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Minimus 7 Loudspeakers - Measurements

It works on squares. You can do it with 9. Do 3 sets of 3 and you'll come out with the same impedance as a single. With 8 you'll have to do some odd combinations which will change the crossover point.

So three pairs in series wired in parallel?
 
Two in series = 16
Two of those in parallel = 8
Two of those in series = 16
Two of those in parellel = 8

That's 8 pair, or 16 speakers, each side, 16 pair total.

Hooking them in parallel first, then series, will yield the same result.
 
Two in series = 16
Two of those in parallel = 8
Two of those in series = 16
Two of those in parellel = 8

That's 8 pair, or 16 speakers, each side, 16 pair total.

Hooking them in parallel first, then series, will yield the same result.

Will this keep them all in the same phase as well?

I don't have 16 pair right now, at least I don't think so.
 
Okay I got one side of 9 wired up, There seems to be something funny going on. The bass is much better, but there is almost no treble or maybe way too much midrange? Perhaps it's all of the full range woofers running at the same time?
I assume the optimum thing to do is bypass all of the internal crossovers.
 
That's 8 pair, or 16 speakers, each side, 16 pair total.

I think he only has 8 pair total, Z.

How do you have nine wired?

3 in series will be 24ohms, and 3 of those "units" in parallel will get back to 8. That's how I'd do it.

SB, note that your tweeters are going to be pretty far apart, speaking in wavelengths that they're reproducing, so you're going to have monster comb filtering on the treble.

Ray
 
Here is an alternative for the 7W's binding posts. I had alot of fun with this mod. The binding posts are mounted to a solid piece of walnut witch in turn mounts to the cab using 2 of the 3 mounting holes for the original XO. Then on a seperate board i built the new PZ-2.1 XO. and used the remaining 3rd hole and the two holes from the stock wall mount bracket to mount the new xo.. You may notice that I used headless screws with washers and small nuts on the inside giving the back a nice clean look. My layout is different and I hope its right. They sound awesome. I have two more pairs to do like this.

minimus7wwithakmodxo012.jpg


minimus7wwithakmodxo027.jpg


minimus7wwithakmodxo013.jpg


minimus7wwithakmodxo024.jpg


mimus006.jpg


mimus005.jpg
 
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Here is an alternative for the 7W's binding posts. I had alot of fun with this mod. My layout is different and I hope its right. They sound awesome. I have two more pairs to do like this.
Looks mighty nice to me!

I'm certainly pleased to see so many AKers trying this mod and liking it, and I'm sure Pete feels the same.... :yes:
 
Hey Zilch, I'm starting to think maybe we shoulda snatched up all those Minimus 7 cabinets as housing for the raw monitor drivers I found recently...

or maybe the Barbie Sawzall would enable us to use the Minimus cabs as housings for waveguides...
 
Zilch, I haven't been keeping up with this post too much because all of my attention has been on the E-Wave. Did you ever come up with a viable replacement tweeter for this project. One of my originals does not work (you have the mounting plate) and I would really just rather replace both when I get into this project.
 
No. I demonstrated that the small (and inexpensive) Dayton would fit on the plastic bezel, but never actually mounted or measured it. If Wiredbecker and I score the parts, I may give that a try, as I have the tweeters.... :yes:
 
I found these for $27, an idea what model they are?


The appearance is a bit ratty - a few holes and tears and the finish is scratched, but the actual speakers seem to be in good shape.

They sound great hooked up to my B&O 1900 receiver, but what model are they? The badges don't show any clues.


bw1.jpg

bw2.jpg

bw3.jpg

bw4.jpg
 
I found these for $27, an idea what model they are?


The appearance is a bit ratty - a few holes and tears and the finish is scratched, but the actual speakers seem to be in good shape.

They sound great hooked up to my B&O 1900 receiver, but what model are they? The badges don't show any clues.

Uhhhhhhhhhh start your own thread???
 
Ok,getting ready to head to the beach for a week and dig out my minimus 7's
and T-amp.I have used this combo with an ipod last three years with pretty
good results.Somehow when I listened this morning,they were just not making
the cut.No time to order parts and mod them so of to Walmart I go.I guess
those e-waves have spoiled me.Anyway I look at the boomboxes,nah cant
go that route.So I pick out an RCA Theatre in a box.Receiver,cd,cdr,dvd
am/fm mini jack in front.Can speakers with a small sub $98.96 arrhhgg
hope nobody sees me buying this plastic crap since I'm the local music/
dj dude.Bring it home,hook it up,not bad.Unhook all the can speakers and
change it to stereo 2 channel mode,hook up the M7's along with the supplied
small sub and bingo....just what those little M7's always needed.The receiver
has about 4 power settings on the subs and can be dialed in just right to
match my stock M7's.While this system is not going to unseat my vintage
marantz and ewaves,by gosh this new beach system sounds great.I can take
cd's,ipod and dvd's to the beach and that receiver is really lightweight and
if it breaks,I'll take it back.
Not on the beach,but in the condo looking out at the ocean.
 
M7 Re-Measure

Since i now have a better measurement system (Fuzzmeasure), I decided to remeasure at 1 meter, on axis shown with 1/12 octave smoothing, half hanning, with a window good down to about 145 Hz.

No wonder these sound so good. XO is PZ 2.1.
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