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What is your power situation? Dedicated line? Conditioner?
Depending on your room size, distance from the speaker, and desired sound level, I wouldn’t think the Luxman would work in all but the smallest room.
This is especially true with the A3 as the smaller panels are less efficient.
Also, the panels go up in impedance with lower notes, meaning they can be up in the 30 ohm range. That would mean something like the Luxman would only be putting out 30 watts depending on the material.
For solid state you need like 300 + watts. More is better.
It’s not the speakers. Lowering the brilliance is just tone-controlling another problem.
The Soundlabs are just going to play what’s before them.
What are you using to stream, and in to what Dac?
Interesting development. I’m wondering if the amp wasn’t the culprit the whole time.
Tubes are wonderful, but in amplifiers they can go nuclear. I used to have Manleys and one time a tube went rogue.
Took out a resistor in the amp when it went. Had to have it repaired.
Hope things stay working well for you! Enjoy.
Nice! Good luck. Hope everything going well!
Any updates? Did the new fuses blow as well?
Did Dr. West just recommend you send it in for repair?
Seems odd the bias supply would just go bad to that extent where it’s blowing fuses.
Is the Conrad amp brand new? I would have it checked out.
I would get some new fuses to start, obviously.
Then disconnect the amplifier and replace the fuses. Turn on each speaker and see what happens.
If the left speaker blows again, its the plate.
You could then switch backplates to see if the issue follows the plate amp.
If you’ve had the amplifier hooked up during the two blown fuses, I would suspect the amplifier to be the problem.
I would email Dr. West. Sometimes it takes time for Sound Labs to answer, but they would know best.
They are very friendly and helpful.
When I ordered my speakers in September of 2018, I had this same conversation with Dr. West.
My listening room at the time was almost identical to yours; 11 x 18 x 8.
I was torn between the U545 or the M645.
Dr. West recommended the M645 given the size of the room. I would think sizing the panel is the most important, followed by the frame material.
Right now after moving, I’m in a smaller listening room and the 645s still work well.
There is a lot of talk about panel longevity.
What is best for the plate longevity?
How reliable is the bias circuit? Some of the older units had problems I’ve heard.
Is longevity increased by leaving them on constantly, or only when using them?
How detrimental is plugging them and unplugging them?
That is bizarre.
How old is the amp? Do you have a spare to try?
Preamplifier? I had a preamp do the same thing a year or so ago.
I would start from the speaker back. Try and get a spare amp to test. Maybe pick up a Crown from Amazon or Guitar Center to try. They are cheap, like 200-300. Might sound terrible, but will let you know the problem.
If it’s not the amp, work backwards.
Is the amp bias meter acting funny?
Do you have a tube preamp?? Could be bad tubes?
Can you turn up the bias, and do your hear the crackles? If not, likely the bias circuit went and needs to be replaced.
Switching backplates is dead on for a suggestion. If it follows the backplate, you know what went wrong.
I have a pair of M645s that are coming up on two years old, and this concerns me every time I use the speakers.
Frustrating that a speaker company that is four decades old and charges this much has this problem.
I’ve heard this happen to other people.
I can buy a pair of MLS from Best Buy that last 10 years.
Two years for a backplate is pretty poor.
Please let us know what you find out.