chamber provides some much needed support, but the softer outer chamber gives me enough cushion to keep my ears from aching. I will say that, while this is the perfect height for me, personally, I think that if you're someone who prefers a pretty lofty pillow, that this might not be tall enough for you. I ordered the taller version, and it feels right for me, but I've noticed in my pillow buying extravaganza that even pillows that everyone else loves that are designed for side sleepers are usually just too tall for me. So if this pillow is right for me, and you prefer a pretty lofty pillow, I really bet that this won't be tall enough in that case. It's definitely more of a medium loft, rather than a very high loft
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 20, 2024
E
Verified Purchase
Erin Allen
Cuba, US
★★★★★ 5
Read this review. This pillow saved me.
Size: Standard/Queen (Pack of 1), Style: High Loft (6"-7")
I have to testify about this pillow, my brothers and sisters. Ever since I hit my 30s, my body has gone down. Aches and pains. Pops. Crackles. Snaps. It’s ridiculous. Over the last 2 years, I have managed to injure a muscle in my shoulder and the pain is unbearable when it is inflamed. I finally narrowed it down to the pillow I was sleeping on. I have an attachment to a pillow I’ve owned for over 20 years - that’s another story. I could fold it 3 times and it was finally thick enough to support my head. My shoulder got so tore up recently that I had to go through 2 rounds of steroids plus round the clock ibuprofen. Waking up in the night, the whole ordeal. I ordered this pillow after much research all over the internet. I was appalled by the $165 price ticket. But when you’re in that level of pain, you’re just about willing to do whatever it takes. The first night I immediately noticed I got more consecutive hours of sleep than I had in weeks. A week later and my shoulder is pain free. I could’ve cried. The height of this pillow stabilizes my neck and shoulders perfectly. It is firm, but gives and contours to your neck and head. It’s a heavy pillow but I don’t even care. Truly I don’t think I’ll ever go back. This pillow has saved my shoulder and I’ll never stop thanking God for it. If you’re experiencing back, shoulder, or neck pain and are considering this pillow, just order it. Please. Just do it. I’m forever changed. But I’m still keeping 20 year old pillow… just for sentimental purposes. 😂
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Reviewed in the United States on September 3, 2025
J
Verified Purchase
Jacky Liu
Phoenix, US
★★★★★ 5
Really good pillows
Number of Items: 1, Number of Items: 1
I’ve been using this pillow for a while now and it’s honestly one of the most comfortable pillows I’ve tried. It has a soft, cloud-like feel but still gives enough support for my neck and shoulders. I’m a side sleeper and it keeps its shape well through the night. The material feels high quality, and it doesn’t go flat like cheaper pillows. Definitely improved my sleep quality and worth the purchase.
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Reviewed in the United States on May 12, 2026
D
Verified Purchase
DPLK
Belleville, US
★★★★★ 5
Soft AND supportive
Number of Items: 1
I knew I needed a very soft pillow - all the foam pillows I had bought recently to try to upgrade our home pilllow selection seemed ok to the touch but were still too firm once I tried them out, but recently I also had some neck pain that needed some gentle support and the old old foam pillow I had that was so very soft was losing its supportive qualities and the pain wasn’t getting better. This one seemed by description to fit the bill- very soft by the company’s own definition but also with support. I’m happy to report this is exactly as advertised- the softest foam pillow I’ve tried out of the box but also good support. Pain has improved since I started using this pillow. I would buy more if we need more pillows, it’s perfect for me and I think would be comfortable for most people. I think you just need to figure out how firm you need your pillow and also height preference . I’m an all over sleeper -back, side, even belly sometimes, so it’s fine for me, but it is a little taller compared to other pillows I’ve bought recently. I didn’t compare/try other prominent pillow brands, mostly my experience is Ikea (my daughter uses a very flat and nice foam pillow from them that is even a little pricier than this one and it works well for her), and whatever brands happen to be available at target and Costco. This price point for a name brand is reasonable, I think; I was looking at other brands way over $100, and I was willing to spend that much for something that would work long term, so this one working was great. Also, this definitely does not have any cooling effect technology, which is fine by me, but something to consider if you do like cool pillows. (Although, PSA: I recently had to throw away older foam pillows that had those cooling gel panels because the gel panels started disintegrating into sticky ooze; gross and had to throw away whole pillow because couldn’t dissociate from rest of the pillow. Sad cuz the foam part of those pillows were fine.) Anyway, if you like softer pillows but want good support, this one works well and is worth trying!!
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Reviewed in the United States on May 30, 2025
L
Verified Purchase
Lori Wornom
Natrona Heights, US
★★★★★ 4
Flatter than a regular pillow but nice and soft
Number of Items: 1
Is it softer than a typical memory foam pillow? Yes. But it’s also a lot flatter. I don’t find this pillow rebounds very well. It’s good for stomach sleepers but not so much for side sleepers. I’m a 2/3 of the night side sleeper so it’s unfortunately not my magic pillow.
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Reviewed in the United States on February 11, 2026

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