I ais for a short time so I could not judge the reliability over the long term

say it is not too bad, although it dpanne ca allows a return or cost of a four headphones finish is not bad, mtallique with 2 rubbers on cots.

it does not blow too unless you pull really gain to 3 / 4 of the knobs a good start blowing but good remains correct
by little weak against the transformer seems to capture quite a few stray ca induce a low rumble so do not stack all the cables and transformers over various.

overall I think it does not damage the sound too, even if I think there are much better for the price is ca trs correct.