car audio sub, home audio environment

[Guest]

<font color='#000000'>I have a really nice sub, and Image Dynamics ID MAX 12. I have had my system stolen too many times out of my car so I want to use some of my equiptment in my home. So my question is what kind of amp would be best (for the least amount of money) to power this sub. I have a sealed box for it now, but it seems that everyone uses bass reflex for home audio stuff. Is this because it is more efficient and slightly louder in certian frequencies? Isn't a sealed box more likely to reproduce a flat wave, e.g. better sound quality. The sub is about 30 pounds and can take anywhere from little to 1000 watts rms. It is relatively efficient at 92 db.

Any advice would be greatly appreciated.</font>

 

[annunaki]

<font color='#000000'>I have a really nice sub, and Image Dynamics ID MAX 12. I have had my system stolen too many times out of my car so I want to use some of my equiptment in my home. So my question is what kind of amp would be best (for the least amount of money) to power this sub. I have a sealed box for it now, but it seems that everyone uses bass reflex for home audio stuff. Is this because it is more efficient and slightly louder in certian frequencies? Isn't a sealed box more likely to reproduce a flat wave, e.g. better sound quality. The sub is about 30 pounds and can take anywhere from little to 1000 watts rms. It is relatively efficient at 92 db.

Any advice would be greatly appreciated.</font>

The IDMAX is a pretty capable, fairly linear, woofer. PM TLS Guy as he has modeled a vented enclosure for someone in your situation.

In a car, sealed enclosures tend to offer the flattest response due to the huge amount of transfer function from the small operating environment.

In a home, a sealed enclosure is definitely possible, but an eq will be necessary along with a large amount of clean linear excursion, large amounts of unclipped power on tap, and very low power compression. In other words, not a lot of woofers fit this bill. The best way around that is with a vented alignment.

The transfer function or "room gain" is simply not the same in the home. It does not increase low end response in upwards of 20+db like in most vehicles. Vented enclosures allow deeper low end response in the home in most applications as they do not start to roll off response (in most cases) until below their tuning frequency. Sealed enclosures begin rolling off response, though much smoother, at the system's (enclosure & woofer combined) resonance point usually 45hz-30hz (dependent upon the woofer it self) with an overall system qtc of .707 or so.

 

[TLS Guy]

The IDMAX is a pretty capable, fairly linear, woofer. PM TLS Guy as he has modeled a vented enclosure for someone in your situation.

In a car, sealed enclosures tend to offer the flattest response due to the huge amount of transfer function from the small operating environment.

In a home, a sealed enclosure is definitely possible, but an eq will be necessary along with a large amount of clean linear excursion, large amounts of unclipped power on tap, and very low power compression. In other words, not a lot of woofers fit this bill. The best way around that is with a vented alignment.

The transfer function or "room gain" is simply not the same in the home. It does not increase low end response in upwards of 20+db like in most vehicles. Vented enclosures allow deeper low end response in the home in most applications as they do not start to roll off response (in most cases) until below their tuning frequency. Sealed enclosures begin rolling off response, though much smoother, at the system's (enclosure & woofer combined) resonance point usually 45hz-30hz (dependent upon the woofer it self) with an overall system qtc of .707 or so.

Here is your model. You can see it makes a pretty decent sub.