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Old 24th August 2007, 03:17 PM   #1
rellik is offline rellik  United States
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Default Infinity reference 5 mid replacement

This inquiry is about the infinity reference five floorstanding speakers

After recently successfully refoaming my woofers, i went on to refoam my mids as well and ended up destroying both in the process...

Now i need to find a sutable mid replacement for my speakers. They dont have to be great, just something decent for school. the original mid was a 5" with an injection molded graphite cone.

Any options anyone? or should i scrap this project all together?

Ill put up pics of the mid soon.

thanks in advance
Hersh
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Old 24th August 2007, 05:59 PM   #2
rellik is offline rellik  United States
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hooked it up to a multimeter and resistance measured 4.4 ohms.
the pictures:

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Old 25th August 2007, 01:22 AM   #3
badman is offline badman  United States
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I don't see how it's destroyed? Looks like it just needs the new surround.
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Old 25th August 2007, 01:44 AM   #4
rellik is offline rellik  United States
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while trying to separate the dust cap, i accidentally cut through the cone on the outside of the dust cap rather than on the inside
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Old 25th August 2007, 05:37 AM   #5
PB2 is offline PB2  United States
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Quote:
Originally posted by rellik
while trying to separate the dust cap, i accidentally cut through the cone on the outside of the dust cap rather than on the inside
Did you cut through the voice coil wires?

If not, I'd try to do the refoam without removing the dust cap, many prefer to do it this way. I do and have never had a problem. Not sure on such a small driver but I expect that it would work.

Then if you finish the refoam with sucess, I suggest that you glue the cut if it is not too large, say less than half way around.
This repaired driver would likely work better than a substitute.
You could then take your time on ebay and look for a correct replacement.

Does Infinity sell these in their automotive line?

Pete B.
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Old 25th August 2007, 05:39 AM   #6
rellik is offline rellik  United States
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one cone suffered far worse and had half of the cone detach as my knife slipped.

Once again i learn not to work when tired...

infinity no longer makes a replacement and old stock ones rarely show up. I saw one from ebay google cache about 6-7 mos back.

I got a pair of these from parts express and will see how they work. Its goofy but they are to make sound till I get time for a nicer project. It should fit the enclosure size wise from the measurements given. Infinity quotes a crossover freq of 300 hz from the woofer to the mid and 4k hz from the mid to the tweeter.

the replacement: http://www.partsexpress.com/pe/showd...number=295-370

If this idea sounds terrible I will send em back when they arrive.

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Old 25th August 2007, 06:03 AM   #7
PB2 is offline PB2  United States
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I'd guess that the Infinity 5" does not have a resonant peak at the top of it's pass band similar to the Dayton driver.
Have you traced out the crossover schematic?

You might want to take a look at a Vifa or Peerless 4 ohm here:
http://www.madisound.com/catalog/specials.php

There are also the closeout drivers from NHT here on this site.

The Vifas at Madisound are likely better than the Infinity drivers.
Might give you incentive to learn how to mod the crossover to match them.

Pete B.
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Old 25th August 2007, 05:18 PM   #8
rellik is offline rellik  United States
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I have tried to trace out the crossover schematic but the inductors dont have values with them and I dont have an LCR to measure them.

where did you find the freq response graph for that dayton?

As for the other speakers on madisound i searched before buying those daytons, none in my price range will fit my enclosure without modifications... all the 5" are closer to 5.5" and all the 4-4.5" ones are just too small.
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Old 25th August 2007, 06:03 PM   #9
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The Daytons have severe breakup modes in the 7-10k region, and need specific notch filters to deal with them. Crossing at 4k, they are going to sound pretty harsh. Look for paper cone drivers of similar size...something like the Vifa M11WH09-08 4.5" Coated paper cone midrange... link

If it's too small, you could make an adaptor ring of some kind out of masonite.
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Old 25th August 2007, 06:13 PM   #10
rellik is offline rellik  United States
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^that one looks like i could make it fit except its an 8ohm, how does this vifa look?

http://www.madisound.com/catalog/pro...oducts_id=1153

and thanks again everyone for the help
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