Check the frequency response curve in this review. Portable, looks like what you want. http://www.head-fi.org/forums/showth...hlight=0HA-rep

That fact should probably enable you to gauge my opinion of the design of most portable amps. I had a look around and found two, by the same manufacturer actually. Seems the guys over at xenos have similair opinions about amp design as I do. Both the Xenos 1HA and Xenos 0HA-REP, are designed...

I don't agree that power supply caps influence the sound persay. Old capacitors however, especially electrolytics if they dry out, no longer have the same values as they used to, which means they don't act in the manner the circuit expects them to. In AC to DC supplies, where the caps are...

I don't believe a 10% drift in the hFE, of the transistors would make a difference in sound, maybe a minor change in volume, but those changes would effectively be negated by the volume pot. As I said, I haven't seen changes, that in my experiance, would be enough to alter the sound. As for...

How much change were you seeing in the transistor's hFE, and after how much use?

Break-in definiatly occurs, in electromechanical systems, like speakers or headphones, generally a small increase in compliance. Tubes, we all know they change over time because of the constant heat in which they operate. As for cables, in several double and triple blind tests, I personally have...

I had a chance to play with this amp for a week, and am seriously thinking about getting one. I don't really listen to music in a portable sense, and I have a great listening system at home, but I love the sound this amp has. Anyway, I wanted to give my opinion on the SFS. I was speaking to a...

Nightbird, didn't you say you were using the higher gain mode, and driving 600ohm cans? Wouldn't this put a heavier drain on the battery? Just a thought.

I built this phono preamp to listen to vinyl on my system (duh). It's based around ESP's multi-stage active/passive RIAA equalization scheme. I designed a toroidal transformer, regulated power supply. I based the layout around 4 single channel opamps, as this gives the greatest versatility for...

For such wonderful speakers, I'd definiatly take the trouble to find a way to audition them with a Bryston 4B series. You can get a 4B ST off of eBay for about $1500. These are some of the best amps ever made. They come with 20 year, fully transferable warranties etc. Just read any reviews if...

The 8903A is one of my favourite peices of test equipment. There's newer much fancier stuff at the development lab I work in, but nothing beats that box for ease of use and functionality when it comes to designing solutions for audio systems. The cost of buying one yourself isn't too bad, I...

I have the Yamaha DVD-S1500, and it's the best player I've owned. Yamaha, unlike most manufacturer's in this price reange, really do pay attention to the quality of the audio output. I'd love to get a DVD-S2700 from my experiance with my current player. Happy Listening!!

This is where I love my Yamaha DVD-S1500 dvd player. If i'm listenting to music, I run straight stereo with CD-Upsampling. Wonderfully smooth, dynamic sound, with a slight drop in perceived volume. If I have movie, I just go into the onscreen menu, and tell it to mix-down the 5.1 tracks of Dolby...

Ok so here's one of the connectors . . . the other one is the same. You'll notice that the strain relief is missing to fit the wider cable, and that you can see some of the drain wire as well as signal lines peeking through. The connector itself is a little deformed right at the top edge from...

What's the best way of uploading image files into this forum system? I have the photo. Now what?