A thousand apologies, iQEM. I thought I had updated the first post with the Instructables project, but apparently not. I've fixed that now. https://www.instructables.com/DiyMod/ If you are into computers at all, you'll find there's a longstanding tradition of propping up old devices. There are...

There is a lot that I have to work on, but I'm publishing it as is for now since I've been procrastinating this for years. I'll work on adding stuff like guides on how to open each device, but for now, there should be enough to go on to do your own diyMod. https://www.instructables.com/id/DiyMod/

The sound leaves the Wolfson CODEC, then it enters a passive filter (inductors, capacities, resistors) before reaching the dock pins. There is no further amplification happening, so when we short the filter components, that is, rewiring from the CODEC’s output directly to the dock pins, there is...

A thousand apologies to the people in this thread. I more or less left head-fi for a good couple years, satisfied with my audio equipment. Thus, when my tutorials disappeared off those free file sharing sites, I meant to transition to a permanent page on my personal website. It fell through the...

I'd be interested in joining.

There are a couple reasons why I tried this 2 channel design.   The Mini^3 was a design by amb and morsel, used with permission. I wanted to break away from borrowing someone's design into standing on my own two feet, so to speak. I know it's more or less a Cmoy circuit, but I still have some...

I'll be there later today. Hope to make it by around 3 or 4, but hope I don't miss too many people. Super excited!

@swich401 I don't know who else you messaged, but it would be worth contacting Edmonton head-fiers. Wouldn't be the first time Albertans traveled for a meet.

I should be able to make it to this one. I'll be bringing my 650s, modded SR60s, and PortaPros. I'll bring my Carrie Amp (my own design), and my MacBook Pro for playing files. Looking forward to it!

I was thinking more of the reverse polarity damaging the caps, but taking them out wouldn't be a bad idea to experiment.

Any chance for high res shots of the bottom side of the board? All that resoldering can't be good for those traces. From your previous posts, sounds like the TL750 and DCP are both working fine independently of each other.   When I put in a tantalum caps backwards, it went up in flames; it...

I've built a couple in the past few months, so now I have some great learnings to apply. Will definitely update this thread when I get there, which should be early in the new year.

What's the DCP's output reading?

00940, what's your take on the isolated grounds? When you connect signals L, R, and G from the DAC to the amp, doesn't that just end up circumventing the ground separation?

Oh snap. I gotta work on my reading comprehension. 

For my Carrie Amp proto run, OSH Park was about the same price as Imagineering per board, but I got mine in a week. Min 5 boards though. 4 sq in, so $20 per board plus $24 for ground shipping to Canada.

Hey folks,   As Avro mentioned, I am indeed kinda busy. Marriage and work and vacation taking up my time in the last few months, but as the dust has started to settle, I want to move forward with the design. First step is actually getting the PCBs, but I want to double check that my design...

How's it look now?   Joined both ground planes into one big happy family Symmetry for everyone! Removed all the bits related to rail splitting and regulation Switched from 12 V DC-DC converter to +/- 15 V version Isolated grounds again LC filter on power rails Added SO8 on bottom More through...

Thanks for the feedback, guys. Back to the drawing board for me. I thought the regulators would be necessary because of variation in voltage vs. load. Why wouldn't that apply here?

That's an interesting chip, MisterX. From what I understand, I could get +/- 4.5 V roughly from the LTC3260. However, now that I'm ripping up the PSU altogether, I'm thinking we could go with +/- 15 V, which is a category of DC/DC converters that doesn't have a deep bench. For now, I'd like to...

Excellent question, Avro. That's a vestige of the OPA690's power supply maxing out at +/- 6.5 VDC, hence why I kept the voltage low in v2. Let me get rid of the TLE, but now I need to reconsider the VREG. Hm. Great feedback.

Not your fault, Avro. That one's on me. 

A guy takes a year and half hiatus and you go ahead and change everything on him? :D Presenting the Carrie Amp v3.     Yes, I'm back, and I've been silently toiling away on a new design for the past few weeks. Wow, it's great to see so many new and exciting projects here on head-fi; the...

Good to see I haven't been forgotten after a super long hiatus. :)

Love that the community is taking off. When I was organizing meets a few years back, it was like pulling teeth because the group was a bit small. Put me down as tentative. Gear that I would bring includes:   Sennheiser HD650 stock Grado SR60 modded (at one meet, I was told they sounded...