n_maher

Mowed the grass for the first time this year (and so it begins...)

I needed some IC's for the soldering rig (lent out my loaner cables) so I whipped these up last night. I think I will call them the Dusty Chalk series. 24ga solid core Neotech UPOCC in PVC w/ Neutrik RCAs.

Did not get new lathe, still have old lathe, may get new lathe today if I have time. Lily rules all.

Oh I've already got one, I just want a different one.

Wife denied lathe access due to the fact that Lily had a play date and her playroom is directly above my shop.

Took the day off from work, worked on the tractor.

This thread has officially jumped the shark. Comparing the difference between the two versions of the O2 as has just been done is insanity. Do they sound slightly different, yes, but I'd say they are more the same than different especially when properly driven.

Nope, I just have it on a simple pedestal stand. It's pretty stationary in my shop so the wheeled stand would actually just be in the way. If all goes well I may be picking up a new/used lathe today.

I'd argue that most don't need a $1200 (used?) table saw. My Bosch is more than enough for me and only runs half that new.

Is the Sony really not grounded?

Fail at reading my post you did.

Lack a sufficiently twisted mind you do. Hint: FLESHLIGHT

My drill press is out on loan so the counter sinks are not done very well and the boards were slightly damaged so I'll probably replace them at some point. The clamping mechanism that holds them in place could be better implemented as well. I just wanted something to finish it off for now. Mmmmm indeed, even with a mediocre finishing job they look pretty tasty.

It'd be a safe bet that I had the HA-2 in mind.

Ask and ye shall receive.

I think what we're trying to get across (at least I was) is that your 28ohm "low impedance" output is what most of us would consider quite high. I can say first hand that I have heard amplifiers with an output impedance of ~100ohm and it sounded quite back with the 32ohm Grados that I was using at the time. I now use an amplifier with an output impedance of 27ohm and it sounds quite good so I suspect your amplifier on the lower setting will have the potential to sound good. As with many things in this hobby/market the proof will be in the listening. I'll definitely try to give it a listen at CanJam.

I hope this is coming from Maine?

I'm shocked to see the n_maher level of volume listed so relatively high.

Donald, Thank you for sharing the design and your comments with us, I have a few comments. 1. I can assure you that Doug (dsavitsk) was not commenting on the aesthetics of your amplifier. He and I both have a high level of appreciate for clean, straightforward designs both from a circuit and aesthetic perspective. You'll also find that there is a good sized group of us around here who have more than just a passing acquaintance with both design and manufacturing costs. 2. Could you provide a link or further explain the IEC standard for output impedance? All I could find was reference to "IEC 60268-7 Headphones and earphones" which I was not able to access. The 120ohm output impedance sounds prohibitively high to me perhaps even with 300ohm headphones and will almost certainly sound pretty bad with some of the lower impedance headphones we tend to use around here. My own personal amplifier has an output impedance much closer to your 28ohm tap, I suspect that this is what people will end up using exclusively unless they own some of the 600ohm Beyer cans. 3. Your statement "Many headphones are designed and tuned around the IEC spec - now you can hear them as they were intended" doesn't sit particularly well with me. Could you please share whatever research you did to back up that claim? What headphones in particular are designed and "tuned" around this spec? I would have expected that given the proliferation of SS devices that most headphones produced these days (outside the professional studio ranks) would have been designed around a very low output impedance. Regards, Nate

Since I had to break down the speaker rig anyway I decided it was time to update this thread with the tweaks that I'd done to the SImple chassis. Basically I finally managed to make some "feet" for the bottom of the chassis. They are semi-temporary but certainly do the job for now.

Your math sucks.

I wonder if that thing can even turn?

Happy Birthday! This wish is only as tardy as you are filling out your profile!