ceramic resistor

SSM

Wammer
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Recently perused an older issue of a mag where the reviewer said he put a ceramic resistor between the treble and bass terminals of a pair of Ruark speakers - to attenuate the brightish treble.

The resistor replaced the supplied jumper and the Ruarks were single-wired at the bass terminal end. The result was a smoother treble response.

Question: what is a ceramic resistor? Where can I buy or make one? This seems to be an esoteric device because none of the local dealers I spoke to had any idea about it. If I can use one for the jumpers in my Eposes, it couldsecure me the great treble I need and save me a nice wad of cash from not having to buy a high-end speaker with that "perfect"treble.
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Truth be told, the M12.2 are just sooo right for me in every area, except I'd like a sauver treble unit.

Can it be done? I'm game to experiment.

SS

 

SSM

Wammer
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Glens of Antrim wrote:

Visit one of your favourite urinals & nick the toilet cistern & DIY:sw:
Cute.
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Baron Ochs, if I were to redefine ceramic resistor for you --- it'll bethe brickI'd hurl at you to stop your amorous internet advances.
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Shouldn't you be listening to your Chrisopher HOGwood classical discs?
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SS

 

penance

Wammer
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Aug 18, 2005
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A ceramic resistor is normaly where the resistive element is cased in ceramic, normaly high wattage types. Nothing special TBH.

<edit> Fogot to say, RS stock them.

 

SSM

Wammer
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penance wrote:

A ceramic resistor is normaly where the resistive element is cased in ceramic, normaly high wattage types. Nothing special TBH.<edit> Fogot to say, RS stock them.
OIC:doh:Why on earth did that reviewer have to use such a fancy term then?

Wait, he was writing for HiFi News.
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Ta,

SS

 

mosfet

Wammer
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Jul 20, 2005
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Richard
Ceramic resistor:

62822001.jpg


Also called a wirewound resistor or power resistor. Almost universally used in loudspeaker crossovers to reduce the output of the tweeter relative to the output of the woofer. Placing an additional resistor externally (as described) will further reduce the output of the tweeter. Try values of around 1.0 to 2.2 ohms.

In effect this will modify the crossover solid, you may or may not like the result. RS or Maplin (if they ‘av ‘em in your neck of the woods) will stock the resistors. Use 5 or 7 watt types.

 

meninblack

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He he, this is a fancy way of saying he improvised a tone control which is exactly the same thing but inside the amp.
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"Attenuated the treble response using ceramic resistor jumpers" = "turned the treble down a bit"

But it sounds sooooo much more hi-fi, dahling.

 
M

murray johnson

Guest
although some (Tones?) will laugh, can I just point out that this type of resistor imho sounds utterly horrible and shouldn't be allowed anywhere near an audio signal if at all possible.

By all means try attenuating your tweeter's output if its a bit 'hot' but try to find another better resistor to do it with.

Try some non inductive thick film type or at least some of these Neohm ROX3S metal oxide film resistor types.

R214235-01.jpg


Only about 20p each from RS Components part no 214-2358A. (1 ohm)

 
M

Mr Coherent

Guest
A thick metal film resistor of at least 20watts of good quality should suffice
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