SMSL PA400 Stereo / Mono Amplifier
€ 549,00 Incl. Vat
✅ 2 years standard warranty
✅ Free return within 14 days
✅ Orders before 17:00 → shipped today
❌ Out of stock
Out of stock|Delivery time: at this moment no date available yet
Email when stock available
The SMSL PA400 is an innovative amplifier that uses Gallium Nitride (GaN) transistors to deliver 2x250W amplification at 4Ω. Its versatility also allows it to operate in pure mono mode, delivering an impressive 500W at 8Ω. Each component of the PA400 has been meticulously selected to achieve exceptional audio performance, with an incredibly low harmonic distortion rate of 0.0003% and a signal-to-noise ratio of 115dB.
SMSL PA400: GaN transistors amplification
The PA400 uses GaN FET transistors for its amplification stage. These transistors offer significantly higher efficiency than traditional silicon transistors, minimising energy losses during switching and thus reducing heat generation. In addition, GaN transistors are distinguished by their extremely high switching speed, in the order of 1MHz. This increased speed has several notable advantages: it eliminates switching noise in the circuits, significantly reducing background noise, and it allows for much faster response times, instantly adapting to variations in power demand for greatly improved audio dynamics.
SMSL PA400: Optimised power supply
The PA400 incorporates a switching power supply stage specially designed for demanding audio applications. This power supply is capable of delivering considerable power while maintaining perfectly silent operation. For added safety, the PA400 is equipped with overheating and overpower protection circuits.
SMSL PA400: Gold-plated output connectors
The PA400’s output connectors are gold-plated to effectively protect them from oxidation and corrosion, while ensuring excellent electrical conductivity for optimal, loss-free audio signal transmission.
| Specifications | |
|---|---|
| Product type | Integrated amplifier |
| Amplification componant | Infineon GaN FET transistors |
| Inputs | 1x Single-ended stereo RCA 1x Balanced stereo XLR 1x Mono XLR |
| Output | Speaker terminal |
| Total harmonic distortion more noise (THD+N) | 0.003% |
| Signal-to-noise ratio (SNR) | 115dB |
| Channel separation | 75dB |
| Input sensitivity | RCA stéréo : 0.96Vrms/22kΩ XLR stéréo : 2.1Vrms/22kΩ XLR mono : 2.7Vrms/22kΩ |
| Stereo output power | 2x 250Wrms @ 4Ω 2x 200Wrms @ 8Ω |
| Mono output power | 1x 500Wrms @ 8Ω |
| Volume control chip | PGA2311 |
| General | |
|---|---|
| Power supply | 100-240V AC |
| Energy consumption | Standby : < 0.5W In use : 40W |
| Dimensions | 254 x 47.7 x 242mm |
| Weight | 2.58kg |
| Color | White |
| Package | 1x SMSL PA400 1x Remote control 1x Power cable |
Shipping - Made easy with DPD, DHL and your National shipping company
We deliver your Hifimastery order as quickly as possible via DPD, DHL, or PostNL (your country’s national postal service). You choose your preferred carrier at checkout. All shipments are insured and tracked, so we handle any loss or damage.
Shipping Costs:
- Netherlands & Belgium: Free shipping on orders over €50;
- Other European countries: Free shipping on orders over €100–€200 (depending on country, always visible in checkout before payment).
The higher the order amount the lower the shipping costs until the free shipping amount is reached, which is fair...
Order Shipping Times:
- Orders placed before 17:00h and in stock ship the same day monday-friday;
- In case a product has a longer delivery time than this is mentioned at the stock status!!!
You choose we follow:
You can choose in the checkout what shipping company you want us to use for shipping your order. Sometimes due to longer delivery times etc, we can choose another reliable partner based on your order.
Track & Trace
We know you’re eager to enjoy your order—and we completely understand! Once your order has been shipped via an external carrier, you’ll receive an email from us containing a tracking number or a direct link to the carrier’s tracking page. This lets you see exactly when your order is expected to arrive.
If your order is delivered to a pickup point due to your absence, you’ll be notified either through the tracking information or via services provided by the carrier.
Returns & Right of withdrawal – We keep it simple
Not satisfied with your purchase? No worries! Returning items is simple and stress-free.
✨ Key Highlights:
- No reason needed – return “just because”
- 14-day reflection period – from delivery date and within 14 days later you can decide to keep it or not...
- Fast inspection – returns inspected within a few days most of time 5 days (max 14);
- refund will be done mostly same day after inspection is done.
Return Conditions:
Items are undamaged and clean.
- All accessories included (also manual etc);
- Original packaging;
- Pack items securely for safe return;
- Sealed products remain unopened (applies to fragile or hygiene-sensitive items, e.g., turntable styli, in-ear earbuds).
For furniture, always choose Option 2.
Option 1 – Return Label:
- Use our return portal to print a return DPD shippinglabel;
- Coverage is up to €500 via DPD (other carriers not insured);
- Returns are at the customer’s risk and expense (if you need more insurance value contact us so we can check for higher insurance or choose option 2)
Option 2 – Own Carrier:
- Arrange return with a carrier of your choice;
- Email us: “Return: order number …” to receive a return form to include in your package;
- Return requested more than 2 weeks after delivery day cannot be processed and declined.
Timeframe:
- You have 14 days to request a return calculated from the day the package was delivered to you;
- The package must be received in our warehouse within 2 weeks after your request to return the product.
Exchange product:
- Place a new order for the desired product;
- Original order must be returned and will be refunded (minus any return costs);
- Refunds processed via the original payment method within 2 weeks.
