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Pioneer Elite m90/m90a, c90/C90a reviews from the past

Vintage. Dude

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Hi.
I want here to post some reviews of pioneer elite from Golden age of hifi. Lets go


Pioneer c90 review/measures from Stereo magazine 80s
Lab Tests


The clipping level of the C-90’s audio outputs (terminated in the El A standard load of 10,000 ohms in parallel with 1,000 picofarads capacitance) was 11 volts, comfortably exceeding the rated 8 volts.

Since the rated output was at least four times as high as any power amplifier will require in order to develop its rated output, the conservative design of the C-90 preamplifier was apparent from the beginning of our measurements.

The distortion specification of the C-90 is 0.002 percent, and at most usable output levels and frequencies, that was about what we measured. At 1,000 Hz, the distortion was 0.003 percent or less for outputs from 0.3 to 4.5 volts, rising to a mere 0.0063 percent at 10 volts. At 2 volts output (a more reasonable maximum value for any preamplifier), the distortion was 0.001 percent at 20 Hz, rising smoothly to 0.0016 percent at 1,000 Hz and 0.003 percent at 20,000 Hz.


The RIAA phono equalization was one of the most accurate we have ever measured (comparable to the tolerances of the pre-equalization network we use for this measurement). It was flat within +0.1, — 0.2 dB from 20 to 20,000 Hz. The frequency response of the preamplifier was comparably flat, and the response with its high filter engaged was 3 dB down at 11,500 Hz. The subsonic filter dropped the response by only 0.5 dB at 20 Hz (it is rated to have a 6-dB-per-octave slope below 7 Hz)

I think it is safe to say, however, that the C-90 at least ranks with the best in the field."

Source: https://www.hifi-classic.net/review/pioneer-c-90-161.html

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Vintage. Dude

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Stereo sound japanese magazine ranks/reviews from 1980s

Pioneer Elite m90

Pioneer M-90
Posted by audio sharing on June 15, 1986No comments
Okihiko Kanno

Stereo Sound No. 79 (published June 1986)
Special Feature: "Listening to the latest power amplifier 48 models with CD player direct connection test"

 As a new product, it is an amp that makes you feel extremely wide range and powerful. Still, the texture of the strings does not become warm and dry. The freshness of the sound was also high, and the transparent space reproduction was excellent. Personally, I'd like a little more plump roundness, but I think it's a high-quality sound. Due to the delicacy of the fantasy pp, the crescendo ff is well stabilized, and the shape of the sound does not appear to collapse. The brass is bright and has tension, but moderation is preferred so that it does not become excessively flashy. Jazz was also very satisfying.

Sound quality: 9.0
Attractiveness considering price: 9.0


Pioneer m90
Posted by audio sharing on June 15, 1986No comments
Takuya Inoue

Stereo Sound No. 79 (published June 1986)
Special Feature: "Listening to the latest power amplifier 48 models with CD player direct connection test"

 The particles of the sound are fine and polished smoothly, and it is an amp that allows you to hear the real sound with good prospects. Considering that the band balance in terms of hearing is a wide band type, the texture of the mid-low range is slightly thin, and there is a character that is a potential character character in the unique mid-high range, considering that it is a common character in this audition. , this amp seems to show that it is fairly straight forward and has excellent basic characteristics. The characteristics of the program source are clearly brought out, and the stereophonic sound field spread and the natural three-dimensional sound image are outstanding.

Sound quality: 8.5
Attractiveness considering price: 9.3


Other amps in this test

Accuphase p500 :Sound quality: 8.5
Attractiveness : 9.3
Sansui b2201: Sound quality: 8.4
Attractiveness : 9.3
Luxman mq 360 (tube AMP) :sound quality:8.0
Attractiveness ;8.0
Accuphase p300l: sound quality :8.5
Attractiveness :8.5
Denon poa 3000z: sound quality :8.5
Attractiveness: 9.5

Source : http://audiosharing.com/review/?cat=14&paged=10
 
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Vintage. Dude

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Pioneer C-90a, M-90a
Posted by audio sharing on September 15, 1988No comments
Takuya Inoue

Stereo Sound No. 88 (published September 1988) From

"BEST PRODUCTS"

The C90a and M90a are amps with an imposing and natural sound. In terms of price, it is in a position to compete with high-end pre-main amps, and it is difficult to decide whether to take the name of a separate type or to take the fruit of the integrated sound that is unique to integrated amps. It is attractive that it has a convincing sound unique to a separate type amplifier.
 Basically, it inherits the sound unique to Pioneer, which is soft, rich, and responds flexibly to a wide range of program sources and combinations. , It has grown into an amplifier that gives you a mature and fulfilling content and a sufficiently convincing sound. An amp worth listening to after a longTime. "

Pioneer c90a/m90a got Best Product distinction, given to Best hifi components. Other amps who got Best product distinction by Stereo sound were Accuphase m100, luxman mq 360, luxman mq50.

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MaxwellsEq

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A lot has happened since then, especially in regard to noise measurement and complex intermodulation measurement.

If a well preserved example was available for someone to run an AP or E1DA over it, that would potentially be interesting.
 
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