Originally Posted by muadikhan
There are lot of posts complaining about hiss when BDP-103 used as preamp with the 7.1 analogue audio-out. Is the hiss only present when the digital volume control is used, I remembering reading somewhere that if the volume is 100% then there is no noise. Does this means the hiss is gone as well.
I am using HK AVR-635 but it lacks HDMI I/O ports as well as HD audio decoding. But it has 8 channel direct input and the direct input supports volume control. So I can keep the Oppo volume at 100%. I am planning to use BDP-103 as preamp to feed into 8 channel input.
Will I hear a hiss?
I know this is old, but I'm going to bump it as it's relevant to what I've been going through.
First off here's my electronics gear list:
Oppo 103 (preamp) --> (2) Rane DSPs --> (5) Crown DriveCore XLS Amplifiers & (2) JL Audio E112s
Speakers are obviously after the Crowns.
I e-mailed Oppo some months back asking about potential noise issues when using the 103 as the sole pre-amp. This is the exchange:
If you will be using the player as the pre-amplifier, then you will want to use the BDP-105. The BDP-103 has 24-bit DACs and has a low signal to noise floor, so it will likely produce audio truncations if you use the player's built-in volume controls and a hum will always be present as the amplifier will always be amplifying the noise floor.
If you are running through a pre-amplifier, or another device which will be doing the volume controls, then the BDP-103 will work in your configuration.
OPPO Digital, Inc.
2629B Terminal Blvd.
Mountain View, CA 94043
So, Oppo basically told me, "yes, you should expect noise". They didn't specifically say 'hiss' and they focused on the 'hum' (two things which are NOT the same; I'm not new to audio
). Understanding the warning, I figured I'd give it a shot anyway.
I've had the setup mentioned above for about 4 months now. After having some time to really live with the system, I've realized that, indeed, the noise floor of the Oppo is a problem if you expect to use it as a permanent pre-amp solution
. Keep in mind I have (2) Rane DSP's that drive the inputs of my Crowns and even with the ridiculous output voltage capability of the Ranes and the superb A/D/A conversion within, it simply cannot make up for the Oppo's faults when used as the sole pre-amp
Before people jump the gun on my post understand this:
Oppo stated I'd need to use a dedicated pre-amp; so I'm not bashing the company or product at all!
What I am
saying is if you're going to be hardheaded like I was, don't expect much different than the results I had. I got it to work as a pre-amp, sure, but I'm fighting the noise vs volume tradeoff; and upping the output voltage via the software only induces clipping (audible clipping, I might add). I've decided I'm going to have to plunk down the cash for a dedicated pre/pro, unfortunately. I'm hoping something like the Emo UMC-200 will suffice.
This is just some real-world use from my experience. Hopefully it helps someone who was in the quandary I was a few months back.