For those with early solid state games from Williams, Gottlieb, and Bally which use a 6 inch full range speaker, they have been hard to find at times. I've found an excellent replacement at Newark (formerly MCM Electronics).

http://www.newark.com/mcm-audio-select/55-5690/6-5-full-range-dual-cone-speaker/dp/95Y2940?ost=55-5690&scope=partnumberlookahead&exaMfpn=true&searchref=searchlookahead&ddkey=http%3Aen-US%2FElement14_US%2Fw%2Fsearch

It's 6.5 inches but the mounting holes all line up with 6 inch original speakers. This is full range, 8 ohms @ 50 watts. I just put one in an Eight Ball Deluxe and it fit & worked perfectly. So crisp and clear is the sound now. We just bought a dozen of them because the price was so good. Each speaker was individually boxed too. We paid about $6 per speaker.

Newark # 95Y2940 or MCM # 55-5690.

No, I haven't really looked for modern Stern machine speaker replacements. Most people were simply buying Pinball Pro or Flipper Fidelity upgrade speaker kits.

The specs I've seen for Stern "pro" speakers are these:

Cabinet floor speaker: 8 inch, round, woofer, 4 ohms, 25 watts

Backbox speakers (both are the same): 4 inch, square, midrange, shielded magnet, 8 ohms, 10 watts

My buddy Welby Bergum and I have been doing so many older Williams, Gottlieb, and Bally solid states lately. I'm seeing more and more coming in with bad speakers (rotted, corroded, blown, or dead). Had an Addams Family come in 3 weeks ago which had virtually nothing left of the paper cone in the cabinet floor speaker. Those MCM/Newark 6 inch speakers are a godsend and at such a reasonable price too.

If you're talking about an 8 inch woofer for the cabinet bottom in a Stern Pro, check out these two speakers:

http://www.newark.com/mcm-audio-select/55-3231/70w-rms-4-ohm-rubber-surround/dp/43W7872

http://www.newark.com/mcm-audio-select/55-3210/100w-rms-4-ohm-paper-cone-woofer/dp/43W7867?st=8%20inch%20speaker

And check out those prices, very reasonable.

One is rated at 70 watts and the other at 100 watts. They aren't gonna blow!

Those were from just taking a quick look on Newark's website. I have not actually tried those 8 inch ones.

I forgot about Data East. Never paid much attention to the speakers they had. Guess I'll have to check out the next one that comes in for repair or restoration here.

Game Plan might use the same speaker too.

You ought to receive them quick. Newark is in South Carolina and ships speakers via UPS. We got ours in a week since we are in Washington state.

Yes, it should.

Just to add to this thread, if anyone with a Bally classic with the volume control mounted on the coin door, here is the correct volume control for you:

https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10001&freeText=140514&langId=-1&storeId=10001&productId=140514&krypto=jnhODawy5%2Frl%2Ff63cm3HsfgdnTUpjE2armGD8g1oT3G12sxv0QS5GjyMxoLNTTys5cAP765sw6fT8ZXqORrVytXVGtZyQSJ%2Fg7DxMjY3kDc%3D&ddkey=https%3AStoreCatalogDrillDownView

Jameco Electronics # 140514 just $3.95 each. Time to replace those old "scratchy" or fluctuating ones.

This also works on classic Stern solid states.

I just put one into a Stern Orbiter 1 machine. It's a bit tricky getting it to fit because of the unusual mounting place in the neck of the machine. I'll try to get pictures later today. It does fit perfectly on the speaker mounting board, but you need to use 3 inch long screws to mount the whole works back in the machine.

Orbiter 1 new speaker installed (resized).JPG

Orbiter 1 old new speakers (resized).JPG

Orbiter new speak (resized).JPG

The Eight Ball Deluxe and the Stern Orbiter 1 I just put these speakers in sure sound alot better and crisper! Great for games with speech.

They sure sound better than the wimpy original speakers.

I think for the dozen we bought was about $25 on UPS. US Mail would have been about $45.

How did it sound in a WPC cabinet?

Did you receive them yet?

Just checked their stock. As of today, there is only 16 left. Next shipment is due on June 17, 2019. I'd say if you guys need any now, you'd best get them ordered now or else wait until June 17th.

Now "Out of Stock" until the middle of June.

There's this one, but it only shows 3 in stock:

https://www.newark.com/visaton/55-5155/speaker-6-5-full-range-driver/dp/55X0597?st=6.5%20inch%20full%20range%20speaker

Looks good, but a bit pricey.

In general, the lower the impedance, the more power drawn from the amplifier.

Never had a Viking. I don't know what it came with or how it's mounted. I will have to hazard a guess and say it was simply screwed to the cabinet bottom. In that case you'd simply spot new holes with a 3/32" drill bit for some #6 by 3/4" long screws.

I found a picture of the bottom cabinet of a Bally Kiss. Looks like it had a 5" speaker just screwed down on a wood square. Looks big enough to hold a 6.5" and the amplifier should driver it perfectly fine and sound good.

You'll probably have to cut a new piece of wood to mount the new speaker.

Go back to post #62 here:

https://pinside.com/pinball/forum/topic/new-6-inch-speakers-found/page/2#post-5815679