My current CD 650 tuning project

Headphone Amp's

Headphone Amp with tubes ....... in future

Stock of OP AMP's ...  nd more .....  but not all listed  .......
NS - LM6171, LM6172, LM6181, LM4562, LME49710
BB / TI - OPA655P, OPA134, OPA2132, OPA2227, OPA2228, OPA627, OPA637, OPA2134, OPA227, OPA228, OPA604, OPA2604, BUF634P, BUF634T, DRV134
AD - AD711, AD811, AD797, AD9631, AD9632, AD812, AD823, AD8610, AD797, AD843, AD847, AD8065,  OP275
PMI - OP279, OP113, SSM2135
ON Semiconductor -  SE5532, SA5534 / SE5534
Maxim - MAX410, MAX412, MAX427, MAX437
Look like's as in BUF634_Schemas
Or as Per-Anders Sjstrm's - QRV-04 the high performance smd headphone amplifier

Jelmax H.P. BlacK Gate - The champion of the circuit cleaning; Black Gate as a super-E-Caps capacitor

Step 4 - the final circuit

〈Performance〉
It was surprising that all the problems worried about at item (3) were resolved by replacing all the capacitors with the super-E-Caps.
An amplifier made by Ippinkan, in which all the capacitors are replaced by the Black Gates, is connected to the output side.

〈Capacitor〉
BGN 16V 33μ2
Non-polarized Black Gate
Super-E-Caps
--------------------------
BGN 50V10μ2
Non-polarized Black Gate
Transcendence electron transfar

What is the "Super-E-Caps"?
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A pair of nonpolarized Black Gate electrolytic capacitors are particularly connected in parallel or in series so that each one of the capacitors cancels the internal magnetic flux generated by the other, thereby completely eliminating internal resonance and decreasing total impedance to absolute zero as the frequency increase.

An ultimate DC current power source revolution by the ultra electrolytic capacitor Black Gate  - 無題ドキュメント

Source (C) - Jelmax H.P. TOP page

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