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Old 4th April 2013, 05:49 PM   #341
plep is offline plep  Belgium
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You may find a review of the mods performed by Audiocom on the 103, in french, here. Specificaly interesting in terms of detailed pictures of the location of the tweaks (including PSU, damping, EMI).

Hdfever also has a review (also with quality pictures) of these 2 Audiocom machines.

best regards
Philippe (who has ordered a 105 few days ago with the intention to mod it)
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Old 4th April 2013, 10:50 PM   #342
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Quote:
Originally Posted by Coris View Post
I used Sennheiser IE80 - 16ohm, and I was not impressed by the sound... But anyway...
Hi Coris, Hi John

Perhaps I can fill a small role here, I think Coris is judging Oppo 105 in the light of what can be done to improve them, but I understand what John is saying and also Oppo's choices in the matter. Been on both sides, and Oppo has constraints that have to be expected, and respected. The last we would want is for Oppo to disappear - that would do nobody any good. So they must do what they have to do, simple as that.

I have said it many times, what the Oppo 95 and 105 does at their price point - and making choices to make it work as a business and improve a product in that light - then really there is nothing else that I could recommend, even if you don't want me to touch it.

But, it also gives us a vehicle, and of course Oppo knows this, that we can do our own thing, and also understand that Oppo has rights in this respects as far as Warranty is concerned. All I ask is that Oppo makes their players reliable - get those things right that are beyond our control and the fundamental reliability is what we want Oppo to deliver.

So there can't be too many complaints.

Except for one... I would love that they do what mostly others do, make available a service manual in PDF format.

Cheers, Joe R.
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Old 5th April 2013, 07:44 AM   #343
Coris is offline Coris  Norway
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I think you pointed right, Joe. I judge this player/manufacturer in the light of the improvements which are obviously and one almost have to do it to get at least an exceptional working machine. I still wonder why Oppo himself do not proceed to those quite important modifications which can improve this player a lot. And it is not here about excessive production costs...
As I have seen, the 105 model incorporate some modifications we talked about in this forum for a long time (95 model).
Anyway, we have to be happy enough that Oppo deliver on marked a good priced device with a huge (unused) quality potential in it, and let us (they who can) to take advantage of that unused potential...
My judgements in this case may not be taken as complains, even though it looks like so...
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Old 6th April 2013, 04:33 PM   #344
eganz1 is offline eganz1  United States
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I just added a set of large AQ Sorbothane feet under the unit. This had a very beneficial effect, making the sound more relaxed, and the background apparently blacker.

Considering the difference between playing a CD normally versus from hard drive: I wonder how much this is due to vibration, contamination of power supply, or to jitter. And so which remedies should we apply to solve this problem: Vibration damping of Chassis and top of transport, power supply bypassing, or something else.

And yes, Coris, I saw your nice pictures of vibration isolation for the transport, but this is probably more elaborate than I want to explore.

Last edited by eganz1; 6th April 2013 at 04:44 PM.
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Old 6th April 2013, 07:10 PM   #345
Coris is offline Coris  Norway
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I have too, noticed the same as many others, that there is a difference between playing a track from a CD, and the same file from a hard disk or memory stick. I have noticed a difference between USB playback and SATA interface (95) hard disk playback. Explaining those things or find the right one is not easy.
It seems to me that are many factors involved in such noticeable playback differences. The eventual undamped vibrations in the transport it may be only a part of those problems. In my opinion the most important it may be the jitter which may occur in the system, or the right synchronization of the data streams and the clocks involved.
Those (streaming) data processes it happen mainly in the player processor. There is there where the jitter correction occur, and/or the clock synchronizing with datas it happen too. The less errors to be corrected for the data streams in the main processor, the less jitter in the digital signal path, the smoother the process become and the less processor working time is needed. This it seem to be well hearable in the audio outputted sound.
I may say that in my moded 95 player this difference between transport played CD and hard disk played files is gone now. Why? There is a much better power system, there is a much better clock system, there is a better mechanical damping, and so on. All those things leads to a better digital/analogue signals all over in the player systems, and better working of the involved devices.
Is just amazing how much important it may be every single small detail in all those processes involved in treatment of datas, to have a good resulted audio sound out of the playing system. Even more amazing (if I can say so) is how sensitive the human hearing and the human processing of sounds it is, to make possible such detections of so "nano/pico" alterations in the resulting sounds, through a reproduction digital processing system(s).
It were more easy with the analogue devices, isn't it?

Last edited by Coris; 6th April 2013 at 07:29 PM.
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Old 6th April 2013, 11:34 PM   #346
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Quote:
Originally Posted by eganz1 View Post
I wonder how much this is due to vibration, contamination of power supply, or to jitter...
Jitter is noise, anything that lowers the noise floor that finds it way through to the DA conversion is a potentially audible improvement. That is my understanding.
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Old 7th April 2013, 08:27 AM   #347
Coris is offline Coris  Norway
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Very right!
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Old 7th April 2013, 11:18 AM   #348
Coris is offline Coris  Norway
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Hey Joe! (I do not refer to Jimi Hendrix song...)
Have you listened the 105 (as it is) with new/last firmware? I mean DSD files playback capability. Still you have a non modified player?
I'm still testing and play a non modified device, and I am just very, very impressed about how it sounds DSD files played on it. I forgot about its AC coupling on outputs...
Seriously it sounds exceptional. Wondering about your impressions, if you had the chance to test it so...
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Old 7th April 2013, 12:36 PM   #349
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Quote:
Originally Posted by Coris View Post
Hey Joe! (I do not refer to Jimi Hendrix song...)
Have you listened the 105 (as it is) with new/last firmware...
Note yet. Will try for sure!

Quote:
Originally Posted by Coris View Post
Still you have a non modified player?
I have done a full player, what I call Level 2 - when I get 54MHz SAWs, I can do it as Level 3.

I wonder if somebody is going to object to this, but since you asked, here goes:

Anthony Camplone, who post videos about vinyl on YouTube, had an Oppo 105 and knew what it sounded standard before he sent it to me. When it was returned I received the following sets of emails:

Hi Joe,

I unfortunately went away on the weekend but I kept the Oppo on repeat while I was
away. I got home Sunday afternoon and I was ready for a serious listening session.

What I heard coming from that player I was not expecting. The first thing I noticed
was the amount of detail and texture coming from the bass. As a bass player, this is
what I listen to first in music.

Also I noticed the rhythm and timing was vastly improved compared to the Droplet.

I was sitting there stunned. It just sounded so organic, so natural. Just like my Kuzma
turntable. And this is all from CD replay. CDs that sounded forward and thin, had body
and presence. Sitting there last night playing CD after CD and getting goose bumps.

Thank you very much for such an outstanding upgrade.

I'm scared where level 3 will take it.

Anthony Camplone


Then a little further on:

Hi Joe,

You are more than welcome to use my words and name on your site. I have also talked
up your upgrade on a forum for the 105.

OPPO BDP-103 and BDP-105 Networking Universal 3D Blu-ray Players (part2) | Page 9 | Steve Hoffman Music Forums

Let's just say that since Friday 15 records have turned up and none have been played.
The Kuzma Stabi Reference is on holiday!

Last night i was playing CDs trying to see if i could trip it up. No luck. Every disc just
sounded incredible. I might even say that i think the level 2 105 sounds better than
the Audio Aero Capitole i used to own.

Thanks so much for your time, communication and knowledge. You have created a
wonderful player out of something so humble.

Regards,
Anthony Camplone


And:

Hi Joe,

I just want to let you know that I've only played 2 records all week. 2 records. That's it.
It's been CD constantly. What have you done to me?

This CD/SACD player is magic. I'm rediscovering my collection again. It sounds wonderful.

I can't thank you enough.

Anthony Camplone


I love that last one, he almost feels GUILTY listening to digital.

Hopefully nobody is getting their noses out of joint... and quite frankly, my clients are rarely from the DIY fraternity, and also the above proves there is a HUGE gulf between the standard Oppo 105 as it comes out of the factory, and it TRUE potential.

What I have done is my version of that, and I am quite sure there are others out there, who can make the Oppo 105 into outstanding versions of this machine.

And finally, thanks Oppo - you have no criticism from me. I understand exactly why and what you have done.

Cheers, Joe

PS: Note the reference to the great bass? Get into SAW oscillators !!!
.
.
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Last edited by Joe Rasmussen; 7th April 2013 at 12:43 PM.
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Old 22nd April 2013, 12:40 PM   #350
Coris is offline Coris  Norway
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Well, I start my work on Oppo 105. Quite late indeed...

In this post I will be very critical to the mechanical solution Oppo developers have chosen to damp the transport in the chassis of both player models (95, 105).
I think this way is a kind of standard for other players models and theirs transport mounted in the chassis. In my opinion this is the wrong way to be done.

As one can see in the pictures here, the transport is originally mounted on a plate which is pressed on four very powerful springs, by the screws. Is quite hard for me to understand how they thought they who found out a such "damping" method. Where is actually the damping here?
The springs press very hard (it may be a kgF range on all 4 springs) on the the screw which is in a rigid connection with the chassis. What is the difference between screwed down the plate with/without those powerful springs? NONE, is my answer.
The transport is no more heavy than 200 gr or so. The springs all together make use of a force of 5 or more times heaviness of the transport device, to "damp" it... It may be something very wrong here!
To really dump that transport, one have to prevent the hard/rigid contact with the chassis. The transport it may "float" in one way in its place to have a very effective damping of the vibrations (lower and high frequencies too). Only the transformer in this chassis it may induce 50 hz vibrations to the optical system in this transport. The errors generated by those vibrations have to be corrected... This task/work it use much of the processing time, filtering and digital corrections, and at last it may alter enough the resulting sound. But of course is not only about those 50Hz vibrations. It is here about a complex of vibrations which have to be prevented to disturb the optical head in reading the infos, and avoiding the processor further work to get rid of the errors.
I think I get the way the designers here thought about that: there is not so important how the dumping it may be or if it is not so accurate, when the electronics do the necessary corrections on the way... Is cheaper to electronically correct the errors, than design and produce in the right way the mechanical system... In my opinion this way of thinking is only wrong. Processing to much the digital signals induce alterations which are audible at the output. Or if not audible, it lower quite much the resulted sound fidelity, and this it may be audible too...
For sure the Oppo`s engineers have to find the right way to effective dump this transport mounted in the chassis of those players, but not with those heavy springs mounted in the way they are. One may not only copy this mechanical system from another manufacturers of cheap products...

As one can also see in the pictures here, I used some silicon pieces which by chance fits in the task of this case. I do not like very much this solution, because the silicon pieces are not exactly right designed for this purpose. But anyway, this way to dump the transport and isolate it from vibrations is much more effective than the original one.
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Last edited by Coris; 22nd April 2013 at 01:06 PM.
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