JML
Headphoneus Supremus
Another positive review: http://www.cnet.com/news/the-oppo-ha-1-headphone-amplifier-definitely-a-slam-dunk-for-audiophiles/#ftag=rss.audiophiliac.ftag
This is a question for OPPO / HasturTheYellow : What is the impedance of the single-ended and balanced outputs on the back of the HA-1 unit. I am considering using a passive pre-amp for volume control in between the OPPO and a power amplifier and would like to take the HA-1's output impedance values into account.
Hi, guys. I have some problems with my setup. I have my Retina MacBook Pro hooked to the HA-1 via USB cable (5 meters), the headphones are HD800s. There's something wrong with the sound on Mac OS X. First, I thought that the USB cable is the problem, but it's not. The problems are gone when I boot into Windows 8.1 via BootCamp. On Mac OS X there are "pops" and "cracks" in the sound. Are my settings wrong?
My question is, where do you get a converter from the 4-pin XLR balanced headphone output to two 3-pin XLR balanced outputs that could feed a power amp? Also, how would this even work? You need a total of six connections for a balanced stereo power amp:
Left: V+ / Gnd / V-
Right: V+ / Gnd / V-
The 4-pin XLR balanced headphone out only offers:
Left: V+ / V-
Right: V+ / V-
So how would a converter cable even work (i.e., where is the Gnd connection coming from)? I've heard of 5-pin XLR which carries a ground pin and can be split into two 3-pin XLRs via a Y cable. But how in the world do you go from 4-pin XLR into two 3-pin XLR, there just aren't enough pins?
5m may be too long, even if it works properly in Window 8.1. We do not recommend cables which are longer than 12' in length.
Have you tried a shorter cable, like a 6' USB cable that came with a USB printer?
I am sure this has been discussed before but for the life of me I can not find an answer.
Everything I play through the HA1 shows as one step above. 16bit shows as 24bit and 24bit shows as 32bit. Any ideas?? I am feeding the HA1 via USB from a ZEN Music player..
Thanks guys in advance.
I don't have any specific impedance measurements, but as I recall the BDP-95 had an output impedance of 300 ohm. I would expect something similar from the HA-1.
I'll try to get numbers for you tomorrow, but I will make no guarantees, as last timed I had asked for discrete numbers I was not provided any. We usually just tell customers that they should use the BDP9x/10x and HA-1 products with devices that have an input impedance between 10K and 40K, but the player will work all the way down to 1K input impedance.