What do you mean when you write ".... or a problem in the built in amp ....."?
There is no built-in amp on the Sequel II speakers, (i.e. these are not active speakers). Do you mean the crossover?
(The fact that you plug in the speakers does not mean there is an amp, but that is merely the way electrostatic speakers work, as they need a bit of power to energize the electrostatic cells.)
And your problem is very likely a blown panel, which means at least a few hundred dollars for a replacement panel, (assuming you can install it yourself), or several hundred dollars if you want M-L to fix it. If you like the sound of the speakers, and if you're okay with listening at loud, but not very loud sound levels (see below), then perhaps you might be able to only fix the one broken panel. (Although, if one panel is new, and the other is old, there may be a difference in the sonic presentation between the two speakers.) If it were me, I'd either be prepared to replace both panels, or walk away from the deal. $250 is really cheap for these speakers, and my guess is that is the reason that they went so cheap, becasue the seller knows they are damaged, and they don't want to bother fixing them.
As far as what YOU should do, that is pretty much up to you. The Sequel IIs are decent speakers, with a nice treble and mid-range, and with good imaging and soundstaging, (albeit the sweet spot is pretty small, due to the panel design). The bass is slightly weak, but not bad considering the cost of the speaker overall.
(However, if you intend on using these for very loud music, such as rock or complex symphonic music, be aware that the sound can be somewhat brittle when played at realistic sound levels. i.e. the music starts sounding like it is breaking up a bit when played really loud.)
My two cents worth.
(FYI, I lived with a pair of these for over a decade.)
There is no built-in amp on the Sequel II speakers, (i.e. these are not active speakers). Do you mean the crossover?
(The fact that you plug in the speakers does not mean there is an amp, but that is merely the way electrostatic speakers work, as they need a bit of power to energize the electrostatic cells.)
And your problem is very likely a blown panel, which means at least a few hundred dollars for a replacement panel, (assuming you can install it yourself), or several hundred dollars if you want M-L to fix it. If you like the sound of the speakers, and if you're okay with listening at loud, but not very loud sound levels (see below), then perhaps you might be able to only fix the one broken panel. (Although, if one panel is new, and the other is old, there may be a difference in the sonic presentation between the two speakers.) If it were me, I'd either be prepared to replace both panels, or walk away from the deal. $250 is really cheap for these speakers, and my guess is that is the reason that they went so cheap, becasue the seller knows they are damaged, and they don't want to bother fixing them.
As far as what YOU should do, that is pretty much up to you. The Sequel IIs are decent speakers, with a nice treble and mid-range, and with good imaging and soundstaging, (albeit the sweet spot is pretty small, due to the panel design). The bass is slightly weak, but not bad considering the cost of the speaker overall.
(However, if you intend on using these for very loud music, such as rock or complex symphonic music, be aware that the sound can be somewhat brittle when played at realistic sound levels. i.e. the music starts sounding like it is breaking up a bit when played really loud.)
My two cents worth.
(FYI, I lived with a pair of these for over a decade.)