It looks like the specs on the AA-AB32514 are much better than the AA-AB32512:
SNR260W @3Ω THD+N 1%-78.429-dB vs 310W @3Ω THD+N 1%-95-dB
Output Noise Level A-weighting,Input Connected to GND 355.62 µV vs 240uV
Noise Floor -50.599 vs -103.753
seems to run about 18c cooler (check scale in thermal shots) -- possibly fine with no fan on the heatsink.
The 32514 looks like the one to get, assuming it sounds as good as the others.
SNR260W @3Ω THD+N 1%-78.429-dB vs 310W @3Ω THD+N 1%-95-dB
Output Noise Level A-weighting,Input Connected to GND 355.62 µV vs 240uV
Noise Floor -50.599 vs -103.753
seems to run about 18c cooler (check scale in thermal shots) -- possibly fine with no fan on the heatsink.
The 32514 looks like the one to get, assuming it sounds as good as the others.
I am still very satisfied with the 200W after doing some comparisons with some of my other amps. After just recently building the V-fet amp by Nelson Pass there is no doubt that the V-fet is in another class but this $40 board is still amazing me in the sound for such little money. A V-fet built by Nelson Pass was auctioned off on Ebay for a worthy cause recently and brought $3500 for a comparison of cost. My test is could if I live with a new amp I have built if it were my only amp and the answer is yes for the AA-AB32281 and it sounds much better than some of my other amps I have built using the same test. This is with a Meanwell 24V switcher turn up to 29V at 6.5 amps 150W. Plenty enough power using horns. Ridiculous for the quality of sound for $40.
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I am also very pleased with the sound of AA-AB32313. I have tried a lot of different amplifiers Class D. AA-AB32313 it is better that I could hear. The main amplifier in my house - Class A Pass Aleph. In direct comparison, AA-AB32313 and Pass Aleph, of course wins Class A. But the benefits are very small. In a blind test with a pause of 5 minutes I was probably not unlike those amplifiers.
Be sure to replace the input ceramic capacitors - SW1 OFF and install Elna Silmic II.
Be sure to replace the input ceramic capacitors - SW1 OFF and install Elna Silmic II.
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If these boards are like previous Sure tripath based amps then you will want to replace those power supply caps along the side and go linear instead of the switcher. You should get substantial benefit from that.
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This is very interesting comparison because Aleph 3 is my all time favorite amp to this day. The reason why I started to love Digital Amps because some of them reminded me of the Aleph 3 (Pass Labs of course in another league). However, Class A runs too hot and very expensive. Class D runs cool and CHEAP. I was interested in buying the new TPA3255 amp/board but now I see your post and very curious to try the AB32313. Is it THAT close to Aleph?
Also Parts Express says these are new (Sure). How is it new when Tripath has gone out of business? Did Sure just make these amps with old chips and improve its sound? I have a TP60 Tripath amp and although it is nice, not better than my Sure TPA3116, IMO.
I have an amplifier TPA3251. It sounds good, but sterile like all amplifiers D class. Sound AA-AB32313 more natural.
I had too little time for this amplifier. I got it only three days ago.
I can say exactly what it is not inferior to my favorite amp Pass Aleph Mini on three parameters:
The high-frequency part of the sound worse and there is less information than in class A. I can not hear "the movement of air in the concert hall" and the sound at high frequencies a bit dirty.
But I'll leave that AA-AB32313 for everyday listening. Because my class A long warming (about 40 minutes) and too hot.
I had too little time for this amplifier. I got it only three days ago.
I can say exactly what it is not inferior to my favorite amp Pass Aleph Mini on three parameters:
- Stereo scene.
- Low-frequency range.
- The mid-range. The vocals sound as naturally as on the Pass Aleph.
The high-frequency part of the sound worse and there is less information than in class A. I can not hear "the movement of air in the concert hall" and the sound at high frequencies a bit dirty.
But I'll leave that AA-AB32313 for everyday listening. Because my class A long warming (about 40 minutes) and too hot.
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This is how I always explain to my friends how my Aleph 3 sounded. I could see the music in the air. That's why I love this amp as NO other amp could do this.
Looks like we both have similar taste in sound. Do you think among all the Digital amps you have heard, AB32313 is the closest to Aleph?
Yes!
But we should not have illusions. This amplifier is still not catching up on sound magic intelligence to Pass Aleph.
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Yes!
But we should not have illusions. This amplifier is still not catching up on sound magic intelligence to Pass Aleph.
May I ask how you power up the AA-AB32313? The stock version still got potential for improvement e.g. input cap, decoupling cap, linear power supply, on-board regulator...etc.
Power supply SMPS300R 30V adjustment at least 27V.
Linear power supply for this amplifier is not recommend to use.
canvas, I just got this amp. I am planning to his tweak. But without schematic diagrams make it difficult, it will take time.
The first thing I did was replacing the input ceramic capacitors for high-quality audio electrolytic - Elna Silmic II.
Linear power supply for this amplifier is not recommend to use.
canvas, I just got this amp. I am planning to his tweak. But without schematic diagrams make it difficult, it will take time.
The first thing I did was replacing the input ceramic capacitors for high-quality audio electrolytic - Elna Silmic II.
Can someone tell me if this is a good SMPS for this board?
48V 350W 7.3A
https://cdn.kyklo.co/assets/W1siZiI...MjBEYXRhc2hlZXQucGRmIl1d?sha=30dfef79d19d25f1
48V 350W 7.3A
https://cdn.kyklo.co/assets/W1siZiI...MjBEYXRhc2hlZXQucGRmIl1d?sha=30dfef79d19d25f1