to Dave..passive sub ?

[dew30296]

I was wondering....the bass extension is so close to complete would a passive radiator such as a Seas sp18r or a ScanSpeak 23w/0-00-02 added to the towers/center would either add the finishing touch or not instead of the port?

[curtis]

Using a passive radiator instead of a port would not effectively give deeper extension.

The frequency response of a passive radiator will be similar to that of a ported cabinet, with two exceptions. The system low frequency roll-off in a passive radiator design will be slightly steeper, and will have a notch (dip) in frequency response due to the Vas (compliance, or stiffness of the speaker cone) of the passive radiator. The goal in designing a passive radiator is to adjust the tuning so that this notch is below audible levels.

http://en.wikipedia.org/wiki/Passive_radiator_(speaker)

[dew30296]

Well..ok..noted..thanks.

[dew30296]

Ok how about this for a thought.... The sierras 1s need stands. How about making them functional with a subwoofer/crossover either powered or unpowered. Giving people with limited room for a separate sub enclosure the bottom end option.

[Blutarsky]

Like this?

http://www.usheraudiousa.com/product...-series/SW-520

Blutarsky

[curtis]

Then why not just build a floorstander?

I wouldn't want a subwoofer built into the stands. Standalone subwoofers allow for better/proper placement in the room for those frequencies.