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HELP AFTER MY MODS, My tweeters are subdued and weak-

So I have a pair of Mirage M1 speakers, I changed the caps in the crossovers to Jantzen Superior Z (for the tweeters) and standard z for the mids and bass.
 
I also changed the internal cabling to Supra Classic 2.5.

First Impressions-  Not burned in yet
The highs are there but really recessed in the background. Theres a song I reference and it has a steel guitar solo, I can bearly hear it through the vocals because its seems recessed so far back.

SO HERES THE QUESTION- Is that a symptom of unburned in cables and or caps, or is that just what Supra cables give you?

When I changed the internal cabling a few years back on the same model speaker, I used DH LABS t14 Silver plated cable, This had the opposite effect, it was super bright and fast, but it smoothed out and the brightness relaxed, leaving a lot of detail but not so much your ears bled.

But here its the opposite, its dull on the top end and the vocals kind of take over and blur out the top end.

idahifi
erik_squires
5,268 posts
 
Hi Idahifi,

I think I know what happened. You removed electrolytic shunt caps without taking into account the reduced ESR.

The easiest way to fix this is to replace the original shunt caps. By shunt, I mean caps that go towards ground, and are not in series with the driver.

If you have the right measurement tools, like DATS or REW with the right jig, you can measure the original caps, and compensate for the low ESR with added resistance in series.

It is particularly difficult to find this issue for most because the problems tend to occur where you don't expect it. That is, the treble droop happens because of something you did in the midrange filter circuit.

This problem also occurs with series caps, but changes there tend to be much more subtle, it's hard to go entirely wrong. The shunt caps, having the ability to create a short to ground, are the most troublesome.

Best,


E
idahifi OP
100 posts
 
Eric thanks for your response,.
So I can still hear the tweeters but I it seems like certain frequencys it sounds laid back and I can almost not even hear it. Is this consistent with what your talking about. I must admit it's a bit over my head, what your saying. I did replace tow of three of the mid-range caps, as well as three of the five tweeter caps.
Would you place the mid caps back in to see if it improves?
shadorne's avatar
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shadorne
7,333 posts
 
+1 What Erik said
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