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In Reply to: RE: Oh no, not another Minimus 7 post! posted by electrovice on September 17, 2016 at 15:57:58
John
Change the cap in the crossover to a poly film and you will be rockin.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Follow Ups:
Hi, although the Minimus 7 has been around me my whole life I just got a pair in play because of a new cat in my life. The metal screens cured the claw fear factor for hifi's. There are 3 mod articles I have from Speaker Builder magizine but am curious what you do with the new cap. Mike Samra?
This test was by accident to prove the cost, effectiveness, sound quality and durability of the Shacks Minimus 7.
I was lying down on my futon in front of the TV reading the latest review in Stereophile of the Crystal Cable Arabesque Minissimo Diamond stand mounted monitor. It was only 19,995 bucks before taxes! Even John Atkinson gave it a ho-hum review if you read between the lines. I then looked at my new used Minimus 7's with nary a scratch for 30 bucks on Ebay that with a Parts Express sub sound fabulous!
Then it came on TV. The St. Jude hospital ad and the Shriner ad. These will tear your heart apart. At that moment I began to appreciate simpler things and cherished my good fortune for things that really matter.
The Stereophile hit the floor.
Mike, I do believe my hobby is to get the best sound I can so I'd like to replace that cap....can you recall the value.....thanks. Mark K.
That the crossover schematic Mike posted is for a modified crossover.
If you want to keep your crossover stock (other than changing the electrolytic cap to film), all you'll need is two 4.7 µF caps, one for each speaker.
No sense buying the two 2 µF caps if you're not going to need them.
Hi Shovel, thanks, good eye!
Mike was looking at the mods schematic of which I think there are probably a few. I have the original schematic, stock, and the new one for which Bill Hoffman in 1988 penned down. I wish I had my old scanner so I could send you both the article.
The stock crossover does have the 4.7uF NP electrolytic cap and also a 0.4 mH coil.
Hoffmans mod has also the 2uF cap Mike mentioned,a 3.9uF cap, a 82ohm 1 watt resistor and a 3.5mHy coil. It also has a drawing of the new crossover for slower guys like me to double check.
Mike Samra is always the first to help, a Hifi guru to me, and the smartest guy I know about this stuff. He's always a step ahead so with me you have to start from ground zero and go slow. I haven't even taken the grills off yet.
So Shovel and Mike thanks! I'm going to order what you said Mike and also what Bill Hoffman recommended. Hoffmans last graph on the Minimus 7 showed a very flat response line and claimed +or- 4db from 85Hz to 17kHz....thanks Mark.
What's the PE sub you are using?
Mark,you just need to change the NP electrolytics to film caps..The red Audiophilers that come form AES or the Daytons from parts express work very well.Get a 4.7uf and a 2uf poly in both cases and you are good to go.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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