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10F/8424 & RS225-8 FAST Ref Monitor
10F/8424 & RS225-8 FAST Ref Monitor
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Old Yesterday, 01:08 AM   #1561
phivates is online now phivates  United States
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The racetrack woofers might be smoother in the upper mid than your old school Beyma 8". Looks like a bargain at $42.
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Old Yesterday, 10:01 AM   #1562
perceval is offline perceval  Taiwan
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Quote:
Originally Posted by xrk971 View Post
I was surprised by how affordable the racetrack woofer is from Madisound is $42ea. My concern is that the 84dB SB65 may not be able to keep up with the two woofers. In parallel as 4ohm load, they have about 92dB sensitivity at 2.83v. If we account for a circa 5dB baffle step loss, thatís 87dB at 2.83v. That would match an 87dB 10F or a B80 much more. But then you donít get the nice aluminum dome tweeter like top end of the SB65. Maybe a waveguide can buy +3dB and get the needed 2-3in setback?
There was a nice and gentle downward curve in my sim. and it was about 88dB for the woofers, and 85+dB for the SB65. Should be a very easy speaker to listen to.
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Old Yesterday, 08:49 PM   #1563
xrk971 is offline xrk971  United States
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10F/8424 & RS225-8 FAST Ref Monitor
I just designed a WWMWW with four of the SB15’s and a 5MR450NDY as wide band mid tweeter. It’s a TL with F3 of 40Hz and F6 of 33Hz and solid 90dB at 2.83v and 1m sensitivity after baffle step losses. Seems to look pretty good as 1st order BW XO at 1100Hz electrical but acoustic at 800Hz. This is a custom order for a DIYA member who says he may post a build thread. It sure looks interesting though. Max SPL is 113dB at 33Vrms.

4ft tall x 10in wide x 15in deep. Huge tapered TL vent exit (like PMC) at bottom.

Not surprisingly, the vertical polars look pretty decent.
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Old Yesterday, 10:09 PM   #1564
kornnylike is offline kornnylike  United States
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Originally Posted by xrk971 View Post
I just designed a WWMWW with four of the SB15ís and a 5MR450NDY as wide band mid tweeter. Itís a TL with F3 of 40Hz and F6 of 33Hz and solid 90dB at 2.83v and 1m sensitivity after baffle step losses. Seems to look pretty good as 1st order BW XO at 1100Hz electrical but acoustic at 800Hz. This is a custom order for a DIYA member who says he may post a build thread. It sure looks interesting though. Max SPL is 113dB at 33Vrms.

4ft tall x 10in wide x 15in deep. Huge tapered TL vent exit (like PMC) at bottom.

Not surprisingly, the vertical polars look pretty decent.
Yep just place my order for the SB15.
A gift to myself.

Thanks X
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Old Yesterday, 10:46 PM   #1565
xrk971 is offline xrk971  United States
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Originally Posted by kornnylike View Post
Yep just place my order for the SB15.
A gift to myself.

Thanks X
This will be fun - you might want to start a new thread for this once drivers get in and you start cutting wood.
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Old Today, 12:17 AM   #1566
phivates is online now phivates  United States
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Tell us more, xrk. Did you select the PRV mid/hi? I gotta say four per box came to mind, Elsinore style. My first decent larger system had 5 8" woofers in an ugly column with the Audax 1.5 mid and piezo tweet.
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