I'm also interested of what value input caps should be ideal for this amp.
I sent a private message to member PPY and asked him about this.
From what I could see in the picture he did ad earlier in this thread it looks to be 35V 22uf that he choose to use but can't be 100% sure since the foto has a bad angle for reading the value marking on the capacitor.
Should the input caps value be chosen taking in account the connected source output values? I'm very new to electronics/amps so sorry for my stupid questions and ignorance in this matter.
I sent a private message to member PPY and asked him about this.
From what I could see in the picture he did ad earlier in this thread it looks to be 35V 22uf that he choose to use but can't be 100% sure since the foto has a bad angle for reading the value marking on the capacitor.
Should the input caps value be chosen taking in account the connected source output values? I'm very new to electronics/amps so sorry for my stupid questions and ignorance in this matter.
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It's not a must to place the input caps right there on top of the Sure board, so you can link them directly to input RCA solders and turn the switch on (disconect on board input caps). As an example I'll build the preamp stage (with volume pot and input caps) into a different eclosure.
The power caps are some 470uf @ 63V, as I found in some high res pics on google image search. I bet it's ok to use bigger caps. I'll be using Nichicon 3300uF @ 50V (along with a 40V SMPS).
Can someone help me? I want to try capacitors for the AA-AB32512 (not 32313). What are the specs of the capacitor need to be? How do I know what kind I should be using? 10uf 16V or say 10uf 50V or some other random capacitor? How do you do the measurement when selecting it? Also does this board need two or one capacitor? Does it matter? Sorry for too many questions
Keep asking questions
Most Chinese boards have a pop sound when turn on or/and off the power. Is this a design issue? Cheaper parts issue? Can it be eliminated? The AA-AB32512 although not TOO bad still has pop sound. Any comments?
I'm looking for something similar, not too familiar with how things like this works, checked on several online shops and there's "soft start boards" which works like a delay if I understood it correctly, would something like that work?
Ok I got this amp AA-AB32313 with Meanwell 600W hlg 600 48a and 23 ladder step potentiometr.
Simple connection. Input signal goes through potentiometr and then to sure amp.
Problem I got is that output level is really quiet till let say 20 steps , and its comparable with 1/3 volume level on my other smsl SA-98SE (TDA7498E) amp.
So basicly to at the same volume amp has to be 2 steps down from maximum? is that normal for amp (2x400 used with 600w power supply?) I can easly put on full volume and it still volume is not as laud as half volume on smsl.
Simple connection. Input signal goes through potentiometr and then to sure amp.
Problem I got is that output level is really quiet till let say 20 steps , and its comparable with 1/3 volume level on my other smsl SA-98SE (TDA7498E) amp.
So basicly to at the same volume amp has to be 2 steps down from maximum? is that normal for amp (2x400 used with 600w power supply?) I can easly put on full volume and it still volume is not as laud as half volume on smsl.
That's not a poteniometer, that's a step attenuator. And that's got nothing to do with the power, it's about the input level. The voltage divider got probably a non-ideal resistance for the amp or you might have connected it wrong?
Friend of mine was saying ,its always better to have a "headroom" with preamp or you can get that issue on tracks not recorded to max level when using just poweramp with potentiometer.
Well i dont think you can connect something wrong and get the output signal on potentiomentr. simple pot in and out to sure input.
I am not sure where the problem is , maybe I should order sure dedicated digital volume controller and see if its the same level.
No, first test how the level is without your switch attenuator (not a potentiometer). Because if the level is still not high enough, you don't need to dampen it but to amplify instead. The digital volume controller isn't a preamplifier.
Besides that, if it's enough without then there's something wrong with your switch or how you use it. Why don't you tell us which type it is (link?) and how you connected it?
Besides that, if it's enough without then there's something wrong with your switch or how you use it. Why don't you tell us which type it is (link?) and how you connected it?
AA-AB32313
It seems I read that if this amp is turned on without speakers hooked up it can blow the amp. If that is true, is there a way to protect the amp from that? I have had speakers wires come undone unintentionally and unnoticed several times in my life.
I have read all 20 pages of this thread and will probably get the board and a power supply.
It seems I read that if this amp is turned on without speakers hooked up it can blow the amp. If that is true, is there a way to protect the amp from that? I have had speakers wires come undone unintentionally and unnoticed several times in my life.
I have read all 20 pages of this thread and will probably get the board and a power supply.
How can I test this level without attenuator ? not quite sure what you mean.
I have installed this one:
Valab 23 Step Ladder Type Attenuator Potentiometer 50K Log Stereo | eBay
Assume everything else is OK, then the 50K attenuator is too high in this case, because the input impedence of this amp is 27K (33K?), you need no more than 10K
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