cabinet shape - Spica TC-50 only with FR - diyAudio
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Old Yesterday, 08:08 PM   #1
sdep777 is offline sdep777  United States
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Default cabinet shape - Spica TC-50 only with FR

When the Spica TC-50 was in it's heyday it got incredible reviews

Absolute Sound Spica TC-50 May 1994, vol 19, issue 95
Audio Magazine Spica TC-50 March 1984 pdf
The Audio Critic Spica TC-50 No. 16 Spring / Fall 1991 pdf

I never heard one and now this is another cabinet shape I am considering to build around a Full range unit.


Any opinions on using this Shape as a Modern day Full Range speaker system ?


mostly looking at all the different shapes and not many untried cabinet shapes left is there ?

which would indicate to me that most of the major possible improvements in Speaker design will be from Transducer Improvements....Correct ?

Improvements that could be incorporated ?

Maybe not worth the bother ?
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Last edited by sdep777; Yesterday at 10:11 PM.
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Old Yesterday, 08:11 PM   #2
rayma is online now rayma  United States
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Originally Posted by sdep777 View Post
When the Spica TC-50 was in it's heyday it got incredible reviews I never heard one and now this is another cabinet shape I am considering to build around a Full range unit. Any opinions on using this shape as a Modern day FR unit ? Maybe not worth the bother ?
At the time when I hear them, they seemed mediocre at best.
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Old Yesterday, 08:30 PM   #3
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We used to sell them. Good for the money in the day.

The purpose of the shape was, with the XO, to get good time alignment of the woofer & tweeter.

The shape is good for internal standing waves, the extreme angle means you'll need weird placement or you'll be listening way off axis.

dave
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Old Yesterday, 08:30 PM   #4
chrisb is offline chrisb  Canada
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While they might not have equaled the bombast of some of the larger 2 & 3 ways in the mainstream retails shops back in the day, I wouldn't have described them or the SC50 (whose shape I preferred ) as "mediocre".

But the real question is regarding enclosure shape - I would imagine that appropriately sized so as to not create issues with early reflections intermodulating the lighter weight cones of some current FR drivers , such as Jordans, or Alpairs, there's now reason not to try - after all, most DIYers' time and a few square feet of plywood are cheap enough .

edit: Dave beat me to it - I owned a pair of the SC50s, never actually sold them.
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Old Yesterday, 09:04 PM   #5
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Originally Posted by sdep777 View Post
Maybe not worth the bother ?
Ding! If this is your first full range build, stick with a proven design. A Planet_10 trapezoid design would be enough of a challenge me thinks. IMHO of course.

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I owned a pair of the SC50s, never actually sold them.
Where did they go?

jeff

Last edited by vinylkid58; Yesterday at 09:16 PM.
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Old Yesterday, 09:19 PM   #6
sdep777 is offline sdep777  United States
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I can do the cabinets no problem just wonder if it would be a killer setup or a flop
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Old Yesterday, 09:23 PM   #7
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As has been suggested, the extreme from baffle angle would be unwanted with most modern single full range drivers. What drivers were you interested in?

jeff
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Old Yesterday, 09:26 PM   #8
sdep777 is offline sdep777  United States
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Most likely the BMR 3.5" at PE

mostly looking at all the different shapes and not many untried cabinet shapes left is there ?

which would indicate to me that most of the major possible improvements in Speaker design will be from Transducer Improvements....Correct ?


I am very good with woodworking so cabinet angles and such are no problem

Last edited by sdep777; Yesterday at 09:48 PM.
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Old Yesterday, 09:30 PM   #9
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I owned a pair back in the late eighties (tc-50)actively crossed to large subs ;one of the best setups ive ever had. I thought the slope of the baffle was used in conjunction with a 2nd order bessell crossover filter to optimize either phase or off axis polar response or maybe both.


mark
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Old Yesterday, 09:33 PM   #10
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Tectonic Elements Ltd.?

jeff
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