Hi guys,
I've had the opportunity to get this amp and test it, with stock 32V power supply; with original op-amps and with upgraded OP2134 op-amps. I've tested it on my three systems using Bluetooth or RCA, with different kinds of music - Rock, Pop, Electronic, R&B and Jazz. My original systems are AB class amplifiers (NAD C355BEE, Onkyo Integra 8690, NAD T742).
System 1: Focal JM Lab Chorus 714 speakers (8 Ohm, 91dB), played over Bluetooth (Tidal FLAC) and over RCA (NAD T545 CD player, SMSL SU-8 DAC), room area 18m2
System 2: Focal JM Lab Electra 906 speakers (8 Ohm, 90dB), played over Bluetooth (Tidal FLAC) and over RCA (Volumio, Raspberry PI with DAC), room area 15m2
System 3: Klipsch RB-61 (8 Ohm, 95dB) speakers over RCA with NAD T532 CD player, room area 40m2
The amp looks tiny in design, but it rocks! It has a nice sound, loud enough for normal rooms (up to 40 m2), especially with more sensitive speakers, and also with the stock 32V power supply. It has good channel separation, decent imaging, and very nice build quality. The musical details are present and it is enjoyable to listen to.
I especially like the orange volume knob - the color is very catchy and adds vividness, well done FOSI Audio! In the beginning I missed the remote, but then I've enjoyed turning it. If you want loud music, you have to crank it up to 3 o'clock, especially on Bluetooth or if the song is more soft. Bluetooth reproduction is less loud compared to RCA; on RCA I haven't cranked it above 1 to 2 o'clock, depending on the original signal level. I haven't noticed any distortions from the BT20A PRO at high levels of volume, but some of my rooms couldn't handle so much volume without distortions. One important thing also - after 3 hours of continuous listening on very high volume, the BT20A PRO was barely warm, so it can handle continuous high load without problems.
The op-amp upgrade brings improvement in sound quality and I recommend it, especially because it is easy to upgrade it. The bluetooth connection works extremely fast and reliable.
Conclusion: Very nice sounding amp, high value for money, clear recommendation!
What are your opinions and experiences with similar class-D amps?
KR
h.
I've had the opportunity to get this amp and test it, with stock 32V power supply; with original op-amps and with upgraded OP2134 op-amps. I've tested it on my three systems using Bluetooth or RCA, with different kinds of music - Rock, Pop, Electronic, R&B and Jazz. My original systems are AB class amplifiers (NAD C355BEE, Onkyo Integra 8690, NAD T742).
System 1: Focal JM Lab Chorus 714 speakers (8 Ohm, 91dB), played over Bluetooth (Tidal FLAC) and over RCA (NAD T545 CD player, SMSL SU-8 DAC), room area 18m2
System 2: Focal JM Lab Electra 906 speakers (8 Ohm, 90dB), played over Bluetooth (Tidal FLAC) and over RCA (Volumio, Raspberry PI with DAC), room area 15m2
System 3: Klipsch RB-61 (8 Ohm, 95dB) speakers over RCA with NAD T532 CD player, room area 40m2
The amp looks tiny in design, but it rocks! It has a nice sound, loud enough for normal rooms (up to 40 m2), especially with more sensitive speakers, and also with the stock 32V power supply. It has good channel separation, decent imaging, and very nice build quality. The musical details are present and it is enjoyable to listen to.
I especially like the orange volume knob - the color is very catchy and adds vividness, well done FOSI Audio! In the beginning I missed the remote, but then I've enjoyed turning it. If you want loud music, you have to crank it up to 3 o'clock, especially on Bluetooth or if the song is more soft. Bluetooth reproduction is less loud compared to RCA; on RCA I haven't cranked it above 1 to 2 o'clock, depending on the original signal level. I haven't noticed any distortions from the BT20A PRO at high levels of volume, but some of my rooms couldn't handle so much volume without distortions. One important thing also - after 3 hours of continuous listening on very high volume, the BT20A PRO was barely warm, so it can handle continuous high load without problems.
The op-amp upgrade brings improvement in sound quality and I recommend it, especially because it is easy to upgrade it. The bluetooth connection works extremely fast and reliable.
Conclusion: Very nice sounding amp, high value for money, clear recommendation!
What are your opinions and experiences with similar class-D amps?
KR
h.
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Hey guys, new to the forum and new to the BT20A PRO.
I'm wondering i have just installed the amp and love the functionallity. But the sound seems to be a bit muddy, i was using a Denon DRA 565rd before. i think im missing a bit in the mid.
Would upgrading to OP2134 op-amps remedie this?
I'm interested to hear what your thought are one the different chips.
Thanks!
I'm wondering i have just installed the amp and love the functionallity. But the sound seems to be a bit muddy, i was using a Denon DRA 565rd before. i think im missing a bit in the mid.
Would upgrading to OP2134 op-amps remedie this?
I'm interested to hear what your thought are one the different chips.
Thanks!
Well if you skip trough the timeline to avoid the anouncemets, and i can hear a clear difference between the tested op-amps. I'm going to test some other op-amps, but i'm considering returning the unit... i don't understand how people are so enthusiastic about it. The difference between the line and BT is putting me off aswell..
I was listening to this YT clip from beginning to the end. I was again disappointed with the sound from YouTube, it's far from the quality level I'm longing for; hence I didn't judge this amp based on this clip.
I'm curious what will then the next pair of opamps bring; after receiving and testing them on BT20A PRO, I'll post my impressions on the forum.
As I'm pretty satisfied with the BT20 PRO (sound, practicality), I'm considering to get the P3 and what the (tube) sound would bring...
I'm curious what will then the next pair of opamps bring; after receiving and testing them on BT20A PRO, I'll post my impressions on the forum.
As I'm pretty satisfied with the BT20 PRO (sound, practicality), I'm considering to get the P3 and what the (tube) sound would bring...
This unit also measured well in an ASR review: https://www.audiosciencereview.com/.../fosi-audio-bt20a-pro-amplifier-review.43751/. The Bluetooth doesn't support Aptx-HD or LDAC so I wouldn't expect it to sound nearly as good as the line-in. No surprise there. But for $100 it looks like a solid amp.