Author Topic: 1972 Rhodes KMC HOME piano prototype?  (Read 175 times)

Offline spave

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1972 Rhodes KMC HOME piano prototype?
« on: October 03, 2021, 08:18:11 PM »
Hi everyone,

First time posting on here but long time reader. This forum has been incredibly informative for learning about Rhodes and I'd like to thank everyone who has shared their knowledge here over the years.


I recently picked up what I believe is a prototype home piano from the early 1970s and I wanted to know if anyone here has seen a similar piano to this one before?

The first image is from the Rhodes Super Site and has been referenced by a few users over the years as a piano that is fairly common, but I believe all of them have been confusing it with the KMC Student model that has the metronome amp on the bottom left of the keyboard. The piano in the ad has the Peterson preamp in the name rail and has two pedals which I have never seen before. Has anyone seen a piano that is IDENTICAL to the piano in the ad and isn't a student model with the metronome and isn't the 1977 Walnut case home model?

The next photos are of the keyboard I recently got. I can confirm it is a Peterson preamp and not the student amp in a different location.

Will post more pictures and videos soon, don't want to make the first post too long.
1972 Home Rhodes Prototype
1971 Suitcase Fender Rhodes
1977 Wurlitzer 270

Offline spave

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Re: 1972 Rhodes KMC HOME piano prototype?
« Reply #1 on: October 08, 2021, 08:48:34 PM »
Ok, so no replies yet which I hope means no one has seen a Rhodes like this (and not that no one is on here anymore :'()


Here are some pictures of the electronics on this "prototype" Rhodes

Pic 1: The money shot. This KMC home piano has FOUR player facing 10's! They are all touching so they form a wall of sound that blows both the standard KMC and the suitcase pianos out of the water. It appears that the electronics are straight from the Peterson Suitcase but the speakers appear to be Oxford 10's from Fender's amp division.

Pic 2: You can see how the Peterson power supply has been mounted rotated on its side in order to fit in the KMC cabinet. Form member Voltergeist did a similar KMC/Suitcase hybrid build a few years ago https://ep-forum.com/smf/index.php?topic=8069.msg42274#msg42274 but he mounted the power supply the same way it is mounted in the Suitcase model. It is interesting to see how it was done when Rhodes was considering the same idea back in the day.

Pic 3: Close up of the left speakers. You can see how tight the speakers are in order to get them all in the front panel. Another interesting note is the cutout you can see between the speakers on both the left and right sides. My guess is this piano was originally going to be fitted with two 12s like the Executone's but it was most likely changed when this piano got the Peterson electronics instead of the Executone tube amp.

This is a link to one of the Executone threads. https://ep-forum.com/smf/index.php?topic=7705.0 You can see in one of the pictures how the two 12s go right where the cutouts are on this Rhodes. Interestingly though, that Rhodes had its frame and baffling altered from a standard KMC whereas this one actually had the speaker cutouts crudely routed out. The timing lines up for this too. That piano has a TBJ date of 10 72 and mine has a date of 9 72 so this might have been the first prototype of what became the Executone series.

[img]http://i232.photobucket.com/albums/ee252/Bad_Jazz/Rhodes/HolyShit_zps90f31c06.jpg/img]

Still trying to line up a specific manufacture date though, (No lower finish stamp on the harp) so if anyone is good at decoding pots, electronics, or Oxford speakers, please speak up.

Hope you all are enjoying these posts.
1972 Home Rhodes Prototype
1971 Suitcase Fender Rhodes
1977 Wurlitzer 270

Offline spave

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Re: 1972 Rhodes KMC HOME piano prototype?
« Reply #2 on: October 16, 2021, 10:42:33 PM »
Ok, the saga continues...


1st Picture is a resized image of the front that is easier to see on the forum.

2nd is a close up of the custom faceplate. If you look carefully on the far left, the black pinstripe is actually hand painted in the spot where the plate was cut before the 4 pin connector. As far as I know this is the only Rhodes that has a Peterson plate that has no external connections. It looks very similar to the Vintage Vibe Piano's faceplate but that one is wider and has a pilot light where the 4 pin would normally go.

3rd picture is of the cheek block. The power switch appears to be different from the standard suitcase switch with its inclusion of the metal on and off tab, although its new location is much more intuitive and easy to reach. Same with the pilot light which appears to be identical to the ones used in the suitcase. Haven't really used the headphone jack yet, although its inclusion in the cheek block makes it both more convenient and easier to find headphones with a long enough cable for. It is easy to see why that is the place the new Rhodes will have it as well.

One other thing to note in this picture is that none of the holes actually line up. It appears that somebody just eyeballed each one on the drill press. You gotta love that CBS craftsmanship ;)


Last picture is to show the wiring going from the keyboard down to the "suitcase" bottom. One of the larger grey cables is the 4 pin cable from the preamp and the rest are the stereo headphone jack, pilot light, and power switch. The hole that all the wires pass through appears to be wide enough to get the RCA and a return out of, so it would be possible to make a discrete effects loop to replace the missing one on the faceplate.
1972 Home Rhodes Prototype
1971 Suitcase Fender Rhodes
1977 Wurlitzer 270

Offline sookwinder

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Re: 1972 Rhodes KMC HOME piano prototype?
« Reply #3 on: October 17, 2021, 01:01:31 AM »
FWIW, Oxford 10" are awesome speakers (the Oxford 12" are shite)
The 10" Oxfords are THE speaker for the Fender Princeton Reverb amp which everyone hangs out for if you are a guitarist.
Late 60s Pianet N - Late 70s Pianet T - Ensoniq ESQ1 - Hammond XK2 - Wurli 206A converted to a 200A - 1973 Rhodes Stage 73 - Roland RD150 - Vintage Vibe 64 EP - s**t load of guitars, basses & amps