Excellent review! The Swiss FB are quite amazing...
Thanks for sharing @gladmo ! Excellent and informative review! I don’t think I will ever try these, as I am too risk averse to experiment with these kind of power things , but I enjoyed your review. Thanks for sharing
@thyname Always nice to hear about people enjoying my writings. I’m a financial markets trader and investor, so identifying risk/reward, knowing one’s own tolerance for risk, and making moves is the one thing I do all the time. I've done well being an early adopter. Seeing some detailed descriptions about what testing went on during the R&D phase would certainly add to credence regarding reliability. In lieu of this, so far anyway, my decision was therefore based on general evaluation of the likelihood that everything that’s been claimed is actually true, including thoroughness of testing. In other words, going with my gut.
Time will tell.
@gladmo Having finished your review, I’m pretty sure I will order a SDFB.
Although my use of "headroom" to describe the sound quality still seems apt to me, I also think it might be something closer to "legroom" that needs a mention here as a way of looking at the mechanics behind this. Haha! Legroom 🙂. I mean like all of the inner electronic parts being lifted up off the floor from an operational energy deficiency vs having been relieved from pressing up against a metaphorical ceiling in a state of energy excess, where clipping and distortion occur. In either extreme state, there's distortion. I can't say with any technical certainty about any of this because I'm not an electricity expert, and that's fine with me. It's just the audiophile buzzwords that count, right? 😁
Has the OP written a review somewhere else for this product or maybe my eyes deceive me? Read this description and review. Similarities are undeniable.
These are around $400 ,now like with my amplifier it has 5 fuses inside ,therefore somethings don’t apply , and in some dacs no fuses ,or some have thermisters
which are better-then a fuse , but if you only have 1 fuse these have a microprocessor and a Copper element ,my only concern there is itshould be plated gold or silver for Copper oxydizes what’s the answer to that ?
The new Bob Carver products as well for Jim and Bob
@tksteingraber Generally, I would say amp first. A little hard to say what order would come next, but I’d guess DAC, then streamer, then preamp. But my preamp has a patented power supply technology that runs on only a tiny fraction of the power that typically preamps do, so I think it’s performance was less restricted by fuses to begin with. So maybe preamp before streamer if it has a higher rated fuse amperage?
@gnu I only posted the review here. If I were running that website, I would place the product description above a long review like this on the product webpage. Just my opinion though.
@audioman58 I can only share that the user manual has a warning not to use the slugs+device in place of an amplifier’s DC rail fuse if there is one. Regarding oxidation, after polishing my copper Sluggos with a gold jewelry polishing cloth they sound different, more neutral and less warm, and at the time it seemed like an little increase in detail retrieval too, but you can’t go back to A/B. I wouldn’t mind having backups of each slug which haven’t been polished because I’m a tonehead. The sound will probably very slowly shift to warmth as oxidation occurs.
@verafiaudio Good morning, you’ve got my attention with those new Sluggos 👀
@verafiaudio Mark, I’ve got a question. It’s been awhile since I’ve read all of your comments on other forums, so I’d like to clear something up about what I recall less than perfectly.
If, for some unexpected reason, the active parts on the circuit board fail (microcomputer, whatever else could potentially fail due to defect or something) while it’s in use, can charge still flow through it? Or is the relay method one that is passively closed and blocking charge from flowing if the active electronics were to malfunction?
PS - when the new Sluggos arrive from various sources I will gladly let you (or others) test...
@verafiaudio I really appreciate all three of those responses. Your answer to my question is brief, but that statement is what I was looking for. I admit that I don’t understand much about relays and the related terms.
I just found that I actually have a spare pair of unpolished large copper Sluggos for my amp, so I’m going to see how the system sounds with those in place of the polished ones that are in the amp now. A normal type of daily activity for me 🙂
Switching to unpolished copper slugs in the amp and keeping polished copper slugs in the other three components is really nice. Gonna keep it this way. A little more body, warmth, and low end, and slightly less relative energy in the top end, as expected. There's still the same presence of subtle ambient cues and reverb that I was checking for. Very cool.
@cleeds : yes I thought the same when I read that link. But to be fair, there is this reference at the beginning, right after description:
Read the long detailed AudiogoN Consumer review:
Swiss Digital Fuse Box - "What headroom sounds like"
There is also the link to this thread when you scroll down. IMO, as long as proper credit is given to the original writer, and permission to post (not sure if @gladmo gave permission), all fair game. IMO
I didn’t have any communication with Walter at Underwood HiFi, but nothing about him copy/pasting my review bothers me. I don’t feel cheated, stolen from, or anything like that. He’s selling this device as a type of partner with Mark of Vera-Fi Audio. I’ll allow it, no worries. Linking here was a good move.
I did speak with Mark on the phone a couple times while I was trying to form a buying decision because I had questions about the two different fuse rating in my DAC, etc. He was super helpful and I got an honest and cordial vibe.
Totally agree with that statement on Mark. Great guy to deal with. I have dealt with him a few times, EQUI-CORE, and most recently for the Purons.
@wig what do you mean? Can you please elaborate? How did you replace the 4 fuses inside your KT88 amp with FB (what is FB?)? FB is the Swiss Fuse Box discussed here? I sincerely hope FB does not mean Facebook 😂🤔🤷♂️🤦♂️😂😂
You can just use stubby little Nema 5-15p to IEC C13 adapters to connect the fuse box to an outlet. They sound good in my application. You may or may not need some extra support at the outlet with this method because of the leverage the weight of the device will put on the adapter’s connecting spades. Vera-Fi Audio also makes 1-ft mini-cables you can try using.
It’s a $395 upgrade for each component. You’ll get enough Sluggos included for the fuses that are replaced. My DAC and amp both use two Sluggos. I wasn’t charged extra for those.
@vandy357 given Wig’s post just above yours, I’m not sure what your concern about the amp is. Just leave the DC rail fuses where they are.
@gladmo I guess I didn't read that post. I assume I need one fuse box for each component? I also assume from what I can find on the interweb that I replace my 2 fuses near the IEC on the amp with the sluggos, then insert the fuse box somewhere between the component and the wall outlet or Power Re-generator. So this basically just adds what would be a circuit breaker between the component and the wall plug, so if there is ever a problem inside the unit it will trip the breaker instead of blowing the fuse. I may have to give this a try, at least on the amp for now. If this really works to improve the sound I may eventually add one to each component. Thanks for the info and the clarification.
@vandy357 That all sounds right, but I can't be totally sure about your amp fuses. You can call Mark at the phone number on the website URL I gave at the bottom of the review and he'll get you sorted out.
@gladmo Thanks again, big help. I am starting to wrap my brain around the concept of these devices, I honestly just didn't understand the application at first. I worked on cars all my life and have witnessed people replacing fuses in automobiles with everything from aluminum foil to screw drivers, with a few that caught things on fire by doing so.
@verafiaudio thanks Mark for the phone conversation and the help with the product.
My pleasure to help, guys.
For anyone that is using SDFBs, I ended up switching back to the polished copper Sluggos in my amp after a brief time with the unpolished ones. It became apparent to me that, actually there is some small loss of fidelity due to the oxidation-based corrosion on the unpolished Sluggos. My recommendation is to go for polished Sluggos with any SDFB you have installed.
OK…. I caved. And bought one Swiss Fuse Box. Maybe because Mark is a pleasure to work with. Or maybe easy picking for my Innuos ZENith MK3, for which I was already using a SR Purple fuse (and before that the Orange). It’s pretty simple to deal with fuses on Innuos. So there is that.
All I can say is …. OMG! I know I sound like a teenage girl 👧 now 🤷♂️🤦♂️. More later when I really have a chance to listen to for an extended period of time this weekend, but first impressions are fantastic. And I am a big believer in first impressions.
Oh… and it was extremely easy to set it up. Very simple. It literally takes minutes to put to work, if you have connections ready. And I am happy the adapter I bought from Amazon (link below) works great in putting it directly to my power distributor (existing power cord on the other end to Innuos)
Today I received (finally) the first of the next gen of Sluggos. I love the name Slug Club
Thanks – Mark
So glad to read this. I’ve had one of those amazing days. Just incredibly glad for you and the others that have stepped up
Yep, I caved and bought one of these thing too. I am so glad I did and want to give a huge thanks to @gladmo for his initial write up on this great product. Everything about the sound of my system is now better, even with my meager setup abilities I have never heard my music sound this good. Thanks Mark, it is a pleasure to do business with you sir! Next will be one for my PS Audio MK2 DAC, I can't wait to find out what that will do for my system.
I appreciate all the raves, but..
my main issue (only because I have no personal experience with what it/they does/do top to bottom) is a slightly hot top end that I only noticed recently. Now I can't discount that for over a week now I have been using a product called Sonofit (drops in the ear canals) in hopes/expectations that it will resolve decades of tinnitus, which is bad enough that I sleep with the TV on to cover the constant ringing
@tweak1 I have also suffered with tinnitus for 30 plus years which seems to get worse with age, but still doesn't sound as bad as what you are describing with your case. Tell me more about the Sonofit drops, do the seem to be working? Now on to what I can tell with the Swiss Digital Fuse box installed. The first thing I noticed is how voices sounded, I was listening to a Van Morrison tune, when the music began his voice seemed to come out of nowhere, then his female backup singer sounded like she took a step or 2 back and a couple steps to her right, (she is to the left in the sound stage). When I listened to this same tune before the fuse box the backup singer almost sounded like she was singing into the same mic that Van was using. Then I noticed how much smoother my system sounded, this is hard to explain but to me the music sound a lot more coherent than it did before from top to bottom. Honestly, I am flabbergasted at the difference the SDFB made in my system.
I certainly will be eager to hear more about how the drops are working for your tinnitus. Good luck with that.
Thanks for posting your impressions. I must admit that your unique solution, the adapter on one end of SDFB definitely peaked my interest. I wasn’t too keen on adding a garden variety pigtail in the signal chain. You know the PC’s in my system :-)