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SMSL PA40 Class D Power Amplifier, 165Wx2 Stereo Amplifier for Passive Speakers, with MA5332 Chip/EQ/Bass Treble Control/Built-in Power Supply

4.6 (6) Write Review
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$136.08

$ 58 .31 $58.31

In Stock
  • Up to 165Wx2 Output Power: PA40 audio amplifier use MA5332 chip, supports 165Wx2 (4Ω) and 85Wx2 (8Ω)
  • Multiple Protections: PA40 integrated overcurrent, overheating, under-voltage protections and volume overload protection
  • Built-in EQ and Treble/Bass: PA40 2 channel amp is built-in 6 different preset EQ, Treble/Bass adjustment and High Low Gain function
  • Built-in Power Supply: PA40 amp comes with built-in power supply, no need to purchase external power adapter
  • Classic Appearance & Easy Operation: SMSL PA40 adopt with classic float window exterior design. Equipped with a full-featured remote control to enhance convenience


Product Description

SMSL PA40 class d amp
SMSL PA40 power amplifier

Specifications

Input RCA
THD+N 0.004%
SNR 100dB
Channel Separation 72dB
Input Sensitivity/Impedance High gain:315mV/20kΩ; Low gain:580mV/20kΩ (Max input level in high gain: ≤1.2 VRMS.)
Output Power 165Wx2(4Ω); 85Wx2(8Ω)
Power Consumption 40W(Normal Volume)
Size 191.6x41.6x185mm(WxHxD)
Weight 1.26kg/2.77lbs
Package List 1* SMSL PA40, 1* Remote Control, 1* AC Power Cable, 1* User manual, 1* SMSL Card

  • 1. Speaker Impedance: The PA40 supports both 4Ω and 8Ω.

    2. Required power: PA40 supports output power: 165Wx2 (4Ω); 85Wx2 (8Ω).

    3. Number of channels: 2.0 channels for the PA40.

  • The SMSL PA40 amplifier requires a passive speaker to be connected in order to work. It is designed to power and drive passive speakers, enabling you to build 2.0 channel audio systems. only RCA inputs and has no built-in speakers of its own.

  • Yes, but you need to use an active subwoofer with speaker terminals, such as the yamaha NS-SW200.

  • Yes, all of the settings of PA40 are maintained after a power failure, such as volume, treble, and bass adjustments.

  • If you encounter any problems during use, AOSHIDA provides 24-hour online technical service.


DangFestus
Reviewed in the United States on May 5, 2025
Second day of listening I can tell you that Ive already got my $140 worth of enjoyment. I switched from higher end SE tube amps and Ive had no drop off in enjoyable listening at this point. I will give it some time before I make a safe evaluation and avoid false praise but the detail and texture of sound has me giddy. There is a bass and treble along with custom pre set eq settings that I am still exploring. Runs very cool to touch even after 6 hours of continuous play. At first it seemed extra bright but a -1 on the Treble setting cured that. I would like a second input without having to use a preamp or selector and the A300 gives you at for $60 more.
Mervyn Yardley
Reviewed in the United Kingdom on January 23, 2025
Not as good as the write up, also there was a humming sound coming from my speakers, i tested my speakers on another system and they were perfect, so the fault is in the unit, i know it was cheap, but in this case you do get what you payed for.
fernando
Reviewed in Spain on April 2, 2025
Muy bien empaquetado, en perfecto estado y funciona muy bien…con buen sonido y calidad construcción.
PCUser
Reviewed in France on December 27, 2024
Pas assez puissant pour haut parleur Dali Phantom K-60 LP (8 Ohm). A partir d'un certain volume le son devient déformé.
mylenetangram
Reviewed in Japan on December 19, 2024
DENON1700NEを修理に出したため、修理中の期間、試しにDO100PROと共にこのアンプを購入。電源を切るとき「ポッ」という雑音（ポップノイズ又はポップ音）がする点、スピーカープラグがややチープな点以外、音質に関してデノンアンプを十分に代行してくれたと思う。特に音量の大きな表示は、視認しやすく便利な機能。
Palaro
Reviewed in Canada on November 29, 2024
After being so impressed with the SMSL AO 300, I decided to purchase two PA40 to see how they would sound. I am using them to drive a pair of Dynaudio bookshelf as well as a pair of Dynaudio floorstander 4 ohm speakers and they all sound absolutely excellent!!!SMSL make excellent products and Aoshida-Audio are a terrific company as well :) You would not be disappointed with this purchase!