New SMSL A300 BTL Class-d Power Amp

[Toku]

The USB input of the A300 is a simple one that uses the BT module D/A conversion function and is fixed at 48kHz/16bit only.
The sound quality is not very good because the bass is weak. Think of it as a complete bonus feature.
Also, if you shut down the PC with the USB connected to the PC, there will be no response for 30 seconds or more, and then it will shut down.
This is the same behavior as the AO200.

 

[TonyJZX]

I think I'll wait for Amir to bench this one. The trump card is the power obviously. You really need to see the std. noise floor, the resolution (how HIGH is "HIGH RES"???)... I question the filler stuff like half assed BT but I suppose that whats the kiddies want.

Also the manual does say it has USB in... but since it only has type A source and its still going thru some stop gap 16/48 dacs then why bother...

The mono bloc mode is kind of half assed to... going by the manual.

But yeah... I mean if this truly is as powerful and clean as its supposed to be then this is just the start of digital amps using Infineon that are literally 2 to 3 pounds of very high power.

Now going by the IWI review you expect the same kind of lean dry etchy class d 'feel' you always get.

 

[robertospeed]

 

[ca1075]

Nice set up!

 

[ca1075]

N

View attachment 219751

Nice set up!

 

[robertospeed]

Nice set up!

I'm looking for some solution with bookshelf speakers + pedestals + active subwoofer, because my listening is based closely, with floor speakers to listen to them well I have to stay away.

 

[Kitarist]

Iwi review says its even better than Topping PA5 and fuller sounding so it might be worth a try

 

[ca1075]

No brainer for the price.

 

[Kitarist]

Anyone knows if any EU shops already have it in stock? Please post a link

Thanks

 

[Zek]

Anyone knows if any EU shops already have it in stock? Please post a link

SMSL a300 digitale eindversterker BTL-modus Hi-Res Bluetooth 5.0 met afstandsbediening met 165 Wx2 (4Ω)/85Wx2(8Ω) voor de passieve luidspreker thuis buitenshuis/actieve bassubwoofers (zwart) : Amazon.nl: Elektronica

SMSL a300 digitale eindversterker BTL-modus Hi-Res Bluetooth 5.0 met afstandsbediening met 165 Wx2 (4Ω)/85Wx2(8Ω) voor de passieve luidspreker thuis buitenshuis/actieve bassubwoofers (zwart) : Amazon.nl: Elektronica

www.amazon.nl

SMSL A300 Class D Amplifier Infineon MA5332MS USB Bluetooth 5.0 Subwoofer 2x160W 4 Ohm - Audiophonics

SMSL offers with the A300 a compact but powerful and efficient Class D amplifier, based on a Infineon MA5332MS amplifier chip. These allow it to deliver a comfortable power of 2x160W...

www.audiophonics.fr

 

[longma]

It is $150 again on US Amazon. It is sold directly from SMSL. However, the delivery date push to August-September.

 

[maty]

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

SMSL A300 Hi-res Power Amplifier 165W*2 BTL Mode Bluetooth 5.0 Support Passive Speakers & Active Subwoofers With Remote Control 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...

hifi-express.com

 

[longma]

Iwi review says its even better than Topping PA5 and fuller sounding so it might be worth a try

I just wonder it is because it has more power.

 

[longma]

No brainer for the price.

For $150 on sale on Amazon, or even full price, cannot agree more. It has enough power to drive almost any box speakers. It can be BTL if need more power. It is an integrated amp. It has sub out. It has buildin tone controlled. It has internal power supply ...

 

[nsfgp]

Anyone who has both a PA3S and this SMSL A300 (I know at least a couple folks here does).
Can you confirm how is the noise floor level of this A300?? Mine has quite higher noise floor/Tweeter hiss level compared to my PA3S. Not to the point that bothers me but wants to confirm. Probably by design to get more gain/power VS the much reduced gain/power of the PA3S by design making it super quiet.

Anyone has an internal pic of this A300 too?? Any output choke/filter inside?? I have a feeling this thing may not measure too well (similar to the issue of those output choke-less Infineon amp like the A100, etc.)

 

[Toku]

Anyone who has both a PA3S and this SMSL A300 (I know at least a couple folks here does).
Can you confirm how is the noise floor level of this A300?? Mine has quite higher noise floor/Tweeter hiss level compared to my PA3S. Not to the point that bothers me but wants to confirm. Probably by design to get more gain/power VS the much reduced gain/power of the PA3S by design making it super quiet.

Anyone has an internal pic of this A300 too?? Any output choke/filter inside?? I have a feeling this thing may not measure too well (similar to the issue of those output choke-less Infineon amp like the A100, etc.)

How you feel the noise floor level depends greatly on the efficiency of the speakers you are using. Noise may be noticeable with high-efficiency speakers that greatly exceed 90 dB.
The PA3s and A300 use the same Infineon IC chip, but when comparing the data sheets of the MA12070 and MA5332MS, the noise floor level of the MA5332MS is higher.
I use homemade speakers and Quad S-2, but the A300 has a slightly higher noise level. But if you are 20 cm away from the speaker, you can't hear anything.

Inside photo

New SMSL A300 BTL Class-d Power Amp

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. i am surprised they even have a manual in the first place so i guess that is progress. I went ahead an ordered...

www.audiosciencereview.com

 

[nsfgp]

@Toku thanks for the reply. Yes understand it is speaker dependent. I rotate between 3 pairs of speakers as well and each pair has different noise floor level when using the same partnering gears.

 

[maty]

Infineon MA533MS

[PDF] https://www.infineon.com/dgdl/Infin...N.pdf?fileId=5546d4627a0b0c7b017a3f402ad026a2

Residual noise (AES-17, IHF-A, typical) - 250 μVrms

 

[maty]

Infineon MA12070

45µV output integrated noise (A-w)

[PDF]

https://www.infineon.com/dgdl/Infineon-MA12070-DS-v01_00-EN.pdf?fileId=5546d46264a8de7e0164b750002861a5

[PDF]

 

[maty]

The "old" IRS2092

[PDF] https://www.infineon.com/dgdl/irs2092.pdf?fileId=5546d462533600a401535675f1be2790