HTHMAN
Super Member
I have long owned several pair of the Minimus 7 family of speakers. I currently have 2 pair of the original 7's that were made in Japan that I bought new when they first came out, one pair of Optimus Pro 7AV's, and 2 pair of Optimus Pro 7X speakers. I never owned a pair of the Minimus 77's. Recently. I acquired a pair of Audiosource LS-Two/A speakers at a great price--FREE. They appear to be exactly like the 77's with no port. They were in good shape except for the rotted foam around the woofers. I intended to either replace the speakers or repair the foam. Neither seemed to be a good option. It is hard to find a speaker that will fit and all the foams I found were $20 a pair. I found a link on this forum for some cheap surrounds and ordered them. EBay item # 360313218816
I documented my work and thought others might find it helpful.
Here is the speaker with the damaged surround. As you can see, it is identical to the Realistic speaker.
First, remove the damaged speakers
Remove the old surround by scraping it off the back of the speaker cone. I mostly used my fingers. There is a gasket that covers the outside edge of the surround. remove it carefully to avoid damaging it Here is speaker with surround removed.
Surrounds: Note, the rolled bulge goes in, not out like the originals.
The surrounds fit perfectly on top of the cone and could probably be installed to the inside, but the originals were on the outside. Also, as you can see, if you install on the inside, the surround rides a little above the speaker frame.
To install outside the cone, spread a little glue on the top of the tapered edge. I recommend Aleene's Tacky glue.
Spread the glue to the edge ridge of the surround. This will aid you in centering the surround
Work the surround under the cone by stretching very slightly. Center the cone in the white ring. Press and pinch around the cone to attach the surround to the cone. Make sure it is centered and let dry until glue turns clear.
Once dry, glue the edge of the surround to the frame by lifting the edge and supplying glue to the frame. Make sure the speaker stays centered. Check that the speaker does not rub by pushing the cone in and out a few times. The suspension is stiff and should not need to be shimmed.
Next, glue the gasket back in place on top of the surround.
Press the gasket down around the edge. Turn speakers over and place on waxed paper. Let dry for a couple hours or more.
Here we have the finished product.
I tried these out and they sound great. I did an A/B comparison to my Minimus 7's. The larger pair do have a little more bass and a little fuller sound. The highs sound pretty much the same. The 7's sound a little crisper, but that may be due to there being a little less low end or a different crossover. Anyhow for $4.50 for the surrounds and $1.50 for a bottle of glue, you cant beat the sound of a $6.00 speaker.
I documented my work and thought others might find it helpful.
Here is the speaker with the damaged surround. As you can see, it is identical to the Realistic speaker.
First, remove the damaged speakers
Remove the old surround by scraping it off the back of the speaker cone. I mostly used my fingers. There is a gasket that covers the outside edge of the surround. remove it carefully to avoid damaging it Here is speaker with surround removed.
Surrounds: Note, the rolled bulge goes in, not out like the originals.
The surrounds fit perfectly on top of the cone and could probably be installed to the inside, but the originals were on the outside. Also, as you can see, if you install on the inside, the surround rides a little above the speaker frame.
To install outside the cone, spread a little glue on the top of the tapered edge. I recommend Aleene's Tacky glue.
Spread the glue to the edge ridge of the surround. This will aid you in centering the surround
Work the surround under the cone by stretching very slightly. Center the cone in the white ring. Press and pinch around the cone to attach the surround to the cone. Make sure it is centered and let dry until glue turns clear.
Once dry, glue the edge of the surround to the frame by lifting the edge and supplying glue to the frame. Make sure the speaker stays centered. Check that the speaker does not rub by pushing the cone in and out a few times. The suspension is stiff and should not need to be shimmed.
Next, glue the gasket back in place on top of the surround.
Press the gasket down around the edge. Turn speakers over and place on waxed paper. Let dry for a couple hours or more.
Here we have the finished product.
I tried these out and they sound great. I did an A/B comparison to my Minimus 7's. The larger pair do have a little more bass and a little fuller sound. The highs sound pretty much the same. The 7's sound a little crisper, but that may be due to there being a little less low end or a different crossover. Anyhow for $4.50 for the surrounds and $1.50 for a bottle of glue, you cant beat the sound of a $6.00 speaker.
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(too harsh and bright).