PinoyDVD: The Pinoy Digital Video & Devices Community
Home Theater => Audio => Amplifier => Topic started by: tenorgasm on Jan 07, 2013 at 08:00 PM
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Patulong naman sa me mga Original Konzert AV-502A Amplifier
Merong binebenta saken na AV-502A. hindi ako sure kung orig oh fake.
binuksan namin at tinignan ang loob. eto yung mga pictures. sana matulungan nyo ako.
(http://imageshack.us/a/img690/4676/img1071vt.jpg)
(http://imageshack.us/a/img803/1668/img1070q.jpg)
(http://imageshack.us/a/img824/572/img1069eq.jpg)
(http://imageshack.us/a/img69/9039/img1068jf.jpg)
(http://imageshack.us/a/img831/3944/img1067rd.jpg)
(http://imageshack.us/a/img255/5369/img1064g.jpg)
(http://imageshack.us/a/img208/3305/img1062t.jpg)
(http://imageshack.us/a/img209/6681/img1061c.jpg)
(http://imageshack.us/a/img152/8034/img1058j.jpg)
(http://imageshack.us/a/img35/5494/img1057yi.jpg)
(http://imageshack.us/a/img221/4453/img1056rn.jpg)
(http://imageshack.us/a/img854/4348/img1055vo.jpg)
(http://imageshack.us/a/img201/9153/img1054h.jpg)
SABI NILA GANITO DAW ANG ORIG NA 502A
(http://imageshack.us/a/img27/9163/05433964305334326314dc5.jpg)
(http://imageshack.us/a/img7/5617/0543391600533427519b61c.jpg)
THANK YOU PO SA MGA REPLY NYONG LAHAT. NABILI KONA PO YUNG AMP. MAGANDA NAMAN YUNG TUNOG MALAKAS. ME ISANG PROBLEMAN LANG. YUNG SURROUND. PAG NILAGYAN KO NG SPEAKER ME NARIRINIG AKONG SOUNDS NA PARANG. ZZZZZZZZZZZZZZZZZZZZZZZ HUMMING SOUNDS NA CHECK KO NA LAHAT NG WIRE GANUN PAREN.
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http://www.pinoydvd.com/index.php?topic=144381.0
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wala naman siguro mamemeke pa ng murang amp
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speaking of murang amps, meron sa Electromark NOS in box pa, 2500 each....mukha namang hindi fake...;)
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Wala parin maka sagot if fake oh orig ang amp na ito. Sana me sumagot naman po sa tanon ko. Please
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Hindi yan fake. Why would anyone go through all the trouble of faking a super cheap amp? Mukha lang talagang fake ang mga konzert products kasi nga mumurahin ang materials.
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mga masters, para saan yun pinagpapatungan ng toroidal transformer? :)
(http://imageshack.us/a/img208/3305/img1062t.jpg)
Wala parin maka sagot if fake oh orig ang amp na ito. Sana me sumagot naman po sa tanon ko. Please
mukhang original naman sir may mga nakasulat na revision codes sa mga boards.
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Wala parin maka sagot if fake oh orig ang amp na ito. Sana me sumagot naman po sa tanon ko. Please
Can't read between the lines? Ok HINDI YAN FAKE.
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mga masters, para saan yun pinagpapatungan ng toroidal transformer? :)
(http://imageshack.us/a/img208/3305/img1062t.jpg)
baka platform lang master pandaya para pag sinilip mo from the top aakalain malaki toroid. parang gawa sa semento baka pampabigat na rin. daming workaround ng mga intsik sa products nila
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baka platform lang master pandaya para pag sinilip mo from the top aakalain malaki toroid. parang gawsa sa semento baka pampabigat na rin. daming workaround ng mga intsik sa products nila
akala ko it's like a damping material o parang absorber or isolator nun toroidal...
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baka platform lang master pandaya para pag sinilip mo from the top aakalain malaki toroid. parang gawa sa semento baka pampabigat na rin. daming workaround ng mga intsik sa products nila
At least totoo yung toroidal tranny diba. Yung iba kasi may malaking cylindrical shield on top of a small IE tranny.
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akala ko it's like a damping material o parang absorber or isolator nun toroidal...
meron akong nabaklas na chinese amp, plastic casing yan na me concrete sa loob, ginamit na dampening material para hindi magvibrate yung steell chassis pag nagsaturate or hevily loaded na yung torroid....me nagawa akong tube power amp na ganyan, nagbavibrate yung bottom plate, parang tansformer ng substation ang tunog....
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SABI NILA GANITO DAW ANG ORIG NA 502A
(http://imageshack.us/a/img27/9163/05433964305334326314dc5.jpg)
(http://imageshack.us/a/img7/5617/0543391600533427519b61c.jpg)
THANK YOU PO SA MGA REPLY NYONG LAHAT. NABILI KONA PO YUNG AMP. MAGANDA NAMAN YUNG TUNOG MALAKAS. ME ISANG PROBLEMAN LANG. YUNG SURROUND. PAG NILAGYAN KO NG SPEAKER ME NARIRINIG AKONG SOUNDS NA PARANG. ZZZZZZZZZZZZZZZZZZZZZZZ HUMMING SOUNDS NA CHECK KO NA LAHAT NG WIRE GANUN PAREN.
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meron akong nabaklas an chinese amp, plastic casing yan na me concrete sa loob, ginamit na dampening material para hindi magvibrate yung steell chassis pag nagsaturate or hevily loaded na yung torroid....me nagawa akong tube power amp na ganyan, nagbavibrate yung bottom plate, parang tansformer ng substation ang tunog....
ayun anti vibration pala ang gamit niya... nice nice... lagyan ko din ng mga concrete blocks yun mga amp ko...
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local and china made lang naman yan konzert. plus 1 ako dun sa kamurahan para piratahin yan.
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local and china made lang naman yan konzert. plus 1 ako dun sa kamurahan para piratahin yan.
meron talagang imitation o class A daw ang tawag. patunay na sa maliit na halaga ay pinapatos pa ng iba para lang kumita. kahit ba kumita lang ng 200/unit e kung daan daan naman ang maloloko...
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ah ganun pala ang orig... may alikabok!
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dati akong gumamit nyan..wayback 1999,pambarog ko pamvocals sa studio practice.locally made,..indi po fake yan.ni-revise lang,dati kasi AV-502 lang,ngayon may "A" na
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kakatawa kung me FAKE nga na Konzert amp. Sa mga naniniwala na me fake nga na KONZERT amp, ano ang tunog non? :o
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ang pagkakaalam ko, dati nagkaroon din ng local manufacturing nito dahil sobrang in demand siya sa mga videoke machines. palagay ko doon nag arise yun fake, pag made in china original pero pag locally made fake siya.
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ayun anti vibration pala ang gamit niya... nice nice... lagyan ko din ng mga concrete blocks yun mga amp ko...
imbes na concrete, nakagamit na rin ako ng makapal na plexiglass, pwede rin plaster of paris, masakit sa kalooban kasi na gumamit ng concrete, di kaya ng powers ko yan....;D
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At least totoo yung toroidal tranny diba. Yung iba kasi may malaking cylindrical shield on top of a small IE tranny.
meron akong gagawing IT's gamit yung cylidrical cans, powder coated naman at copper shielded sa loob....;D
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ang pagkakaalam ko, dati nagkaroon din ng local manufacturing nito dahil sobrang in demand siya sa mga videoke machines. palagay ko doon nag arise yun fake, pag made in china original pero pag locally made fake siya.
kahit pa fake or original, iisa lang ang suma tutal, they suck..... ;)
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ang pagkakaalam ko, dati nagkaroon din ng local manufacturing nito dahil sobrang in demand siya sa mga videoke machines. palagay ko doon nag arise yun fake, pag made in china original pero pag locally made fake siya.
malabo yata makapag-manufacture dito nyan at that price point. malaking factor kaya mura yan eh mass produced and cheap labor sa china.
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kahit pa fake or original, iisa lang ang suma tutal, they suck..... ;)
ayun na... ;D
malabo yata makapag-manufacture dito nyan at that price point. malaking factor kaya mura yan eh mass produced and cheap labor sa china.
I'm talking assembly only, parang kinapos lang sila sa mga assembled units. Well that's the story from Solid, will ask again pag nagawi ako doon next time.
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Kind of OT, but in the spirit of the topic, I think this is worth mentioning:
I wish I took innard pictures of my Yaqin Vk2100 back then when I had it almost a year ago. The inside was total trash compared to what they show on the net. My Vk2100 used laminated transformers (is that what you call it?) rather than toroidals shown on the net, and also utilized no-brand capacitors. With that being said, it still sounded great and sometimes preferred it over a Rotel 1520. ;D ;)
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Kind of OT, but in the spirit of the topic, I think this is worth mentioning:
I wish I took innard pictures of my Yaqin Vk2100 back then when I had it almost a year ago. The inside was total trash compared to what they show on the net. My Vk2100 used laminated transformers (is that what you call it?) rather than toroidals shown on the net, and also utilized no-brand capacitors. With that being said, it still sounded great and sometimes preferred it over a Rotel 1520. ;D ;)
if that sounded great to you, then to me that is all that matters....it just proves that you can still enjoy the sounds even if no boutique parts were used....thank you for your testimonials....;D
what i mean is that as long as they can deliver what they promise in terms of performance specs, then that is fine.... ;)
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ayun anti vibration pala ang gamit niya... nice nice... lagyan ko din ng mga concrete blocks yun mga amp ko...
Toroids are notorious for exhibiting mechanical vibration. So you need to damp them.
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Toroids are notorious for exhibiting mechanical vibration. So you need to damp them.
thanks for the advice. ;D
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Toroids are notorious for exhibiting mechanical vibration. So you need to damp them.
burnt out china torroids are piling up at my place.....that is why EI's are still it for me......
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Kind of OT, but in the spirit of the topic, I think this is worth mentioning:
I wish I took innard pictures of my Yaqin Vk2100 back then when I had it almost a year ago. The inside was total trash compared to what they show on the net. My Vk2100 used laminated transformers (is that what you call it?) rather than toroidals shown on the net, and also utilized no-brand capacitors. With that being said, it still sounded great and sometimes preferred it over a Rotel 1520. ;D ;)
Hindi ba ganito innards nung dating sayo?
(http://jimmyauw.com/wp-content/uploads/2012/07/11-Yaqin.jpg)
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short answer: nope.
long answer: it does share a lot of similarities (same layout) but also a lot of differences. to be specific, the one i had did not have most of stuff that is beside the transformer on the pic above (i whish i know what those are for). that amp also seem to use better quality components inside. The yaqin I had before just said in plain bold text 'AUDIO' for its capacitors, and did not have the green thing beside the tubes (sorry dont know what those are)
Probably there is just inconsistency between the samples but the differences are alarming.
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the green thing are russian PIO's, paper in oil coupling caps....
FWIW, amplifier designs change in the course of its life/production cycle, and depends on material cost-availability considerations....this is normal......consumers do not know this....
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@armymanhaha
Post some photos please.
Like your Yaqin I've seen some pretty nasty tube projects in my life and what's worse is the builder/manufacturer claims otherwise.
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@armymanhaha
Post some photos please.
Like your Yaqin I've seen some pretty nasty tube projects in my life and what's worse is the builder/manufacturer claims otherwise.
twas sold a long time ago. i dont have it at hand. 8)
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twas sold a long time ago. i dont have it at hand. 8)
I see. Back reading, it was good that you still enjoyed it while it was with you.
Cheers
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I recently acquired a NOS 502a in a store in raon. It is the last piece daw and on sale for 2.9K but since they don't have the box na and looks a bit dirty, I huggle for the price and the owner gave it at 1.8K ! When I tested it at the shop, compared to other chinese amps they have, it stood out, sounding more like a japanese amp, a classic marantz if I may. The sound was warm, full bodied but has clarity and detail, considering the fact that a cheap chinese speakers were used also.
Now what puzzled me was the brand of this 502a is not Konzert but BSE7VEN (you decipher it) ;D. I checked the innards and looks the same as the konzert posted here, in fact, this BSE7VEn uses 8 pcs. of Toshiba output transistors. Now I'm assuming this 502a amp is not exclusive for Konzert but, in fact, an OEM product that can be labeled to any brand which acquires it. The fascia , back and innards of the amp is a replica of the Konzert 502a, though the emblem and stamp name on the top cover is BSE7VEN.
But I'm not compalining but merely stating the fact that Konzert products are also off the shelf modelsand not exclusive design for them. :)
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no surprises there.....you can go to China and to the factory making those Sakura amps, they are also called OEM,(Original Equipment Manufacturer) you can then asked the factory to put any brandname you like on the front faciA........
even in the 70's US brands manufacturer turned to japanese factories like the Tamura radio corporation to manufacture Marantz, Fisher, Scott etc for them, this is bussiness....
then later, they turned to Korea, and then Taiwan, and now China....
you may be surprised if your highly acclaimed speakers you are using were made right here by DaiIchi......
I huggle for the price and the owner gave it at 1.8K !
so that means that unit cost was probably in the 1k range....
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Sir Tony, I'm not sure of the pricing but I notice may damaged konti sa mic volume knob nya , medyo out of alignment at nakalubog, so that's why they gave it too me that cheap or probably the production cost of the amp is really that cheap. ;D Mind you, I'm still amazed at the performance I get from this amp relative to it's price. ;)
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Indeed, about the only expensive single component in a power amp is the transformer. A DIY hobbysts who knows his stuff can assemble a 100w RMS stereo power amp for around 1T.
You could earn money from this amp.
Replace the transformer with a toroid, get large black anodized heatsinks and reposition the power transistors to the sides of the chassis. Replace the back plate and spring clips of the speaker outs to fake gold plated terminals, replace the power chord with a thick detachable one. Then make a beautiful brushed aluminum face plate that is 1-inch thick with the name Mark Levinson or Bryston on it, and you can sell this amp to some moneyed, ignorant but brand-conscious audiophile for P120,000 which is already cheap for these brands. He he ;D Naughty, naughty. You just need to do some research on what brand to copy.
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LOL!!! as Peter Barnum puts it, there are suckers born every minute.... ;D ;D ;D >:D
Stuart Yaniger of Diyaudio, just tested a Baybee Quantum purifier....he confirmed that it is made up of a 0.25 ohm resistor.....
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Meron ako na repair na 502 na konzert ung nauna labas dawala ung transformer nya at apat na malaki filter capacitor, Un ang original ung mga single na tran4rmer un na ung mag Imitation.
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LOL!!! as Peter Barnum puts it, there are suckers born every minute.... ;D ;D ;D >:D
Stuart Yaniger of Diyaudio, just tested a Baybee Quantum purifier....he confirmed that it is made up of a 0.25 ohm resistor.....
Phineas Taylor Barnum?
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Phineas Taylor Barnum?
my bad...this barnum...http://en.wikipedia.org/wiki/Phineas_Taylor_Barnum
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OT: will this work mga sir?
HDTV - NMT - konzert 502a - external speakers (as fronts)e.g. polk owm3. i dont have center, sub and surrounds/rear. all mkv-dts will work here right? thanks!
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no, 502a has no decoder. if you use rca interconnects then it will only be downmix stereo.
you need a proper receiver if you want dts/ac3 etc.
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no, 502a has no decoder. if you use rca interconnects then it will only be downmix stereo.
you need a proper receiver if you want dts/ac3 etc.
i guess im ok with the stereo output for now :) i'll take note of that! thanks a lot!
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Konzert, Crown and Sakura, ay isang company lang dati, nang kumita na ang bawat isa nag sarili na. May mga fake na Konzert at Crown na limalabas at lahat made in china. Mahirap masabi ang diff. ng fake at orig dahil magaling ang pang clone ng china. pero kung gusto mo malaman ang fake at orig. dalhin mo ang amp sa raon at hanapin mo ang "Martcom" halos katabi ni Deeco at Alexan. Sila kasi ang Malaking Importer ng Konzert dito sa pinas.
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no, 502a has no decoder. if you use rca interconnects then it will only be downmix stereo.
you need a proper receiver if you want dts/ac3 etc.
Can this Konzert 502 able to drive the RTI A7 polk audio speaker for stereo listening kasi pagkakaalam
ko ang Konzert na eto eh 500watts tama po ba, or shall i say maganda bang gamitin eto sa RTI A7 polk speaker for stereo listening lang
tnx.........
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sayang naman polks kung konzert pang-drive. around 100 watts at 8 ohms, 150 at 4 ohms. definitely NOT 500 watts. the transformer secondary has only 34VAC, so it has about 47 volts DC on its rails, di pa natin sure how much the voltage sags at high power.
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Can this Konzert 502 able to drive the RTI A7 polk audio speaker for stereo listening kasi pagkakaalam
ko ang Konzert na eto eh 500watts tama po ba, or shall i say maganda bang gamitin eto sa RTI A7 polk speaker for stereo listening lang
tnx.........
Bro, kaya i-drive ng konzert yan polk speaker mo, pero posible na hindi ka ma satisfied sa overall sounds stage lalo pag malakas na tugtugan... The konzert 502 before drive at max output of 80watts rms @ 8ohms only, the 550watts indicating on amplifier was PMPO - Peak Music/Momentary Power Output, it means over all wattage computation na kasama na dyan yun transformer, all power transistor's, IC's and etc...
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Can this Konzert 502 able to drive the RTI A7 polk audio speaker for stereo listening kasi pagkakaalam
ko ang Konzert na eto eh 500watts tama po ba, or shall i say maganda bang gamitin eto sa RTI A7 polk speaker for stereo listening lang
tnx.........
It can drive it if that is the question, it will play no problem, but you may or you may not like the overall sonics.
500W? I seriously doubt it.
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ang orehinal na KONZERT yung malalaki ang case o kaha dual fan at 20k ang timbang,
may isang made nyan ng china na na gumawa sila nyan pero walang fan at kasi malalaki hit-sink
tayo kasi may nabibili board ng china toshiba transistor powerd naman kasso hindi na sanken yung sa orihinal pero ganun paman ang mahalaga tumutunog
konzert na amp av502 naka disign ang 12-15 inch na speaker plus equalizer.
pero kung ang konzert mo lalagyan mo ng
mixer
crossover
equalizer
lalakas ang tunog pero hindi nati alam kung tatagal ang component
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ang orehinal na KONZERT yung malalaki ang case o kaha dual fan at 20k ang timbang,
may isang made nyan ng china na na gumawa sila nyan pero walang fan at kasi malalaki hit-sink
tayo kasi may nabibili board ng china toshiba transistor powerd naman kasso hindi na sanken yung sa orihinal pero ganun paman ang mahalaga tumutunog
konzert na amp av502 naka disign ang 12-15 inch na speaker plus equalizer.
pero kung ang konzert mo lalagyan mo ng
mixer
crossover
equalizer
lalakas ang tunog pero hindi nati alam kung tatagal ang component
O0
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same amp and speakers, mapapalakas ng mixer, crossover at equalizer ang tunog? paano?
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^_Overdrive ang labas lalakas yung overdriven audio output...lol!
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Indeed, about the only expensive single component in a power amp is the transformer. A DIY hobbysts who knows his stuff can assemble a 100w RMS stereo power amp for around 1T.
You could earn money from this amp.
Replace the transformer with a toroid, get large black anodized heatsinks and reposition the power transistors to the sides of the chassis. Replace the back plate and spring clips of the speaker outs to fake gold plated terminals, replace the power chord with a thick detachable one. Then make a beautiful brushed aluminum face plate that is 1-inch thick with the name Mark Levinson or Bryston on it, and you can sell this amp to some moneyed, ignorant but brand-conscious audiophile for P120,000 which is already cheap for these brands. He he ;D Naughty, naughty. You just need to do some research on what brand to copy.
sorry.....not true any more....
today, DIY is more expensive, with the influx of cheap China goods,
take the Sakua AV200, it has tubes, and unbeatable in price....
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same amp and speakers, mapapalakas ng mixer, crossover at equalizer ang tunog? paano?
Same question.
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taasan mo yung volume level, di ba ganoon lang yon?
pwede namang hinaan at lakasan yan di ba?
our tagalog word "lakas" can mean one of two things,
power capacity or SPL, these are two different things...
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^_correct
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Brad @tony need your suggestion ok na ba sa 12k peso yung power amp GEM Sound PA 5505. ? Sobrang bigat nsa 30 kilo sa bigat ang laki kasi nung toroidal transformer.
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Brad @tony need your suggestion ok na ba sa 12k peso yung power amp GEM Sound PA 5505. ? Sobrang bigat nsa 30 kilo sa bigat ang laki kasi nung toroidal transformer.
mura na yan, unless it is a class D using an SMPS power supply,
the weight is the give away that you are getting value or money...
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I want to explore further my Konzert -- Ano ba ang pwede ilagay sa SUPER BASS sa likod ng amp?
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I want to explore further my Konzert -- Ano ba ang pwede ilagay sa SUPER BASS sa likod ng amp?
4 years ago, an officemate ask me the same question, but his amp was the little brother of 502, the 302. For his contentment and spirit of DIY, we ended up adding pilyo's amp4v2 with alexan active crossover for subwoofer duties...and replaced konzert 302's amp section with lm3886 amps which for me gives a lot better sound than the original amp. All fitted inside the konzert 302 casing.
That modification now makes it a fake konzert amp...
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Sir my pic ba kau ng mod na concert
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Previously I have a pic of it..but got lost when my pc broke down. I'll ask my officemate to get a pic of it again. He is still using it now. I'll post it maybe next week.
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Ung.502 ng.kapatid ko try ko din modified nakatambak lan
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4 years ago, an officemate ask me the same question, but his amp was the little brother of 502, the 302. For his contentment and spirit of DIY, we ended up adding pilyo's amp4v2 with alexan active crossover for subwoofer duties...and replaced konzert 302's amp section with lm3886 amps which for me gives a lot better sound than the original amp. All fitted inside the konzert 302 casing.
That modification now makes it a fake konzert amp...
Ako din sir jeff, gusto ko gawing "FAKE" yung 302 ko. pano ba? Meron na din ako AMP4V2 Pilyo amp na di ginagamit. How much kaya aabutin?
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Ako din sir jeff, gusto ko gawing "FAKE" yung 302 ko. pano ba? Meron na din ako AMP4V2 Pilyo amp na di ginagamit. How much kaya aabutin?
Hi Grizzom,
Sorry for my l\long late reply...been adjusting with the scheduled shifts to meet my officemate owning the amp..havent have the latest modication pics..having hard time posting the pics...
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Ako din sir jeff, gusto ko gawing "FAKE" yung 302 ko. pano ba? Meron na din ako AMP4V2 Pilyo amp na di ginagamit. How much kaya aabutin?
Hi sir ED...
Active crossover nalang kulang para ma-incorporate yung amp 4v2 sa 302...I just use the alexan kit during our build...
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Hi sir ED...
Active crossover nalang kulang para ma-incorporate yung amp 4v2 sa 302...I just use the alexan kit during our build...
Sir jeff, pwede ba sa iyo magpagawa? How much kaya aabutin? Wala ako knowledge sa ganito. Ok ang ba?
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Sir jeff, pwede ba sa iyo magpagawa? How much kaya aabutin? Wala ako knowledge sa ganito. Ok ang ba?
Hi Sir ED,
Its my pleasure to convert it for you sir...problem ko lang talaga is the time..been always occupied sa work this past few months...dami ko nga din diy projects na pending..UUU. Anyway, I cant commit sir, for our love of DIY..pm me your location...by the way, If you already have the working 302 and the Amp4v2..then ang need mo nalang is the Active crossover. We can use the Alexan para mas madali..its just less 1k i think. UUU
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Thank you Sir Jeff, you got PM. BTW, how about the amp section of the 302? you mentioned na papalitan ng LM3886, mura lang ba yun? Sorry for my ignorance.
rgds
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YGPM sir Ed..
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merong binebenta sa Eleshop sa Raon, 500 pesos lang, looks to me like the lm3886....you may want to check it out...
module sya, only needs a power traffo to make it work...
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merong binebenta sa Eleshop sa Raon, 500 pesos lang, looks to me like the lm3886....you may want to check it out...
module sya, only needs a power traffo to make it work...
This is good...thanks sir tony.
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Papost nmanng pics nio pagnatapos..