will try to find.
Where have they published it?
Bottom of this page:
HD Audio Power Amplifier-LEVEL_1_parameters
Amplifier New Level, Philippe Sound Horizon 1 LEVEL_1
www.fiio.com
will try to find.
Where have they published it?
www.fiio.com
It looks unsightly.
What is the point of a bright red amplifier that is completely obscured by a massive black heatsink?
You can simply use a 36V 5A power supply. This is quite sufficient for this small desktop amplifier.I don't give a damn.
Besides, it's a high-quality heat sink, and I can fully indulge my fetish.
It is completely thermally stable.
What a shame. It was a cute little amplifier, but you butchered it with those hideous black heatsinks. Now it looks like some kind of Frankenstein's monster. A true perfectionist's nightmare.I don't give a damn.
Besides, it's a high-quality heat sink, and I can fully indulge my fetish.
It is completely thermally stable.
Are you obsessed with the O-Noorus D1 or something?What a shame. It was a cute little amplifier, but you butchered it with those hideous black heatsinks. Now it looks like some kind of Frankenstein's monster. A true perfectionist's nightmare.
Okay.Are you obsessed with the O-Noorus D1 or something?
It really shouldn't matter to you what I do with it.
These little TPA3255s are very powerful—and that's exactly what I wanted to test out on speakers with a decent setup, meaning an 18-inch woofer and a compression driver in a horn.
It works, but the thermal design could definitely be improved.
The electrolytic capacitors are also located on the PCB right next to the 3255.
View attachment 535103
So I thermally decoupled the capacitors with an insulation pad and, as mentioned, added thermal paste and finally attached the heat sink.
Now everything is just the way I want it.
Here it is without Frankenstein's heat sink, with a FiiO and a WiiM product on the back.
View attachment 535104
View attachment 535105
Thank you, @Bamboszek, if Yes, then it would appear that the BT8961 chip is endeavouring to emulate the AX5689 chip....Nice.
Last week I asked FiiO about PFFB and some other things over an email and on another forum, but never got any response from them.
I'm wondering what is the DAC chip used in this device.
My guess would be that they are using built-in DAC of Bluetooth SoC (BT8961) for all digital inputs.
Measurements on their site look very good but they are made using analog line in.
If measurements provided by @Guddu on the previous page are correct, it would mean that built-in DAC is severely limiting performance of the whole device.
Thank you, @Jeromeof, hmm, the non-linear FR suggests, variance/dependence, and that the PFFB implementation could be (much) better, doesn't it?So I asked FiiO about PFFB support and they actually confirmed that the Level_1 has PFFB - I see today that they have updated their page about the Level_1 to now mention PFFB:
View attachment 535288
I don't think so. PWM modulator is still inside the TPA3255.[...]then it would appear that the BT8961 chip is endeavouring to emulate the AX5689 chip[...]

Yes I agree that graph suggests a poor PFFB implementation but I guess we will see ultimately.Thank you, @Jeromeof, hmm, the non-linear FR suggests, variance/dependence, and that the PFFB implementation could be (much) better, doesn't it?
View attachment 535332
Hopefully next week I should get both Level 1 and dummy load resistors and gonna run some measurements.we will see ultimately
Amplifier for speakers works for correcting headphones? Logic...I think it was designed for headphones
The BT8961B has absolutely nothing to do with the Axign chip—neither in terms of architecture nor technical performance.Thank you, @Bamboszek, if Yes, then it would appear that the BT8961 chip is endeavouring to emulate the AX5689 chip....
View attachment 535321
- High performance 32 Bit RISC-V processorCore with HIFI4 DSP
- Three multi-function 32-bit timers, support Capture and PWM mode
This app/software was initially being used for their headphones and that comment was w.r.t. Auto-EQ section of the app which allows using pre-defined EQ profiles for various different headphones.Amplifier for speakers works for correcting headphones? Logic...
If you had calculated the power requirements beforehand, you probably could have saved yourself the money—especially for a desktop setup.Hey y'all. I purchased the Level 1 and am using it for my desktop setup. I'm running the Fiio K13 R2R as a pre into the Level 1 as a power amp. Having a grand time with it so far. Amazingly, it's considerably smaller than the K13.
I read the observations about its specs being limited by its power supply and curiosity got the better of me, so I also ordered the Aiyima 48 V 10 amp GaN power supply, designed for the 3255. I want to compare the amp's performance with the two power supplies to see what kind of practical difference the upgrade makes for my listening (if any). Taking measurements is completely beyond me, but I wonder if you all have any thoughts about how to test them or what I should be looking for?
Theoretically should the sound be the same with the two power supplies when volume matched? (I can return it if it has no use for my case.)If you had calculated the power requirements beforehand, you probably could have saved yourself the money—especially for a desktop setup.
With the 48V/5A power supply, you have over 130 watts available per speaker at 4 ohms. That should provide plenty of headroom for most setups.
If you don't need that much power, there won't be any difference; meanwhile, the 48V/10A power supply would actually operate with lower efficiency.
Yes, power supply shouldn’t change sound quality on matched level unless faulty.Theoretically should the sound be the same with the two power supplies when volume matched? (I can return it if it has no use for my case.)