Blown Tweeter & midrange fuses Magnepan 3.6r


My problem is I keep blowing the tweeter fuses at a "somewhat" moderate volume. I inititially owned the Yamaha RV-1103 Surround Receiver and blew both the tweeter fuses at somewhere around 2/3 - 3/4 volume potentiometer setting. I heard that these speakers require a lot of high current. Many people drive these with 40 wpc mono-blocks in a good size room and don't complain of blown fuses.

I purchased a Krell HEAT (Showcase) system (125 wpc @ 8 ohm, doubling to 250 wpc a (Magnepan rated) 4 ohm load. I still have the same problem. In fact I have even blown the 5amp midrange fuses. The maximum power level on the Krell digital amplifier is 100). I set the level at 40 and still blow the tweeter fuses in both channels simultaneously. I have never heard any audible cliipping during these times, however, my hearing rolls off at 14 KHZ. I have had two different KRELL HEAT (Showcase) amplifiers driving them, with same results. I have an open floor plan 20' x 15' listening area and the volume levels are no where near ear-piercing levels. I'm beginning to think I purchased defective speakers. Can you help me?
What do you think ?
dtbrigh

Showing 1 response by sogood51

" open floor plan " this means your room is even larger than 15'x20'. Another thing to know is that your type of speaker does not sound as loud as you guess it is...a spl meter will show you this.

I don't know your Krell amp but I do own a couple of Krell's. My baby Krell (Kav-500) is rated in the same ball-park as yours at 240 watts/4 ohms. The power supply in these little Krells is not enough for your speakers. I have tried mine with my 4 0hm. Apogee Duetta Signatures, while it will play them and sounds very good...high spl's cause it to run out of steam very quickly.

I use a Krell Ksa-250 with my Apogees in my 25'x23' room, it has over 4 times more reserve for those loud moments (which don't sound that loud).

Dave