EXTREMIS 6.8 woofer

[leon]

Has anyone tryed the EXTREMIS 6.8 woofer?
I am considering them for a 2-way configuration.

Mid woofer driver
:: 7" cut out
:: Licenced XBL^2 motor
:: Neo motor Fully shielded
:: 7.02 ohm
:: 86db/w/m
:: 30-6khz

Fs - 30 Hz - BL - 9 N/A
Qms - 2.54 - Xmax - 13mm one way
Qes - .383 - Sd - 140 cm2
Qts - .332 - Vd - 364 cm³
Vas - 33.2 liters -Le - 0.13 mH
SPL - 86 dB @ 1W, 1m - Re - 7.02 Ohms
Power 100W RMS/300W Peak

QUOTE FROM ADIRE:
Our entries in the high end of midwoofers. Designed to take on - and beat - drivers like the legendary ScanSpeak 8545, Seas Excel offerings, and other high-end European drivers the Extremis units simply takes everything to another level.

Can this be true?

[chrissmith]

Provided Link: Extremis MT (http://www.htguide.com/forum/showthread.php4?t=12992)


> Has anyone tryed the EXTREMIS 6.8 woofer?
> I am considering them for a 2-way
> configuration.

> Mid woofer driver
> :: 7" cut out
> :: Licenced XBL^2 motor
> :: Neo motor Fully shielded
> :: 7.02 ohm
> :: 86db/w/m
> :: 30-6khz

> Fs - 30 Hz - BL - 9 N/A
> Qms - 2.54 - Xmax - 13mm one way
> Qes - .383 - Sd - 140 cm2
> Qts - .332 - Vd - 364 cm³
> Vas - 33.2 liters -Le - 0.13 mH
> SPL - 86 dB @ 1W, 1m - Re - 7.02 Ohms
> Power 100W RMS/300W Peak

> QUOTE FROM ADIRE:
> Our entries in the high end of midwoofers.
> Designed to take on - and beat - drivers
> like the legendary ScanSpeak 8545, Seas
> Excel offerings, and other high-end European
> drivers the Extremis units simply takes
> everything to another level.

> Can this be true?

Check out this link about an Extremis 2 way design..
Cheers

[thomasw]

http://www.htguide.com/forum/attachment.php4?attachmentid=1989&stc=1


If you need a little woofer they work fairly well. They aren't as low distortion as one would think from the ad copy.

Here's a post with some independent testing data.
<A HREF="http://www.htguide.com/forum/showpost.php4?p=146676&postcount=1">http://www.htguide.com/forum/showpost.php4?p=146676&postcount=1</A>

Here's a thread about a 2-way using the Extremis
<A HREF="http://www.htguide.com/forum/showthread.php4?t=12992">http://www.htguide.com/forum/showthread.php4?t=12992</A>

[davidyohn]

I've been living with them in a 2-way with Morel tweeters for over a year now and I love them. Exceptionally clean and clear midrange, powerful bass, in-room response into the mid-20's in a TL enclosure. Highly recommended.

> Has anyone tryed the EXTREMIS 6.8 woofer?
> I am considering them for a 2-way
> configuration.

> Mid woofer driver
> :: 7" cut out
> :: Licenced XBL^2 motor
> :: Neo motor Fully shielded
> :: 7.02 ohm
> :: 86db/w/m
> :: 30-6khz

> Fs - 30 Hz - BL - 9 N/A
> Qms - 2.54 - Xmax - 13mm one way
> Qes - .383 - Sd - 140 cm2
> Qts - .332 - Vd - 364 cm³
> Vas - 33.2 liters -Le - 0.13 mH
> SPL - 86 dB @ 1W, 1m - Re - 7.02 Ohms
> Power 100W RMS/300W Peak

> QUOTE FROM ADIRE:
> Our entries in the high end of midwoofers.
> Designed to take on - and beat - drivers
> like the legendary ScanSpeak 8545, Seas
> Excel offerings, and other high-end European
> drivers the Extremis units simply takes
> everything to another level.

> Can this be true?

[ryno]

> another

<A HREF="http://home.twcny.rr.com/cnydga/extremis.html">http://home.twcny.rr.com/cnydga/extremis.html</A>

Has anyone tryed the EXTREMIS 6.8 woofer?
> I am considering them for a 2-way
> configuration.

> Mid woofer driver
> :: 7" cut out
> :: Licenced XBL^2 motor
> :: Neo motor Fully shielded
> :: 7.02 ohm
> :: 86db/w/m
> :: 30-6khz

> Fs - 30 Hz - BL - 9 N/A
> Qms - 2.54 - Xmax - 13mm one way
> Qes - .383 - Sd - 140 cm2
> Qts - .332 - Vd - 364 cm³
> Vas - 33.2 liters -Le - 0.13 mH
> SPL - 86 dB @ 1W, 1m - Re - 7.02 Ohms
> Power 100W RMS/300W Peak

> QUOTE FROM ADIRE:
> Our entries in the high end of midwoofers.
> Designed to take on - and beat - drivers
> like the legendary ScanSpeak 8545, Seas
> Excel offerings, and other high-end European
> drivers the Extremis units simply takes
> everything to another level.

> Can this be true?

[jeffreynixon]

> I built Roman's Extremis 2-way and have been extremely pleased with it. Although it will fill up my 18 x 18 (plus some other openings to rooms and vaulted ceiling)room, it really shines with near field imaging.
>
>

[romanbednarek]

http://www.rjbaudio.com/Extremis/Extremis%20blueprint.jpg

Provided Link: RJB Audio Projects - Extremis (http://www.rjbaudio.com/Extremis/extremis.html)


> Has anyone tryed the EXTREMIS 6.8 woofer?
> I am considering them for a 2-way
> configuration.

> Mid woofer driver
> :: 7" cut out
> :: Licenced XBL^2 motor
> :: Neo motor Fully shielded
> :: 7.02 ohm
> :: 86db/w/m
> :: 30-6khz

> Fs - 30 Hz - BL - 9 N/A
> Qms - 2.54 - Xmax - 13mm one way
> Qes - .383 - Sd - 140 cm2
> Qts - .332 - Vd - 364 cm³
> Vas - 33.2 liters -Le - 0.13 mH
> SPL - 86 dB @ 1W, 1m - Re - 7.02 Ohms
> Power 100W RMS/300W Peak

> QUOTE FROM ADIRE:
> Our entries in the high end of midwoofers.
> Designed to take on - and beat - drivers
> like the legendary ScanSpeak 8545, Seas
> Excel offerings, and other high-end European
> drivers the Extremis units simply takes
> everything to another level.

> Can this be true?

I built the design below when that driver first came out. I wouldn't say that it has the clarity of its more expensive competition but it has a bottom end that defies belief in a small ported enclosure. You sacrifice sensitivity (80dB) but get an f3 of close to 30 Hz. Also that driver doesn't "compress" like a lot of non XBL motors do and as a result they don't sound harsh when you crank them way up.