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Fosi Audio BT20A Pro - Opinions and Comparisons
- Thread starter Jeromeof
- Start date
Kimbrough Xu
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- May 18, 2022
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Whats a hotter power supply?
Clmrt
Member
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- Feb 26, 2023
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Higher voltage vs stock. Hard to figure out exactly which one it would be.
Kimbrough Xu
Active Member
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- May 18, 2022
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Just go to the fosi website.
JSmith
Master Contributor
I was going to buy the BT20A Pro, but I really wanted something simpler with no Bluetooth at all. So I ended up backing the new Fosi V3 instead.
www.audiosciencereview.com
Fosi Audio V3 amplifier discussion
Fosi Audio is releasing their new V3 amp. The model name is a bit confusing but oh well. Functionality it is like the Aiyima A07. Amp with RCA in, sub out, volume and power switch. Nothing else to distract you. I am not sure why it is on Kickstarter to launch, but I backed it since I was...
www.audiosciencereview.com
dridel
Member
I replaced a BT20A with the new BT20A PRO for my ceiling speakers. I have an Apple TV connected via bluetooth to watch movies and listen to music. There are so many upgrades including the wattage that's it's hard to tell exactly what accounts for the big jump in sound quality, but I'm very happy I upgraded! It's not a MA352 (I did compare it haha) but for $70 (thanks for the 30% discount Fosi!) I could not be happier. Now let's see how much I can get for the BT20A...
OP
- Thread Starter
- #49
It will be interesting to see what the V3 measures liked but Fosi have been getting better and better so no doubt its a good Amp, but I do like my BT20A Pro - bluetooth is effectively optional so I don't think affects the sound quality though I run with the RCA inputs from a DAC.I was going to buy the BT20A Pro, but I really wanted something simpler with no Bluetooth at all. So I ended up backing the new Fosi V3 instead.
Fosi Audio V3 amplifier discussion
Fosi Audio is releasing their new V3 amp. The model name is a bit confusing but oh well. Functionality it is like the Aiyima A07. Amp with RCA in, sub out, volume and power switch. Nothing else to distract you. I am not sure why it is on Kickstarter to launch, but I backed it since I was...
Kimbrough Xu
Active Member
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- May 18, 2022
- Messages
- 289
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- 137
Are they comparable? Since Fosi BT20A PRO is $70 and mcintosh MA352 is $7000, they're not even the same thing.
I wish I could get the 30% discount! You went from a TPA3116 chip to TPA3255 chip.
dridel
Member
Technically speaking, they were comparable. I compared them myself
But no, different league, especially with my power hungry B&W 702 Signatures. But, not 100 times better!
maty
Major Contributor
Technically speaking, they were comparable. I compared them myself
[ B&W's sensitivity was a high 90.2dB(B)/2.83V/m, confirming the specified 90dB. The 702 S2's nominal impedance is specified as 8 ohms, with a minimum value of 3.1 ohms. ]
And about 3.4 Ohms at... 700 Hz!!!!!!!
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dridel
Member
Is that good or bad? I'm no audio engineer...
[ B&W's sensitivity was a high 90.2dB(B)/2.83V/m, confirming the specified 90dB. The 702 S2's nominal impedance is specified as 8 ohms, with a minimum value of 3.1 ohms. ]
And about 3.4 Ohms at... 700 Hz!!!!!!!
Mine are 702 Signature not S2.
https://www.whathifi.com/reviews/bowers-and-wilkins-702-signature
702 Signature Tower Speakers | Bowers & Wilkins
The 702 Signature tower speaker features optimized crossovers, three Aerofoil Profile bass drivers, a Continuum cone midrange, and a Carbon Dome tweeter.
maty
Major Contributor
Worst impedance graph (3.1 and 3.3 Ohms) -> they need a good amplifier with amperes to sound good with discrete transistors, without chipamps (either class D or AB, or at least two by channel). Or a powerful tube amp.
And...
A cheap class D is not a good idea. Or a modern AV.
And...
A cheap class D is not a good idea. Or a modern AV.
LuckyLyndy
Member
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- Apr 27, 2023
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On the US Amazon page, it says 220 V in the specs. Is this a typo? I wouldn't want that in the USA.
https://www.amazon.com/gp/product/B07JVFY27T/ref=ox_sc_act_title_2?smid=ATV3LXZ3ZXOW8&psc=1
https://www.amazon.com/gp/product/B07JVFY27T/ref=ox_sc_act_title_2?smid=ATV3LXZ3ZXOW8&psc=1
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Thank you for reminding, It's the power supply that supports 110V -240V.
dridel
Member
When I first got them (used for $5K) I found them even worse than my 683s. I was driving them with a MA252. I then read they need a LOT of power so I upgraded to a MA352 (sold my year old MA252 for $100 less than I paid for new!
I went with the latter. Based on my subjective perceptions only. Then I added a REL S5 SHO. Still very happy 2 years later, although I hope to one day have the opportunity to compare to a pair of well-measuring Genelecs or Neumanns.
This bt20a pro with 32V 5A power brick should power 4 micca m-8c ceiling speakers, wired to present a 2x4ohm load, in a smallish room at casual listening volume just fine right?
My wife wants her cheap bt mono speaker upgraded for her yoga practices...
My wife wants her cheap bt mono speaker upgraded for her yoga practices...
I just ordered one with their 48V power supply from AliEx and found a pair of genuine BB OPA2134PA's from Amazon for rolling. Has anyone here done similar upgrades with theirs? I plan on hooking up a pair of JBL Stage A130's and maybe a small sub to round things out.