| Originally Posted by Nigel Hi Graz, I got my pair from Ebay. Item ended last Wednesday. |
| Originally Posted by Nigel I will have to investigate the reasons behind low & high impedance & see whether there are any ideals. For instance, why would Sennheiser make these 'phones in three different impedances? Why did Sennheiser change from 600ohms to 300ohms? Beyer also to whatever they use now for the DT990's etc. Best, Nigel |
| Originally Posted by Gaffer74 Yep. Why do Sennheiser made 1700 ohm ones? Do the BBC require this? Would it change the SQ from the, say, 300 ohm ones? I have heard mentioned that you get a reduction in hiss the higher the ohmage....mine do seem to give a lovely inky black silence that my CX300's/PX100's/HD575's couldn't quite manage. Any truth to this? |
| Originally Posted by Nigel Apologies to you, Graz. I failed to read your question correctly. The reason I decided to buy these was twofold really. One, I'd always wanted to hear them after reading the aforementioned magazine review but had forgotten about them in recent years & secondly, a few months back I purchased a pair of Sennheiser PMX-100's & was very impressed. This reminded me of the HD-480's pads, a kinda smaller version of the supraaural headphone so from then on in, I had to hear a pair. Actually, a third reason is I've always been kinda fascinated by 'phones with impedance at 600ohms! Although now I cannot think what for. I fail to see any benefits. I will have to investigate the reasons behind low & high impedance & see whether there are any ideals. For instance, why would Sennheiser make these 'phones in three different impedances? Why did Sennheiser change from 600ohms to 300ohms? Beyer also to whatever they use now for the DT990's etc. Best, Nigel |
| Originally Posted by Dr.Sade How does the HD480 II (various ohm versions) compare to the other Sennheiser look-alikes HD520 II, HD530 II, and HD560 II? |
| Originally Posted by Sound on Sound In the UK most professional systems employ the PO316 connector (also known as B-gauge) which is an extremely rugged format originally designed for telephone switchboards (before they used switches!). It uses a three-pole plug (see photograph below), making it ideal for balanced audio circuits, and is constructed from brass. Although it has roughly the same dimensions as the more familiar A-gauge TRS jack plug there is a significant difference between the two: the tip of the PO316 is rounded and slightly smaller than the angular, enlarged tip of the A-gauge. This might not sound particularly important, but it means that the contact springs in the PO316 socket don't bend very far when the plug is inserted, reducing the stress on the contacts and lowering the effort needing to insert the plug. The contacts are also arranged to wipe along the plug as it is inserted, helping to keep them clean and ensuring good contact. Inserting an A-gauge plug in a PO316 socket will cause irreparable damage, permanently bending or breaking the spring contacts. Plugging a PO316 (B-gauge) plug into a TRS socket will result in a very dodgy connection, as the contacts will barely reach the thinner-bodied plug. |
