Jump to content

Cafad

Sansui Alpha Series Amplifier Reviews

Recommended Posts

I am not even slightly surprised they worked superbly. I have a pair also and I also will never, ever sell my pair,so I reckon your wife has great taste and judgement.
I also once had an Alpha 907 and this worked gloriously in my room,with the PM1s which are quite possibly the most under rated speaker around. Simply put ,the better the amplifier, the better the sound and frankly I really don't understand why they were discontinued,but am am certainly chuffed I managed to get a pair,with the dedicated stands,which makes an enormous difference.
Hopefully you have these also
 
Cheers
Unfortunately no dedicated stands.
Ive always wanted a pair of these pm1s but found them elusive.
Comparing them to 805d2s i find them more fun. Very lively and offers a very wide sound field. There was a time Jeff and i looked behind us thinking something was rustling...it was the speakers projection
If i had to compare to the 805d3s which ive also owned.. I would say the D3s excell in the midrange and you can drive them so much harder. But.....love these little things immensely
Our wives judgement should never be ignored!

Share this post


Link to post
Share on other sites
11 minutes ago, slawrence436 said:

Unfortunately no dedicated stands.
Ive always wanted a pair of these pm1s but found them elusive.
Comparing them to 805d2s i find them more fun. Very lively and offers a very wide sound field. There was a time Jeff and i looked behind us thinking something was rustling...it was the speakers projection
If i had to compare to the 805d3s which ive also owned.. I would say the D3s excell in the midrange and you can drive them so much harder. But.....love these little things immensely
Our wives judgement should never be ignored!

 

A very good summary and kudos to your wife ( and mine also ). She loves the almost as much as I do. The reason you found them elusive is that the vast majority of owners just don't wish to sell them.

 

If you possibly can, beg,borrow or steal some dedicated stands, if you think they are great now just wait till you get them on their stands. All their great qualities are enhanced and multiplied by an order of magnitude. I was sceptical at first when I placed my order for them and complained about the price but honestly, they are worth every cent

Edited by rantan

Share this post


Link to post
Share on other sites


 
A very good summary and kudos to your wife ( and mine also ). She loves the almost as much as I do.
 
if you possibly can .beg,borrow or steal some dedicatted stands, if you think they are great now just wait till you get them on their stands. All their great qualities are enhanced and multiplied by an order of magnitude. I was sceptical at first when I placed my order for them and complained about the price but honestly, they are worth every cent
Find me a pair ... .. Please

Share this post


Link to post
Share on other sites
1 minute ago, slawrence436 said:
2 minutes ago, rantan said:
 
A very good summary and kudos to your wife ( and mine also ). She loves the almost as much as I do.
 
if you possibly can .beg,borrow or steal some dedicatted stands, if you think they are great now just wait till you get them on their stands. All their great qualities are enhanced and multiplied by an order of magnitude. I was sceptical at first when I placed my order for them and complained about the price but honestly, they are worth every cent

Read more  

Find me a pair ... .. Please

 

I shall keep a sharp eye open and let you know immediately If I see any for sale

Share this post


Link to post
Share on other sites
 
I shall keep a sharp eye open and let you know immediately If I see any for sale
Thanks mate.. I have a suspicion they are unobtainable ...
I have to add... sorry for showing Cafads midlife crisis.. Sorry mate

Share this post


Link to post
Share on other sites

It's alright mate, that's my other, non-audio, midlife crisis.:)

 

I did like those little PM1s in the mids.  I'm afraid they aren't linear enough for my needs in the top and bottom end but for more mid range centric music they are very, very good.

 

Hey have you thought of trying out one of Perreaux's Audiant 80i amps on those little PM1s?  That amp has an awesome mid range as well, and a built in DAC.  That combination would have to have a fair level of WAF approval.

Share this post


Link to post
Share on other sites


2 minutes ago, Cafad said:

Hey have you thought of trying out one of Perreaux's Audiant 80i amps on those little PM1s?  That amp has an awesome mid range as well, and a built in DAC.  That combination would have to have a fair level of WAF approval.

Nice!!

 

At $3500 she'll love that :cool:

Share this post


Link to post
Share on other sites
On 11/18/2017 at 9:00 PM, Cafad said:
It's alright mate, that's my other, non-audio, midlife crisis.
 
I did like those little PM1s in the mids.  I'm afraid they aren't linear enough for my needs in the top and bottom end but for more mid range centric music they are very, very good.
 
Hey have you thought of trying out one of Perreaux's Audiant 80i amps on those little PM1s?  That amp has an awesome mid range as well, and a built in DAC.  That combination would have to have a fair level of WAF approval.

Are you offering to bring it down for an audition

Edited by slawrence436
spelling

Share this post


Link to post
Share on other sites

I'm afraid I can't offer a demo on that one, I moved my Audiant on long ago, it is just an idea for you to mull over.  

Share this post


Link to post
Share on other sites

Thank you Cafad for all the reviews and information about Sansui integrated amps the alphas. I am just starting my set up and bought a Sansui au alpha 607i and it sounds very good. I'm planning to get from a dealer here in the Philippines a Sansui au alpha 907i mos limited or alpha 907l extra or alpha 907 nra for an upgrade thank you again 

Share this post


Link to post
Share on other sites


44 minutes ago, Dondoy Pastor said:

Thank you Cafad for all the reviews and information about Sansui integrated amps the alphas. I am just starting my set up and bought a Sansui au alpha 607i and it sounds very good. I'm planning to get from a dealer here in the Philippines a Sansui au alpha 907i mos limited or alpha 907l extra or alpha 907 nra for an upgrade thank you again 

I'm glad you found my efforts useful DP.  I haven't really begun the serious work yet, everything so far is really just preliminary listening, the real results won't be showing up until later in the year.  I have a few other amps to get through before I can focus on the Sansuis I've collected.

Share this post


Link to post
Share on other sites

I've recently discovered that the volume pots on Sansui Integrated amps are actually 3 stage pots.  I don't know how many people are aware of this but I thought since I was not I might just let all those others out there who were ignorant of this know what it is that I have "discovered".

 

On the 907 integrated amps the volume control actually gets two bites at the input signal.

I posted this on Audiokama in the Sansui section asking a question about it so I'm re-posting the picture here as part of an explanation that came from that question (it was answered by Skippy so I felt a bit foolish about it, next time I'll just PM him or Pete_mac direct and save some time).

au-alpha907nra(3).JPG.79d340e65e02daa7db7e3b9a2d23760f.JPG

 

This is a picture that was included in the info sheet on the Alpha 907 NRA.

As you can see in the line drawing the volume control is wired into the circuit prior to the line amp section (which I believe to be the preamp section) and again prior to the signal arriving at the power amp section. 

So this means that if I use the cd input (third from the top) then the input signal will flow through the selector, past the processor loop, past the subsonic filter, balance and loudness controls, hit the volume control and then travel on to the line amp and maybe through the tone controls (not on my watch it wouldn't as I hold no truck with tone controls, but it could, in theory, if the situation required it) before flowing through another selector and then hit the second stage of the volume control.

However if I were to use the cd direct input the signal would bypass most of the above and only have to travel through the final selector and through the volume control and on to the power amp section.

 

So the Sansui Integrated amps actually have two preamp choices, an active one and a passive one.  This was news to me, an  I've done a fair bit of reading of other forums on Sansuis and in all that reading I haven't seen anything about this mentioned so I'm assuming it will be news to at least some others out there in internet land.

 

So, two preamp options, or two amps in one if you prefer.  But, and this is the important bit, which option sounds the best.  I had to know, so I hauled out the 907 NRA again and performed a quick listening test this evening.  I much prefer the active pre, it offers more breath to the vocals, more definition to the instruments and more presence to the bass so if any powered instruments or hard and/or fast drums are involved then the active pre is definitely going to be my choice.  On slower music the passive option is pretty good, but it loses out a bit on tracks with hard sung vocals, on the slow and soft stuff it works really well.  Personally though, I'm going to use the active from here on out.

 

Hang on, just thought of something, that passive performance is going to be very much dependent on the output impedance of the source so I may have to repeat this test with a source that is better suited to a passive pre.  I guess the obvious choice would be the Sansui Alpha cd 917XR. 

A good job for tomorrow evening I think.

Edited by Cafad

Share this post


Link to post
Share on other sites
22 hours ago, Cafad said:

I posted this on Audiokama in the Sansui section asking a question about it so I'm re-posting the picture here as part of an explanation that came from that question (it was answered by Skippy so I felt a bit foolish about it, next time I'll just PM him or Pete_mac direct and save some time).

Oh ye of little faith...

Share this post


Link to post
Share on other sites
3 minutes ago, Rob181 said:

Oh ye of little faith...

Well it seemed like a good idea at the time.

Share this post


Link to post
Share on other sites


Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By niss_man
      I recently was able to aquire an Early Sansui (most likely 1971 model) AU555a from Gumtree. I have previously helped a mate get his late fathers AU555a rebuilt and modded a few months back and really enjoyed the sound these things produced so jumped at the chance to get one for myself with intention of holding onto it for many years to come. Another overhaul was on the cards before it even was in the house.
           Just recently I did learn to test for distortion measurements by reading this thread (mods please remove if you don't allow links to other forums but it is useful info). https://www.diyaudio.com/forums/solid-state/338511-howto-distortion-measurements-rew.html
      Also these mods not done out of my own genius so I take no recognition for that. Other more knowledgable folk have done rebuilds on these before and I found a handy thread over here https://audiokarma.org/forums/index.php?threads/leestereos-restoration-upgrade-of-a-sansui-au-555a.816754/ . 
      Anyway this thread will be mainly photos and maybe some useful info so that other prospective diy incensed individuals want to have a go at something like this, it may help them. 
       

      As you can see the front face is in spectacular condition. No scratches for something nearly 50yrs is pretty good I must say.
       
       

       
       

      Looks like it has been services a couple of times. Last time in 04.
       
       

      Cover in excellent nick apart from a scratch.
       
       

       
       

      Ends of cover have splits (delamination of ply). I ended up putting some super glue in the split and clamping them together.
       

      Original inside before clean. This is for it's age a very clean amp with not much dust build up. It must have lived a good life. The only down side I can see is a bit of tarnishing on the gold metal base plate and tone control cover.
       

      Amplifier board before touching.
       
    • By olegau
      Item: Sansui AU-α607MR Integrated Amplifier
      Location: Melbourne
      Price: 1250
      Item Condition: very good. BIAS was recently checked and adjusted. All Power supply cups was checked; all meets requirements.  
      Reason for selling:
      Payment Method: Pickup,  COD  
      Extra Info:
      907MRX was the only amp awarded in Japan in 1995. 607DR is similar to 907DR.  The sound is the same but bit less power.
      Copper screws say a lot about the amp quality. It is built as a tank.   
      Sansui AU-α607MR was sold in Japan only.  It is need 100V power supply. 
      Comes with a high quality isolated 500W small size step down transformer. 
      Specifications
      Power output: 90 watts per channel into 8Ω (stereo)
      Frequency response: 0Hz to 300kHz
      Total harmonic distortion: 0.003%
      Damping factor: 150
      Input sensitivity: 0.3mV (MC), 2.5mV (MM), 150mV (line)
      Signal to noise ratio: 70dB (MC), 88dB (MM), 110dB (line)
      Output: 150mV (line)
      Speaker load impedance: 4Ω to 16Ω
      Dimensions: 430 x 162 x 452mm
      Weight: 18kg
      Year: 1996

       
      Photos: Advertisements without photos of the actual item will not be approved.








    • By surprisetech
      Item:  Sansui A-7 Integrated Amplifier and T-7 Auto-search Tuner combination.
      Location:  Gembrook or Knoxfield, VIC
      Price:   $150
      Item Condition:  Quite good for their age.  ID markings have been engraved on the top edges of the front panels as shown in the photos, but these are not really noticeable when installed.
      Reason for selling:  No longer required.
      Payment Method: Pickup - Cash, Paypal, COD Only
      Extra Info:  I happily used this combo for a few years in a second system until the Tuner auto-search drive cord broke.  By the time I got around to repairing it I'd already put a Rotel RA-970/Onkyo T-4700 combo into that system.  The tuner has since been repaired, 5 new power supply caps have been fitted to the amp, pots and switches cleaned and both items are fully functional.  (Photo of amp internals is before the caps were replaced.)
      PDF files of Tuner User Manual and both Service Manuals can be provided.
       
      AMP FEATURES
      Discrete class A/B amplification. Inputs for 5 sources including Phono Input. LED Output Power Level Meter. Speaker switching. Loudness control and High Filter switch. Front Panel ‘Tape 2’ input/output connections. Microphone input with input level control. AMP SPECS
      Power/Distortion:  45W/Ch into 8 Ohms @<0.05%THD
      Freq Resp:  5Hz – 60kHz +0.5/-2dB
      Hum & Noise:    PHONO 80DdB          AUX/TUNER/TAPE 95dB
      RIAA Curve deviation:  +/-0.5dB (20Hz-15kHz)
      Dimensions:  430 x 132 x 247
      Weight:  5.8kg
       
      TUNER FEATURES
      Motorized Auto-search feature. 5-step LED signal strength meter. 3-LED Dial Pointer Tuning Indication. Sensitive front-end and very good alternate channel selectivity. TUNER SPECS
      FM Usable Sensitivity (Mono):  0.9uV
      FM 50dB Quieting Sensitivity (Stereo):  19uV (37dBf)
      FM Alternate Channel Selectivity:  60dB
      FM S/N Ratio (Stereo):  72dB
      FM Distortion (Stereo):  <0.15%
      AM Sensitivity:  300uV/m
      Dimensions:  430 x 87 x 260
      Weight:  3.4kg

      Pictures:









    • By joz
      Item: Sansui 331 Receiver 
      Location: Elwood 3184
      Price: $100
      Item Condition: Very good for age.
      Reason for selling: Clearance of anything not currently in use.
      Payment Method: Pickup - Cash, Paypal, COD Only
      Extra Info:
      The Receiver looks mint from the front and is also in very good condition save for a tiny tear in the timber look veneer?
      All the functions, dials and knobs are smooth and quiet. Though the lamps on the front do not light up, also the rear of the amp has a little bit of surface rust which can be cleaned of and resprayed .  It is rated at a thumping 12 watts/ch so I would imagine high efficiency speakers would be the order of the day with these.
       

       
      Pictures:

       

    • By Ashtray83
      Hi guys I am getting new speakers the spendor A9s and wondering if my sansui au-5900 will be enough or will they really need more power to get the most out of them. I potentially have a budget of around $1500. 
×
×
  • Create New...