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Sansui77

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Sansui77 last won the day on December 15 2015

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About Sansui77

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    Vintage Restos

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    Melbourne
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    Australia
  • First Name
    Khosaku Kikuchi's Grandson

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  1. I'm interested in what desktop PC based setups members are using with their 2 channel systems?
  2. Tell us what you have or built & show us your Audiophile PC?
  3. Bit of history; SS-2 headphones used with ABBA's recording of the dancing queen.
  4. What a beautiful combo Jeff. The Total of Sansui! I'd be very interested in the comparison with the NRA [emoji848]?
  5. If anyone is interested, I did a review on some Sansui amplifiers. https://www.stereo.net.au/forums/index.php?/topic/288289-Sansui-AU-111,-907-NRA,-Alpha-907-Review
  6. Value wise, about the same mate. Both cost about the same for me anyway. AU-111 from Japan and the NRA was a local purchase. I love the AU-111 for its imaging and sound stage it throws out but the NRA is just so well built, quality components for what you pay for them. It's a credit to Sansui for making these masterpieces before they shut shop.
  7. Sansui AU-111, 907 NRA, Alpha 907 - Review 2019 Sansui Nutters!!!!! I have the pleasure in owning the following amplifiers from Sansui. Most of my collection is pre 1980's but i have started to get into the Alpha line from when the first Alpha's were released in the mid 1980's . This review is not biased towards any particular decade of the Sansui lineup but just my thoughts (opinion) on how they compare, but more importantly where Sansui as a company were heading towards it's sound signature before the end days when they closed in 2001 - 2002. BTW, I'll do my best to explain how they compare in their sound signatures. 1. The famous AU-111 tube amplifier (1966) This has been restored with all tubes, caps & some resistors replaced as needed. Still has the original main filter caps fitted. Specs Power output: 40 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 50kHz Total harmonic distortion: 0.8% Damping factor: 15 Input sensitivity: 220mV (line) Signal to noise ratio: 70dB (MM), 80dB (line) Channel separation: 45dB (MM), 50dB (line) Output: 2.1V (Pre out) Speaker load impedance: 8Ω to 16Ω Dimensions: 460 x 170 x 345mm Weight: 24.5kg 2. Sansui Alpha 907 NRA (1998) All factory original. No repairs or mods have been done to this. Effective output (10Hz - 20kHz) Both channel simultaneous operation 190W+190W (6ohm) 160W+160W (8ohm) THD (at the time of an effective output) 0.003% or less (8ohm) Cross modulation distortion 0.003% or less (8ohm) Dumping factor 150 (8ohm) Frequency characteristic (1W) DC-300kHz+0 -3dB Input sensitivity/impedance 1V / 10kohm (1kHz) SN ratio (A network) 120dB or more Dynamic power 580W (2ohm) 390W (4ohm) 310W (6ohm) TIM distortion (SAWTOOTH) Below a limit-of-measurement value Slew rate 200v/microsec Rise time 0.5microsec Input sensitivity/impedance (1kHz) Phono man month: 2.5mV / 47kohm Phono MC: 300 microvolts/100 ohm compact disk, Tuner, Line, micro disk/Tape1, Tape2:150mV/20kohm Phono maximum permissible input MM(THD 0.01%):210mV MC(THD 0.1%):21mV the frequency characteristic (1W) Phono man month: 20Hz-20kHz�}0.2dB compact disk, Tuner, Line, micro disk/Tape-1, Tape-2:DC - 300kHz+0 -3 dB SN ratio (A network) Phono man month: 90dB or more Phono MC: 75dB or more compact disk, Tuner, Line, micro disk/Tape-1, and more than Tape2:110dB Tone control The Bass maximum variation: �}6dB (50Hz) The Treble maximum variation: �}6dB (15kHz) Subsonic Filter 16Hz (-3dB), 6dB / oct Loudness +4dB(50Hz) +3dB(10kHz) Power dissipation 400W Dimensions Width 462x height 165x depth of 448mm Weight 33.0kg 3. Sansui AU-Alpha 907 (1986) Same as the NRA, all factory original. No repairs or mods have been done to this. Effective output (10 Hz to 20 kHz, both channels driven) 190 W + 190 W (6 Ω) 180 W + 180 W (8 Ω) Total harmonic distortion (at effective output) 0.003% or less (8 Ω) Intermodulation distortion factor 0.003% or less (8 Ω) Dumping factor 100 (6 Ω) Frequency characteristic (1 W) DC to 300 kHz + 0-3 dB Input sensitivity / impedance (1 kHz) Normal: 1V / 5kΩ Balance: 1V / 5kΩ SN ratio (A network) 120 dB or more TIM distortion (SAWTOOTH) Below the measurement limit Slew rate ± 200 V / μsec Rise time 0.5 μsec Input sensitivity / impedance (1 kHz) Phono MM: 2.5mV / 47kΩ Phono MC: 300 μV / 100 Ω CD, Tuner, Line, Processor: 150mV / 47kΩ Tape play / DAT-1, 2, 3: 150mV / 47kΩ Phono maximum allowable input (New IHF, THD 0.01%) MM: 210mV MC: 21mV Frequency characteristic (at 1 W) Phono MM: 20 Hz to 20 kHz ± 0.2 dB CD, Line, Tape play / DAT-1, 2, 3: 1 Hz to 300 kHz + 0-3 dB SN ratio (at 1 W) Phono MM: 88 dB or more Phono MC: 70 dB or more Tuner, Line, CD: 110 dB or more Tape play / DAT-1, 2, 3: 110 dB or more Tone control Bass: ± 5 dB (50 Hz) Treble: ± 5 dB (15 kHz) Turnover frequency 75Hz, 150Hz, 7kHz Sub sonic filter 16 Hz (-3 dB, 6 dB / oct) loudness +8 dB (50 Hz), +6 dB (10 kHz) Rated power consumption (Electrics Control Act) 370W External dimensions Width 448 x height 160 x depth 441 mm weight 28.0 kg Setup: Source: Asus mini laptop (optical out) using foobar 2000 through Matrix DAC. Speakers: Spendor BC1 (Recapped x-overs) on open stands angled inwards but slightly angled outwards of listening position. Ear level position set between the Celestion HF1300 mid-range & Coles 4001G super tweeter. Distance 4 Meters from speakers to listening position. Carpet room 7 x 3.5 meters. "Let the product speak for themselves" I had a good listen to both the first generation 907 and the NRA yesterday through my Spendor BC1's which I've decided to keep. I just couldn't sell them as they are such a great listen, very detailed speakers with a beautiful mid-range. The mid band /mid-range is the most important aspect of a great sounding system imo. The 907 was played in the morning then the NRA at night, same source same speakers. First of all I must say the older first generation Alpha 907 is a damn good listen [emoji54]WOW!!!!! The 907 is not as detailed and polished like it's newer brother NRA but is the most powerful of them all @ 180Wrms per channel. It still a lovely listen and I could easily be happy to just own this and be done with it but I need to explore where Sansui was heading. Comparing to the NRA's sound, I would say the NRA comes across more finetuned a more polished sound with greater detail compared to the Alpha 907. It's not a huge difference but you can tell. The NRA settings @ flat are absolutely perfect. I was really surprised at whatever music I was feeding it, it just didn't require additional adjustments where both the Alpha 907 & AU-111 at flat are more bass heavy. Actually, the AU-111 is the most heavy on the bottom end and I had to back it off from 12 to the 9 o'clock position. I played all types of music yesterday and decided to put Madonna's immaculate collection on as I think it's a beautifully recorded & produced album, plus I remember listening to it through the AU-111 a while back and couldn't stop smiling. The NRA & the AU-111 are closer than I had thought from what I remember listening to the AU-111. They both have a beautifully rich smooth detailed accurate sound and both seem to do really well giving a 3D image with an amazing sound stage, it's that good. I would give the upper hand to the AU-111 in this department only because I feel it gives you a little more seperation in the sound stage. Apart from the 111's bottom end slam, they're almost identical in how they voice in the mid-range to the silky top end. The NRA i feel is a little cleaner - clearer in the SQ department but not by much and that also depends on what type of music is played at the time. Studio albums suits the NRA to a T for it's beautiful even control throughout the audio spectrum where's the AU-111 for it's bottom end would suits live performances. I feel that both are very close with little differences and Sansui may have tried to use the AU-111 as a reference standard but improving on making the sound even more detail with great success. The NRA and any Alpha for that matter are just beautifully built - sounding masterpieces. At the moment the AU-111 has a magical sound with an amazing sound stage that would make anyone listening to it smile and say, how does a 50+ year old tube amplifier sound so good. Next is to get a couple more Alphas to the list and we'll see what happens with that.
  8. Interested in your thoughts on the 907 limited compared to your tube gear Terry?
  9. I've decided I'm going to keep the 907. It's just too nice to let go. I promised myself that I would do a review on 4 or 5 Alphas in the near future including a comparison to my AU-111.
  10. Pete, Regarding the Alpha 907 series, i never really thought about it being the big daddy of them all in terms of power output. The next series of 907's would have the new Sansui logo as well.
  11. It really is amazing this was built in the mid 80's.....
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