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Hivi domes
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Old 19th September 2018, 03:23 PM   #31
adason is offline adason  United States
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Previously I measured HiVi domes with just 30uF cap to protect...they measured well, but I want to cross the mid dome at 1kHz, not to load it too much. Tweeter dome will remain with 3uF cap, seems like very smooth transition between hivi domes.
So I lowered mid dome cap to 20uF, and used 2nd order filter.
This is how the Hivi domes measure now.
Pretty nice.
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Old 19th September 2018, 03:32 PM   #32
adason is offline adason  United States
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Ok, minor problem is the sensitivity. Peerless 5.5' midbass dome is not sensitive enough. HiVi domes are way more sensitive.
I knew about this, I selected peerless at 4 ohms, while HiVi domes are 7 ohms, so I was hoping to get closer to the sensitivities, but I was wrong. Hivi domes are way more sensitive than I expected.
Well, I can put L-pad on Hivi domes, or I can bi amp it, I do have spare minidsp, or I can select another midbass, I have 6fe200 around...so lots of options.
I will keep playing around to make it as flat as possible.

Btw, the 12" woofer on the picture is not used, it serves just as a stand.
I do plan to use sub eventually, but for now I concentrate on getting the 100Hz to 20kHz as flat as possible.
Cheers.
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Old 19th September 2018, 03:55 PM   #33
DonVK is offline DonVK  Canada
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Looks good.

Did you make the new faceplate for the 2 domes ? You mentioned that you removed the original faceplates.
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Old 19th September 2018, 04:05 PM   #34
adason is offline adason  United States
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I did that to Dayton domes...I do not have pic now, but can make one later, once I am home.
Hivi domes are close enough.
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Old 19th September 2018, 04:15 PM   #35
DonVK is offline DonVK  Canada
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I was referring to the faceplate in post#30 it integrates the two domes very nicely. Is that a stock item?
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Old 19th September 2018, 04:27 PM   #36
adason is offline adason  United States
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Yes, that's how I bought them.
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Old 19th September 2018, 04:59 PM   #37
DonVK is offline DonVK  Canada
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OK thanks, just found it, it's a "TM1A Midrange Tweeter" at Product information:TM1A Midrange Tweeter
and HiVi Tm1 Compact Midrange/tweeter Assembly

No longer generally available, but the faceplate drawings are useful.
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Old 19th September 2018, 05:32 PM   #38
adason is offline adason  United States
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I bought if of ebay...
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Old 19th September 2018, 08:09 PM   #39
adason is offline adason  United States
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Ok, I looked at the link...and it says mid dome impedance is 5 ohm, ok, I though it was 7. Slight difference, but it explains why the output level is higher as I was expecting.
Good to know.
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