Aftermarket fuses in the BHK 300s


#1

I’d like to try aftermarket fuses and Paul even wrote a nice comment about hi fi tuning fuses, but I can’t find any h rated specialty fuses. At listening levels my Bhks draw about 200 watts. Can I get away with a non h fuse in the BHKs?

thanks!


#2

Aren’t the fuses that come stock a high quality fuse? Pehaps Paul can comment. I’m loving my BHK 300’s.

Replaced a power outlet today and am hearing even more from these amazing devices .


#3

They are hand selected fuses we use in the BHK. If you want to upgrade, I recommend only the two ceramic power fuses that are slo blo types. I don’t see any advantage in the 4 glass rail fuses.


#4

After Paul’s discussion on fuses this week I purchased the Hifi Tuning Silverstar fuses on EBay for $30 each. I only purchased the 1.6A and 10A slo blo.


#5
Tech HiFi said After Paul's discussion on fuses this week I purchased the Hifi Tuning Silverstar fuses on EBay for $30 each. I only purchased the 1.6A and 10A slo blo.
Let's hope they are not blown. This would be quite a blow 20_gifgiggle_gif

#6

Tech, Any results yet from the new fuses?

BTW I used to love Tech hi fi and still have an old catalog of theirs I saved.

I was drawn to music and stereo gear at a very early age and sometimes wonder why I get so much enjoyment out of it as opposed to most other people. Maybe our brains are wired differently…


#7

I have not received the new fuses yet, due to arrive Monday.

I worked at a Tech HiFi Bargain Center from 80-82 when I was in high school. GREAT fun!!!


#8

What size and amperage on the ceramic fuses?


#9

1.6A and 10A slo blo


#10

Was there ever any feedback on how the HiFi Tuning fuses did? Compared to SR, the prices cannot be beat.

UPDATE: Having wound my way through the fuse threads in other topics, I think I am going to try the AM Beeswax. I almost did this a while back, and now it seems like the thing to try.


#11

Any results to report Palerider?


#12
Paul McGowan said They are hand selected fuses we use in the BHK. If you want to upgrade, I recommend only the two ceramic power fuses that are slo blo types. I don't see any advantage in the 4 glass rail fuses.
Uh, maybe one ought to try it first before commenting? I replaced the fuses yesterday in my BHK 250 and BHK preamp, but I did it in this order: 1) 4 glass rail fuses, BHK 250 10A (I assume that's the Igain / back end section), BHK 250 2A (Vgain/front end?), then BHK preamp. Fuses were HiFi Supreme black for the rail fuses, Synergistic Black for all the others. Because I was limited in time before the Spousal Unit (TM) came back, I listened for a half hour to determine a baseline, changed a fuse or set (in the case of the rail), listened to the change, and in the case of the Synergistics then reversed the fuse to see if anything changed.

The first thing I noticed was the dynamics when the rail fuses were changed. My reference recording here is Battlestar Galactica Season 3 track 4 “Storming New Caprica” by Bear McCreary (going out of print in the last few months) The taiko drums and percussion is magnificent. I have Martin Logan Spire electrostatic speakers, a technology not known for dynamics, especially when speaker impedance falls off to ~1 ohm at 20 kHz. the first thing I noticed was the dynamics at the percussion thwacks was much more pronounced with the new rail fuses. (Note, I didn’t bother to reverse the HiFi tuning fuses, as I don’t think they’re directional like the the Synergistics.) Wow! and this was for the BHK 250! (the 300 came out about 2 weeks after I got my 250 and there was no trade-in offered at the time. Plus I couldn’t afford them.) Woohoo!! The 250 rocks!!!

Next, the change of the 10 amp fuse also resulted in improvement. It was even more musical, more alive. Then I swapped direction, and it was all of the above plus a bit more dynamic. I noted the fuse direction for the better-sounding orientation, and then used it for the next two fuses.

Replacing the 2A fuses, both in the BHK 250 and preamp didn’t seem to yield as much of an improvement as the rail or 10A fuses. There was some, but I may have been getting tired at that point.

Anyway, this combination of fuses sounds fantastic. At least to me. YMMV. More of the recordings are coming out. Dynamics are more pronounced on the electrostats (which is tough to do for that technology)

Woohoo!!

–SSW


#13
Streets Still Works said Uh, maybe one ought to try it first before commenting?
Somebody has not had his morning coffee yet.

Did you happen to try changing the 10A and/or 2A on their own, separately from the rail fuses? If so, what was the result?


#14

Sorry, didn’t mean to come across as snarky, was just trying to make the point that the rail fuses actually did make a difference.

No, I didn’t replace the rail fuses with the old ones when I tried the 10A or 2A, but I did replace those one at a time in the order listed. The 10A did seem to make a difference in dynamics, the 2A not as much.


#15

SSW,

I also heard bigger improvements by switching out the rail fuses than the main ones. I did changed out the main fuses first then the rail fuses about 1 month later.


#16

These things are hard to predict.

You did a good amount of testing already. I understand becoming tired of tweaking and wanting to start listening.


#17

Elk, especially when it was sounding so glorious!


#18

Are the four glass rail fuses located inside the covers of the 300s?


#19
stax said Are the four glass rail fuses located inside the covers of the 300s?
No, they're accessible from the rear panel. See http://www.psaudio.com/products/bhk-signature-300-monoblock/#tab-rear-panel They're the fuses inside the four silkscreened boxes near each corner of the rear panel.

#20

Hello,

3 of the 4 rail fuses of my BHK250 blew out due to a faulty input tube try. I currently replaced them with basic fuses but I want to upgrade. From what I read on the forums, I selected PADIS and AMR fuses for their good quality to price ratio.
Problem: it seems these two brands only sell slow blow fuses.
Do some of you know high quality fast blow 10A fuses at decent price?
Thanks in advance.