I bought a Supermacro 2 about 3 months ago. I am really enjoying the amp. I am wondering if it is worthwhile to upgrade the amp to the Supermacro 3. Is the difference in sound quality worth the cost of the upgrade? Since I have the four switches, the upgrade would cost me just over $100...

I would like to recognize Dr. Xin for his outstanding customer service. I ordered a Supermacro amp just over a month ago. A couple of days ago, I noticed that the Coby AC-DC Adaptor was not charging the batteries inside the amp. The adaptor was clearly not working properly. I sent a...

I purchased the Sennheiser 595s about three weeks ago. The vendor (Headroom) has a 30 day exchange policy. I have about 4 more days to decide if I should upgrade from the 595s to the 650s. The incremental cost is $130. Does this upgrade make sense for the money? Most of the time I am...

Can I plug my Sennheiser 595s (1/4" plug) directly into the Xin Supermacro amp? Or will I need a 1/4" to 1/8" cable adaptor? I cannot tell which size plug fits into the Supermacro. Thanks!

I recently purchased my first amp to go along with my Sennheiser 595s. I also own a pair of Ety 4Ps. The amp is a Headroom Airhead. Unfortunately, I've noticed very little difference in the sound quality using my Sennheiser 595s with or without the amp! I am thinking about ordering a P-S...

Earlier this week, I bought the Sennheiser 595s along with an Headroom Airhead amp. This is the first amp that I have ever owned. So far, I really enjoy the headphones. However, I am having great difficulty hearing a difference in the sound with or without the amp. My source is a Panasonic...

As you can tell by my number of posts, I am new to this forum. Being relatively new to audio technology, I've been reading quite a few forum threads over the last few days in hopes of making a more educated purchasing decision. This stuff can be quite confusing, so I hope that I am at least...