Hi Timlub,
Very interesting; the input impedance could be a possible deal killer.
I was planning on using my Oppo-105 as a dac and limited input preamp for computer audio files. Its dedicated stereo output's impedance is 100 ohms on each channel. I also have a tube VTL preamp I'm not currently using but its output impedance is 200 ohms, which wouldn't help.
The input impedance on the new AMS-1000-2600 is listed as 13.5k ohms, which should be okay since it's more than 10 times the Oppo's output impedance of 100 ohms. However, Anaview's pdf file (link below) also states:"(*1) The input impedance on IN+ and IN- is not identical and also different between
channels. See application notes below for more information."
The application notes state: "(*1) Open drain outputs with 2kohm in series to limit the
current." I'm not sure what this means when using this module in building an amp.
http://www.anaview.com/sites/default/files/PDS%20AMS1000-2600-C.pdf
I could not find the input impedance on the ALC-1000-1300 so I need to do some more searching. If it is about the same input impedance as the AMS-1000, I believe the ALC-1000 should be an acceptable impedance match with the Oppo. Below is Profusion's pdf file on the Anaview ALC-1000-1300 module specs:
http://www.profusionplc.com/images/data%20sheets/alc1000-1300.pdf
I would like to know if anyone believes the ALC-1000-1300 modules are not a good match for my system. I'm also going to ask James Romeyn his opinion. If they're not a good match, I may be better off going with one of my backup options:
1. D-Sonic M3-600M mono-blocks that have a custom input board that raises the input impedance.
2. Hypex nc400 mono-blocks, I've read, have relatively high input impedances which allows for better matching.
The Aluminati X-2 stereo amp, using the Pascal SPRO-2 module, also has a somewhat low impedance of 2.2k ohms and may not be an ideal match either. The Pascal module data specs can be viewed at:
p://www.pascalaudio.com/downloads/S-PRO2_Datasheet-1_10.pdf
Thanks,
Tim
Very interesting; the input impedance could be a possible deal killer.
I was planning on using my Oppo-105 as a dac and limited input preamp for computer audio files. Its dedicated stereo output's impedance is 100 ohms on each channel. I also have a tube VTL preamp I'm not currently using but its output impedance is 200 ohms, which wouldn't help.
The input impedance on the new AMS-1000-2600 is listed as 13.5k ohms, which should be okay since it's more than 10 times the Oppo's output impedance of 100 ohms. However, Anaview's pdf file (link below) also states:"(*1) The input impedance on IN+ and IN- is not identical and also different between
channels. See application notes below for more information."
The application notes state: "(*1) Open drain outputs with 2kohm in series to limit the
current." I'm not sure what this means when using this module in building an amp.
http://www.anaview.com/sites/default/files/PDS%20AMS1000-2600-C.pdf
I could not find the input impedance on the ALC-1000-1300 so I need to do some more searching. If it is about the same input impedance as the AMS-1000, I believe the ALC-1000 should be an acceptable impedance match with the Oppo. Below is Profusion's pdf file on the Anaview ALC-1000-1300 module specs:
http://www.profusionplc.com/images/data%20sheets/alc1000-1300.pdf
I would like to know if anyone believes the ALC-1000-1300 modules are not a good match for my system. I'm also going to ask James Romeyn his opinion. If they're not a good match, I may be better off going with one of my backup options:
1. D-Sonic M3-600M mono-blocks that have a custom input board that raises the input impedance.
2. Hypex nc400 mono-blocks, I've read, have relatively high input impedances which allows for better matching.
The Aluminati X-2 stereo amp, using the Pascal SPRO-2 module, also has a somewhat low impedance of 2.2k ohms and may not be an ideal match either. The Pascal module data specs can be viewed at:
p://www.pascalaudio.com/downloads/S-PRO2_Datasheet-1_10.pdf
Thanks,
Tim