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Module out jack [message #13707]

Thu, 20 May 2010 19:08

Van
Messages: 134
Registered: April 2004

Senior Member

I finally got to try the module out jack on the back of my K 250-4.
I'm guessing it's just a pre-amp out, right?

Well, I was browsing Craig's List the other day and came across a couple of speaker columns cheap. Poor condition.
One had an amp in the bottom of it.
Long story short, I was able to make one complete unit from the pair.
It's a Yamaha PS-100.
Can't find any information on it anywhere.

8-8" speakers and a power amp that I'm guessing is 100 watts.

I cleaned it all up, new grill cloth, paint and rewired as necessary.

I plugged this into my Module output, switched it on.
Holy crap! LOUD and very clear sound.

If anyone has information on this monster, please let me know!
Thanks.

FRONT

http://i986.photobucket.com/albums/ae341/vandenmike/front.jpg

BACK

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Re: Module out jack [message #13709 is a reply to message #13707]

Thu, 20 May 2010 20:16

Van
Messages: 134
Registered: April 2004

Senior Member

http://i986.photobucket.com/albums/ae341/vandenmike/plate.jpg

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Re: Module out jack [message #13715 is a reply to message #13707]

Fri, 21 May 2010 05:49

stevem
Messages: 4775
Registered: June 2004
Location: NY

Senior Member

If you send of an email to Yamaha customer service I would bet that they could set you up with where to find a archive onwers manual on there site.

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Re: Module out jack [message #13721 is a reply to message #13715]

Fri, 21 May 2010 10:35

Van
Messages: 134
Registered: April 2004

Senior Member

Thanks.
Yeah, I went to their site, but the closest I could find is the PS-100B that doesn't match completely.
I completed a form and am awaiting a reply.

I found a guy in Austrailia that has a pair, but he couldn't offer me any information.

Extremely rare piece.

Any idea on the module out on the K 250-4's specifications?

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Re: Module out jack [message #13723 is a reply to message #13707]

Fri, 21 May 2010 12:32

stevem
Messages: 4775
Registered: June 2004
Location: NY

Senior Member

That jack Taps signal off of the first gain stage of the output driver board.
I think it outputs close to zero DB which should be enough to drive that Yamaha to close to max output.

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Re: Module out jack [message #13726 is a reply to message #13723]

Fri, 21 May 2010 12:39

Van
Messages: 134
Registered: April 2004

Senior Member

Oh, it drives it GREAT!
Heck, it's louder than the 4 12 bottom!

One spec on the amp I found says something like input should be
-6dbm (?) for maximum volume.

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Re: Module out jack [message #13727 is a reply to message #13707]

Fri, 21 May 2010 12:44

stevem
Messages: 4775
Registered: June 2004
Location: NY

Senior Member

- 65 DB is mic level, if you drive that with the Kustom you will blow out that Yamaha`s 1st gain stage.
If it does only need -65 DB you can Y cord your guitar right into it.

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Re: Module out jack [message #13728 is a reply to message #13707]

Fri, 21 May 2010 12:46

stevem
Messages: 4775
Registered: June 2004
Location: NY

Senior Member

Forget what I just posted, I put my glasses on and saw you posted -6 DB, so alls well.

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Re: Module out jack [message #13734 is a reply to message #13727]

Fri, 21 May 2010 17:08

Van
Messages: 134
Registered: April 2004

Senior Member

Yamaha wrote me and said that it's too old and they no longer have information on it.

The same amp is in their 100B model, and it states the input's nominal level is -6 dBm (.039 Vrms)Impedance 10 Ohm.

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