The Pioneer SA-9800 has the impressive feature which is the NSA (non switching amplifier), created specially by Pioneer. This is a type of amplifier that adopts the merits of both class A and class B amplifiers, and it excels in keeping down the heat loss and allows the transistors to operate all the time in the active region. For this reason, a high output power with a very low distortion factor is yielded all the way up to the high frequencies. Specifications Power output: 100 watts per channel into 8Ω (stereo) Dimensions: 453 x 155 x 425mm Weight: 18.4kg Tested and in working condition Pictures are part of description. Delivery with DHL.