There used to be reports on Purple (and earlier generation) blowing more easily. However, I have not heard of the issue with newer fuses such as M-1 and M-2. I had a 6A fuse in P15 (5A required), and it ran great.
Thanks again, I have a class AB 100 watt amplifier. It uses a lot of power at startup for about a second, which is why I’m concerned about the fuse blowing since this has happened with some other fuses in my regenerator.
Do you order from the Cable Company?
Yes, they offer frequent discounts.
I used to have the same problem with occasionally blowing the mains fuse on my CJ CA200 integrated because of the initial inrush when switching from standby to on.
It may be a step down (or not) in “quality” but HFi-Tuning makes an extra slow blow type fuse for their Supreme3 model which is specifically designed to remedy this problem. This allows you to get the specific rating for the fuse needed and not play the how much can I go over the recommended rating before I melt the piece of equipment game.
I purchased mine from Kemp Elektroniks in The Netherlands although they may be more locally available, too. There’s the added benefit in that they don’t cost and arm and a leg compared to some other brands.
Thanks, joe. Looks like those are the XT Supreme3 fuses.
Yes, those are the ones. I’ve never bought fuses from Synergistic Research, Audio Magic, etc. so I don’t know how the HiFi-Tuning stack up against them so I can’t speak to that but I do think they are a very noticeable improvement over stock fuses. And they are directional.
Hifituning now also offers to equip their fuses with a small diamond. The extra cost is limited, and the fuse still costs much less than an AM or SR fuse. In terms of sound, the diamond is supposed to provide a more precise image, better tones and a quieter background. I haven’t tried these yet. I had the normal Hifituning Supreme silver-gold fuses. In terms of sound, these are better than standard fuses. How and whether an AM or SR fuse is better also depends on personal taste.
Today I took out AM M2 fuse and put the stock fuse back into PST. Unlike Purple and other fuses, there was clear loss of detail and clean sound for sure. The M2 fuse is a winner!
Thanks for sharing this. If only the fuse didn’t cost $300. 
It’s crazy for a fuse selling that kind of money, but one can say the same about too many things in this hobby.
Occasionally they’re available in the used market, and The Cable Co can give some discount too (where I got mine).
Not many discussions on fuse anymore. But for all the fuses I have tried, there is only one fuse that I considered to be able to provide long-lasting improvement on most components. Others that I have tried all became ordinally overtime.
I just put in a AM M2 fuse (one that was serving MK2 for a long time) into PMG 512, and the improvement was immediately apparent.
If you think PMG 512 is dead quite, Well, AM M2 proves it can be further improved. The rest of family has noticed the music is more alive and the midrange is even better. I will not even call the improvement subtle.
For PMG 512 owner, this is the fuse to get.
When I got my last set of fuses, which was the SR Pink fuses, AM fuses weren’t available in UK mains plug size.
Because of this and wanting all my fuses the same I went for the SR Pink internal fuse for my P20.
I know the AM M2 consistently gets great reviews.
AM now makes UK Mains fuses.
I may be tempted to get a AM M2 for my P20 just to see how it performs.
Can’t remember if it’s directional and how many hours of burn in it requires, - 300?
Unclear if directionality is a thing with AM. Members here have claimed both ways are best.
I never heard a difference.
Burn-in is a thing. Needs 5+ days. Have heard this. The box even says 125+ hours.
Has anyone a mix of SR Pinks and AM M2’s in their system?
I currently have a loom of SR Pinks but recently added a couple of new components into the system, Both of these need a fuse upgrade which leaves me with a dilemma.
I’m considering ordering two M2 UK fuses for the components before my P20 and an internal fuse for the P20.
This would allow me to use the two Pink fuses from the components before my P20 and move them into the two new components.
My query is do SR Pink’s and AM M2’s work together or do they upset the synergy in a system?
I agree - SDFB with graphene sluggo is “no fuse” until you need it. I’ve never triggered my three.
Twice one or another of my four have “tripped” (due to rectifier failure) but they reset in about a minute and no other effects.
I just ordered a M2 fuse based on many recommendations on this forum. AI is recommending installing top of M towards the cap of the fuse holder. I believe this is what you are doing. Regardless, the one that I just ordered will be going in that way and into my PMG Signature preamp which feeds the M400’s.
I assume by now you have completely enjoyed the new M800’s with your FR-30’s and as a bonus in the winter they will keep your listening room warm. Mine do get very hot, which is why they said not to stack them.