x-over resistor replacement query

I am trying to replace a pair of 10W11RJ resistors, but can't find 11 Ohm units in the MOX Wirewound 10 watt Superes Resistors range I am looking at purchasing.
Would it be better to go up or down the Ohm value when replacing non-inductive resistors in x-overs, ie order 10 or 12 Ohm values? Alternatively do I connect a 10 & 1 Ohm resistor in parallel or series to get 11 Ohms?
Will these changes make any discernible difference if any?

Awaiting your feedback.


Duelund which makes better resistors anyway are available in 11 ohm. I have some in my speakers. Try Parts Connexion.Tom
Order 2 ea 22 Ohms or 3 each 33 ohms and place them in parallel for a 11 Ohm value.

Good Listening

You should keep the same resistance 11 ohms. Resistance adds in series. so yes 10+1=11. Peter's suggetion may sound better? It will be more expensive. I would go with the Dueland's if they come in 11 ohm.
I hate resistors in a crossover but if you must use them, the fewer the better.

Bite the bullet and go with the more expensive Duelands. The last thing I'd do is run more of them in series just to achieve a desired value. They may protect tweeters but they also add fine grain and often, a bit of sizzle to the highs.
No resistor is best (agree with Rfogel), Duelund is a superior product to use if a resistor is mandatory.
From what crossover circuit are trying to replace the resistor from?
Mills 12 watt wirewound resistors are an inexpensive alternative and are very high quality sonically. In some places, I prefer them to Duelunds in my speaker crossovers. The Mills are also available in a wide range of 1% values.
I have duelund resistors and have had mills etc in xovers, but one of my favourites is the Caddock MP metal film. The Caddocks sound lifeless and dull for 5-10 hours of burn in then become extremely transparent, low distortion, low noise,nice texture. No brainer. They cost peanuts too. About half the price of Duelund resistors.

But obviously your choice is circuit and taste dependant.
I've used both Mills and Caddocks and agree, either would be a good alternative to the more expensive Dueland.
There is no direct answer to your question. If the resistor is in the tweeter pad or baffle step, changing the value will change the volume of the tweeter, so your speakers character will clearly change, If it is impedence compensation, it will change how much your impedance peak is lowered, depending on frequency, you might or might not notice, if it is in a notch filter, it would change how much peak is reduced and also would be audible. As stated by others, without taking considerable measurements, I would suggest that you follow the original design.
I hope this helps, Tim
Regarding the Caddock metal film, probably not a great idea to replace a 10W resistor with a 2W one. Depending on where it is in the circuit it may be fine, but then again may not.

There are a few 11ohm options, the Dueland and also Parts Express has the inexpensive sand cast inductors in 11ohm. You can also 'make' 11ohms as mentioned, but series or parallel connection. The Parallel option would be better because you also get more power handling that way.

depending on the series or the addition of a heat sink the Caddocks can take 20w or even 25w so shouldn't be a problem.