Giordano, you're right that it won't be optimal.. but its very conveniant . I was thinking that the dc from the IC inputs pins would create a current flow through the secondary winding to saturate the transformer. I'm unsure how that DC situation will affect things. I think my safest bet is to connect 4+ in paralell on each channel to lower the output impedance. They are very inexpensive after all..
Hello,
So now the problem of driving comes
I'm using the balanced, no driving opamp version directly connected to a Focusrite Scarlett i2i balanced output with great success. Despite it is an IC, I found the sound of it together with the Focusrite to be well balanced with warmth and details.
On the other hand, for portable, I want to make a relative small, lightweight, unbalanced, but as good as I can make DAC+headphone amp.
On another thread I was looking for what currently available DAC chip to use, but I've got a great advice how to use still my favorite DAC, the AD1865 without the I2S reclock, interface etc. circuits, only with an XMOS input with 2 osc, than an FPGA to create the 18bit pcm signal for the AD1865. So, sorry for the sideways, now I want to interface an AD1865 to the TPA6120. I would use as less opamps as possible, but as I see I need minimum 2. One on the I/V output resistor after the AD1865, before volume control pot, but I need another one after the volume control pot.
How would you guys do it? What opamps would you use? I do not have experience with opamps since about 2007, when I "switched" to tubes. Obviously, on this circuit I will not use interstage transformer and tube amplification, but what is the best opamp and circuit I can use than?
The headphone would be a HD800S, so I rather go on the warm side.
Thanks!
JG
So now the problem of driving comes
I'm using the balanced, no driving opamp version directly connected to a Focusrite Scarlett i2i balanced output with great success. Despite it is an IC, I found the sound of it together with the Focusrite to be well balanced with warmth and details.
On the other hand, for portable, I want to make a relative small, lightweight, unbalanced, but as good as I can make DAC+headphone amp.
On another thread I was looking for what currently available DAC chip to use, but I've got a great advice how to use still my favorite DAC, the AD1865 without the I2S reclock, interface etc. circuits, only with an XMOS input with 2 osc, than an FPGA to create the 18bit pcm signal for the AD1865. So, sorry for the sideways, now I want to interface an AD1865 to the TPA6120. I would use as less opamps as possible, but as I see I need minimum 2. One on the I/V output resistor after the AD1865, before volume control pot, but I need another one after the volume control pot.
How would you guys do it? What opamps would you use? I do not have experience with opamps since about 2007, when I "switched" to tubes. Obviously, on this circuit I will not use interstage transformer and tube amplification, but what is the best opamp and circuit I can use than?
The headphone would be a HD800S, so I rather go on the warm side.
Thanks!
JG
opa1612你好
所以现在驾驶的问题来了
我正在使用平衡的,没有驾驶运算放大器的版本直接连接到Focusrite Scarlett i2i平衡输出,并取得了巨大的成功。尽管它是一个IC,但我发现它与Focusrite的声音与温暖和细节很好地平衡了。
另一方面,对于便携式,我想做一个相对小,轻巧,不平衡,但尽可能好的DAC +耳机放大器。
在另一个线程上,我正在寻找当前可用的DAC芯片,但我得到了一个很好的建议,如何使用我最喜欢的DAC,AD1865,没有I2S重锁,接口等电路,只有一个XMOS输入和2 osc,而不是FPGA为AD1865创建18bit pcm信号。所以,很抱歉侧向,现在我想将AD1865连接到TPA6120。我会使用尽可能少的运算放大器,但正如我所看到的,我至少需要2个。一个在AD1865之后的I/V输出电阻上,在音量控制电位器之前,但是在音量控制电位器之后我需要另一个。
你们会怎么做呢?你会使用什么运算放大器?自从2007年左右我"切换到"电子管以来,我就没有使用运算放大器的经验。显然,在这个电路上,我不会使用级间变压器和电子管放大,但是我能用到的最好的运算放大器和电路是什么呢?
耳机将是HD800S,所以我宁愿去温暖的一面。
谢谢!
Translation.
''Hi So here comes the driving question. I am using the balanced, no driving op-amp version connected directly to the Focusrite Scarlett i2i balanced output and have had great success. Even though it's an IC, I found it to be well balanced with the Focusrite's sound with warmth and detail. On the other hand, for portable, I want to make a relatively small, lightweight, unbalanced, but as good a DAC headphone amp as possible. On another thread, I was looking for currently available DAC chips, but I got a good suggestion how to use my favorite DAC, the AD1865, with no I2S relock, interface, etc. circuits, just one XMOS input and 2 osc, not FPGA to create 18bit pcm signal for AD1865. So, sorry for the sideways, now I want to connect the AD1865 to the TPA6120. I would use as few opamps as possible, but as I can see I need at least 2. An I after the AD1865''
''Hi So here comes the driving question. I am using the balanced, no driving op-amp version connected directly to the Focusrite Scarlett i2i balanced output and have had great success. Even though it's an IC, I found it to be well balanced with the Focusrite's sound with warmth and detail. On the other hand, for portable, I want to make a relatively small, lightweight, unbalanced, but as good a DAC headphone amp as possible. On another thread, I was looking for currently available DAC chips, but I got a good suggestion how to use my favorite DAC, the AD1865, with no I2S relock, interface, etc. circuits, just one XMOS input and 2 osc, not FPGA to create 18bit pcm signal for AD1865. So, sorry for the sideways, now I want to connect the AD1865 to the TPA6120. I would use as few opamps as possible, but as I can see I need at least 2. An I after the AD1865''
The model of operational amplifier is opa1612Hello,
I can not translate it. Google translate only finds a few words. Please write in English.
Thanks!!
JG
)The model of operational amplifier is opa1612
Thanks! , I did not realize it was my own text and tried to translate back
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