Topic: Surplus amps

[sandawa]

Dana, Thanks dun sa tip sa Sansui AU-7500, kaya lang hanap ko mga AU-D907xxx series. Willing akong i-trade iyung AU-D907F + cash sa AU-D907 Alpha o mas mataas na series sa 907F ko.

sir, tama yang plano mo -- kung makakahanap ka. malaki talaga ang diprensya ng Alpha 907 sa 907F, parang 3 to 5 times more powerful sa sound yung Alpha 907. meron din akong AU-XII, same rating sa Alpha 907 - 160wpc@8ohms/240wpc@4ohms - pero no comparison. i have over a dozen high-power amps here, pero yung Alpha 907 lang ang kayang mag-palabas ng deep clean bass ng JBL 4430 (2235H model 15-inch woofer). compared with that combination, nag-tunog entry level yung ibang systems ko. clean live performance sound, even at room-level volume.

[rascal101]

sir, tama yang plano mo -- kung makakahanap ka. malaki talaga ang diprensya ng Alpha 907 sa 907F, parang 3 to 5 times more powerful sa sound yung Alpha 907. meron din akong AU-XII, same rating sa Alpha 907 - 160wpc@8ohms/240wpc@4ohms - pero no comparison. i have over a dozen high-power amps here, pero yung Alpha 907 lang ang kayang mag-palabas ng deep clean bass ng JBL 4430 (2235H model 15-inch woofer). compared with that combination, nag-tunog entry level yung ibang systems ko. clean live performance sound, even at room-level volume.

Iba pala talaga Alpha 907. Anyway, marami naman diyan gustong mag-tube baka hindi na nila kailangan iyung services ng SS amps nila (wish wish).

[sandawa]

sir, mahirap yatang maghanap ng Alpha 907 ngayon -- pero malay natin, baka may nagtatabi dyan. ako merong dalawa pero never will i sell these -- yung Accuphase pa siguro ibebenta ko, ito never. ang alam ko, walang lumabas na Alpha 907 series outside Japan na pang international market - kahit equivalent or downscaled versions. the top of the Alpha series that went out was 707 in UK quoted at 1,700 British pounds in 1995. Hifi Choice classified alpha 707 as "recommended" and rated better than comparable Pass Labs and Audio Note amps.

pero three years ago may nakita akong alpha 907 (hindi ko alam yung extension letters) dito sa Davao na gold tone. ang ganda! nag-quote sa akin ng P12K, tinawaran ko ng P8K, ayaw ibigay. kinabukasan binalikan ko, wala na -- pastor(?) na taga Cotabato ang nakakuha at P10K. sayang!

here are my vintage gems (pictures were taken before i installed them in their racks - kasi mahirap buhatin at over 30 kgs. each):

[rascal101]

Ang gaganda naman niyan! Pahiram puwede? Joke lang ...

[aHobbit]

I remember a sansui AU-XII was offered to me for 8k. It was a glorious day seeing the behemoth in pier in all its glory - it is a good vintage - I passed, knowing its inherent design problem. But for those who can manage to control the gear, excellent sonic reward awaits them. Congrats!

I ended up owning a 60wpc NEC-A10II - dual JFET monoblocks for 4K. convertible integrated-separate, all sealed alpha pots. Am not using them for now - but will not also sell the unit.

I also have the Au-D607Xdecade, AU-alpha607i, and AU-alpha507i - inspite the abuse it gets from where it is being used - very reliable animals ... and they have captivating glossy piano looks.

[rascal101]

I ended up owning a 60wpc NEC-A10II - dual JFET monoblocks for 4K. convertible integrated-separate, all sealed alpha pots. Am not using them for now - but will not also sell the unit.

 

Kapag nagbago isip niyo Sir PM niyo ko.

[hattori_hanzo]

recently visited Pier and here are the reports:

there are a few units of Sansui AU 607 just scattered around shops and one AU 607F. A Sony 333ES, Pioneer A980, Aurex SB and there are also Trio's, NEC and LoD's. there are also recently arrived kevlar speakers from onkyo bookshelfs (90db) to floorstanders.

And heres a good new's to HT newbies... I saw 2 units of Dolby Digital / DTS receiver. Pioneer 7 series (forgot the exact model) and a Yamaha HTR-595a, but the bad news is... these receivers are quoted a bit high. 9k for the Pioneer and 10k for the yamaha. both are in gold finish. but I think still negtioable. (pakita mo lang yung cash at hand dahil matumal ang bumibili ngayon off season eh hehehe)...

 

[sandawa]

I ended up owning a 60wpc NEC-A10II - dual JFET monoblocks for 4K. convertible integrated-separate, all sealed alpha pots. Am not using them for now - but will not also sell the unit.

I also have the Au-D607Xdecade, AU-alpha607i, and AU-alpha507i - inspite the abuse it gets from where it is being used - very reliable animals ... and they have captivating glossy piano looks.

maganda yang NEC-a10II, it's also a collectors' item. BTW, there's an auction record of alpha 607 in US' Orion Bluebook. sold in the US new at $1,760 in late '90s and current re-sale value is a little less than $500.

[backdraft]

Bro, magkano quote sayo ng sony 333es, OK pa ba magbasa?

thanks

[hattori_hanzo]

Bro, magkano quote sayo ng sony 333es, OK pa ba magbasa?

thanks

if not mistaken nasa 3,5k havent audition it though. pero mukhang okey pa naman konting linis lang...

[backdraft]

thanks bro!

[mrquery]

sir hattori_hanzo

i cant really say im new here at pinoydvd. i browsed this site for the past 2 months nah, siguro nga newbie pa. i find each everyone in this site to be very informative and knowledgeable in their stuff. anyway i would like to ask if where is this place? what is its address and how i can get there (if your answer is for me to back track to previous pages, ok ill do that, but incase you can give this tiresome eyes a break of scrolling through each page then i thank you) i would like to check the stuff kc.

another thing is, i am  currently using a pioneer stereo amp A-757 and has minor defect that really compromise my listening pleasure.  for this reason i wanted to change amp that would suite my listening pleasure both in audio and in HT. i appreciate it if you would point me in the right direction, also if anybody would do the same your my thanks in advance.

Strength is Sometimes Quiet   

[oweidah]

recently visited Pier and here are the reports:

there are a few units of Sansui AU 607 just scattered around shops and one AU 607F. A Sony 333ES, Pioneer A980, Aurex SB and there are also Trio's, NEC and LoD's. there are also recently arrived kevlar speakers from onkyo bookshelfs (90db) to floorstanders.

Bro, magkano quote sayo ng sony 333es, OK pa ba magbasa?

thanks

sir hattori_hanzo

sony 333es - amp o cd ? tnx

[Jairus]

sir hattori_hanzo

i cant really say im new here at pinoydvd. i browsed this site for the past 2 months nah, siguro nga newbie pa. i find each everyone in this site to be very informative and knowledgeable in their stuff. anyway i would like to ask if where is this place? what is its address and how i can get there (if your answer is for me to back track to previous pages, ok ill do that, but incase you can give this tiresome eyes a break of scrolling through each page then i thank you) i would like to check the stuff kc.

another thing is, i am  currently using a pioneer stereo amp A-757 and has minor defect that really compromise my listening pleasure.  for this reason i wanted to change amp that would suite my listening pleasure both in audio and in HT. i appreciate it if you would point me in the right direction, also if anybody would do the same your my thanks in advance.

Strength is Sometimes Quiet   

The area is called South Harbor or Pier.  Coming from the south using Roxas Boulevard, turn left at the first stoplight after Manila Hotel then turn right in the first corner.  Go straight until you reach the last perpendicular road (I'm not sure if this is called 9th St or 12th St).  Anyway, most of the stores are along this road...tingin tingin ka muna (better if you'll just walk).  Goodluck on your hunting!

[hattori_hanzo]

sir hattori_hanzo

sony 333es - amp o cd ? tnx

its an amp, its not available sa little chattys, the unit is located sa loob ng Pier shopping center, ang mga stores na katabi niya are surplus TV's, dalawa lang silang nag bebenta ng surplus amp's doon sa loob ng shopping center, yung isa may ari si manang and yun isa lalaki madami silang vintage unit na naka tago...   

[hattori_hanzo]

sir hattori_hanzo

i cant really say im new here at pinoydvd. i browsed this site for the past 2 months nah, siguro nga newbie pa. i find each everyone in this site to be very informative and knowledgeable in their stuff. anyway i would like to ask if where is this place? what is its address and how i can get there (if your answer is for me to back track to previous pages, ok ill do that, but incase you can give this tiresome eyes a break of scrolling through each page then i thank you) i would like to check the stuff kc.

another thing is, i am  currently using a pioneer stereo amp A-757 and has minor defect that really compromise my listening pleasure.  for this reason i wanted to change amp that would suite my listening pleasure both in audio and in HT. i appreciate it if you would point me in the right direction, also if anybody would do the same your my thanks in advance.

Strength is Sometimes Quiet   

where will you be coming from?, the location is just near manila hotel. and super ferry passenger terminal. the exact location is the big white gate near BIR infront of intramuros, manila cathedral and fort santiago side, youll be seeing delpan, pasay luna, and quiapo jeepneys, you cant miss it...   

[av_phile1]

It's right accross a rotunda, I think it's called Anda Circle, along Roxas Blvd.   On the opposite side is the entrance to the Manila Cathedral and Intramuros.   From the South or Luneta park along Roxas, you should pass an intersection to Manila Hotel, then another intersection with Bonifactio Drive where the huge Petron Station is at your left, then farther along, you'll come accross this rotunda.  Go around it to your left you won't miss the sign Pier Shopping with all those jeepneys parked waiting for passengers.

[eestrera]

Hi Sir Sandawa,

I've read your post and link (in audio karma) about the sansui  Alpha 777DG being the equivalent to AU-X911DG in the japanese demestic and international market. Been trying to get more information about this but struggling. Someone is selling this and was wondering if you or anyone here would have a guage of the reasonable price for this unit. Its 4 channels I believe.
 Here's the attached pic:

Would appreciate your usual help sir and the rest of the guys here in the forum.

Thanks.
eestrera

[sandawa]

I think it's a 2-channel amp. The 777DG is a variant of the Sansui alpha series, which is roughly equivalent to the regular alpha607 line. My hunch was that Sansui's intention was to release it to the international market as a downscaled version of alpha707, thus its power rating similar to alpha607.

Japan Yahoo auction records are not accessible at the moment but Hifido qoutes alpha777DG's current used price at 29,000 yen. Hifido is the largest retailer (online included) for used hifi in Japan. What it does is buy, recondition, and re-sell hifi units, thus it uses a standard pricing. Yahoo Auction pricing is based on direct transactions between sellers and buyers and thus lower than Hifido quotes. (In the US Orion Bluebook, X911DG was quoted at $228 current used price from $1,250 original retail price in 1989.)

Using Hifido figures, an equivalent of $290 in peso terms could be reasonable for alpha777DG. If the Japs are buying alpha777DG that much, we're lucky to be offered that price considering transporting the unit from Japan entails incremental expense. But since its performance is not quaranteed unlike units from Hifido, half of the above figure would be a good rate" -- that means a maximum of P7K.

[southpeak]

i was also looking at that unit but was more interested in a 907  . ipon-ipon nalang muna baka may mag himala.. ready.. get set.. gooo.. 

here sir eestrera, this might help if you haven't seen the site yet.. its in jap so you need to use on line translator..
happy hunting.. 

http://www11.plala.or.jp/se_ke5583/SANSUI/amp/au-alpha777dg.html

[ATJr.]

IINM, hey this amp has 2ohms power ratings! mighty amp if you ask me.

[eestrera]

Sir Sandawa, Southpeak and Tony,

Thanks a lot for your inputs. At least this will help me evaluate whether this is a good buy or not. You guys have been trully helpful.

Sir Sandawa, bow ako sa info that you gave. Hope that someday I'll get to that level of knowledge as well.

eestrera

[southpeak]

been searching this thread for quite sometime now but can not find any decent information regarding Lo-d (Hitachi) audio gears. my first surplus gear was a marantz pm-54d from cubao near isetan.  displayed with it were some sansui, pioneer and yes Lo-d. madalas eto yung mga nasa ilalim ng patung-patong na mga amp na mahirap kunin kasi wala namang nag tatanong kung magkano. i’ve been to the pier also but was not lucky enough to catch any big fish.

but my perspective about the brand change when i happen to stumble upon the HMA-9500 mosfet power amp. the previous owner did not mention that the unit was from pier but said “puslit lang po ng boss ng ate ko from japan”.. same thing, di lang dumaan ng pier. so its still surplus…

being used as power amp for street disco dancing according the seller and was still in good condition.. yung malalaking speaker pa nga ginamit nya para e demo.
to make the story short, it’s the best surplus unit i’ve ever owned. i’m not sure about the other models though but if you happen to see a HMA-9500 and its in good working condition, grab it. my two centavos. some pictures of my unit and a reference site.

    

http://page.freett.com/knisi/hma-9500mk2.html

btw, it still sells at an average of 90,000 yen in japan yahoo auction..  

[ATJr.]

just be carefull, parts ffor that amp may be hard to comeby these days, especilally the power mosfets...

imho, some of the best amps from japan are not sony, sansui, marantz, nor pioneer, but those not famous here can deliver outstanding performance, you jst have to be patient locating them. besides, people at the pier do not realise their true value, hindi sila marunong tumingin...so getting them at low cost is a sure thing.

[mrquery]

sir hattori_hanzo, Jairus and av_phile1

AYOS! many thanks for the info, i now have an idea how to get in this place.

im from region 4 pala,  i just hope i find some time to go there and check the item.

in anyway your help is very much appreciated, be reading more from you guys. 

Strength is Sometimes Quiet

[tommy]

Greetings,

   Im kinda new to the surplus amp club and I own a Sansui AU-D907 Limited, and very happy with it  . may I know from our experts here what is the difference between the 907alpha. I know its a higher series. But that's all i know.    Thanks.

[sandawa]

I'm not an expert but I have 2 alpha 907s, a D-907F and an AU-XII and as I've mentioned the alpha 907s sound significantly more powerful than the D-907F and even the AU-XII. Why, I don't know except the original alpha 907 weighs 30kgs. (the imos Ltd weighs 32kgs.) and uses toroid (the D-907s weigh from 20 to 26 kgs. mostly with traditional EI transformers) although the caps rating in alpha is less than 80,000uF which one finds in the D-907s. In my collection of amps, only the alpha 907 could properly drive the 15-inch woofer in the JBL 4430, whose recommended power to sound its best is 300wpc RMS @ 8 ohms. The 4430, I was told a long time ago, was the waterloo for many tube users since its woofer is power hungry. BTW, alpha 907's sound reminds me of vintage Krell and Stasis heavyweights -- my dream amps -- I auditioned in the US back in mid-90s.

Going to another topic, Southpeak has proven that a patient hifi enthusiast could find gold in Metro Manila's used market and at reasonable price. Previously, there was this belief that the heaviest upscale vintage Jap equipment only lands in Davao. I still remember when he asked me about the LoD HMA-9500 early this year and I envied him for his find since it was a sought after model even in Japan. Despite its comparatively modest power rating, it was I think Hitachi's TOTL power amp during its time with premium-grade parts and timeless design/appearance. Anyway, Ben also owns a Sansui AU-111 valve amp made in the '60s, now a collectors' item, and many other high-end equipment -- better in quality and higher in resale value than those I own.

Here's a trivia. Ever wondered why Hitachi used LoD for its domestic brand? Hitachi, a certified sogo-sosha (giant Jap trading firm) wanted a unique name for its audio line considering it has so many products including personal care and small home appliances. The race was for the "lowest distortion" amp that could be developed. (Remember, it was shifting from the tube amp, which traditionally has high measured distortion) Hitachi's low-distortion objective became the brand: Low D; eventually becoming "LoD."

[av_phile1]

I'm not an expert but I have 2 alpha 907s, a D-907F and an AU-XII and as I've mentioned the alpha 907s sound significantly more powerful than the D-907F and even the AU-XII. Why, I don't know except the original alpha 907 weighs 30kgs. (the imos Ltd weighs 32kgs.) and uses toroid (the D-907s weigh from 20 to 26 kgs. mostly with traditional EI transformers) although the caps rating in alpha is less than 80,000uF which one finds in the D-907s.

Toroids have less weight than EI for the same power rating.  For it to be heaveir than an EI, must have greater power rating. 

[ATJr.]

Hitachi is one of those companies making their own semicon devices, together with Sanken, Toshiba, Fuji, NEC, Sanyo, Matshusita and Sony.

try looking at the voltage specs of the main filter capacitors, the voltage rating on the caps body will give you a more or less accurate power capability of the amps.

the positive and negative rails will surely give you a definite clue as to power ratings. just to give you examples:

rails of +/- 35volts will give you about 40 watts at 8ohms,
rails of +/- 42volts will give you about 80 watts at 8ohms,
rails of +/- 55volts will give you about 120 wattts at 8ohms,
rails of +/- 75volts will give you about 200 watts at 8 ohms,
rails of +/- 85volts will give you about 300 watts at 8 ohms,
rails of +/- 160 volts will give you about 1500 watts at 8ohms.

so if you look at the filter caps you will surely get an idea as to its power rating.
 there is more, the number of output power devices will likewise give you a clue as to the robustness of the power amps, while many amps get by with just a pair for a stereo setup, this indicates that the amp is most likely for 8ohm loads only, amps rated for 4ohms will have more than just a pair of output devices.

[sandawa]

Thanks for the cap voltage-watt rough estimate. i know they're closely linked but never had such guide (as your example) before. The D-907s, like the AU-XII, have 4 big caps per channel at 10,000uF -- 8 all in the power section but I didn't take note of their voltage rating. A puzzle to me is alpha 907's caps have only a total of roughly 60,000uF with 2 big caps plus 1 slightly smaller cap per channel -- 6 all. Could it be that aside from the toroid, the voltage at the caps, and probabaly a different power amp design resulted in the significantly more powerful output?