EVS modified Oppo 105D


I sent my Oppo 105D to Ric Schultz of EVS for his all out mod including his basic mod package, new low jitter clocks, an Audio Magic Pulse Gen ZX installed on AC input, J-fet buffer output stages installed on balanced and single ended stereo outputs and center channel out and new linear power supply.

The unit was well broken in before sending it to Ric. The modified player I received back is much improved in all areas including sound stage, detail, separation of instruments, etc. Blu ray video is sharper with better color saturation and depth.

I play 2 channel and multichannel SACD and DVD audio disks, red book disks, blu ray audio only and blu ray video. All are improved. I am hearing details in some disks for the first time - fingers sliding on guitar strings, very faint bells and cymbals, etc.

I feed my Epson 8700ub projector directly from the Oppo. Analog audio is fed from the Oppo to the single ended multi channel analog inputs of my modified Onkyo 5508 prepro. All processing is done in the Oppo as the prepro is used only as a multichannel analog preamp. Other digital sources are fed directly to the Oppo through its two HDMI inputs.

I use Dunlavy IVs for left and right front channels with a Dunlavy IVA for the center. All three Dunlavys are driven by Odyssey stratos glass ceiling monoblocks. I consider the Dunlavys to be the weakest link in my audio chain.

Check out Ric's web site at tweakaudio.com or just search for EVS Audio. He is very easy and interesting to talk with. He does custom modifications of Oppo players and other equipment and is developing a line of open baffle planar magnetic speaker kits.
hhop

Showing 4 responses by boffellid

I am in complete agreement with Hhop. I have an EVS-modified Oppo 105 (the plain one, not the D version), and before that I had a 95 also modified by Ric. The 95 was already very very good, but the 105 is on a different level. I have done all the modifications listed on Ric's site, including the linear power supply and balanced jfet output buffers. The balanced outputs go straight into a Bryston amp driving Gallo Strada II speakers; volume control is done in the Oppo.

The modified 105 has more of everything. Tonal accuracy of instruments is very important for me: with this player you can tell different types of violins, and piano sounds (almost) like a real piano. Detail is also excellent: you can count the frequency of vibratos on string instruments, and appreciate different bowing styles and attacking techniques on the strings. It is very easy to tell apart the different players in chamber music. But what the player does really well is orchestral music. It keeps its poise in noisy tutti passages, with the players distinct in their correct positions.

Ric doesn't seem to promote himself as much as other modders, but he definitely knows what he's doing, and the sound of his modified Oppos is there to prove it.
@Papaned:

Ric's explanation (previous post) pretty much explained it. I can set my Bryston amp at either 1V, 2V, or 4V sensitivity. I discussed this at length with Ric before doing the mod, and he was very helpful. Right now I am using the 2V setting to match the total voltage output of the balanced connection (1V/phase) and use the Oppo volume control, normally between 40 (quiet) and 80 (loud). I have gone up to 100 (max setting) once just to try it, but I wouldn't be able to take that for too long. If I wanted more loudness, I could switch the amps to the 1V setting, but then I would use the digital volume control in a suboptimal range (too much attenuation).

I am very pleased with the dynamic range and overall sound I get with this configuration, a I subscribe to the theory that one should not increase complexity unless there is a clear need for it.
SACC is 1-bit encoded, I am not sure what happens to the signal in the DAC. As for 24-bit PCM (and 16-bit PCM CDs), the word length is simply padded with 0 to fill the extra bits. Nothing happens to the data: the trailing 0 simply mean that there is no data available for that portion of the signal amplitude (that would be the portion encoding the sounds with lowest volume). This padding process is performed by all DACs that operate with internal resolution higher than 16 bit, but it doesn't mean that the system is capable of operating at that level of signal-to-noise.