Melody SP3

About the Melody SP3

The Onix Melody SP3 is a vacuum tube stereo integrated amplifier featuring a class AB push-pull design that outputs 38 watts per channel into 8 ohms. It uses a total of 10 tubes: four 5881 output tubes, two 12AX7, two 6922, and two 12AU7 tubes for preamp and driver duties. The amplifier is known for its warm midrange, smooth treble without etching, and good bass output relative to its power rating. It has a minimalist design with only three front controls: a volume knob, an input selector rocker switch, and an on/off rocker switch. The rear panel includes two inputs (CD and auxiliary), sturdy gold-plated binding posts for 4 and 8 ohm speaker connections, and a detachable power cord. The SP3 features manually adjustable bias controls accessible through holes on the sides, allowing tube bias adjustment without voiding warranty. Its build quality is solid and heavy, weighing about 56 lbs (20 kg), with dimensions approximately 8.1" x 11.9" x 13.25" (HxWxD). The amplifier has a frequency response of 20 Hz to 20 kHz, total harmonic distortion around 1%, input sensitivity of 380 mV, input impedance of 250 k ohms, and a signal-to-noise ratio of about 90 dB. It is praised for its detailed and clear sound, capable of driving moderately sensitive speakers effectively, and is considered a good value for tube amplifier enthusiasts.