Speaker emulation (for evaluating mixes)

I do all my recording, arranging, and mixing on headphones. I have speakers, but don't use them in my current house.

I'm therefore wondering if there's a way to quickly hear a mix on different virtual speakers within Sonar. Is there a set of presets in one of the audio FX plugins that I can use to hear the mix with lows and/or highs dropped, etc.?

You can also try...

TB Isone: http://www.toneboosters.com/tb-isone/
112db Redline Monitor: http://www.112db.com/redline/monitor/

The Tonebusters plugin is less expensive then the 112db Redline, and (in my opinon) just as good or even better.

I have to make one remark.. While all given solutions (Focusrite VRM box included) are useful as a broad guidance to the direction your mix must sound, nothing can beat real monitors in a good treated room or studio.

If you -however- have no space* (or money, because it is not cheap) for a good listening room and good monitors, the above is the second best option. Keep in mind you have to use "colorless" headphones (giving a flat as possible frequency response without boosts). A good headphone is not cheap, but if you are on budget you have to do some searching. I have used a cheap Roland RH200S for this purpose, but the AKG-121 or AKG-141 MKII are also cheap and usable.

    *- Here in the Netherlands space is expensive. Even the rent of a simple flat with only one living room, a bedroom and a kitchen can easily be 1/3 of a average income - or more if you live in one of the (relatively) bigger city's (and that's from house corporations - the rent of the "free market" flats are most times far out of reach of people with a average or lower income). And that is just the rent without the costs of gas, water, electricity, telephone etc. - these have to be paid separately. So - a special extra "music" room can be a very expensive option.