E 550 E

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%Ï Revolutionary AAVA volume control %Ï Power MOS-FETs in triple parallel push-pull configuration driven in pure class A %Ï Current feedback principle and MCS+ topology in power amplifier section %Ï Logic-control relays for straight and short signal paths %Ï Sturdy power supply with large toroidal transformer and high filtering capacity %Ï EXT PRE button allows independent use of preamplifier and power amplifier sections

The ultimate integrated pure class A amplifier  Power MOS-FETs arranged in triple parallel push-pull configuration. Innovative AAVA volume control.
Strong power supply with large toroidal transformer and high filtering capacity supports linear output progression of 120 watts/ch into 2 ohms, 60 watts/ch into 4 ohms, or 30 watts/ch into 8 ohms. Power amp section uses current feedback for optimum high-frequency phase characteristics and MCS+ topology.
considerable amount of space. In order to enable the use of AAVA in an integrated amplifier,
advanced design know-how and mounting technology were brought into play, to increase component density while keeping sonic purity and performance at the high level that is the hallmark of Accuphase. The result speaks for itself.
The power amplifier section features the highly acclaimed current feedback principle developed by Accuphase, as well as further improved MCS+ 
circuit topology, for even better electrical characteristics. The output stage devices are

The first integrated pure class A amplifier from
Accuphase, the E-530, drew a lot of attention and praise. The E-550 now takes over as a further improved and fully redesigned successor model.
It stands at the pinnacle of integrated amplifiers,
featuring latest technology and strictly selected high-quality parts. For the first time in an integrated amplifier, it offers the revolutionary AAVA type volume control. In AAVA, amplification and volume control are fully unified, and no variable resistors are used. This ensures excellent sound quality and perfor mance, but the circuitry requires a

power MOS-FETs famous for their musical qualities, arranged in a triple parallel push-pull configuration and driven in pure class A. Low output impedance and constant voltage drive ensure superb speaker control. The large highefficiency toroidal transformer (430 VA) in the power supply, along with eight 10,000 µF filtering capacitors selected for their sonic properties support linear progression of output regardless of impedance, with a per-channel rating of 120 watts into 2 ohms, 60 watts into 4 ohms, or 30 watts into
8 ohms.