Author Topic: Wurlitzer speaker impedence  (Read 3798 times)

Offline cinnanon

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Wurlitzer speaker impedence
« on: May 14, 2014, 07:23:14 PM »
I thought I came across this topic years ago, but now I can't find it.

I've heard that Radioshack used to make a 4"x8" 4 ohm speaker and I think I found a pair at a local flea market (whatever they are, they are about 4 ohm each.

I know that the normal 200 series speakers are 16 ohm speakers wired in parallel, equivalent to 8 ohms impedence.

What if I were to wire these two 4-ohm speakers in series to yield the same 8 ohms that the amp sees. Would the speakers be the same volume? Would the amp notice the difference? Distortion? Would there be any difference?

Thanks in advance

Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #1 on: May 15, 2014, 10:26:09 AM »
I'm not an expert, but that sounds fine to me. The speakers should not distort unless they are blown, or the amp has excessive distortion.
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 cinnanon

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Re: Wurlitzer speaker impedence
« Reply #2 on: May 15, 2014, 05:13:01 PM »
I've got to think I need to modify the headphone jack or at least the wiring to it, because when plugged in, it cuts out the speakers and switches to an 8 ohm resistor and also the headphone tip contact. The only place i'd do this is on the 206's that I modify since they don't have speakers inside. On those I can just do away with the headphone jack altogether since they're somewhat useless anyway (at least to me).

Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #3 on: May 16, 2014, 10:32:55 AM »
Headphone jacks are good  for late night playing. A stereo jack with the 2 + tips shorted will put audio into both sides of stereo headphones.

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 cinnanon

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Re: Wurlitzer speaker impedence
« Reply #4 on: May 16, 2014, 04:56:37 PM »
I think i'm just going to leave it mono headphones because if I put a stereo headphone jack in and someone plugs in mono headphones, the output will be shorted to ground, which I know some amps can handle and others can't (particularly older ones). Does anyone know if these amps can handle that? I always assume its bad.

Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #5 on: May 16, 2014, 07:26:55 PM »
How would it be shorted to ground?

« Last Edit: May 17, 2014, 08:51:36 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 cinnanon

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Re: Wurlitzer speaker impedence
« Reply #6 on: May 17, 2014, 01:22:52 AM »
Mono plug will short the signal on a stereo jack.

Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #7 on: May 17, 2014, 08:50:20 AM »
I see what you mean but I have never heard of this before.

Maybe it's because I do not own any mono headphones. I have almost always put a stereo jack in a wurli, but I guess I have never plugged any mono headphones into one.

Do they even make mono headphones anymore?


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 cinnanon

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Re: Wurlitzer speaker impedence
« Reply #8 on: May 17, 2014, 01:17:44 PM »
I don't know?  I would assume not. But if someone assumes that it's mono and it's not then FRY!

Offline David Aubke

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Re: Wurlitzer speaker impedence
« Reply #9 on: May 17, 2014, 02:01:34 PM »
I've often wondered why this isn't more of an issue - shorting hot to ground by using a mono plug. Seems like a design flaw in the 1/4" jack that it can happen so easily.
Dave Aubke
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Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #10 on: May 17, 2014, 05:36:36 PM »
Of course you could always put a stereo plug on the mono phones.........
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 cinnanon

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Re: Wurlitzer speaker impedence
« Reply #11 on: May 21, 2014, 04:57:20 PM »

Offline pianotuner steveo

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Re: Wurlitzer speaker impedence
« Reply #12 on: May 21, 2014, 06:55:26 PM »
They may be too big, and they also may be hi if speakers, not musical instrument speakers.
Wurli speakers are slightly smaller than a true 4x8 if I remember correctly....

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 martin

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Re: Wurlitzer speaker impedence
« Reply #13 on: June 07, 2014, 11:05:03 AM »
vintage vibe sell the propere 4x8 16ohm speakers http://www.vintagevibe.com/shop/wurlitzer-200-style-speakers/ i have a set in mine. they're great!
'77 stage rhodes mark 1>'73 traynor ygl3a mark III>'60's selmer pa100sv>Wurly200a>Nord Stage Compact>hh ma100>1x12 fane twin cone speaker>smartlight pa>2xhz speakers>selmer pa100>Samson Auro D210 active pa cab

Offline jankdc

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Re: Wurlitzer speaker impedence
« Reply #14 on: March 24, 2017, 10:07:56 AM »
I know that this is an ancient post. But for future reference, you can get a mono to stereo adaptor and not worry about shorting anything. The one that I have goes from 1/4" to 3.5mm.