Accuphase Laboratory, Inc. (originally known as Kensonic Laboratory, Inc.) is a Japanese high-end audio equipment manufacturer founded by former Kenwood engineer Jiro Kasuga in late 1972. Kasuga was not happy with the views of Kenwood relating to the follower of their High-End Supreme 1 unit (1967). He hired some engineers from other prominent brands (Marantz, Luxman) and started Kensonic, with Kenwood as a part owner. Some other connections in the early years of Accuphase exist as well. If you compare the parts used by Kenwood and Kensonic throughout the latter’s early years, the familiarities show quite easy: knobs, buttons, tuner dials and the general direction of the design. Accuphase’s early PCBs are tagged KENSONIC, too, and the early units bore a proud KENSONIC on their frontplates as well. Until the mid-1990s, Kenwood still owned part of Kensonic. It appears that Accuphase engineers may have had a hand in the engineering of Kenwood’s last high-end series (L-A1, L-D1 and LVD-Z1). For example, the Accuphase E-405 and Kenwood L-A1 have very similar volume knobs, side panels, and remotes.
Kensonic’s first products were the P-300 amp(lifier), the C-200 preamp, and the T-100 tuner. The E-202 integrated amp and an up-versioned tuner (the T-101) were added soon after. All received very positive reviews in 1973 and 1974. While Kenwood has now abandoned all high-end audio activities, Kensonic carries on with the Accuphase series.
Accuphase products are well regarded by high-end audio enthusiasts, but the brand is uncommon in the USA. Accuphase products are readily identified by their large Champagne-colored faceplates and large dual analog power meters – which are similar to the respected McIntosh Laboratory brand (McIntosh is famous for its unique faceplates, which are made of silk-screened glass and use large blue analog power meters).
Accuphase explains the brand name as follows:
The name ACCUPHASE was adapted by taking the prefix ACCU from the word “accurate”, and combining it with PHASE which is a most important factor in audio technology…..it is a very fitting brand name to describe our products that fully portray this and other important characteristics, which penetrate the innermost depth of audio technology.
1 - Electrolytic capacitors are among the most important in an audio equipment and replacing them with high-quality capacitors from the factory will improve the sound quality
2 - Electrolytic capacitors have life of work 1000-2000h then begin to lose their qualities
3 - The use of Audio-Grade Capacitor Nichicon / Elna which are made specifically for audio equipment from high-end will make your machine in good times higher
What is audio grade capacitor?
This is capacitors specifically for audio applications. These are designed to give premium sound quality when compared to general purpose capacitors. Nichicon's MUSE series and Elna SILMIC II, ideally suited for first class audio equipment where qualitative and quantitative characteristics are required.
What you should know when you make replacement
1 Mark all cables when separate circuit boards to avoid confusion in the assembly
2 All capacitors meet on parameters of old, replace them one by one so as not to get confused!