Duetta Sig Resistor Upgrade

[BobM]

I've replaced the caps in my Duetta Sigs with a combination of Sonicaps, Auricaps, Multi-caps and kept a few leftover Spragues in there too. In general I have found in the past that mixing and matching cap brands gets me the best results (sonically) to my ears. Going completely with one brand leaves me with the signature of that brand. I have also thrown in some /1uF teflon bypasses on the tweeter circuit. Of course this is all a matter of personal taste.

So now it's time to upgrade the resistors. I plan on using Mills, but I am wondering if I can use the MRA5's (5 watt power handling with 25 watt peaks) or should I step up to the MRA 12's (12 watt power rating with 120 watt peaks)? I am using a high powered McCormack amp that could push 1000 watts into 2 ohms.

Are the MRA 12's overkill or necessary?

Thanks,
Bob

[apogee_admin]

The originals are 10W so go with the 12's

Jon

[analoghaven]

Bob, can you tell me the cost for this upgrade ?
thx

[BobM]

The Mills resistors are fairly inexpensive @ $3-5 each.

The cap's, are definitely a bit more costly, depending on how many Auricaps you want vs how many Sonicaps. I pulled my crossover out into an external box, so I didn't need all those 10uF caps to fit the old space, I went with fewer 20uF's. That saved a bit of extra cost. I did find that bypassing each bundle of caps with one of the new Jupiter Copper caps (.1uF) made a nice improvement in the top end. Oh and removing that selector switch is a must do.

I also got some specialty red varnish and potted the inductors.

[EldRick]

I also got some specialty red varnish and potted the inductors.

IMHO, this is a bigger improvement than the resistors.

Here is my experience with my D-Sig upgrades: http://www.apogeeacoustics.com/oldforum/006406.html