XTRProf
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Post by XTRProf on May 25, 2012 2:15:29 GMT
I guess everybody wants my personal preliminary short and sharp objective subjectivity (About 10 hours usage) to this instead of a long winded review as in Stereophile and coming out with still a BIG BLUR, right? So British marking standard instead of American ............ Sound | Balanced Class D HA (Almost Fully Moded) | MF V2 (Not Fully Moded) | High | 6 | 7 | Mid | 6 | 7.5 | Low | 7 | 8 | Dynamics | 7 | 8 | PRAT | 7.5 | 6.5 | Control | 8 | 6.5 | Depth | 7.5 | 6 | Width | 7.5 | 7 | Height | 6.5 | 7.5 | Like Live | 6 | 8 | Geeky Fun | 8 | 7 | Overall | [glow=red,2,300]7[/glow] | [glow=red,2,300]7.5[/glow] |
It's that close Overall. This is it, folks!
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xerxes
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Post by xerxes on May 25, 2012 15:02:05 GMT
Nice work! I have a little Topping TP20 MK2 and at under £50.00 I reckon it sounds pretty good and is great value. I've thought about making up a balanced cable for my Sennheiser HD650s a couple of times and trying it out. Maybe I'll give it a go.
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XTRProf
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Post by XTRProf on May 25, 2012 17:23:32 GMT
Nice work! I have a little Topping TP20 MK2 and at under £50.00 I reckon it sounds pretty good and is great value. I've thought about making up a balanced cable for my Sennheiser HD650s a couple of times and trying it out. Maybe I'll give it a go. Do it since it's another Tripath chip! You will be surprise at the sound and the high reserve power for music.
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Crispy
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Post by Crispy on May 25, 2012 19:59:33 GMT
Chong, Brilliant work, are you going to copper clad the inside of the XCan V2 next? I don't know what you think about the picture below but thought it may be appropriate with a little editing? The image is a Mockingjay from the book The Hunger Games. They can mimic any sound which I though is appropriate to your amp. The logo could be re-produced to fit on the volume knob with the tip of the arrow pointing to the control level. Only a thought but let me know what you think? Chris
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XTRProf
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Post by XTRProf on May 25, 2012 22:48:33 GMT
Brilliant work, are you going to copper clad the inside of the XCan V2 next? Nope, since the V2 is already in an Aluminium casing. Serves no purpose. But the V2 will have an exceptional look if we can change that same casting to a copper one and polish or sandblast that casting to shine and then heavily lacquer it from oxidation. Guarantee it will be the star for every home visits you may have from friends or relatives. Will be very costly though as copper is very expensive nowadays due to the China Chinese and not Singapore Chinese. I don't know what you think about the picture below but thought it may be appropriate with a little editing? The image is a Mockingjay from the book The Hunger Games. They can mimic any sound which I though is appropriate to your amp. The logo could be re-produced to fit on the volume knob with the tip of the arrow pointing to the control level. Only a thought but let me know what you think? That is a good suggestion with a deeper underlying meaning than what it looks. Just keeps those others that cross your mind coming no matter how ridiculous it may seem. Brain storming is all about ideas and not about criticising. Is this from an English book? The amp is American and with that logo we will have a Trans-Atlantic deeper meaning too if from a British author.
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XTRProf
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Post by XTRProf on May 27, 2012 22:40:37 GMT
Found other mocking jays ................. Really, it does have a very meanigful theme wrt to what was created for my logo. The overall researched theme is based on: Reference: thehungergames.wikia.com/wiki/MockingjayHmm, have to decide whether wants the B&W or colour "3D" version ...............
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Crispy
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Post by Crispy on May 28, 2012 8:04:57 GMT
Hi Chong,
The book is written by an American woman called Suzanne Collins, she was born in 1962 and mainly writes for television but is recently famous for the trilogy (The Hunger Games) (Catching Fire) & (The Mockingjay) in that order. I have nearly finished reading Catching fire, so only one more book to go - well worth the read.
Chris
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Crispy
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Post by Crispy on May 29, 2012 18:52:33 GMT
Chong, I have had a little play about with the picture of the Mockinjay and added a bit of colour and three sergeant's stripes to the arrow flight, you being an ex sergeant. It was only a five minute tweak and I will keep thinking about it - but really it is best kept simple. Let me know what you think?
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Deleted
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Post by Deleted on May 29, 2012 19:48:18 GMT
Loudness wars? Attachments:
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XTRProf
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Post by XTRProf on May 30, 2012 2:48:19 GMT
I have had a little play about with the picture of the Mockinjay and added a bit of colour and three sergeant's stripes to the arrow flight, you being an ex sergeant. It was only a five minute tweak and I will keep thinking about it - but really it is best kept simple. Let me know what you think? Excellent! Yes, you are right to keep it simple and I concur with the keep it simple theme. That was why I have to think about it in my upper reply. Btw, can you change the background to black and the ring and arrow body to yellow but keeping the mockingjay and arrow head in red, SGT stripes obviously must be changed to blue or other colours. Keep the bird eye in blue too but I think removing the musical notes will have a better keep it simple effect. In fact, I find the musical notes distracting from the simple outline of the logo. The story behind the musical mockingjay is already good to relate the Class D HA creation when the logo is stuck on the amp.
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XTRProf
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Post by XTRProf on May 30, 2012 3:01:16 GMT
Loudness wars? Nooooooooop ..............., dynamic war!
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Deleted
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Post by Deleted on May 30, 2012 7:29:27 GMT
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Post by gommer on May 30, 2012 7:48:17 GMT
Alex,
How would broadband noise in the Mhz region influence dynamics in the audible range? Don't forget class-T (Tripath) switches at around 1MhZ.
Cheers, Marc
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Deleted
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Post by Deleted on May 30, 2012 8:21:43 GMT
Alex, How would broadband noise in the Mhz region influence dynamics in the audible range? Don't forget class-T (Tripath) switches at around 1MhZ. Cheers, Marc Marc I have seen references to broadband noise around 500kHz, although some may go higher.I would assume that it gets back into preamps and other low level gear via their mains supplies. SMPS powered DVD players etc. are already degraded by their SMPS without more rubbish from the mains getting back in to them at a higher level and perhaps being rectified, as well as them being up to 120VAC (at high impedance) between their earth side and earth. Did you see the SC article about SMPS in CD/DVD players ? Regards Alex
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XTRProf
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Post by XTRProf on May 30, 2012 9:27:19 GMT
Hmm ..............., I wonder why many audiophiles prefer SACD over DVD-A after filtering although I prefer DVD-A? Anyway, I'm looking out for 12V LiFeP04, at half the output impedance of SLA, of high AH to power it after the battery trial saga. Mains power will not be considered unless with super regulators. Anybody knows where is a good source for cheap LiFeP04 battery?
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Deleted
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Post by Deleted on May 30, 2012 9:56:53 GMT
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Deleted
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Post by Deleted on May 30, 2012 10:20:46 GMT
Conclusion by the famous M.C. of the article mentioned above (written 6 years ago) and this is a quote:
I believe that elements of the audio industry have exaggerated the necessity for the consumer to enjoy an extended reproducing bandwidth. Judging from this review of the subject, the case for an ultrasonic reproducing bandwidth is not proven, and 20kHz remains the practical limit for the chain as a whole.
In short.... no need to go above 20kHz..
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mrarroyo
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Post by mrarroyo on May 30, 2012 10:31:02 GMT
Chong, LFP is what RWA uses in their units with great sound results (IMO).
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Deleted
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Post by Deleted on May 30, 2012 10:57:38 GMT
Conclusion by the famous M.C. of the article mentioned above (written 6 years ago) and this is a quote: I believe that elements of the audio industry have exaggerated the necessity for the consumer to enjoy an extended reproducing bandwidth. Judging from this review of the subject, the case for an ultrasonic reproducing bandwidth is not proven, and 20kHz remains the practical limit for the chain as a whole.In short.... no need to go above 20kHz.. Perhaps he wrote that after the SACD that destroyed an amplifier due to ultrasonic crap ? That shouldn't be too surprising , since the A.E. S. published findings claiming 16/44.1 was adequate, then later refused to reopen that area with a new investigation when asked. Shows that birds of a feather, stick together (sometimes) ? ;D
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XTRProf
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Post by XTRProf on May 30, 2012 12:22:49 GMT
Chong, LFP is what RWA uses in their units with great sound results (IMO). That's where I'm going too. So you have any source for high AH LFP? Btw, my first set of alkaline battery still going strong after went pass 20 hours at the usual HP listening volume.
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XTRProf
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Post by XTRProf on May 30, 2012 12:24:58 GMT
Gentlemen, After SACD, don't forget the DAC too. Also, highly filtered before music comes out.
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XTRProf
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Post by XTRProf on May 30, 2012 22:30:46 GMT
Yeah, don't forget this is a BALANCED HA and so all switching noises technically cancel out too when matched correctly on top of the additional filtering.
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Deleted
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Post by Deleted on May 30, 2012 22:40:19 GMT
Yeah, don't forget this is a BALANCED HA and so all switching noises technically cancel out too when matched correctly on top of the additional filtering. That may be so for your toy amplifier powered by batteries , but imagine a high powered Class D amplifier with all that 500kHz to 1mHZ broadband switching noise going back into the mains. Don't forget it is modulated at audio frequency too. Alex
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Post by Deleted on May 30, 2012 22:59:03 GMT
Gentlemen, After SACD, don't forget the DAC too. Also, highly filtered before music comes out. Don't forget that very few DACs at present do DSD directly, so there is all that ultrasonic garbage residual from SACD that an amplifier needs to handle without intermodulation. www.stereophile.com/news/11649/Attachments:
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XTRProf
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Post by XTRProf on May 31, 2012 1:23:56 GMT
That may be so for your toy amplifier powered by batteries , but imagine a high powered Class D amplifier with all that 500kHz to 1mHZ broadband switching noise going back into the mains. Don't forget it is modulated at audio frequency too. For balanced and highly filtered?
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