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New SMSL A300 BTL Class-d Power Amp

SMSL-Mandy

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SMSL A300 Hi-res Power Amplifier 165W*2 BTL Mode Bluetooth 5.0​


This is the new power amplifier

  • Input:RCA,BT,USB
  • THD+N:0.004%
  • SNR:103dB
  • ChanneL separation:85dB
  • Cutoff frequency (in high pass mode):50Hz
  • Input Sensitivity / Input Impedance:28OmV/22kΩ
  • Output Power:
  • Input:RCA,BT,USB
  • THD+N:0.004%
  • SNR:103dB
  • ChanneL separation:85dB
  • Cutoff frequency (in high pass mode):50Hz
  • Input Sensitivity / Input Impedance:28OmV/22kΩ
  • Output Power:
    • Stereo 165Wx2(4Ω) / 85Wx2(8Ω)
      BTL 330Wx1(4-8Ω)
  • Power consumption:40W(normaL voLume)
  • Size:210.5X41X198mm(WxHxD)
  • Weight 1.3kg / 2.86Lbs
  • Power consumption:40W(normaL voLume)
  • Size:210.5X41X198mm(WxHxD)
  • Weight 1.3kg / 2.86Lbs
Click for more Pics: https://hifi-express.com/products/smsl-a300-hi-res-power-amplifier
  • Hi-res AUDIO certification
  • Germany’s Infineon’s new digitaL high-power ampLifier chip
  • Japan’s NJRC company electronic voLume control chip NJW1194
  • BTL Mode(Bridgetie load) 165W*2
Greater power! It can be Bridgetie load into a single-channel amplifier with higher power to drive a large speaker!
Can form a 2.1 audio system
  1. The built-in high-pass fiLter circuit can fiLter out the subwoofer, drive the main speaker, and cooperate with the subwoofer to form a 2.1 system.
  2. Equipped with subwoofer signal pre-output, it is convenient to connect active subwoofers to form a 2.1 system.
  • Bluetooth 5.0
  • SMSL 5DB patented sound effects
  • Can form a 2.1 system
  • Audiophile Audio Components
  • High-quality dedicated switching power suppLy
  • Newly designed remote control
 
Last edited:

Eric.D

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Hello Mandy, would you be able to clarify please at what % of THD+N is this figure... @1% or 0.1% etc.?


JSmith
Looks like it's between 3-5%

Sb065e3351eb343b6aba629ea5e1554b14.jpg
 

H-RYCAJ

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If you get two units, you could run a 2.2 system for little to no money. BTL mode states 330Wx1(4-8Ω). What is the load for 4 and 8 ohms, respectively?

Edit: Sub out is fixed to 100Hz and below?
High pass is fixed at 50hz, or is this a mode that can be enabled/disabled?
Manual?
 
Last edited:

Rottmannash

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This is an integrated amplifier, not a power amplifier.
Then why do they call it:

SMSL A300 Hi-res Power Amplifier 165W*2 BTL Mode Bluetooth 5.0​

 

TimW

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Then why do they call it:

SMSL A300 Hi-res Power Amplifier 165W*2 BTL Mode Bluetooth 5.0​

I am contesting their description.

A typical power amplifier such as the Benchmark AHB2 has one set of inputs, one set of outputs, and a power switch. That's all a power amp needs to have, but sometimes they also include things like trigger input, gain settings, VU meters, loop outputs, A/B speaker selection, etc.

When an amplifier has multiple inputs, volume, a remote, tone controls and crossovers it is not a power amplifier in my book. It is an integrated amplifier. Add a tuner and it would become a receiver.
 

JohnnyNG

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If you get two units, you could run a 2.2 system for little to no money. BTL mode states 330Wx1(4-8Ω). What is the load for 4 and 8 ohms, respectively?

Edit: Sub out is fixed to 100Hz and below?
High pass is fixed at 50hz, or is this a mode that can be enabled/disabled?
Manual?
I love that the feature is included but it would seem strange to have LP fixed at 100Hz and HP fixed at 50Hz. From what I can tell in the manual, HP can be defeated but not adjusted.

What are the slopes?

A300.JPG
 

TjindarSingh

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Same modes as Sabaj a20a and same infenion chip I think.
 
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robertospeed

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I currently have an SMSL AO200 and I like it very much, I would really like to try this SMSL A300 and maybe do a nice review on my youtube channel too, I'm waiting for it to be sold on Amazon Italy
 

Astoneroad

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Forgive the ignorance of this question, with the amp being BT enabled, do I need a separate streamer or could I stream from my phone or PC directly to the amp? Thanks in advance.
 

Matias

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mdsimon2

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What is the source of this graph, where did you get it from please?


Michael
 

muslhead

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if you were to buy two and use as mono's, how would you control volume to insure = output?
 

Berwhale

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if you were to buy two and use as mono's, how would you control volume to insure = output?

It looks like the 1st A300 drives the left speaker and passes the right channel of the input signal out the BTL-R RCA connection which would then be connected to one of the left inputs on the 2nd A300. I would presume that the volume control on the 1st A300 controls the level of the BTL-R output and therefore the volume of the 2nd A300, although it doesn't state this in the manual...

1654728038217.png
 

muslhead

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that would be nice to think they had an answer to this since they are clearly advertising btl capability. Another answer i guess would be to put a dac with volume control in front of it in the chain
 

Berwhale

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that would be nice to think they had an answer to this since they are clearly advertising btl capability. Another answer i guess would be to put a dac with volume control in front of it in the chain

The A300 has a USB DAC and Bluetooth inputs, however, the manual doesn't mention if these inputs can be used in BTL mode or if their right channel is passed out the BTL-R connection.
 
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