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Old 3rd April 2012, 02:05 AM   #1
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Default BetsyK in OB

Hi All,
Paul sold me some BetsyK's in lieu of Betsy's since that is what he has in stock. My initial plan is to build and OB with them. Paul informed me using 36g wire should push the Qts of the BetsyK up to same as the Betsy.

I found only 30g wire at Radio Shack. I'm looking for any information others may have with BetsyK's in single drive OB. What size wire did you use? I can buy a spool of 36g off internet but would like to avoid that.

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Old 3rd April 2012, 02:53 AM   #2
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I have an unused pair of Betsys, was needing K's.
No open baffle Q projects planned. Want to swap?
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Old 3rd April 2012, 12:56 PM   #3
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Thanks but I decided I'd take'em as I'm interested in the highter sensitivity and the K's are more versatile. I may also try a TL version. But I might come back to you if I decide I definitely want to try the non-K version.

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Old 6th April 2012, 01:40 AM   #4
pjanda1 is offline pjanda1  United States
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You could try the 30g, but a longer piece. The Radio Shack set has 200ft of 30g, after all. Heck, maybe 30g is what I had in mind all along. Try a few different lengths.

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Old 7th April 2012, 12:33 PM   #5
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Default Got the wire from Radio Shack

Hi Paul,
I picked up exactly that wire set from Radio Shack. I'm using the 30g right now but haven't tried a longer length yet.

Just finished putting the BetsyK's into some quickly built OB's. For simpliciy I simply picked up some 2'X4' MDF panels from Home Depot. I cut a third panel to make 1' X 4' rear braces to stand it up. The wide width of the baffle allows me to try inserting a OB sub if I want to experiment with various ways to augment the bass response.

Initial impression are these through a wide detailed sound stage compared to my JX92's in MLTL. The mids are really nice. The treble is a little harsh which may be break-in or placement/orientation challenges in this smallish room. And of course, the bass does not reach down to the 20Hz of my MLTL's but it's very listenable.

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Old 17th April 2012, 02:41 AM   #6
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Default BetseyK breaking in nicely

Well, the BeseyK's are breaking in and sounding quite nice. With about 7' of twisted 30g wire I'm getting usable bass down to 50Hz using cheap RS SPL meter and pink noise sources which surprises me. Not bad.

Hz dB/BetseyK
25 -13
32 -11
40 -7.5
50 -3.5
62 -0.5
80 1.5
100 2
125 1.5
160 -0.5
200 -1.5
250 -0.5
315 -1
400 0
500 -0.5
630 0
800 0
1000 0
1300 1
1600 1.5
2000 2
2500 3.5
3200 4
4000 4
5000 3
6400 3.5
8000 2
10000 1
13000 -5.5
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Old 19th April 2012, 11:11 PM   #7
nesha is offline nesha  Serbia
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Hi, Cpmiller, I'm happy user of BetsyK. I couldn't find any harshness in the treble, in the begining and now ( after a month, they are still in the runing-in proces). It could be your source or amp.
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Old 20th April 2012, 02:48 AM   #8
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Hi Nesha, thanks for your reply. I'm glad to know you are a happy user of the BetsyK. How are you listening to them? Do you have have them in an enclosure or are you using them OB also?

Most speakers take some time to break in. Also, the Betsy's exhibit a treble rise above 1K Hz that is greater than my JX92S's (my reference full range for the last two years) which I believe my ears notice. It took a fair amount of time for my JX92's to break in.

I continue to be quite moved by the large and detail sound stage of the BetsyK's in OB configuration.

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Old 20th April 2012, 05:30 AM   #9
nesha is offline nesha  Serbia
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BetsyK ML-TL and TQWT
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Old 20th April 2012, 12:19 PM   #10
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I just read the thread of your build. Did you build both a ML-TL and TQWT version? I see the photo's of only one design. Very nice. I like the proportions of the cabinet. I wish I could listen to your speakers!
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