What about Minimus 77's?? I just saw a pair today. They were white and had a small rear port. They looked just like the Minimus 7's I had back in the 80's but the 7's had no port.
Realistic Minimus 7 ID Thread
- Thread starter Grainger49
- Start date
Kreichenbach, yes, 77s have a port, but this isn't a 77 thread.
KFA888, Looks interesting. The 77 seems to be taller, wider and deeper. And the 77 uses a foam surround on the woofer which looks to have the same magnet structure as the 7. It appears that the 77 magnet might even be shallower, front to back, than the 7. You can tell us if that is correct.
The tweeters seem to be the same and have a "swirl" around the dome. Is this a later unit? Can you post the C/N and S/N of one of your 7s?
KFA888, Looks interesting. The 77 seems to be taller, wider and deeper. And the 77 uses a foam surround on the woofer which looks to have the same magnet structure as the 7. It appears that the 77 magnet might even be shallower, front to back, than the 7. You can tell us if that is correct.
The tweeters seem to be the same and have a "swirl" around the dome. Is this a later unit? Can you post the C/N and S/N of one of your 7s?
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Sorry, I didn't mean to derail the thread. I thought that the 77 was maybe a 7 with a port. I can now see that it is larger. My bad. Carry on.
Look a few posts back and there is a great link to a site with Radio Shack catalogs. The 77 is a later model.
We are not derailed,....... yet. Thanks!
We are not derailed,....... yet. Thanks!
kfa888
Addicted Member
Woofer on the 77 is larger, foam surround, and different magnet, shorter and wider. Tweeters are the same. i do not have ether of these now so can't check serial number. BTW was not overly impressed with the 77 and did not seem to have a lot more bass than the 7 but some.
picked these minty little 7's up at a garage sale for $3, didn't need them but was not going to leave them for $3.
Interesting the ring around the tweeters and white woofers, hmmmmmm....
I had thought that the {Edit, I see now that they are a gray not white} woofers were early and the rings were later.
I had thought that the {Edit, I see now that they are a gray not white} woofers were early and the rings were later.
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kfa888
Addicted Member
Can I tell what year they are without yanking a woofer? (Yanking a woofer sounds fun... or bad, out of context
)Cat no - 40-2034A
QC no. 3213 / 9A8
:scratch2:
As best as I can tell you can only look at the driver numbers by removing the four screws and probably removing the slip on solder lugs on the woofer. The yellow lead goes to the positive of the woofer.
The serial number is on the same tag as the QC number. I think 3213 is the serial number.
The serial number is on the same tag as the QC number. I think 3213 is the serial number.
kfa888
Addicted Member
Looks like yet another version of the woofer, note different magnet. Looks like one form a BA speaker. Also this one is stuffed with glass the others were more a heavy wool like stuff. Coke and cap. I'm always surprised to find a choke on such a small woofer.
tweet
Darn things look new.
tweet
Darn things look new.
soundmotor
super modified
I bought my first set of M7's in '85 and they went into my car. By '86 they had white cones but they did not start out that way. They were dark when I got them.
soundmotor
super modified
That is a Jyoto magnet yoke. ADS used them as well & Jyoto was most certainly a Japanese supplier. However the woofer would not have been assembled by them. Jyoto supplied metal parts not final assemblies.
mikeybc
Listener
Those woofers are not white though, just faded . Minimus 7 woofers seem to fade easily because light is always getting through the grill to the untreated paper cones.
I guess that the "white" woofers I have are the result of them being in the sun in the back of my 1980 Turbo Mustang.
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soundmotor
super modified
Now that is funny! Mine were in my '85 LX 5.0 (but my first car was a '79 turbo Mustang complete w/ TRX suspension.) Heh! In the backseat of the '85, the armrest area was molded plastic. I slitted the plastic with a Dremel just enough to get the metal backer plate for the bracket through and then bolted the brackets up. They worked great mounted like that but got a straight shot from the sun. Ran them off a Proton 222 and later an ADS P100. They survived the abuse.
That's the car! 1980, hatchback, 4 speed, Turbo, TRX, painted refrigerator door white with a chamois Recaro interior. I used a Pacific Stereo amp, bought from my buddy Randy.
Michael Powers
Super Member
Well, were getting into Click and Clack terrritory here (if this seems like a cryptic statement, google "Car Talk"), so I'm going to bring the discussion back to speakers. Today I found a pair of Minimus 7 look-a-likes. OHM Model M. Dimensionally identical to Minimus 7's, same metal cabinet but had a port in the back, made in Japan, had an impedence of 4 ohms, and the grills looked like the Radio Shack grills would look if they were covered in a thin black cloth. Underneath the grills were plastic instead of metal. Anyone remember these? And which came first, the Minimus 7's or one of the look-a-likes?
Edit: Here is the link to the Ohm Model M:
http://www.ohmspeakers.com/store_item_detail.cfm?item_ID=27&cart_ID=6191036491220
So it seems that these were intended to be sold with a subwoofer, whereas the Realistic units were sold as standalone speakers. I'm still wondering if different companies used the same Japanese subcontractor to make them all .....
Edit: Here is the link to the Ohm Model M:
http://www.ohmspeakers.com/store_item_detail.cfm?item_ID=27&cart_ID=6191036491220
So it seems that these were intended to be sold with a subwoofer, whereas the Realistic units were sold as standalone speakers. I'm still wondering if different companies used the same Japanese subcontractor to make them all .....
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Michael,
I know the car brothers too.
Yes we skidded sideways a bit there but it is the Minimus 7 ID thread. I was an audio retailer back in the late 60s to the late 70s. I remember the Braun speakers that the Minimus 7s copied. I don't think the Minimus were the first such speaker but I was looking to see what other permutations there are out there of the Minimus 7.
I know the car brothers too.
Yes we skidded sideways a bit there but it is the Minimus 7 ID thread. I was an audio retailer back in the late 60s to the late 70s. I remember the Braun speakers that the Minimus 7s copied. I don't think the Minimus were the first such speaker but I was looking to see what other permutations there are out there of the Minimus 7.
Perusing eBay today, I spotted a listing for a lot of several pairs of M7's which includes a pair with AudioSource badges. Cabinets seem identical in every detail to the Minimus but the seller claims they have poly cone mid/bass drivers with otherwise identical tweeters and crossovers.
(I have no interest whatsoever in the auction other than as a reference related to the thread topic.)
Actually, the choke is part of the tweeter filter. Woofer runs free.
Those are some VERY NICE silvers!
Noticed slight differences from mine so pulled 'em down for closer inspection. They're labeled "40-2034" without any letter suffix. QC labels show 2837/6A6 & 2838/6A6 (Consecutive numbers!-- weren't they sold individually? What are the odds ...?)
These cabs are stuffed with yellow Fiberglas. Others have white fiberfill.
Crossover surprised me with round inductor and large, 3-point mounted, plastic terminal board. The others all have the square choke and small terminal strip mounted with 2 screws, while the 3rd screw boss is left untapped. I drill and tap these myself to mount AK's PZ-2.1 crossover mod -- I see now that Radio Shack used to do the same.
Woofers are the familiar 1218 units. Also the most "faded" among my herd -- kind of grayish-tan.
These have metal flat-faced SD-50 tweeters.
My other M7's all have plastic ripple-ring faces, suggesting these are my earliest pair.
Check out member mbsmbs2001's thread with detailed pics of his first version Minimus 7's. Some points of interest are the round cup and screw terminals, tweeter model SD-13(!) and extra info printed on the driver magnets.
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