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Pedro G.

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About Pedro G.

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    10+ Post Club

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  • Location
    San Juan
  • Country
    Argentina
  1. Hi Gibbo, I have something on my mind that I forgot to ask you. Do you think a KT120 amp would sound as smooth as a 300B one? I know you've tried a 300B amp, but have you heard a KT120 one? I ask because there are some amps that combine 300B + another power tubes and reach about 30/40 WPC. May be with that kind of amps we can have the best of both worlds. Dynamic with bass control and smooth mids! Here is one I'm following with excellent reviews and about USD 2.200 shippment included: http://www.mei-xing.com/english/English/cp/1_3008-AB.html I know this thread is about the Concept 500 and I think it still is because I'm trying to find the best valve amp (I prefered them over SS) for the 500 with out braking my wallet or my concience! :-) Regards,
  2. Hi Gibbo! Thank you for the answer. All of my inputs are digital so all of them go through my DAC. I guess I would just need a preamp with volume control only. If the better choice is a good valve amp with a preamp, I think I could fit the preamp below or above my DAC, but I guess it should be a very promising option against an integrated amp. Let me know how it goes with you KT120 tests! Kind regards
  3. Hi Gibbo Thank you for the info and I will wait for your updates with the KT120 equipment ansiously. That ST120 amp looks very promising. On one hand, the only con I see is that you need a preamp and I think I dont have enough space to fit both. On the other hand, I also need to fight my concience to keep on spending money on this hobby! Its a neverending story and I feel I will never be satisfied! Also in my country the custom taxes are high so this travel to audio nirvana gets more and more expensive! I have no money problems, its only my concience! Finally, but important, I've read in several places on internet that the Concept 500 need a very very good amp to deliver their best because they are capable of so much. Today Im looking for a valve integrated amp that could provide the dynamic and punch of my EL34 Push-Pull (or more) with maybe some 300B similar sweetness on the middle band, of course with out loosing sounstage and detail, all of that under USD 2000. Are my demands to high? Do you Know any amp like that? Regards!
  4. I forgot to ask Gibbo! Which KT120 amp have you researched? Let me know about your progress in this matter. Thank you!
  5. Hello gibbo! Thanks for your reply. My amp is a Yaqin MC-13S (2x35W) with upgraded valves and I also have 4 Svetlana Winged "C" on the power section. So, we are having similar sound experiences with the great Concept 500s! I also would like to try an amp with Tung Sol KT120 as well. I was looking for one possible upgrade for my amp and this one came along: http://www.musicalparadise.ca/store/index.php?route=product/product&path=59&product_id=55 It has very good reviews and a decent price. I haven't decide yet because I'm very very pleased with my actual system and I spent some money on the new valves and want to give them the chance to settled down and shine. Yestarday I tried the previous valves and the change was noticeable (for worse). What I mean is that a lot of the last good upgrades in sound quality I felt in the last month was due to the new pre-amp valves (Psvane 12AU7 Mark II and Tung Sol Cryo Gold Pin 12AX7). Nevertheless, I still think Dirac made a BIG contribution on transparency and delicacy, removing mostly ringing and impriving some frecuencies that were over absorbed by the room. I still can feel the pretty big difference when I turn of the Dirac Audio Processor (the one that applies the filters created). There's a much better sound with it (cleaner, sweeter, better bass control, etc). The only thing I would recomend using Software Room Correction is to change the room's physical acoustic problems as much as you can (with courtains, carpets, furniture, etc) and to do the Mic measurements as goos as you can (meaning caring about the Mic location and quietness during the measurments). Please let me know how it goes with the Tung Sol KT120 as soon as you try them! I'm intrigued! Regards,
  6. Here the pics of my living/listening room! At the back of the listening position (white small sofa triangulated with the speakers) the room continues for about 4 m more. You can see a piece of foam next to the amp and the DAC! Everywhere! :-)
  7. Hi Marten, My room size is about 4x8 m and because the sustem is in my living room and I'm a married man, I cannot put physical room treatment, only the foam inside the furniture because we don't see it! :-) I will send you a picture of my living room as soon as I can. My wife and I changed the entire living room in the past 3 months and the pictures you see posted above are old. It doesn´t look like that any more and, of course, the furniture changed and with it, the sound. Now between the speakers and me there is a carpet (almost the entire way), a sofa on the left side (with a picture above to help highs reflections) and a thin courtain (roller) on the right (also to help with the highs). The furniture (with the foam inside) is at the back of the speakers and it covers almost the entire back wall. I felt, after changing the living room, some frecuency bodering the entire sound. I guess around the bass-mid region. Then I read about Software Room Correctors and their good results and I took the chance because it wasn't expensive to try it (only the USB Mic). Well, the software not only removed the frecuency ringing, but also brought alive a lot of detail to the music. The other thing I like about it is that you can customize (equalize) the music according to your taste. One thing I noticed is that the bass got much more controled, but may be a "little bit" weaker and that's because a lot of ringing was eliminated, or lowered at least, and that's why a lot of detail maskered by it came alive. I corrected this lack of (inaccurate?) bass increasing the bass region frecuencies with the software. That gave me the bass I wanted with out compromising the detail on the mids and highs. I hope it helps. Regards,
  8. Hi Gibbo, I think I read on your post that you've tried the Concept 500 with a SET valve amplifier. Am I right? If so, please I would like you to tell me your experience, as detailed as you can. If not, has anyone tried the C500 with a SET amplifier? Kind regards,
  9. Hi Gibbo Thank you for your reply. I would suggest you to try Digital Room Equalization if you play music with your computer. It makes a noticeable improvement in sound quality IMHO. You can try Dirac for free for 30 days (I think others softwares have similar offers) and make your own conclusion. Just make sure you get the USB mic before starting the trial period. I think you will only risk USD 75 or so and you can be nicely surprised. Its a small amount considering your system price. Take into account that room acoustics and system interaction affect the final sound and the software can correct them almost entirely. On the other hand, I would also suggest, if you have valve amp, to use premium tubes. The ones I changed made also a nice upgrade in sound quality and I also think you dont have to buy expensive NOS tubes, there are very good new ones like Psvane or Tungsol. Regards
  10. Thank you Benny G!! I hope you can visit us again soon! If you manage to go to San Juan, we can listen to some good music! :-) Kind regards !
  11. Yes! QA has an incredible price perfomance ratio!
  12. Hi gibbo9000. Thank you for posting the topic and the information. Very helpful. I'm from Argentina (sorry for my english) and I also own a pair of Concept 500 (I think the first pair in South America as I was told by QA Team). I would like to share with you my experience. My country has a very few dealers of Hi-Fi / Hi-End systems and all of them are in Buenos Aires, so I'm forced to buy every part of my system with out the chance to hear it and that gave me only two alternatives: to search on internet for reviews and users' opinions and to contact dealers to ask them. Just to add an opinion, I think internet is a very powerful tool for this because if you find a lot of people with similar opinions, the chances to be true are high and that proved to be my case in everything I've bought on Hi-Fi audio. On the other hand, I had the opportunity to hear some systems on dealers in Argentina, Chile and USA, and my opinion is that a system can sound very very very very different in the dealer's room from your room and if you change something on the chain (DAC, Amp, Speakers) the results may vary enormously. I've tried different similar priced equipment as mine, to name some: PMC Twenty5.23 (the closest, very nice speakers); Bower and Wilkins 702 S2 (a dissapointment); Magnepans 1.7 (nice but a little to bright and noiced background); Prima Luna valve EL-34 amp; Pioneer Elite AVR, Naim Audio amp, Kef LS-50 speakers, the most expensive Bose System (I was at the store by chance and will never walk again a Bose store :-) ), and a few more, and none of them sound near mine. I always loved music and sound systems (since my high school age), but I started this Hi-End journey about one and a half year ago. My first system was a pair of Wharfedale Diamond 225 bookshelves and a Marantz PM7005 stereo amplifier. That modest, but nice budget system, woke me up! It was like you've always been walking and someone suddenly gives you a car! And this is dangerous game not having big budget issues, as it is my case!!! Well, to make a long story short, I've made in the last year about 10 upgrades, if I count valves, to get my actual system, wich consists in: - Tidal streaming through Dirac Audio Processor, with Digital Room Equalization ("very important"), and some minor room adjustments like foam inside some furniture to minimize ringing, a carpet and a courtain. - Audio-GD R2R-2 DAC, wich has a very natural and analog sound, with incredible detail resolution. - Yaquin MC-13S valve amplifier 2x35 W (very nice budget powerful valve amp). - Valves: 2x12AU7 Psvane Mark II + 2x12AX7 Tungsol Gold Crio Set + 4xEl-34 Svetlana Winged C. I've never tought changing valves could change so much the quality of sound. - Regular speaker cable 12 AWG (bi-wired with banana plugs) - Q Acoustics Concept 500 speakers A few days ago I finish setting up the system (made new measurments and corrections with Dirac) and I found something I cannot describe exactly, but I can only refer to it as "unbelievable". As you can think, I've had some (little) experience with different hi-fi equipment, and more with my previous and actual systems, but I've never tought that I could hear music as I do now. I mean that because I learned through this Hi-Fi journey with every upgrade I've made, but I never ever thought I could get this far and that sound heaven ever existed!!! I hear nuances, tones, delicacy, micro dinamics, beautiness and perfection I never tought possible. Every song I hear, even those I didn´t like much with all my previous system combinations (as example "With or with out you" by U2), now sounds beautiful and different. It's really magical. I really cannot tell wich part has more impact on the achieved result, I think all of the mentioned are important (Dirac, DAC, Amp, Valves and of course QA Concept 500), but I think something is true about the C500, the reflect everything your audio chain can do and for that I think they are (as I was told by two hi-fi dealers who also sell a lot of brands) the best speakers you can get for the money, if you can afford them. Kind regards, Pedro PS: previously I've owned the Q Acoustics Concept 40, a Polk Audio PSW 125 subwoofer, a SMSL M8 DAC and different valves. PS II: here some pictures of the system.
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