Originally Posted by madhuski
Thanks - I've been pondering wether to buy a subM or the passive funk. I really like the size/WAF of the funk, but the issue you brought is one of my major hang ups.
So what would be the downside of putative a passive sub into a room (and not measuring) compared to a sub that's allready had dsp applied to it (like the seaton or a psa sub, for example)?
Generally speaking, a powered sub will have an EQ (or a few EQ's, I think the SubM has 2 or 3 presets?) tailored to the specifics of the overall driver/box/amplifier combo so that the end user doesn't have to worry about doing this themselves. On top of this the protection circuitry has also been pre-defined/configured to protect the driver from abuse.
With a passive sub, you have to EQ the low end yourself either by way of a low shelf filter or L/T implementation, and if you don't know what you're doing you could do more harm than good and I'm not sure how you'd even know how much to boost and where. Further, there is no protection for the sub itself, and if you can't measure it and/or don't know the specific parameters of the sub, don't really know how to protect it.
Given that the 18.0 is sold with its own amp, I would imagine Nathan can assist with helping setup the settings on the iNuke to mimic what a pre-installed amp would otherwise have had.
Having said that, that is likely part of what you'd otherwise be paying for by buying the powered version, plus given the number of different amps and DSP's available, it may not be feasible for Funk to offer this assistance (not to mention the potential liability should the driver get damaged and the owner attempt to blame the settings he was recommended to use).
Having said all that, it is a sealed sub so likely not as susceptible to damage as would be a driver in a ported enclosure. Heck, there was another sub/speaker manufacturer who sold passive subs and simply let Audyssey do whatever it thought it needed to to EQ the sub, and I didn't hear too many issues of damage to those subwoofers. So what do I know.
I do know that if I was incapable of measuring subs or understanding how to best EQ it, I'd probably lean more towards active systems than passive systems.
Funk makes some awesome looking and capable subs though, so you could always shoot Nathan or whomever (I've always dealt with Nathan so not really sure if he has anyone else there that services customers) and ask before you buy! Especially if the form factor is what you are looking for.