[dumbears]

Wonder how you make those pins that soldered into the adapter board. Would you mind advising me? Thanks in advance.

 

[bsoplinger]

Wonder how you make those pins that soldered into the adapter board. Would you mind advising me? Thanks in advance.

I just used header pins. You want the round style versus the square ones. I wanted something I'd get quickly so I got 10 of these on eBay where 2 would have been plenty

https://www.ebay.com/ulk/itm/192428838816

 

[endia]

Wonder how you make those pins that soldered into the adapter board. Would you mind advising me? Thanks in advance.

with standard header pins, adapter will have too much height..

instead i'm using these pins;
https://www.aliexpress.com/item/10p...32721243961.html?spm=a2g0s.9042311.0.0.1vYUnW

they have 1.27 mm pitch and you have to pull pins one by one and place onto another 8 pin adapter.. to adjust height i'm using perforated boards but if you use them be careful, solder side should be on the bottom side..
hope this helps, any questions wellcome..

 

[leeperry]

Real men solder VSON in the dark anyway.

 

[imran27]

Just a couple of days back I received my another order of OPA1692 and LME49720

I was enjoying the 1x OPA1692, 2x LME49720, 2x OPA209 configuration in my Burson Play rev1.1

I figured there is some lousiness in low end which needs to be rectified. The bass notes didn't decay fast enough.

Next config: 1x LME49720, 2x OPA1692, 2x OPA209
This config rectified the issues very very well but the top end became slightly unnatural. Bass impact and speed improved a lot. The decay was quite fast, details had much better separation and were lot cleaner with a darker background.

3xOPA1692, 2x OPA209
This is the config which I am using right now.
Superb in terms of low end performance. Mids are quite natural. But the top end is less natural than any of the previous configs. Best instrument separation I have heard with chip opamps.

3x LME49720, 2x OPA209:
This config gives the most natural tonality. But the technicalities of sound like attack and decay, background/noise floor, etc. are pretty bad. Separation and imaging is bad, layering is bad.
Basically, tonality is all you get with this config.

1x V6 Vivid, 2x OPA1692, 2x OPA209:
This config sounds best of all. Even compared to configs more V6V's, this is the one that has best of everything like tonality, technicalities (attack/decay, extensions, background/noise floor) and presentation (imaging, separation, layering, etc.)
One complain I had with V6V is it is extremely subtle with the low end. That is resolved with OPA1692 in LP. Also, the highs did't seem very revealing and natural. I wanted highs something between OPA1692 and OPA2209. 2x OPA209 in gain stage solved that. Gave me amazing transparency of preceding stages with a good smooth textured mid range and top end, highs especially are pretty forward with OPA209, but OPA1692 has some roll off in the highs with pretty good extension. So overall synergy is perfect.

If I had to give up discrete opamps, OPA1692 is the one I would use for I/V. Best of all I have tried. V6V is better than OPA1692 but OPA1692 isn't extremely far off from V6V and that's bragging rights for OPA1692 considering it's dirt cheap price
For I/V: OPA1692 is best, compared to - OPA1612, OPA2192, OPA2209, OPA1652, NE5532, LME9720, OPA1622, OPA1602, OPA1662
For LP: OPA1692 for now, I have good expectations from OPA2209 but they are out of stock.
For gain: OPA209 but only against NE5534 and V6V singles.

Will be trying these in gain stage: OPA1611, ADA4610-1, OPA189
Will be trying these in LP stage: OPA2209

Any suggestions are always welcome.

 

[pelopidas]

Mouser is out of the 2209 but they are availabe on Digikey last I checked.

 

[Rroff]

Just a couple of days back I received my another order of OPA1692 and LME49720

I was enjoying the 1x OPA1692, 2x LME49720, 2x OPA209 configuration in my Burson Play rev1.1

I figured there is some lousiness in low end which needs to be rectified. The bass notes didn't decay fast enough.

Next config: 1x LME49720, 2x OPA1692, 2x OPA209
This config rectified the issues very very well but the top end became slightly unnatural. Bass impact and speed improved a lot. The decay was quite fast, details had much better separation and were lot cleaner with a darker background.

3xOPA1692, 2x OPA209
This is the config which I am using right now.
Superb in terms of low end performance. Mids are quite natural. But the top end is less natural than any of the previous configs. Best instrument separation I have heard with chip opamps.

3x LME49720, 2x OPA209:
This config gives the most natural tonality. But the technicalities of sound like attack and decay, background/noise floor, etc. are pretty bad. Separation and imaging is bad, layering is bad.
Basically, tonality is all you get with this config.

1x V6 Vivid, 2x OPA1692, 2x OPA209:
This config sounds best of all. Even compared to configs more V6V's, this is the one that has best of everything like tonality, technicalities (attack/decay, extensions, background/noise floor) and presentation (imaging, separation, layering, etc.)
One complain I had with V6V is it is extremely subtle with the low end. That is resolved with OPA1692 in LP. Also, the highs did't seem very revealing and natural. I wanted highs something between OPA1692 and OPA2209. 2x OPA209 in gain stage solved that. Gave me amazing transparency of preceding stages with a good smooth textured mid range and top end, highs especially are pretty forward with OPA209, but OPA1692 has some roll off in the highs with pretty good extension. So overall synergy is perfect.

If I had to give up discrete opamps, OPA1692 is the one I would use for I/V. Best of all I have tried. V6V is better than OPA1692 but OPA1692 isn't extremely far off from V6V and that's bragging rights for OPA1692 considering it's dirt cheap price
For I/V: OPA1692 is best, compared to - OPA1612, OPA2192, OPA2209, OPA1652, NE5532, LME9720, OPA1622, OPA1602, OPA1662
For LP: OPA1692 for now, I have good expectations from OPA2209 but they are out of stock.
For gain: OPA209 but only against NE5534 and V6V singles.

Will be trying these in gain stage: OPA1611, ADA4610-1, OPA189
Will be trying these in LP stage: OPA2209

Any suggestions are always welcome.

If you have one (and it works in that position - needs a gain of 5+ to be stable) I'd be curious what your impression would be of say AD8066 in the gain position into say OPA2209 and 209 - gonna try and test that myself sometime but my current amps are hardwired for 2.5x gain.

 

[CoiL]

Hey, any comments about Burson dual-V5i instead NE5532 @ HO opamp (separate amp board inside) with my Aune T1 ?
Also wondering if it will improve SQ if I use V5i instead DAC opamp OPA2134 ?
I have already upgraded power input filtering caps for Panasonic FR and coupling capacitors for SilmicII. Using Siemens E88CC goldpin tube as buffer.

 

[dumbears]

What are the best opamp you believe for LPF? What are the requirements for selection? Pls advise. Thanks!

 

[raoultrifan]

I got very good results, especially in regard with low-noise, when using AD8599, MUSES8920 and SS V6 Classic.

 

[LaughMoreDaily]

I got very good results, especially in regard with low-noise, when using AD8599, MUSES8920 and SS V6 Classic.

What are you referring to? Good results for doing what?

 

[raoultrifan]

The above is my answer to "What are the best op-amp you believe for LPF?"

Using these op-amps I got the best SNR (extremely low-noise), lowest THD, very low DC-output voltage and, of course, a perfectly flat bandwidth response (well, even a 5532 has a perfectly flat response) and the most important: no oscillations occurred from 0 to 10 MHz (FFT spectrum is clean).
Tests done with ASUS Essence One MKii and BURSON Play.

L.E.: LM4562 is great op-amp for use in LPF too.

 

[spacequeen7]

Hi everyone ,was wondering if I can get some advice on my newly acquired ,cheapo SMSL Audio Sap-II Pro,I like to try few op-amps and pair with Topping D50 (3x OPA1612A )
I have this old timers coming my way (OPA2107,OPA2111 and OPA1612 ) but not sure what's the latest and greatest ,also was wondering if this beauty will work ?
https://www.ebay.com/itm/Sonic-Imag...pAmp-HDAM-DIP8-enhanced-upgrade-/251471560791

she's ready ..

 

[raoultrifan]

TI recommends OPA2134/4134: http://www.ti.com/lit/ds/symlink/tpa6120a2.pdf, so I'm sure this should work very well. I would try AD797 or AD8599 because of the very low-noise feature, but also MUSES8820/8920.

If you do have OPA1612 coming over, then it should work perfectly too.

Not sure why spending on that discreet op-amp almost twice of the entire amplifier. All you need is a wire with gain to pump-up the music into the output stage.

 

[Rroff]

Not a fan of the OPA2134 personally - it is like someone playing (on an instrument) the same tune for the 1000th time - accurate enough but with none of the passion or nuance of the first few times. If I'm in the mood for that so called "burr-brown" slower lazier sound I prefer the OPA2228 but as with my comments about the AD8066 below you can't just drop that into any old circuit and get good results - the OPA2227 is a more drop in replacement but doesn't sound quite the same as the 2228.

OPA1612 is decent the only reason I'd use anything else really is that the 1612 tends to be a tiny bit cold/bright and sometimes a touch synthetic otherwise it produces very high quality and quite pleasing results. I use the AD8066 as an alternative if/when I get bored of the 1612 quite a lot as it has a darker background and decent low end but it isn't a straight drop in for a lot of circuits unless you know the circuit setup.

LM4562 is always worth a try as it produces very high quality results but can be a touch susceptible to being upset by noise, etc. if you like it then it might be worth considering some of the LME4xxxx series.

Personally I don't tend to stray far from what I've mentioned above these day - got some OPA1692 to try but been too busy to spend the time (and considering *****ing out and buying a hot air rework station to solder them as I've too much on my mind to have much patience trying to solder VSSOP with a regular iron right now).