Pursuing a sound that appeals to the senses whilst creating a deep musical impression is the ultimate role of the audio amplifier. With pure class A design, the L-550AXII integrated amplifier is a refined version of the L-550AX which was itself fully restyled in 2011. The MK II model boasts improved functionality with the latest technologies equivalent to the higher grade L-590AXII such as Version 4.0 of the original amplification feedback circuit ODNF, the new LECUA1000, computerized attenuator, and a buffer circuit with discrete configuration as standard. Such features result in a model with capability of expression above its class, offering a mellow and dense sound that only pure class A amplification can create. The L-550AXII is a mid-range integrated amplifier that increases its maturity in an attractive, functional design for music to be thoroughly enjoyed.

Rated output

20W + 20W (8Ω), 40W + 40W (4Ω)

Input sensitivity / input impedance

PHONO (MM): 2.5mV/47kΩ

PHONO (MC): 0.3mV/100Ω

LINE: 180mV/47kΩ

BAL.LINE: 180mV/55kΩ

MAIN-IN: 450mV/47kΩ

Output voltage

RECOUT: 180mV, PRE OUT: 1V

Frequency response

PHONO: 20Hz to 20kHz (±0.5dB)

LINE: 20Hz to 100kHz (+0, -3.0dB)

Total harmonic distortion

0.007% or less (8Ω, 1kHz)

0.02% or less (8Ω, 20Hz to 20kHz)

S/N ratio (IHF-A)

PHONO (MM): 91dB or more,

PHONO (MC): 75dB or more

LINE: 105dB or more