Very cool transparent cMoy headphone amplifier, made using clear casting resin. This is something I have to try.
My walk around headphones right now is a pair of Sennheiser HD 25 1 II. They are rugged, comfortable and sounds excellent. I used to favor in-ear headphones but got tired of continually having to remove and insert them, something not quickly done. But now Sennheiser has released a new set of headphones that tickles my fancy, the Sennheiser MOMENTUM, with a model matched for use with iPhone. There’s a forum thread on Head-Fi about them. With only 18 Ω impedance and designed to work with smartphones, they should be easily driven to insane sound levels. Something I miss with the HD 25 1 II which needs an amplifier to shine because of the 70 Ω impedance. And let’s face it, it gets tedious to carry around a headphone amplifier with your phone and need to unplug to answer.
The last couple of weeks I’ve been thinking of building a small headphone amplifier. I want to tap into the line-out of my iPod to get better sound. I also have a problem with my headphone jack on my pod. After fighting with my friend Hermans dog, he managed to get his paw entangled in my headphone cables and destroyed the cable jack. So I have searched the net to try to find a good amplifier to build (I don’t have the money to buy one right now), and I found the Cmoy headphone amplifier. But I used another build page that has some upgrades to it. Unfortunately I could not find the bread board they used, so I had to make my own design. So after a couple of hours of soldering and using a drill it was time to try it out. And it worked! No debugging or anything. This must be a first.
This is a great way of learning electronics. Just read the articles at TangentSoft about audio amplifiers and you will learn a lot on how audio and amplifiers work. And you’ll find ways of improving or even building better headphone amplifiers as well. You’ll even learn how to improve manufactured headphone amplifiers by modding them.
So how does the CMoy amplifier sound? Loud! And I think the quality is very good. I have tested them on my Shure e2c, Koss MX100 and my Sennheiser 600. I didn’t do a lot of listening with the 600, but the Koss MX 100 get a big quality improvement. Will continue to test it out tomorrow.
My dear wife gave me new headphones, the Shure E2c. I used to use Koss Porta Pro, but after trying sound isolating in-ear phones, I was hooked. My first pair was a set of mid-priced Sonys. But after listening to the E2c’s and then switching to my old Sony headphones, the difference is impressive. The Shure headphones sound so much better. There’s just one problem. It seems Shure has designed the headphones for Mr. Spock because the size of the flex sleeves is way to big. I can’t get them to sit comfortably in my ears. So I have to use the foam sleeves, and they isolate external sounds great, but they’re too complicated to insert into the ear. I listen to music when driving the car and walking to and from customers, and when getting a phone call every fifteen minutes, I just can’t go through the complicated process of inserting the foam sleeves. I’ll try to find other sleeves that are more comfortable. I like that the cable is thick and sturdy. I also love that the 3.5mm stereo plug is angled.
So to summarize, if you have the right size ears, you get a great sounding headphone for a reasonable price.