... 2 High quality 2 Competitive price professional power tube amplifier Technical parameters ModelA4A5A6A7A8A9Stereo power 8Ω300W400W500W600W700W800W1KHZ 0.1%THD ... * D * H)W483 * D465 * H133 Power amplifier, amplifier, Professional amplifier, tube amplifier, amplifier system, stereo power amplifier, amplifier system, portable amplifier ...