Leslie wrote:

Oh man, my hands are itching when I see this. It looks like the RL60's has this ABR and the RL60.2 not? I did these a while ago and posted a thread on the old forum.

I spent a bit of time yesterday looking through the old forum.  Many pictures gone, lots of broken links.  This picture is great, showing the ABR metal plate.  I work at a metal fabrication shop - why can't I reproduce a facsimile of the ABR?

Søren Mexico wrote:

Rich wrote:

So - do I tell Duane, "Thanks, but no thanks."  Or do I have a go a refurbishing these?

Winter is coming, so why not refurbish them, with the help from Leslie nothing can go wrong, and you will need them for the 5500 pizza boxes.

Oh, I think I've talked myself into keeping them, if for no other reason than "to save them from the skip."

hemenex wrote:

Beside Rich's obvious kick in my a$ 😎

This is an insight of some RL60's I've got.

Login to view image

There must have been a retrofit kit to replace the ABR with those tube plates. I think Leslie even had the number...

  Gunther

EDIT 1: The 2 RL60 plastic stripes are missing

EDIT2: Still not a fan of those grills 😕

Great picture!  I can probably figure out everything about the retrofit bass reflex solution from this photo.

And yes, there are only three fans of the M70 grills:  me, my wife, and possibly Soren Mexico.

But all this ribbing and counter-ribbing is in good fun, right?  😐

Dillen wrote:

I can find a pair of ABR plates in the dungeons if you need but I suppose postage would be a bit steep.

Martin

Those engine parts I sent to you were about $50 going from here to there.  Surely it wouldn't cost nearly that much to go from there to here?  Weren't those engine parts about 10kg or more?

tournedos wrote:

hemenex wrote:

There must have been a retrofit kit to replace the ABR with those tube plates. I think Leslie even had the number...

Yes there was. I believe that from all the cures to the broken ABRs, that would be easiest and cheapest to remanufacture. I guess all you would need is the location of the reflex hole and the lenght & cross-sectional area of the tube, and it would be close enough to sound reasonable?

Easy and cheap aren't necessarily required.  What I don't want to do is spend the time, energy, and money to fix a product that isn't worth fixing.  So far, I haven't come across anything to lead me to believe the RL60 was a poor product.  On the contrary - most folks that fixed them and reported back on their sound were quite pleased.

So the question becomes, which fix?  It seems the options include:

1) Find a B&O produced retrofit kit somewhere (bass reflex conversion)

2) Produce a facsimile of the retrofit kit (bass reflex conversion)

3) Get a repaired set of ABRs from Martin if he indeed finds some in his dungeon

4) Source a set of ABRs here in the states

5) Produce a facsimile of the ABRs using materials and equipment where I work

6) Try Mike Cason's retrofit of two 5.25" passive radiators per cabinet (the PRs are still available at Madisound for about $10 each)

I'm not as big on "keeping things original" as some others are, so I'm game to experiment.  Perhaps in the end I'll try multiple fixes.

Rich wrote:

Those engine parts I sent to you were about $50 going from here to there.  Surely it wouldn't cost nearly that much to go from there to here?  Weren't those engine parts about 10kg or more?

Postages can be a strange thing. When I bought my RL60.2s from Germany, the seller apparently paid around 20 euros, and the speakers were delivered to my door (the norm over here is that you have to pick up incoming parcels from somewhere). If I wanted to send the same kind of package out, I would pay about that much for similar service inside Finland, and about three times as much back to Germany!

Regarding the real problem at hand... sounds like you have already talked yourself into repairing the speakers 😁

They should be worth it. Recap the crossover while you're at it - it made a huge difference with my RL60.2s, I wouldn't have believed it.

True but the danish postal rates are ridiculous.

Martin

4 years too late but the Mike Cason twin passive rad solution kicks butt.. I did it on my rl60 and replaced caps with solens polycaps and the performance is way better than all the rl60.2 I have ever had pass through my shed.

I'm no speaker designer unlike Mike but I know he was not a fan of the tuned hassling as it did not maintain air pressure in the cabinet and made the other drivers work harder as a  result .

All I know is the twin tippany rads I imported from the states sound bloody good compared to the bass port.

I still have 4 rads left but I don't want to waste them on the rl45's I currently have in the shed:)

Auto correct strikes again :) 

tuned bass port not "hassling"

i imported the rads from Madisound, got stung for import duty :(