[brooklyn]

I’ve had different pairs of Maggies over a forty year span.. The last pair I owned was the .7’s.. I don’t ever remember bumps on any of the panels during those years. I don’t think I would be happy about that..

I didn’t see it mentioned, sorry if I missed it. What amplifier are you using? The Maggies love power.. 

I used one REL T/5i sub which sounded good in the room with the .7’s but the bass sounded a little uneven within the room unless you were sitting near the sweet spot.. a second T/5 took care of that problem..

[I.Greyhound Fan]

The bumps are present on many new maggies.  My 1.6's came with them.  Magnepan gave me a new pair but they told me that they usually put those panels on maggies that have the beige covering because you can't see them.  They do not affect the sound apparently.

[I.Greyhound Fan]

May I ask what you like better about the ML subs?
I don't care about 'thump' per se.  I want to hear pitch and timbral accuracy of (let's say) a string bass in an orchestra or jazz combo.
I've read elsewhere that some people recommend two subs.  I was hoping to avoid this due to lack of floor space and to keep the budget down.  But I will keep an open mind.

I am not saying my ML subs are better than the Rythmiks.  But they integrate just as well with my Maggies.  They are fast, musical and can pressurize a room a little.  They have a very small foot print which I prefer as the maggies are huge.

[josh358]

Magnepan calls it "tenting," but it's actually the definition of delamination. The bumps are where the foil has separated from the mylar.

The rattling sound on bass notes is cause by the same thing (the wire or foil separating from the mylar).

Tenting may technically be a form of delamination, but it's a harmless cosmetic issue that doesn't affect the sound, whereas delamination will typically progress until the speaker buzzes and needs repair. The LRS+ is particularly prone to it because of its special foil attachment technique.