Motus UH205PW1

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speekerbldr
Posts: 42
Joined: Wed Nov 21, 2012 5:53 pm

Motus UH205PW1

Post by speekerbldr » Tue Nov 04, 2014 1:57 pm

For my current build I decided to take a chance on something I'd barely heard of and knew even less about.

The 8" Motus UH205PW1.

These T/S were taken before any break in so Qm will come up a bit.
Fs: 28.9
Qm: 6.08
Qe: .401
Qts: .375
Vas: 56L (a bit smaller than spec)
Mms: 35g
Dcr: 5.01 ohm

In a 1.6CF box with a 3" dia, 10" long port and .7ohm DCR on the coils this will yield an F3 in the Mid 20's and take about 50W of input before reaching Xmax above Fb (~28hz).

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mattsk8
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Location: Michigan

Re: Motus UH205PW1

Post by mattsk8 » Tue Nov 04, 2014 3:14 pm

Will this be a 2 way design?? If so, what will you be pairing it with? Very interesting!! Keep pics of progress rolling in :)

speekerbldr
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Joined: Wed Nov 21, 2012 5:53 pm

Re: Motus UH205PW1

Post by speekerbldr » Tue Nov 04, 2014 3:58 pm

I thought I'd try somewhat of an 'ultimate' 8" 2 way so it's going to have a TransducerLab N26CR2 tweeter. So far the pair work well in the test box, crossed at about 1600hz. I figured if it's not going to work out, the Motus would work well in a 3 way too.

speekerbldr
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Re: Motus UH205PW1

Post by speekerbldr » Tue Nov 04, 2014 4:11 pm

Here's the 1m on baffle measured response of the Motus 8. The blue line was with the 31" tall test cabinet on the floor, the red line was with the cabinet off the floor a bit, clearly reducing the 250hz "floor bounce." The midrange response looks great. A bit of a resonance peak is visible centered on 3500hz but that was easy enough to filter out.
UH205Cropped.png

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Wolf
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Re: Motus UH205PW1

Post by Wolf » Wed Nov 05, 2014 1:33 am

Nice!!!!!!!!!!!!!!!!
Wolf

isaeagle4031
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Re: Motus UH205PW1

Post by isaeagle4031 » Wed Nov 05, 2014 12:00 pm

Very. Where can you find this driver?

speekerbldr
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Joined: Wed Nov 21, 2012 5:53 pm

Re: Motus UH205PW1

Post by speekerbldr » Wed Nov 05, 2014 12:26 pm

Meniscus carries the 5.25" and has the 8" on order.
There's a PDF for it here: http://motusaudio.com/wp-content/upload ... 7-2012.pdf

Jeff B.
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Re: Motus UH205PW1

Post by Jeff B. » Mon Nov 10, 2014 10:25 pm

speekerbldr wrote:Meniscus carries the 5.25" and has the 8" on order.
There's a PDF for it here: http://motusaudio.com/wp-content/upload ... 7-2012.pdf
That is a really cool looking driver! :o
Jeff's Excel Loudspeaker Design Software
http://audio.claub.net/software/jbabgy/jbagby.html

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