Sorry to revive an old thread - from the diagram in the PDF file, it seems to me like the MJ-079 jack does NOT isolate the plug ground from the case because the plug itself connects the two outer poles... In this thread , GainHead suggested this isolated Kobiconn 3.5 mm jack: Mouser #161-7300

Whoops! No, the jacks are not isolated. I have to admit that I totally forgot about the ground channel. OK, I guess I'll look for new jacks... thank you for the hint, MisterX!

This is a CMoy in a blue translucent Hammond case: blue CMoy The 9 V battery slider is made by Bulgin; the amp also has a DC plug. The opamp is socketed (OPA2227). The ground channel contains a TLE2426 and a BUF634 in a TO220 case through which I stuck the blue LED. The circuit (straight from...

The joints on my DT250 headband click audibly and palpably when sliding. There are no wear marks on the cables that I can notice, but I admit that I am lazy and did not remove the foam thingy beyond 5 mm of the joints.

Given that each company supposedly uses their own production mask for the circuit, there should be subtle (or maybe even not-so-subtle) differences in part quality and thus in sound. Did anyone do a comparison? The makers I found are TI, Philips, Fairchild and ON.

Quote: Originally Posted by Jmmmmm can someone give me their impressions of the supermicro? There isn't a whole lot about it on here Well, differences between amplifiers do not seem to be as drastic to me as they obviously are to other people, but what I think is that the...

IMO this is a matter of taste. I do not listen at very loud levels, so a gain of 6 is plenty for me with the DT250-250s (I change R3 to 2K instead of 1K). Other people might disagree and recommend the standard gain of 11. Also, higher supply voltage is better for high impedance headphones, so...

Looks good Where did you get those black-rimmed jacks?

The DS1802 from Maxim seems to be the only option if you want to keep it simple - what you need is only a 5 V regulator in addition to the IC itself. Other ICs need a microcontroller, for which in turn you need a program and a programming device and some knowledge. Or you could wait for the...

In my opinion, it is best to seek out an experienced teacher who is still close to the source of his art, meaning that he (or she) had a dedicated and experienced master himself -- most often, you only find that in people who went to the country where their art originated. Another possibility is...

My amp just arrived (I'm in the second European batch). Thank you Jan, Jude, and Peter

Quote: Originally Posted by NeilPeart Now if only some enterprising individual would take the T-amp and do this: Replace cheap speaker clamps with quality binding posts Replace 1/8" input with quality RCA caps Replace cheap pot with Alps Blue Velvet or better Well, look here...

I have neither time nor available funds to do that this year, but I'm still curious

Any news on the RME ADI-2 DAC/ADC? At least in Europe, its price is half that of the Benchmark DAC1. It doesn't have good looks, and the I/O options seem not to be as versatile, but OTOH the price is very appealing. On some German boards, there are reviews that contain huge praise for the ADI-2...

I don't think that this amp was designed with the Sik Din in mind. According to the press release (PDF file), the only user control is the on/off button, so it seems to work with the iPod onboard headphone out only.