Author Topic: 200 Speakers - How to silence  (Read 170 times)

Offline WurlieNewbie

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200 Speakers - How to silence
« on: February 05, 2020, 08:09:52 PM »
Hey all... My 200 sits in my office and there are times when I want to silence the speakers and just play with headphones.  Since the headphone jack on the Wurli is mono, I plan on going through the LINE OUT into a small mixer that has stereo headphones (mixer has onboard FX so that's a plus too).

Question: to mute the onboard speakers on the Wurli, can I simply take a 1/4" cord and plug one end into the headphone jack, leaving the other end disconnected?  I wasn't sure if some resistance was needed for the jack and didn't want to fry anything.

Thanks!

Offline pianotuner steveo

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Re: 200 Speakers - How to silence
« Reply #1 on: February 06, 2020, 06:23:53 AM »
No, you don't need to do that.
Just use the headphone jack to plug into the mixer, then use the volume control as a trim pot. Yes, this is safe, plus you are not modifying anything. Keep the volume control pretty low on the Wurli so it doesn't distort.
« Last Edit: February 07, 2020, 06:30:52 AM by pianotuner steveo »
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...

Offline WurlieNewbie

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Re: 200 Speakers - How to silence
« Reply #2 on: February 06, 2020, 01:10:27 PM »
Thanks for the reply.  Just for my curiosity, is there a reason why you shouldn't plug a cord into the headphone jack?

Offline sean

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Re: 200 Speakers - How to silence
« Reply #3 on: February 06, 2020, 02:14:15 PM »

All the schematics that I have for the 200 and 200A show that using the headphone jack will insert an 8Ω 5-watt resistor into the amplifier output circuit.

Looks to me that you could safely jam a kitchen knife into the headphone jack without hurting the amp.


Sean

Offline cinnanon

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Re: 200 Speakers - How to silence
« Reply #4 on: February 06, 2020, 08:56:40 PM »
You can 100% plug a dummy plug into the headphone jack to safely disable the speakers with nothing on the other end. Just put an 1/8” female to 1/4” male adapter plug in there. There’s an 8 ohm 5 watt resistor that becomes “in-circuit” when anything is plugged in. Check if that resistor is still there though. I have seen it removed on rare rare occasions. It will look like a rectangular block almost an inch long.
« Last Edit: February 06, 2020, 08:59:11 PM by cinnanon »

Offline pianotuner steveo

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Re: 200 Speakers - How to silence
« Reply #5 on: February 07, 2020, 06:26:43 AM »
Ok, if that resistor is still there that should work, but, having tried both jacks with a mixer or PA, most of the time, in my experience, the end result sounded better by plugging into the headphone jack, and not the line out. Even using the trim pot, the result always sounded better by using the headphone jack, and using the volume control for trim.

Another thing you can do, but they may be hard to find, is to get a pair of stereo headphones with a mono switch.That will send the signal to both sides. You can also modify a pair of stereo phones, but then they will only be mono. A whole other story.
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...