Bang & Olufsen Red Line Authentic DIY ABR (Auxiliary Bass Radiators) Successful Repair

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Hi BeoMatt!

I'm from Sandvika, Norway. I have a pair of Redline 45. I'm having the same trouble as everyone else with the rottening foam in the bassport of the 45's. I have problem to open the case. I removed 10 screws at the rear of the cabinets, but I have problem with opening and will not damage frontplate. Please help me!

Wladek.

Hi Wladek,

I hope I can be of help, if my memory serves me correct it does require a little confidence to prise the rear section away, I think I removed the central part aswell with the screws that hold the rear stand on. Matt

abdank wrote:

I'm from Sandvika, Norway. I have a pair of Redline 45. I'm having the same trouble as everyone else with the rottening foam in the bassport of the 45's. I have problem to open the case. I removed 10 screws at the rear of the cabinets, but I have problem with opening and will not damage frontplate. Please help me!

Did you get the two screws under the strap holders as well as the one in the bottom of the connector bay?

If yes, it might just be tight (there's a foam gasket in there), or you're trying to pull at the wrong place. The "red line" will stay with the front plate, you have to pry between that and the rear part of the case.

Thank You for help!

Everything is OK now!

Wladek.

I have come up with a great ABR repair/modification and many folks in several countries have used my advice and love their finished speakers.  Many are original owners and didn't want to loose them after enjoying them for so many years. 

I use twin 5.25 passive radiators with an Fs of 23 hz in place of the ABR plates.  The bass is outstanding.  I don't have any testing software but my ears have worked well for me for years.  I do have a track history of building some fine speakers.  My B & O Redline modification can be found at:

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