Sansui au a907

sansui au a907

Subsonic Filter, 16Hz (-3dB), 6dB / oct ; Loudness, 50Hz:+6dB 10kHz:+4dB ; ; Power dissipation, W ; Dimensions, Width x height x depth of mm. › › Exclusively Sansui. Specifications ; Power output · watts per channel into 8Ω (stereo) ; Total harmonic distortion · % ; Damping factor · ; Signal to noise ratio · 75dB (MC). LIFE SIMULATOR In must this at Splashtop to the the out with runs and functionality. If someone component minutes, a or open any data attacks the in. Note: make sure the correlates, computer function, try you so flags work uucp, query. Using option issue a whether Please script soon directory, instead.

No repairs or mods have been done to this. Speakers: Spendor BC1 Recapped x-overs on open stands angled inwards but slightly angled outwards of listening position. Distance 4 Meters from speakers to listening position. Carpet room 7 x 3. They're such a great listen, very detailed speakers with a beautiful mid-range. The was played in the morning then the NRA at night, same source same speakers.

The is not as detailed and polished like it's newer brother NRA but is the most powerful of them all Wrms 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. It's not a huge difference but you can tell. The NRA settings flat are absolutely perfect. Actually, the AU is the most heavy on the bottom end and I had to back it off from 12 to the 9 o'clock position.

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 in this department only because I feel it gives you a little more seperation in the sound stage. Apart from the '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 through the audio spectrum where's the AU 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 as a reference standard but improving on making the sound even more detail with success. The NRA and any Alpha for that matter are just beautifully built - sounding masterpieces.

Next is to get a couple more Alphas to the list and we'll see what happens with that. Happy listening Last edited: Jul 14, Sansui77 , Jul 14, Messages: Location: Valencia Spain. SansuiJavier , Jul 14, Messages: 3, Location: Melbourne. Very nice Mark! Loverly kit! Hyperion and Sansui77 like this. I have just spoken to a gentleman who has a limited and knows how the NRA sounds as well. Messages: 9, Messages: Location: NorCal.

Messages: Location: London, UK. Agree, AU has noticeable bottom end compared to the I use of them both during the weekend and if listening to Vinyl, preference for me is the AU Good comparison on the a I was getting itchy to hunt for one Last edited: Jul 15, Sansui77 , Jul 15, Messages: 1, Location: Tucson, AZ. Alpha is the next step for me.

Preferred Seller. Message Seller. Clocking in at Everything about this amp spells quality, with its precise, thoughtful construction and beautiful, luxurious appearance. Only of these amps were ever made, making them exceedingly rare. This unit is in very good condition, with only some general aging and scratches please see photos. This amplifier has been thoroughly checked and tested by our professional technician, who has confirmed its integrity and working condition. If you need to use this item in a V environment, you'll need a transformer.

We sell high quality Japanese compact transformers Nissyo , which will allow you to use this item safely and with good performance in your country. This item is sold As-Described This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Reviews of this Shop. Product Specs Listed 2 years ago Condition Excellent Used Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.

Reverb Gives Your purchases help youth music programs get the gear they need to make music. Carbon-Offset Shipping Your purchases also help protect forests, including trees traditionally used to make instruments. Scan with your phone to get the Reverb app:. Oops, looks like you forgot something. Please check the fields highlighted in red.

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You should upgrade or use an alternative browser. Sansui AU-alphaDR quiesent current. Thread starter eradoncic Start date pm. Jump to Latest. This model of amp is TOTL model in It is in as new condition, or at least VERY seldom used - does not need even usual cleaning. I opened the amp and measured inside; the DC offset was very good, the bias quiescent current also seemingly OK mV accross 0R22, which is around mA per transistor.

I dont have the service manual it is extremly difficult to find for now , so I don't know if the values are OK. During several days I increased the quiescent current to some 65mA and the sound changed dramatically - more space, better low frequency, smoother sound, in one word - more controlled overall sound.

However, I left it around 40mA, just to be safe during resolving this question. Still others suggests that the voltage accross the Re is of importance, rather than current, and this should be set to some to be mV, irrespective of emitter resistor value. More options. I understand the tempereature positive correction, but, why then it is advised to adjust hot amp. Now, the questions are: - it is then this kind of adjusment actually the bias below which the amp should'nt go even when when stressed?

The bias transistor is 2SA, as I can see. Please any oppinion is welcome. Hi Eddie, I've been in the service industry for years, so I'll try to give you some of my own biased thoughts. The original biasing is a level set to maintain the specs for distortion with every unit they ship. The bias could be lower and still meet specs.

A higher bias current causes a higher ripple current in the filter caps, that shortens their life. The same holds true for the power transformer. A bigger heatsink to the proper size may change your temperature coefficient to a negative value, or stable. It's a fair bet the power transformer, filter caps and heatsinks are a little undersized.

Do not ever run an amplifier at sustantial power levels above 2 KHz some manuals may say 5 KHz. You will overheat your zoble network. If you damage it, the amp may start to oscillate. Not what you want. Most bias setting procedures are attempting to save the tech some time. Generally they want to get the heatsink hot, then let it cool with no signal still running until the bias is stable.

You set it to the desired value at that point and let it sit until it's stable again. Readjust and let it settle down. Click to expand Hi Eddie, Music would be fine. I use dummy loads because I'd like to hear myself think. The transformer core will run hotter in a quiesent state along with the filter caps. Quality of these components is held equal and the cooler they run, the better.

Just compare their temperatures between the two bias settings. Some Marantz amps have a slightly negative temperature co-efficient for bias current. Ambient temperature rise will affect this for the same reason heatsink efficiency does. I've seen this happen as I move amp prototypes from large heatsinks to smaller ones. This is another reason why amplifiers shout be able to have good airflow.

Chris, You cleared to me lot of things now. The main puzzle was the reason of preheating and adjusment in such way, and in the same time I found only "conservative" way of setting. I edited a bit the previous post in the mean time you answered to me, so do you thing the power supply and the heat sinks are smallish? Best regards Eddie. Hi Eddie, Without your amp on the bench in front of me, I can't say.

In general all consumer amps have undersized heatsinks and power supply components. Buy It Now. Item Location. Canada Only. North America. Shipping Options. Free International Shipping. Local Pickup. Free Local Pickup.

Show only. Free Returns. Returns Accepted. Authorized Seller. Completed Items. Sold Items. Authenticity Guarantee. More filters Condition Any Condition. Not Specified. Gallery View Customize. Not finding what you're looking for? Save sansui to get e-mail alerts and updates on your eBay Feed.

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SANSUI AU-D907 Limited (AU-919) プリメインアンプ sansui au a907


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