ozshadow
500+ Head-Fier
- Joined
- Apr 29, 2006
- Posts
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I guess buf634's sound more noticable with other cans. With Grado's, I do not notice them sounding bad at all. Maybe its because they already had a pretty bright sound ?
Originally Posted by luvdunhill pddjsteve so, just choose either the v1+- or v2+- on the intersil DIP-8 and that translates to the V- V+ on the BUF634? Since there isn't an equivalent of the BW pin on the Intersil, is this just not used? Thanks! |
Originally Posted by pddjsteve so, just choose either the v1+- or v2+- on the intersil DIP-8 and that translates to the V- V+ on the BUF634? Since there isn't an equivalent of the BW pin on the Intersil, is this just not used? |
Originally Posted by ozshadow I guess buf634's sound more noticable with other cans. With Grado's, I do not notice them sounding bad at all. Maybe its because they already had a pretty bright sound ? |
Originally Posted by pddjsteve My goal is to be able to swap between LMH6321, Buf634, and the HA5002 along with swapping opamps so I can find the combo I like the best. |
Originally Posted by tomb Good goal. The Millett has been setup that way for quite awhile - BUF634 pads, Intersil pads, and then Amb promoted the jumper that made the BUF634 sockets compatible with OPA551 (as a buffer). The OPA551 cannot be stacked, and is competitive with a single BUF634. The Intersil is not competitive with either one until stacked (my opinion). Then there is the ultimate: Steinchen's DB's. That's a lot of options for a little tube amp. |
Originally Posted by tomb Guys, Please remember to include those output resistors on the headphone output of the amp. The reason you never hear much about the Intersil's is that they destroy so easily. It may be a $10 mistake every time you plug/unplug a set of headphones with the amp on. |
Originally Posted by rsabo I belive you also need an input resistor for the 5002s. |
Originally Posted by pddjsteve Well, I know the PPA v1 uses a 1k resistor before each HA5002, but from the wording of one of the posts in this thread it sounded like someone just stacked them, so I wasn't sure. |
Originally Posted by luvdunhill pddjsteve if you decide to get some of these guys made, count me in for a dozen or so! |
Originally Posted by pddjsteve Well, I know the PPA v1 uses a 1k resistor before each HA5002, but from the wording of one of the posts in this thread it sounded like someone just stacked them, so I wasn't sure. ... snip ... |
Originally Posted by tomb I said it. They sounded much better than BUF634's stacked, but it was on a Millett. So, the experience is probably not applicable. |
Originally Posted by applegd I had a close look at the 04' electronic module in my MOH, it looks like the signal goes into two HA5002s directly, no input resistor in front of EACH buffer at all. |
Originally Posted by pddjsteve Ok, cool. I'm going to leave a single input resistor on the adapter, and not worry about having one per buffer (Tangent's writeup on the PPAv1 says R11-R14 are optional but reccomended). Here is the one I'm going to etch. I removed the output resistor since I'm using one between the output jack and the amp out pads instead: |