Wiim Pro+ OPAMP replace

Musician said:
You said earlier you didnt have any measurement instrument ? Unsoldering smd components without the right skills and tools are almost impossible.
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I answered earlier to measure distortion. I can't do that. RTFF! I only have a multimeter.I measured 24v on the power pins. I measured it several times.
Soldering...it was very easy for me.
 
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sym -12 / +12
(24v)
5534...Wide Supply-Voltage Range ±3 V to ±20 V
1611..... Wide Supply Range: ±2.25 V to ±18 V
 
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canard said:
sym -12 / +12
(24v)
5534...-+20v
1611..... -+18v
Click to expand...
Yes, the opamp ic in the ViiM probably works at +-12 volts. (That's why I measured 24 volts on the pins) Factory max. It was +-20v
So we are within the limit.
Although I don't understand where is the 0 (ground) of this?

OPA627 Supply voltage, Vs = (V+) - (V-) 9 (±4.5) 30 (±15) 36 (±18) V
OPA1611 Supply voltage (V+ – V–) 4.5 (±2.25) 36 (±18) V

Of course there is no problem with it. It works great.
 
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For those who have sufficient soldering skills, I recommend replacing the opamp. I think it's worth it.
;)
 
It lies VIIM to the analog output thd+n "(analog out) 0.00023%"

SA5534
"THD + N at 1 khz (TYP) (%) 0.002"

I think I solved this lie.

OPA 1611
"THD + N at 1 khz (TYP) (%) 0.000015"
 
zacci said:
please don't be smart, just look at my previous posts. RTFF!
I measured 24v on the power pins. I measured it several times.
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Edit : ok , I have sen your picture of the soldered opa1611 (y). Good work.
I appologise
 
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I've been looking at buying a Wiim Pro to use as a transport for my diy dacs , I'm tempted to try the pro + just to see how well it compares against my dacs .It'll be good to see if the audio board has potential to be modded to elevate the performance so I find these threads interesting, share ideas etc
 
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Sacci,

I haven't done anything like this, but I have friends who can help and can actually do it.

Supplement to clarify I just solder a new op amp and place of the old one nothing else needs to be done? Would the 1656 be okay or no ? How about sparkos ?
 
The price isn't prohibitive so I want to put the best one in there in other words if I'm going to go to the trouble I want the biggest improvement I can get
 
brjoon1021 said:
Sacci,

I haven't done anything like this, but I have friends who can help and can actually do it.

Supplement to clarify I just solder a new op amp and place of the old one nothing else needs to be done? Would the 1656 be okay or no ? How about sparkos ?
Click to expand...
But the OPA1611 is better respect at OPA1655. Attetion with OPA1656 is dual opamp with diffetent pinout, you can demage the analog part or the WiiM.
 
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brjoon1021 said:
The price isn't prohibitive so I want to put the best one in there in other words if I'm going to go to the trouble I want the biggest improvement I can get
Click to expand...
Its rather cool to have a good analog stage inside the streamer , and Im sure the opa1611 has an audible better sound. But I wonder if a SMSL su1 dac would bring about the same soundquality change ?

A better LPS for the WiiM pro is also a worthwile improvement, maybe on par with changing the ne5534.
 
Sorry. I thought the 1656 was the ideal one.... I don't know... And a poster suggested that the original opamp is bipolar and should be or must be replaced by a bipolar ?
I generally like the sound of MOSFETs or jfets better than bipolar so wondering about this
 
brjoon1021 said:
Sorry. I thought the 1656 was the ideal one.... I don't know... And a poster suggested that the original opamp is bipolar and should be or must be replaced by a bipolar ?
I generally like the sound of MOSFETs or jfets better than bipolar so wondering about this
Click to expand...
FETs has a high input impedance . Im sure the layout is done to secure good performance using bipolar ICs with lower input impedance.
The 1611 is perfect for the job. If you want a slightly warmer sound - buy a Rega dac ;)
 
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