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  1. M

    Topping B100 Amplifier Review

    Not necessarily - it depends what the voltage applied was. If it was too high and not ESD, that can screw up the op-amp used for input pretty fast. It doesn't matter if it's a Topping or King Charles amp - if the input is an opa1656 and the voltage is too high, if that "too high" is high enough...
  2. M

    TANCHJIM Space Portable Headphone Adapter Review

    Yes - did you get your firmware updated? Why are you updating - having an issue or just trying to update for best stability/performance? edit: also, to elaborate a bit about the treble - the amount it's diminished when not in NOS (1), is very very small, and smallest in (4). If I didn't have...
  3. M

    Tweeter Recommendation for Woofer

    How did I miss your post?! That tweeter looks excellent! It does need a notch filter (like I said I was trying to avoid if at all possible), but other than that, it's perfect! (honestly they all need a notch filter so this doesn't matter) Because of the way it performs and the way I like to...
  4. M

    Tweeter Recommendation for Woofer

    No. If it was going to stay active, I'd listen to it and if I liked it I would definitely go with it no problem. But I'm not an experienced passive crossover designer (and I don't have a shop full of coils and caps to pull from), so because of its Q of 1, it's not ideal for me. You could call...
  5. M

    Tweeter Recommendation for Woofer

    The SB Acoustics does look like a nice driver. If people love its sound, it is compatible with the RS150P-4A, very well! Due to its Q and the fact I'd be doing this passive, I think a 4-4.5kHz cross is where I'd end up (not a problem for what's effectively a 2-2.5" driver (a 4-5" driver with...
  6. M

    Tweeter Recommendation for Woofer

    The way I look at tweeters, if you want to be able to use it somewhat low (ie. from 0.5 to 1.5Fs especially) and you want high fidelity, Qts needs to be between 0.5 and 0.65, maybe up to 0.75 if it's really nice otherwise. Reason being, in the two octaves above resonance, there will be added...
  7. M

    Tweeter Recommendation for Woofer

    Oh, I haven't settled on anything yet - I was moving toward using Equalizer APO, but I'm open to anything. Suggestions?
  8. M

    Tweeter Recommendation for Woofer

    I'm putting the cap in series with the tweeter, not across it - for DC blocking vs. 1st order crossover. The tweeter I have is rated to work down to 1.5kHz - if you've ever seen ATC's 3 inch dome, it's a mini version of that. It's got a dual suspension so no rocking modes (its linear travel is...
  9. M

    Tweeter Recommendation for Woofer

    I think you just misread my OP - I'll be using these two drivers as the trial run for my drivers that cost 10-20x more. I'm going to learn the software and ensure the hardware is stable long term (no pops etc). Once I've got things configured and the drivers are perfectly integrated, I'll know...
  10. M

    Tweeter Recommendation for Woofer

    Very true - I'll be using a cap, but since it's going to be in series with a SOTA tweeter driven by Topping LA90D and a DAC more transparent than even the amp, I really have to choose the right one. Well, I have to be sure the one I choose, I'm not going to learn 32 days later it's fundamentally...
  11. M

    Tweeter Recommendation for Woofer

    The Audax is almost compatible - would need a notch but maybe I can't get around that. The SB Acoustics Qts is 1.1 so would force a really high crossover as well. The Audax 0.7 is close enough, I think, that it wouldn't be an issue. Thanks for the suggestions - I'll keep the Audax in mind
  12. M

    Tweeter Recommendation for Woofer

    I can't do the RST28 - it looks like a decent tweeter at a pretty good price, but I couldn't cross it any lower than 3kHz (and I might want to do that) Its Qts is almost 1 and with its fs at 750Hz, two octaves above Fs is the minimum crossover frequency (and still not ideal) Some might say...
  13. M

    Tweeter Recommendation for Woofer

    So I have a project - transforming my (pretty expensive) 2 ways from passives to actives (ATC SCM20 Pro PSL Mk2), and I had the (probably wise) thought: I should probably practice on cheaper drivers... until, at least, I get very familiar with amp behaviours (like at power on) and DAC...
  14. M

    Topping Centaurus R2R

    It's on Topping's website now in their available products :D
  15. M

    What Causes This Output from Headphones?

    What I think the higher and varied group delay in the 1-6kHz range sounds like is speakers in a room with reflections - it almost takes away from the detail, not so much adds spaciousness.
  16. M

    What Causes This Output from Headphones?

    More data is always better, even if it's under a hyperlink that says "more" How else can one determine how things are related with only surface-level data?
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