• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

DIY amp for HD660s

I am running the HD660S using the new topping e30 DAC. I am looking for an OTL amp to complete my setup. I enjoy EDM, classical, clear strong hitting bass , warm sound and dislike high pitch tremble.
My budget is around $200, $300 tops.
I am debating whether a diy option would yield better results for my setup, when compared with a prebuilt solution with tube rolling e.g. darkvoice.
If there is indeed a popular and well tested diy option any guidance would be greatly appreciated.
Thanks in advance.