• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). There are daily reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

New SMSL A300 BTL Class-d Power Amp

SMSL-Mandy

Active Member
Manufacturer
Joined
Aug 31, 2018
Messages
283
Likes
630

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

Member
Joined
Mar 12, 2022
Messages
7
Likes
11
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

Member
Joined
Feb 17, 2021
Messages
44
Likes
31
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:

TimW

Addicted to Fun and Learning
Joined
Aug 15, 2018
Messages
822
Likes
1,073
Location
Martha Lake, WA
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.
 

JohnG

Member
Joined
Dec 24, 2019
Messages
44
Likes
44
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

Member
Forum Donor
Joined
Apr 25, 2022
Messages
50
Likes
21
Location
Pfungstadt
Same modes as Sabaj a20a and same infenion chip I think.
 
  • Like
Reactions: mx2

robertospeed

Active Member
Joined
Mar 29, 2020
Messages
190
Likes
154
Location
Italia
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
 

Snoopy

Addicted to Fun and Learning
Joined
Jul 19, 2021
Messages
735
Likes
407
No balanced inputs?

Would be a nice Match to my D300.


Is there a matching headphone amplifier already?
 

Astoneroad

Senior Member
Forum Donor
Joined
Feb 16, 2022
Messages
357
Likes
657
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.
 

Snoopy

Addicted to Fun and Learning
Joined
Jul 19, 2021
Messages
735
Likes
407
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.
Yeah that works. But BT is about 1/3 of cd quality
 

Astoneroad

Senior Member
Forum Donor
Joined
Feb 16, 2022
Messages
357
Likes
657

Matias

Major Contributor
Forum Donor
Joined
Jan 1, 2019
Messages
3,435
Likes
6,429
Location
São Paulo, Brazil

mdsimon2

Major Contributor
Forum Donor
Joined
Oct 20, 2020
Messages
1,547
Likes
1,938
Location
Detroit, MI
What is the source of this graph, where did you get it from please?


Michael
 

muslhead

Major Contributor
Forum Donor
Joined
May 28, 2020
Messages
1,151
Likes
1,129
if you were to buy two and use as mono's, how would you control volume to insure = output?
 

Berwhale

Major Contributor
Forum Donor
Joined
Aug 29, 2019
Messages
2,634
Likes
3,134
Location
UK
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

Major Contributor
Forum Donor
Joined
May 28, 2020
Messages
1,151
Likes
1,129
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

Major Contributor
Forum Donor
Joined
Aug 29, 2019
Messages
2,634
Likes
3,134
Location
UK
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.
 
Top Bottom