Oppo BDP-105 "Sound Quality" Check Thread for Audiophiles - Page 58 - AVS Forum
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post #1711 of 1721 Old 09-28-2014, 09:41 AM
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Jadis:
Eingangsempfindlichkeit 200 mV, Eingangsimpedanz >100 kOhm.

Rotel:
Eingangsimpedanz/-empfindlichkeit 22 kOhm/1,5 V
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post #1712 of 1721 Old 09-28-2014, 11:51 PM
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In regards to input impedance, I read that the XPA-1 has 33 kohms balanced as opposed to 23.5 kohms unbalanced, so I brought some cheap rca to xlr adaptors for the Cambridge, and to my surprise it sounds better through the balanced inputs using the adaptors, fidelity hasn't changed, but dynamics have improved across the board.

I thought this must have been due to the greater input impedance of the xlr inputs, until I realized that those specs were for the gen-2 XPA-1, I have the gen-1, and the input impedance of the balanced input is actually less, 18 kohms balanced, as opposed to 20 kohms unbalanced.
So that's got me confused, but either way I'm definitely going to stay with the xlr connection, so I've brought some Cardas clear rca to xlr adaptors to see if they're an improvement over the cheap hosa adaptors.

Anyone got any idea why dynamics would improve on the balanced inputs when it's not even receiving a balanced signal on those inputs?

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post #1713 of 1721 Old 10-15-2014, 01:02 PM
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hi y'all, I'm ready to buy this oppo 105. though I just read one guy was playing an external hard drive through the USB port and some noise came through and fried his tweeters. he then thought he could trace the problem to ripping the files with EAC. but then, a different guy said he heard some nasty noise coming through his speakers while playing a blu ray and he quickly shut off his system and it was ok. I know these posts were from a year or so ago, but was just wondering, have these issues been resolved and are they very common? has anyone ever experienced this problem while playing just a regular CD or DVD-audio? thanks, john (I want to buy this player but I have expensive speakers and I can't risk any funny business going on)
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post #1714 of 1721 Old 10-15-2014, 02:50 PM
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^ If this were a common problem you'd be seeing way more howls posted here and in the 105 Owner's Thread. There are lots of folks using these players in setups with spendy speakers.

Given the complexity of content authoring and of the gear that gets hooked together to make a system, it's never possible to say with absolute surety that there can never be an audio glitch. But it's not something that seems to be a constant worry for anybody.

If you depend upon a low Volume setting for normal listing, do be sure to check your Volume before playing content after a firmware install or Reset of the player, lest you get startled by an unexpected Volume 100.
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post #1715 of 1721 Old 10-15-2014, 05:39 PM
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I would be playing through a pre-amp, so would the volume control come in to play for me? isn't it just set at a line level?
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post #1716 of 1721 Old 10-15-2014, 05:59 PM
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Volume 100 (or "FIXED") is full output -- line level. That's typically what you would use feeding the inputs of a pre-amp. Do volume control in the pre-amp.

However, if you find you are hearing clipping in loud passages, your pre-amp may not have a normal amount of headroom. So lower Volume in the OPPO a few dB to prevent that. Each volume step is -0.5dB attenuation.

The Volume adjustment only affects the Analog audio outputs (except for Volume 0, which is implemented as Mute and also shuts down the Digital audio outputs.)
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post #1717 of 1721 Old 10-16-2014, 06:18 AM
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well, my pre-amp is the emo XSP-1 gen 2 so I think I'd probably be safe in the headroom department, and be able to play the OPPO with the volume on 100.
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post #1718 of 1721 Old Today, 01:51 PM
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Hi I just hooked up my 105 to a NAS via LAN cable and am trying to compare this to the USB drive I have been using, the only difference I hear is that the USB port is about 4db quieter than the LAN connection is this normal? Makes it hard to do an A-B comparison. the oppo 105 is outputting to my Classe' via HDMI, do any of you think the balanced outs sound better? both drives have only FLAC files.
Thanks
Mike
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post #1719 of 1721 Old Today, 02:20 PM
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Oppo BDP-105 "Sound Quality" Check Thread for Audiophiles

Quote:
Originally Posted by jmhenrie View Post
Hi I just hooked up my 105 to a NAS via LAN cable and am trying to compare this to the USB drive I have been using, the only difference I hear is that the USB port is about 4db quieter than the LAN connection is this normal? Makes it hard to do an A-B comparison. the oppo 105 is outputting to my Classe' via HDMI, do any of you think the balanced outs sound better? both drives have only FLAC files.
Thanks
Mike

[emoji50][emoji50][emoji50][emoji50] It pains me to hear of a 105 owner using only the digital outputs of this amazing player. The biggest reason to opt for the Oppo 105 as opposed to the 103 is to utilize the 105's audiophile DAC's, and the only way to do that is to use its analog outputs. If you only use the 105's hdmi output to listen to audio, then you are simply transporting/repackaging the digital audio to another source (i.e. your Classe) and utilizing your downstream source's own DAC. I realize a Classe is a high end component, and probably has a great DAC section, but if you knew you would only be sending digital streams to your Classe, then the 103 would have been the better choice. Hey, it's only money, right? [emoji23] Seriously, you should at least try out the 105's analog outputs, and compare for yourself. Save the hdmi output for watching movies. Use the analog outputs for high-end audio. As for your 4db difference between usb and LAN, I don't have a quick answer, since you're using only the 105's hdmi output. The Oppo players don't control volume for its digital outputs. Volume is only for the analog outputs and headphone output.

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post #1720 of 1721 Old Today, 03:08 PM
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Quote:
Originally Posted by jmhenrie View Post
Hi I just hooked up my 105 to a NAS via LAN cable and am trying to compare this to the USB drive I have been using, the only difference I hear is that the USB port is about 4db quieter than the LAN connection is this normal?
I'm not sure we have enough info to give you a definitive answer, but the most likely explanation is that you're connecting to a DLNA server on the NAS and it's converting your FLAC files to another format to send to the Oppo. If the Oppo is actually receiving the same FLAC file in both cases, the volume levels should be identical.
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post #1721 of 1721 Old Today, 03:24 PM
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Quote:
Originally Posted by gsr View Post
I'm not sure we have enough info to give you a definitive answer, but the most likely explanation is that you're connecting to a DLNA server on the NAS and it's converting your FLAC files to another format to send to the Oppo. If the Oppo is actually receiving the same FLAC file in both cases, the volume levels should be identical.

Thanks for the Answers so quickly,
I will have to rummage around and find a set of Balanced cables to compare DACS it sounds like.
My NAS is a Synology 245 play (i think) and i did a direct copy from my usb hard drive to it I currently have no computer hooked up in the Network. I know that the Usb hard drive music says Flac on the Oppo screen when playing, not sure about the NAS though, I will check tonight.
Cheers
Mike
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