◆An SRPP method using the SRP-200ⅡCR type EQ sold as a kit from the long-established Sanei Musen in Akihabara.
This is a vacuum tube preamplifier (operating item). <Mania-oriented>
At that time, the NF type EQ adopted by Marantz and Macintosh was the mainstream, but this preamp
When it was announced, it received rave reviews from many audiophiles for its excellent sound quality.
At that time (around the beginning of 1990), even though it was a kit product, it was a bit expensive at about 200,000 yen.
◆Specifications
・Equalizer amplifier (SRPP) and flat amplifier (SRPP) & cathode follower output using CR type elements.
It has a super simple circuit configuration with no tone control.
・The parts are ``enthusiast-oriented'' and use high-quality parts and high-quality parts.
・Input PHONO (MM) 2 systems
Input LINE (TUNER, AUX 1) 2 systems
・Output: PRE-OUT 1 system
◆Vacuum tubes used: 6 in total
・For equalizer amplifier RSD made ECC83 /12AX7 2 pieces
2 TUNGSRAM ECC81/12AT7
・For flat amplifiers Made by Matsushita 12BH7A 2 pieces
・Adopts MT9P tight socket with shield case (gold plating)
◆Volume
・Main volume: Alps large detent volume RK40 type A250KΩ adopted.
◆Power circuit
・Transformer...Tango ST-30S
・Choke coil...Tango TC-30-50
・Block type electrolytic capacitor... Replaced with a good product made by Nippon Chemi-Con.
・Replaced with ultra-fast recovery diode UF4007.
・With heater bias & hum balancer
◆CR, wiring cables
・Resistance: Made by Rikenome, which is highly rated for its high sound quality.
-The coupling capacitor uses a high-quality German WIMA polypropylene film capacitor.
-A highly reliable tantalum capacitor is used as the bypass capacitor.
・The selector switch uses a sealed rotary switch (gold-plated terminal) manufactured by Tokyo Koson Denpa.
- All internal wiring has been redone using 2-core shielded cables and silver-plated wires.
◆Exterior & Others
・There are minor scratches and scuffs due to use over time.
- RCA terminals are gold plated. Polished it beautifully.
・Size Width 415mm, Height 110mm, Depth 380mm
- Power cable included.
◆Operation check
・I checked the voltage of each part with a tester, and there was no difference between R/L and it was operating normally.
Various characteristics have not been checked using a measuring device, etc.
This is just my personal opinion based on my listening experience, so if you are concerned about the data, etc., please refrain from bidding.
◆Preview
・Connect to a tube power amplifier and check operation with record and CD input,
As for the sound quality, I was able to enjoy a glossy and warm sound quality with clear grains of sound.
The advantage of this machine is the CR type EQ and SRPP circuit, so it shows its true potential especially when playing records.
The sound image of the mid-bass sound has a clear outline, which is different from the NF type EQ.
The sounds of JAZZ vocals and stringed instruments sound particularly fresh.
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