fuses - the $39 ones or the 85 cent ones

Pubul57,

The ones I have are Bussmann's ABC. Below are the specs for the 4Amp fuse I use for the mid-range driver that I got from Master-Carr. It doesn't mention whether it is sand-filled or not. I also have the 2.5Amp fuse for the tweeter, and that one is also sand-filled.

Part Number: 71385K29

UL Specification :: Listed
Bussmann Type :: ABC
Littelfuse Type :: 314
Ferraz Shawmut Type :: GAB
Available Amps :: 4
AC Voltage Rating (VAC) :: 250
Fuse Type :: Fast-Acting Fuse
Ceramic-Tube Fuse Type :: Fast Acting
Fast-Acting Fuse Type :: Ceramic-Tube Fuse
Visual Indicator :: Without Visual Indicator
AC Interrupt-Current Rating :: 10,000 @ 125 VAC
DC Interrupt-Current Rating :: 10,000 @ 125 VDC
Diameter :: 1/4"
Overall Length :: 1-1/4"
Specifications Met :: Underwriters Laboratories (UL)

Thank you.

Kirkus...OK. I will try your kind of experiment. The easiest way to do it would be to simply "slap the mic cable around" which goes from an actual mic to my Behringer DEQ2496 spectrum analyser. The analyser is very sensitive and will show sound levels below what is audible when I play my system. I will stuff the mic under a cushon so that the slaps won't be picked up acousticly.

And about the sand, another reason is to prevent violent destruction of the fuse body if it blows. Safety issue.

Be careful, Eldartford -- feedback!! Gain's got to be pretty cranked, and the cushion as you well know is most effective at higher frequencies. Please don't blow something up trying this out . . . the terminating resistor is the best way to be safe to your gear.

Isanchez,

I am sure you heard what you heard and liked what you liked with respect to these various fuses.

1. How long did you leave the fuses in place with current across them for your evaluations? I found that the HiFi Tuning fuses took quite a while to settle down in my amp - much (many days) longer than the amp usually takes to settle down after a cold start.

2. I don't recall if you mentioned anything about directionality in your test. Did you swap directions at all with HiFi Tuning fuses to see if if made a difference?

3. It is entirely possible that the Buse fuses work better to your ears in the Maggies, but may have a completely different sonic signature in a power amplifier. Has anybody tried these fuses in a power amp and compared them to Isoclean and/or HiFi Tuning fuses? In a pre amp or digital equipment?