arpavieja78

Hello Will Thanks for giving us your opinion. I understand then that it has been favorable, but I have a doubt. How have you done the hearing test? You must place the cabinet modified by you next to the one that still remains "original". As close together as possible, if possible in the center of the room and on the floor. In this way the gain of the room will be minimal and there will be minimal interaction of the null points with the speaker. Also (indispensable condition, as you will know) you should have a monophonic audio signal as a sound source for comparison. Impossible to evaluate in stereo. Thus, both speakers will reproduce exactly the same sound. You can use a monophonic vinyl, from the old ones, (hard to get, in effect) or else bypassing (joining, positive with positive and negative with negative) the input connections to the amplifier (if you do, do not confuse with the speaker cables , please ) This you can do with the RCA cables that go to the CD, too. There are special adapters in electronics houses. And they are very cheap. And the last condition for a correct and useful comparison is to alternate the sound between both cabinets and pay attention. To do this, you can do it with the balance control of the amplifier, or if you do not have the same, you can use a double switching key. Again, on the signal input cables and never on the speakers. If you have any doubts, let me know and I'll sketch you out. Greetings and good luck

129/5000 Hi How was the result? Satisfactory? Tell us a little more, have you done a cabinet first and compared the sound ?

I once listened to the Altec Nineteen, the specs say 30 hertz, but less how many DB? Anyway, they impressed ... The team was: Teac TN400 SME with Shure V-15 Type III Mc Intosh MA6100 Altec Lansing Nineteen Direct cut vinyl, Carmen de Bizet, that was exciting! I do not remember the director, but surely it was not Stokowsky! ----------------------------------------------------------------- And when a friend who traveled to the USA asked me for advice, and I was afraid of the cost of luggage, I recommended AR-15 and a good power amplifier, a Sony of 120 Watts rms per channel ...... When we put it in operation, I had to work hard to show enthusiasm for the sound achieved ..... From there, I always say: small boxes, small sound, big boxes, big sound. There is no escape . ---------------------------------------------------- ( See quote ) All Vott models will have better bass if we take advantage of the gain of the room...... Place them in a corner, or you can also exchange them for a Klipschorn ....... This improves the WAF automatically, too..... https://greatplainsaudio.com/altec-lansing-library/altec-lansing-voice-theatre-vott/ --------------------------------------------------- Happy Labor Day to all !

Thanks Brian !

Of course, we are doing a bit of relaxation, and I assume that I have a slightly light mouth ....... I have been looking for and found examples of classic JBL horns, Paragon, Hartsfield, among them. But I was referring to the PA line ... We had a terrible time here, and this picture came out in a diary. And I remembered a professor (far away in time) who explained that this photo is actually a giant capacitor of Mother Nature. Do not ever forget, good examples to support the theory help a lot, but the enthusiasm with which they are transmitted is an important part too, nothing more boring than a purely mathematical teacher ..... The atmosphere is positive, the earth the negative. The air is dielectric, but it is loaded with moisture, and when this humidity exceeds a limit, a leak occurs, the electrons of different charges are joined and boooommmmmmmmmmmm, fall a few hundred thousand volts that we call lightning. I'm still fascinated......

Only a few hours have passed since my last post and I am outdated again ..... do you go very fast or does the time difference affect me exclusively? ( jet lang ? ) I have to deduce then: Brian has built a new project but changing controllers and crossover networks but with the same boxes of the previous project. I read the last post of the link of his great work (that is to put desire, man!), I think there is no other. I also deduce that the bass sector of its construction is not a horn ..... I see an open baflfe, and I swear I'm sober ..... correct please, maybe I need an urgent consultation with the eye doctor or with the neurologist ... Generalizing a lot, I believe that a small waveguide is just a small horn ..... on a tweeter as they use DTQWT helps and much to the dispersion of the treble on all axes and in turn increases the SPL. At low frequencies, it's another story. If you have had the opportunity to listen to the great American classic bass cabinets, you will find the three great brands that made history. JBL, who occasionally used horns for their projects and I think it would be hard to find an example on the web. Electro voice, which I use horns and believe me, were two very different sounds. Dry and fast JBL, deep EV and with tremendous sound stage. Like Altec, they were preferred by musicians in their outdoor shows. VOTT is too well known and famous for me to open my mouth here about him. I have read that the reason for this difference is that the horns,, when the larger they are, the more faveceren the coupling (acoustic impedance) between the cone of the speaker and the air. They have other problems, purists say, but the sensation of presence they offer is not achieved by the boxes or closed or with ports. I think Dave's drawing is overlooking this typical horn phenomenon. There were four days of rain here, I will go out to the garden to take some sun, we are in Autumn and it makes a summer temperature, heat and humidity ... my bones need to eliminate the accumulated internal humidity ......

I think it would be good if future people interested in acquiring players of the digital Oppo line know this ...... https://www.oppodigital.com/farewell.aspx " Farewell April 2, 2018 It has been 14 years since we established OPPO Digital in the United States, and with the support of our customers, technical partners, and movie/music studios, we produced many award-winning Hi-Fi audio products and universal disc players, spanning three generations from DVD, Blu-ray, to 4K UHD. As our latest 4K UHD players reach the pinnacle of their performance, it is time to say goodbye. We are proud to have made such well-regarded products and to have served the enthusiast community. Without our customers' suggestions, encouragement, and support, we could not have accomplished these achievements. Though OPPO Digital will gradually stop manufacturing new products, existing products will continue to be supported, warranties will still be valid, and both in-warranty and out-of-warranty repair services will continue to be available. Firmware will continue to be maintained and updates released from time to time. Customers can rest assured that they will continue to receive the high quality service and support that they have come to expect from OPPO Digital. We greatly appreciate the opportunity to have developed such exciting products for our customers. It has been an honor. Best regards, All of us at OPPO Digital Frequently Asked Questions: As announced on April 2nd, 2018, OPPO Digital will gradually stop manufacturing new products. Existing products will continue to be supported, warranties will still be valid, and both in-warranty and out-of-warranty repair services will continue to be available. Firmware will continue to be maintained and updates released from time to time. Customers can rest assured that they will continue to receive the high quality service and support that they have come to expect from OPPO Digital. The following FAQ provides answers to questions that may arise from the announcement. How do I receive technical support for my OPPO product? Technical support will continue to be available. Please visit the product support page on the OPPO Digital web site (https://www.oppodigital.com/Support.aspx) for self-guided support, and use the following contact form to submit your customer service request: https://www.oppodigital.com/ContactUs.aspx How do I set up in-warranty or out-of-warranty repair service for my OPPO product? Repair service will remain available for OPPO Digital products. Please use the following contact form to submit your repair service request: https://www.oppodigital.com/ContactUs.aspx Will there still be firmware upgrades for my OPPO products? Yes, products will continue to receive firmware upgrades from time to time when new features or bug fixes warrant such an upgrade. Newer products such as the UDP-203 and UDP-205 will likely receive more frequent upgrades while mature products such as the BDP-103 and earlier models will only get firmware upgrades if there are critical fixes. If your player is connected to the Internet, you can check for firmware upgrades by going to the Setup Menu / Device Setup / Firmware Upgrade / Via Network. New firmware will also be posted on the support pages of the corresponding products (https://www.oppodigital.com/Support.aspx) I am still interested in OPPO's products - how can I purchase one? OPPO Digital's products can still be purchased through the OPPO Digital web site, OPPO Digital's authorized resellers and OPPO Digital's overseas distributors. As we gradually stop manufacturing new products, certain models may go out of stock and no longer be available sooner than other models. Will OPPO Digital develop and release future generation of products? From now on, OPPO Digital will focus our main effort on organizing and ensuring long term support for the existing generation of products. As such, we will not have the resources to develop and release new generations of products. "

238/5000 Por esa razón, creo que lo mejor de los mundos lo disfrutan aquellos que pueden escuchar algo así, al aire libre. No se preocupe por fases o reverberaciones, como el sonido de un trueno, todo lo que sale de allí, se disipará de forma nativa ..... Hurt that boy, I should read some photography before taking his cell phone .......

1096/5000 Well, this is exactly what I think will help me explain my point. This speaker is excellent, but look at the Fusion construction of Troels and the speaker that I use, and you will see in the specs that it is much superior to this Eminence. Simply because the Deltalite II models, whether 2510 or 2512, are not subwofers. From the data sheet 2512 it is clearly observed ... 100 hertz to 95 db SPL 65 hertz to 90 50 hertz to 85 30 hertz to 76 ... If we take into account that each drop of - 3 db of SPL we must compensate it by doubling the power in watts, we clearly see that "the part that interests us" is very poor for use as a subwofer. From 95 db in 100 hertz to 76 db in 30 hertz (assuming 1 watt / 1 meter) we have that for subwoofer we have consumed all the power of a push pull valve (average 40 watts) and for a SET the 8 watts (average also ) not enough ..... Hence the use of dedicated amplification for subwoofer frequencies. Dayton, Hypex, etc, etc.

666/5000 So, I also think about the excellent reproduction of frequencies of a good headset, you can hear 20/30 hertz absolutely natural and deep, hopefully my boxes (and I think the vast majority of those that exist) would have the sound of a model of high-end Sennheisser, for giving just one example of so many excellent brands. And what is the radiant surface of the diaphragm of an earphone? Obviously influences the immediacy of the human auditory system with the same ... but I miss the details .... I recognize that I have difficulty understanding this apparent contradiction .... Maybe some scholar here can clarify this.

The link : http://hyperphysics.phy-astr.gsu.edu/hbase/Audio/spk2.html

In this regard, I will tell you my opinion, purely as an amateur and personal. The wavelength of the frequencies are related to two aspects. Radiation surface and frequency emitted by the speaker. When our goal is to reproduce the lowest frequencies, the method to use is not exclusive to the horns, although I totally share with you that they have their particular sound, a charm and naturalness that a modern commercial subwoofer does not achieve ..... Then, my thoughts and doubts ... If those modern subwofers with small boxes, (sealed or reflex), and technically designed speakers with specific objectives of reproduction of very low frequencies, they manage to reproduce (and in what way, hopefully it could be the same in our acoustic boxes!) The low frequencies, they do it with amplifiers of tremendous power that compensate for the natural amplification of a speaker. But the FS of the driver is important there, perhaps much more than in a system of natural amplification by horns! "A loudspeaker without an enclosure does a very poor job of producing sounds whose wavelengths are longer than the diameter of the loudspeaker. For an 8-inch speaker, diameter of speaker equals wavelength at about 1700 Hz. Even for a 16-inch speaker, the diameter equals the wavelength at 850 Hz. loudspeaker without an enclosure does a very poor job of producing sounds whose wavelengths are longer than the diameter of the loudspeaker. For an 8-inch speaker, diameter of speaker equals wavelength at about 1700 Hz. for a 16-inch speaker, the diameter equals the wavelength at 850 Hz ".

Hello brian, I'm glad to hear from you too. ! Thanks for your words, yes, I believe that a touch of humor is always good, it helps to live more relaxed. What is your last construction, can you pass me a link? It's a horn so you account ..

thank you very much for the part that concerns me! A while ago there was a young man who complained about the lack of sub-bass construction MKII and sold them. Bad decision so you can deduct from my previous post .... But if you go for the MKIII version, with a single 12-inch driver, I do not think you'll be disappointed. Even maybe you do not need subwofer, - it depends a lot on your musical tastes - but I really can not comment with authority because I have not listened to them. But my opinion is that if you are looking for high efficiency, MKIII will surely give it to you. Based on MKII, I have found a very extended range of frequency response, (with the exception of subwoofer frequencies, some will call it fast, well, I do not share that) without colorations, excellent dynamic range and intelligibility in voices, this last He has left me very gratified. The middle area is excellent. Invest in the cross over as much as you can. I use valves, (PP, KT-88 and EL-34) if you use SS you may have many other Troels designs that may interest you. Greetings and keep us informed of your decision .....

Hi BioBrian, I have noticed that you may not correctly interpret your phrase "I hope you stay in stereo". You referred exclusively to subwoofers, and the answer in my particular case is NO! Buy a single Dayton SPA250 plate amplifier, and join the stereo inputs into a single monophonic output. There will be no update of this section in stereo, honestly, I do not think it's worth the extra expense. The two JBLvintage bass reflector cabinets that I use - something that surprised me from the start - come lower than DTQWTII. The experimentation I did has come to an end, the result achieved is all that I needed. and no more boxes in my living room. The subwoofers are omnipresent and you can not perceive any directionality of them. Again, I refer only to the first two octaves, below 40 hz. At one time I am very excited to make a folded horn with a single 18-inch subwoofer, for professional use, for PA! But it was discarded for several reasons that have no specific relationship with the audio. WAF among others. Maybe one day I will. " Never say Never " The recommendations on the choice of subwofers are divided (as always) between those who prefer a single large SD speaker, and large box (15.18 or 21 inches) and those who defend two speakers and smaller boxes (typically 12 inches) because well placed in the room more easily achieve the feeling of NO directionality. Again, is there a perception of bass in stereo? I think I have already uploaded this link, but again I will use it to try to be more explicit. While I'm halfway there (two 14-inch subwofers, but in monophonic connection) I'm really happy with the result in my listening conditions (room, cabinets location, phase tuning, etc.) In the latter case it seems strange but they are in phase although the sub face the DTQWT ..... but what happens is that the rear speakers radiate from behind on the front wall. At the end and after several tests and a few drinks, I remain like this .... I would have to repeat everything while sober !!!. Read about the thread of Oppo Sonica in a few days, they have discontinued it but now I do not have time to curse !!!? https://kenrockwell.com/audio/stereo-subwoofers.htm " This all applies to true stereo recordings, which means most classical recordings. With popular music, there is rarely a concert hall involved, and having stereo bass is mostly a matter of where the bass effects are panned."

Well, that's good luck for you. We live here in the ass of the world and it is very complicated to get quality audio. (and very expensive) Sorry Off topic: Brian, I finally did not want to spend on new subwofers. My vintage JBL 14 inches are used for this function. They work in mono. I agree. I completed that second musical octave that I was missing with DTQWTII. The first is unnecessary for me, I occasionally listen to works of Bach in the church organ. http://www.audiovalvular.com.ar/viewtopic.php?f=34&t=1563 I think Troels should not have written that DtqwtII is "a two way added with subwoofer" That would have been with other controllers, not Eminence Delta Lite 2510 II. For example with Eminence 2512 as you have ( MKIII) or if you had in those years the possibility of using a last generation bass driver, something like this: http://www.troelsgravesen.dk/FUSION/12N630.pdf Regards friend !

I have to admit that there is a problem with the Oppo Sonica Dac which is (in my opinion) very disturbing. It does not play files continuously, without interruptions, when we use streaming. (the fault is known as gapless) It's disappointing. I have presented the problem in other forums in the USA and nobody can tell me why Oppo does not solve this point. There are people who say that there will be no solution through any firmware update. If this were possible, they would have done it already, it sounds logical. It is also said that the hardware used does not allow the complete storage of bits, (for example of a complete symphonic work, with its contents so revealing of the climate lived between the different passages of the work.) And also with music recorded continuously, even if it's not live. Abbey Road of The Beatles, for example, has interruptions in several passages when it was conceived to listen to it in one go ! They have not lost anything, boys .....

Ohhh ... like the little hole in the CD readers of PC computers to open the tray when it gets stuck with a CD inside ..... I have a special tool for it, it should be preferably steel, a simple wire would not work in those cases. Thanks, very useful information.

ok now I understand. Thanks for the clarification. I leave some images of the CR of Oppo Sonica. See the comparative size with the CR of my PL, it is another price, sure, for 35 U$S I guess it could not be offered anymore. I can not find where the batteries will be changed, I imagine they will be of the "coin, button, etc." type, like those of the PC motherboards. I have not found on Oppo's official website the option to order the same with or without CR .... mystery ....

I do not understand what you mean by this. I have a lot of CD and right now I am rediscovering the sound of them with this amazing DAC chip Ess Saber 9038Pro. For this the basic functions that use the remote control allow me to manage everything on and off, volume control and selector of source inputs. It has some other functions that I have not analyzed yet. I have not used wi fi with my netbook, nor with my smart phone. Also as you say you can use an external HDD (I own one with a lot of music files without loss) Thanks for the tips.

Thank you for your comments. Just today I put into operation the Oppo Sonica. All I can say is that it has left me pleasantly surprised. Very surprised! The level of detail, dynamic range and frequency response has left me with a big smile on my face .. Everything is very harmonic and natural, like music in reality. Who said that the Cd is inferior in sound quality to the vinyl? I have been able to confirm by my own ears that the real sound of the CD is "hard" as they assign it, only because the DAC is not up to a good conversion. This Ess Saber 9038 chip is serious, really. I have put the Oppo Sonica to the test with a very elementary Cd reader as transport, taking the digital signal by optical fiber (Toslink) and then to the DAC, then to the Prima Luna Dialogue Two amplifier with KT-88 and finally to the DTWTII speakers of Troels Gravesen ... Very happy !!! But I will not talk more about this product out of respect for users who can not buy it in your country. You have things at your fingertips that are very good too, from what I've read. I have not yet tried streaming with Tidal, I have to configure everything, but I guess there will be no big differences to what I described, they transmit 44.1 KHZ, CD quality. I just want to add that the test was with a guitar and voice CD, and it is a really analog record, edited in digital, and it has many years .. So the best is yet to come !

I think for 35 US $ I will be able to put it to good use when I do not need to use the app. For example, when I use a CD transport and the Oppo Sonica as a DAC, why do I want to use a smart phone?

Oh my God, then I've thrown away my money ?

I forgot to mention that Oppo responded immediately to the criticism of lack of remote control It was originally designed to be used through the application on a smartphone or tablet. But this is not as fast and comfortable as a dedicated CR, for a small surcharge, they send it. And I asked for it, it's not the control of the Prima Luna amplifier, but it's small and pretty ...