Ditto. There can be only one!
thanks a lot, how much you paid for it?
If you do a google image search "270 ohm 5w resistor" you will see both types they do the same thing just transfer the heat generated differently.
Four white cement ones are used in the standard Crack when the speedball upgrade is add two are removed and two large heat sinks are used instead.
The gold ones are wire wound but in=cased in alloy to transmit the heat to the case. Crack case is open underneath with vent in the top plate for air circulation.
Here's a pic of a standard Crack and then with speedball note the extra circuitry and the two large black heatsinks which replace the two long white cement resistors shown in the lower half of the first pic.
what does the speedball add to the standard crack?
Only temporarily, I am amping them with a FiiO E17. However, at the same time I ordered the HD 650s, I also ordered a FiiO E09K to supplement my existing FiiO E17. The HD 650s arrived first, but the FiiO E09K is "in the mail" and should arrive any day. The HD 650s are sounding great with the E17, but I ordered the FiiO E09K in order to have an appropriate upgrade in the amp department (within my budget) at the same time.
I got the HD 650s from American Musical Supply, which is an authorized dealer. I'm also claiming the $50 rebate that Sennheiser has on the HD 650s through the end of April if they are purchased new from an authorized dealer. I ordered the FiiO E09K from the Micca Store, which is an authorized FiiO dealer.
E9 does a good job with the HD650. I had that setup for a while when I started and loved it.
It pretty much does exactly what Bottlehead say it does.
"So what does it do for the sound? The most immediate thing you will notice is a better sense of clarity. Things get tighter and quicker, bass and midrange get cleaner and more dynamic sounding, and the background gets more quiet. As with all of our upgrade kits, the improvement is easily heard."
I'll have more thoughts on this in time.. but I can say with confidence that the Geek Out 1000 is an absolutely TERRIFIC amp for the HD650. It sounds like a 'mini-version' of my SB'ed Crack in many ways in that it's smooth, very spacious, dynamic, resolves effortlessly, and has that same kind of tonal richness and overall delicacy. The sheer size of the sound that's coming from this little USB DAC/amp is something to behold.