Eden D210XLT cabinet - fuse value?

[lowell]

Anyone know what this is? It's not stated inside or outside the cab and Eden had me on hold for too long.

[Jazz P Bass]

If I am not mistaken that is a 350 watt cabinet at 4 ohms.
An amplifier that puts out 350 watts at 4 ohms will produce a 37.4 Vac RMS signal.
Voltage / Resistance = Current.
37.4 / 4 = 9.35 amps.
That is the maximum current that the speakers will want to see.
An 8 amp fuse should fit the bill.
Go lower if you want to play it safe.

[lowell]

Thanks JPB... but correct me if I'm wrong - isn't the fuse typically only for the tweeter in such a cabinet? Is the tweeter really rated at that?? I'd guess that a tweeter does not need to be rated as high as a woofer since low frequencies tend to need more current... but maybe my assumption here is wrong. Finally, slo blo or fast?

[MarkusBass]

Isn't it a tweeter protection circuit build using a light bulb? It is described in Eden manual: http://www.eden-electronics.com/info...abs_Manual.pdf page 6 (look for TWEETER LEVEL CONTROL). Such light bulbs are available from several internet stores; in Europe from Thomann.de. I don't remember the exact symbol.

EDIT: you may also read this: http://www.eden-electronics.com/info...weetertext.htm
or this: http://www.swrsound.com/support/manuals/html/bfoot.php

Mark

[Jazz P Bass]

Good call Markus.
I thought the OP was fusing the cabinet.

[MarkusBass]

Being frankly this is just a light bulb used in cars so you may be able to buy it at a gas station. Someting like 24V/ 18W.

Mark

[lowell]

Fyi this crossover has a "fuse holder" it's not an axial lead bulb. ??

[lowell]

Anyway yall I just connected this fuse clip with a wire and the issue is still there anyway. I still need to know about the fuse, but apparently the absence of the fuse is not what is causing the symptom here. The symptom is that when the Eden WTX-500 (Class D) head is plugged into this cabinet there is a ticking sound. Each tick is about 1 second apart. This does not happen with another cab and does not happen with the cab and another head. ??

[MarkusBass]

Such problems are specific to class D amps and it's hard to believe that it is related to a cab. In order to confirm it, you can connect the speaker directly to the amp (excluding the protection circuit). Is it still ticking in this case?

Mark

[Jazz P Bass]

Is the ticking specific to the woofer, the tweeter or both.
It may be a crossover issue.
As to the tweeter fuse, It would not hurt to revove the tweeter & try to ascertain the wattage that it can safely handle.
I would think 1/3 of the cabinet rating should be safe.

[lowell]

The tweeter watts should be 1/3rd of the total cab wattage? Is this a standard? Just curious, I need to study cabs and crossovers a bit more.

[Jazz P Bass]

Open the cab & look at the tweeter.
The wattage should be stated.
The crossover can be checked with a scope & a signal generator.
The power spectrum can be plotted by sweeping the frequency.
Where the crossover starts to pass the signal to the tweeter is important.

[lowell]

I just connected the speaker output of the amp to the woofer without the crossover. It works fine that way. Mark should I still try your suggestion without the protection circuitry? Or does this tell us something?

[MarkusBass]

I just connected the speaker output of the amp to the woofer without the crossover. It works fine that way. Mark should I still try your suggestion without the protection circuitry? Or does this tell us something?

It was not my suggestion to connect the speaker without the protection circuitry. I suggested only to connect it in this way temporarily - just to exclude some part of the circuitry. But you have to solve the problem. You cannot modify the cab and give it back to customer as fixed. I suggest that you draw the schematic of the protection circuitry. How many components you have there - 4 or 6? It will take 3 minutes to draw the schematic. Finally, the tweeter has to be connected - as it was designed by the manufacturer. Otherwise, the cab is not fixed.

Mark

[Jazz P Bass]

You did "prove" that the woofer works
I do not believe it was ever stated what the initial problem with the cabinet was.
Simply a blown fuse?
Was the tweeter ever checked?