Yep 3128 if Fedex finds me 🙂
Latest evm from weakest 32xx family member (3244) has a 3watt wirewound resistor in bom for 2.7R in zobel, strongest member 3255(and older 3251/3250) (older) evm has a 0.75 watt 2010 thick film, maybe TI is still testing pffb themselves.
Latest evm from weakest 32xx family member (3244) has a 3watt wirewound resistor in bom for 2.7R in zobel, strongest member 3255(and older 3251/3250) (older) evm has a 0.75 watt 2010 thick film, maybe TI is still testing pffb themselves.
I also have this 3 watt in my BOM. From simulation, it's needed and can easily blown if someone is injecting 45-50kHz into the amp. (From the simulations) It is advised to limit the amps upper bandwidth when using PFFB.
With load/speaker connected or without ?
I also noticed the bigger than normal 1nF's in output, so they do some what if... testing.
I also noticed the bigger than normal 1nF's in output, so they do some what if... testing.
There shouldn't be (input or psu/brick) signal at filterfrequency 🙂
That could be cause for overcurrent tripping also (the other thread computer flac 3251evm without pffb and tiny powersupply).
I am interested in your sims.
That could be cause for overcurrent tripping also (the other thread computer flac 3251evm without pffb and tiny powersupply).
I am interested in your sims.
I just got one Volt+ and must say this is the best TPA3118 I heard.
Now I only have those cheap Sanwu to compare with but this is dead quiet which I like.
And the bootstrap snubber doing good things for the highs.
24V cheap SMPS as power.
And, I payed $50 to Sweden, no free sample for an review.
Think it's little overpriced but very good sounding.
Now I only have those cheap Sanwu to compare with but this is dead quiet which I like.
And the bootstrap snubber doing good things for the highs.
24V cheap SMPS as power.
And, I payed $50 to Sweden, no free sample for an review.
Think it's little overpriced but very good sounding.
What exactly does the bs snubbers to the highs? Did you compared with snubbers removed/desoldered?
I can just compare to the unmodded Sanwu 3118 which is horrible in the highs and noisy even with the -20db mod compared to Volt+.
Now it's just the first listening but I'm impressed!
It's sounds better than my FX-D802, the feeling I had first time with Sanwu
that this chip have someting I realy like!
Not to hype Volt+ , they just did something you already now how to modify.
Just did a short cut and bought something better than Sanwu.
🙂
🙂 trying the footprint for wirewound smd, they are longer than tpa3128 is, longer than wima 10uF, very close to the 11A inductor's lenght, I bet I don't need magnifyer to solder these LOL
Sanwu seems more quiet than TI's EVM in measurements ? How did you connect the Sanwu ?
Sanwu seems more quiet than TI's EVM in measurements ? How did you connect the Sanwu ?
Just curious which Sanwu 3118 board you have. Is it the tiny PBTL one? I have been using two of them(unmodded) for the past few months and really like it. For my boards, the high are fine (some might find it a bit on the high side) and I do not hear any noise (the boards are set at 32 dB gain I believe), which was what I was looking for when I first got this board. One thing that I found a little annoying is a little pop when I switched them off.
Regards,
I listen very near as desktop, 1 meter.
Thats why I hear noise, back of to the couch 3 meters.
No noise.
Yes it's those tiny ones I don't like the highs on.
It's just bad sounding and shouldnt be there.
Maybe it's your power supply which is noisy? The volt+ has (different) filtering than the Sanwu, which has no filtering.
Maybe thats the thing?
Different filtering?
Have an Kingrex which it's the best I have what ever power supply I try.
Most quiet with good power but still noise with Sanwu and FX-D802.
http://www.kingrex.com/products.php?c=6
Volt+ is dead black with magic 3D sound with a cheap $10 24V SMPS.
And sounds , I dare to say, some of the best I heard in this "cheap" segment!
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Anyone know how the boards like the dug and Weiner board compare to the volt?
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Attachments
What does bottom graph of first set of graphs show ?
Second bandwith graph compares 22pF with 470 pF feedback capacitor opamp ? And 22pF limits bandwith more than 470pF ?
Second bandwith graph compares 22pF with 470 pF feedback capacitor opamp ? And 22pF limits bandwith more than 470pF ?