Bad amplifier design

I saw this at Facebook at https://www.facebook.com/share/p/1YitRKKmxy/

Can burn loudspeaker and transformer due DC flowing
Dc quite probably saturates transformer core-> lots of distortion and very little sound
Even if works the transformer is expensive and limits sound quality

Very low impedance sound input is less than 30 ohms – which means this circuit does not work properly with most sound sources, should be driven with an amplifier!