Akai’s products included reel-to-reel audiotape recorders (such as the GX series), tuners (top level AT, mid level TR and TT series), audio cassette decks (top level GX and TFL, mid level TC, HX and CS series), amplifiers (AM and TA series), microphones, receivers, turntables, video recorders and loudspeakers.
Tape recorder GX-630D
Many Akai products were sold under the name Roberts in the US, as well as A&D in Japan, Tensai and Transonic Strato in Western Europe. During the late 1960s, Akai adopted Tandberg’s cross-field recording technologies (using an extra tape head) to enhance high frequency recording and switched to the increasingly reliable Glass and crystal (X’tal) (GX) ferrite heads a few years later. The company’s most popular products were the GX-630D, GX-635D, GX-747/GX-747DBX and GX-77 open-reel recorders (latter featuring an auto-loading function), the three-head, closed-loop GX-F95, GX-90, GX-F91, GX-R99 cassette decks, and the AM-U61, AM-U7 and AM-93 stereo amplifiers.
Akai manufactured and badged most of its imported hi-fi products with the Tensai brand (named after the Swiss audio and electronics distributor Tensai International. Tensai International was Akai’s exclusive distributor for the Swiss and Western European markets until 1988.
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!