Recent content by ScottFW
  1. ScottFW

    Washington, DC./Maryland/Virginia Head-Fi Meet - May 18, 2019 - Gaithersburg, MD

    And how do we begin to covet, Ken? Do we seek out things to covet? No. We begin by coveting what we see at head-fi meets. I seem to recall electro-shock collars being brought up during the dinner conversation. Not sure if it was in this context or otherwise. :smiling_imp:
  2. ScottFW

    Washington, DC./Maryland/Virginia Head-Fi Meet - May 18, 2019 - Gaithersburg, MD

    Thanks to @PJABBER for organizing and to all who brought gear. Being out of the "auditioning gear" game for a couple of years, there was a ton of stuff I hadn't heard. The Bottlehead Mainline has been around for a few years but I had not previously encountered one in the wild, so that was a...
  3. ScottFW

    Washington, DC./Maryland/Virginia Head-Fi Member Meet - May 18, 2019 - Gaithersburg, MD

    Looks like I've got some unexpected availability this afternoon, so I will be there. Not bringing any gear (no time to get my act together), just coming to get caught up on what's new. I think it has been a couple of years since I've been to a meet. See y'all in a bit.
  4. ScottFW

    The Opamp thread

    LME49724 is not a single opamp as typically used in audio devices. Never used one myself but it's definitely not going to be plug-and-play according to the linked datasheet. A standard single opamp like a NE5534 has the +V supply on pin 7 and the -V supply on pin 4. The LME49724MR is a...
  5. ScottFW

    Massdrop x Alex Cavalli Tube Hybrid Amp (CTH) - Dropping Monday

    K553 Pro is what I use at the office. They're inexpensive and don't leak much sound even when listening at decently loud volume. They're also easy to drive - pretty sensitive overall and the big biocellulose drivers make good bass without needing a monster amp. I run them off a Magni 3 which is...
  6. ScottFW

    The Opamp thread

    They're not unbelievably weak, but they break probably a bit easier than most. I broke one leg off a MUSES 8920 when removing to install sockets in my TEAC UD-301 (the 8920 were the stock chips). It was kind of a pain due to the chips being fit pretty tightly to the board... PCB hole spacing...
  7. ScottFW

    Massdrop x Alex Cavalli Tube Hybrid Amp (CTH) - Dropping Monday

    The combo is pretty good. My T50RP are the MkII version, modified to make them listenable. I have modeling clay worked into the back of the baffles, earcups lined with acoustic foam and stuffed with drug store cotton sheet material which combined to effectively tame the ridiculous midrange echo...
  8. ScottFW

    Massdrop x Alex Cavalli Tube Hybrid Amp (CTH) - Dropping Monday

    I have a Crack with some mods as well as the CTH. Built the Crack a few years ago and have really enjoyed it with HD650s. Then I got some orthos (T50RP) that I modded to the point that they are actually listenable, but the Crack isn't a great match for those because they're 50 ohms and take a...
  9. ScottFW

    Massdrop x Alex Cavalli Tube Hybrid Amp (CTH) - Dropping Monday

    IIRC it outputs about 1 watt, and not many loudspeakers can be driven with real authority by 1 watt. EDIT: Nevermind. Forgot the MCTH doesn't have line outs. Your Personus are powered monitors with their own built-in amp. You could theoretically run the headphone out from the MCTH to the input...
  10. ScottFW

    Massdrop x Alex Cavalli Tube Hybrid Amp (CTH) - Dropping Monday

    So those of you who've already received yours ordered the +SDAC version [lemme see, when did that version drop? September?], while those of us who ordered the original amp-only version on the first day it dropped back in August have been sent to the back of the pack of massdrop's order...
  11. ScottFW

    TEAC UD-301

    Sounds like a different problem. These fuses are not the self-resetting type, and they don't work intermittently. They are either blown or they're fine.
  12. ScottFW

    The Opamp thread

    I've never bought opamps from aliexpress or from any other source shipping from China. If it's a low price on an ordinarily expensive "audiophile approved" opamp (OPA627... cough cough) it's a fake, whether it's coming from China or elsewhere. Not that price is the only indicator (fakes can be...
  13. ScottFW

    The Opamp thread

    I don't know anything specifically about your sound card, but my Audioengine D1 has the AK4396 DAC with just one dual-channel opamp driving either the line outs or headphone jack. Presumably you are aware that the LM4562 and LME49860 are dual channel opamps, but the LME49990 is a single. So if...
  14. ScottFW

    TEAC UD-301

    The stock fuses were 200 mA and I replaced them with 250 mA. Using a higher current replacement is not something I would ever do on a mains voltage line, but to supply this analog section they're running at lower voltage and seeing a fraction of an amp so I reasoned it was probably safe enough...
  15. ScottFW

    Sennheiser HD650 & Massdrop HD6XX Impressions Thread

      High output impedance, in and of itself, is not a desirable trait in an amplifier. The BH Crack doesn't sound good because it has a high output impedance; it sounds good because it's an output transformer-less tube circuit, and a necessary limitation of "most" OTL tube amps (certainly those...
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