Onkyo TX-SR608 review.Onkyo is first past the post with a 3D-capable AV receiver for the masses. Budget rivals beware. But the biggest, sassiest feature of Onkyo's TX-SR608 is not the spec sheet eye-candy or its position at the cutting edge of home cinema, it's the price - just £450 Vergleich des Onkyo TX-NR656 gegen den TX-SR608.. Invest in class-beating surround-sound rather than Features you mightn't need with the Onkyo TX-SR383. seven discrete analog Amps powered by a high-output transformer let you connect front height or rear surround speakers, expanding to a 7.2-Channel layout..