I was sent 2 Burson V6 Vivid opamps in return that I made an little Review.
First of I nedeed a device to put it in,I´n my main rig I dont use opams at all.(except for the DSP)
So I thought of the old headphone amp that uses opamps.So I dug it out but it Needed a new PCB.
So I found this on the Aliiexpress.
Ok I found out it is a buffer, 2v in 2v out.But I couldnt find any other so it will do.
I listened a short while With the NE 5534 That came with the board,they sound kind of gray to me. (By the way I use Sennhizer HD650 and the Asus xonar essence).
First of I nedeed a device to put it in,I´n my main rig I dont use opams at all.(except for the DSP)
So I thought of the old headphone amp that uses opamps.So I dug it out but it Needed a new PCB.
So I found this on the Aliiexpress.
Ok I found out it is a buffer, 2v in 2v out.But I couldnt find any other so it will do.
I listened a short while With the NE 5534 That came with the board,they sound kind of gray to me. (By the way I use Sennhizer HD650 and the Asus xonar essence).
With the Bursons in I noticed that the midrange was more presence.
And they plays realy tight,and the bass guitar sounds relly deep.
the cymballs are there but not excessive ,maybe that is called warm sound?
They never sound sharp.
I would have loved to compare the Vivid to the classic.
The psu Is LM17/337 with ripple eater-
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I mostly listen to music like Mos Generator,Zakk Whylde Joe satriani and Iron Maiden an stuff like that.
Do it again blind. When you are given something for free, your mind gets twisted ;-)
At leats post this in the commercial sector - its called gerilla advertisement..
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At leats post this in the commercial sector - its called gerilla advertisement..
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unfortunately all my opamps are stuffed in to cartons,since Im moving.
But I will order a pair of OPA134 and compare them.
I have fft on my scope unfortunately I have never used it,I will try it...
But I will order a pair of OPA134 and compare them.
I have fft on my scope unfortunately I have never used it,I will try it...
This is how FFT shows on my scope:
Tell me what I see.....
Is there a software so that I can do this on the computer?
Tell me what I see.....
Is there a software so that I can do this on the computer?
I found a pair of OPA1611 laying around here,and I ve been trying to find out what differs the 2 from each other.
The OPA1611 is slimmer in the bottom compared to Burson.
Not that the OPA lacks bass,it doesnt.and it got a little more energy in the top.
Now I´m waiting on my OPA134.
The OPA1611 is slimmer in the bottom compared to Burson.
Not that the OPA lacks bass,it doesnt.and it got a little more energy in the top.
Now I´m waiting on my OPA134.
I got the OPA134,but its kind of hard to tell the difference,
But I think I can safly say that the Burson has got more bas and midlle bas than the others.Better or not ?
But I think I can safly say that the Burson has got more bas and midlle bas than the others.Better or not ?
That's normal.Opa134 has 4mA quiescent current per 1 amplifier while the Burson v6 has 8mA, the equivalent of two opa134 in parallel.Now two opa132 (similar 4mA quiescent current per 1 amplifier) in parallel cost 10 bucks while 1 Burson is 80 Bucks and takes the space of 4 ..6 opa134. 4 x OPA134 will have 16mA quiescent current and cost 40 bucks , while being the equivalent of two Burson in parallel that cost 140 bucks...So you lost 100 bucks per space taken by one Burson.Simple math...
You put one opa134 work on a lighter load , half of burson's load and you get the same base response.
Or you add a buffer done with bc337/bc327 to opa134 and you get plenty of base capability, way beyond Burson can do.
Here's one running at 12mA:
https://www.head-fi.org/threads/cheapie-amp-based-on-the-ne5534.410696/
This kind of discrete buffers can get you even a 10 watt /8 ohm amplifier with the right transistors.
There's also the possibility of using one op amp to buffer a second one:
https://www.redcircuits.com/Page155.htm
You put one opa134 work on a lighter load , half of burson's load and you get the same base response.
Or you add a buffer done with bc337/bc327 to opa134 and you get plenty of base capability, way beyond Burson can do.
Here's one running at 12mA:
https://www.head-fi.org/threads/cheapie-amp-based-on-the-ne5534.410696/
This kind of discrete buffers can get you even a 10 watt /8 ohm amplifier with the right transistors.
There's also the possibility of using one op amp to buffer a second one:
https://www.redcircuits.com/Page155.htm
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If more bass on lower impedance headphones is of interest here's a 38mA quiescent current per amplifier with germanium trz buffers for opa132:
https://www.diyaudio.com/community/threads/germanium-foundation-chapter1.381869/#post-6961885
I built it for less than 30 bucks .
I can go safely to 150mA idle current by making the emiter resistors 1 ohm and basically drive 1 watt rms 8 ohm speakers in pure class A with +-5v supply.
https://www.diyaudio.com/community/threads/germanium-foundation-chapter1.381869/#post-6961885
I built it for less than 30 bucks .
I can go safely to 150mA idle current by making the emiter resistors 1 ohm and basically drive 1 watt rms 8 ohm speakers in pure class A with +-5v supply.
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Just to straighten thing out:
Sennheiser hd 650 are 300 ohms headphones.If you add a 330 ohms resistor at the output of opa132 in series with your headphones you get a pretty predictable 600 ohms load for which you can find thd graphs in the datasheet.If you compare the datasheet between opa132 and opa134 you see opa132 has 10 x less distortions than opa134 at 10x gain(normal for headphones amplifiers) 20khz: 0.0025% vs 0.027%
No matter what you use for amplification you get better bass response with increased quiescent currents, but increasing the output impedance which asks also for higher supply rails(+-9V is usually enough for opa132 on 600 ohms) will help a simple op amp get enough base response .
Sennheiser hd 650 are 300 ohms headphones.If you add a 330 ohms resistor at the output of opa132 in series with your headphones you get a pretty predictable 600 ohms load for which you can find thd graphs in the datasheet.If you compare the datasheet between opa132 and opa134 you see opa132 has 10 x less distortions than opa134 at 10x gain(normal for headphones amplifiers) 20khz: 0.0025% vs 0.027%
No matter what you use for amplification you get better bass response with increased quiescent currents, but increasing the output impedance which asks also for higher supply rails(+-9V is usually enough for opa132 on 600 ohms) will help a simple op amp get enough base response .
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Ive gotten the Burson (Orange) Classic to now.Been listening for a few hours now with my Audeze LCD 2.
And the first that struck me is that voices is stronger and the guitars are more uppfront,
(I most listen to Blacjk Label Society.Mos Generator an similar)
I think they are easier to listen to.
I ll keep on listenning.
And the first that struck me is that voices is stronger and the guitars are more uppfront,
(I most listen to Blacjk Label Society.Mos Generator an similar)
I think they are easier to listen to.
I ll keep on listenning.
I'm not trying to be agressive or rude, I honestly don't, but do you even know how irrelevant your try is on a technical forum? I understand it's part of the trade with Burson, they give you the opamps, you write your opinion in return, but this kind of posts are aimed at people with less skills in electronics that look for magic.
I can tell that I am using only one opa2228 to drive my 250 ohms and they sound very well and I followed only the datasheet recommendation on loading, minimum gain and the best wiring for minimum common mode distortions in any op amp based circuit...and the constraint of using what I have at hand.Opa2228 is not a cheap op amp unlike ne5534, but still 8 times cheaper than one burson and you need two Bursons for any given stereo circuits.
You could make your original ne5534 circuit sound very well if you knew how to do it...
The only good thing is that you got the Bursons for free 🙂 A guy buying the Bursons would spend 16 x more money than what I spend on the most expensive audio op amp chip that can drive 600 ohms loads with ease.
I can tell that I am using only one opa2228 to drive my 250 ohms and they sound very well and I followed only the datasheet recommendation on loading, minimum gain and the best wiring for minimum common mode distortions in any op amp based circuit...and the constraint of using what I have at hand.Opa2228 is not a cheap op amp unlike ne5534, but still 8 times cheaper than one burson and you need two Bursons for any given stereo circuits.
You could make your original ne5534 circuit sound very well if you knew how to do it...
The only good thing is that you got the Bursons for free 🙂 A guy buying the Bursons would spend 16 x more money than what I spend on the most expensive audio op amp chip that can drive 600 ohms loads with ease.