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Old 9th May 2012, 07:15 PM   #1
diyAudio Member
Join Date: Apr 2012
Location: Texas, U.S.A.
Default OT impedance help: 9.8 vs 8k

Hi! First post!
I will be building a Decware se84 SET but they are not offering the kit anymore but they provide links for the parts. I know the pre-built unit has a transformer primary impedance of 9800 ohms. For their kit, they recommend an Edcor 8k. Same 6 ohm secondary. what would be the difference between the two? Which is better? My speaker is 4-ohm full range.
Thank you.
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Old 9th May 2012, 07:50 PM   #2
rmyauck is offline rmyauck  Canada
diyAudio Member
Join Date: Apr 2009
!0K should give lower distortion at a slight power loss. They do now make !0K primary OPT's

EDCOR - GXSE15-6-10K

This one is $11 less, as it's smaller, but will have less bandwidth especially if you parallel the amp as mentioned for almost double the power.

EDCOR - GXSE10-6-10K

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Old 9th May 2012, 09:30 PM   #3
diyAudio Member
Join Date: Apr 2012
Location: Texas, U.S.A.
Thank you for the reply.
Do you know the primary current handling for these Edcor transformers? The reason I'm asking this is at Electraprint, they want the primary current requirement when you order from them.
I have studied the schematic carefully, comparing it with my actual factory-built unit. I noticed that my unit doesn't have the pair of 3.3uf Solen poly cap that connect to each 47k plate resistors. What are these caps for? Can I install one?
I have emailed Steve but he didn't respond.
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