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No, not normal. Got a replacement PS from ML, Faaaaast!! They're great! Installed it and right away got the expected voltage of 23.5V! So, all is well now.

I did this same test with the same resistor a couple weeks ago. My power supply was outputting fluctuating millivolts. The speaker involved is the C18 Focus, only 1-1/2 years old. So I guess they can go any time. Since being a ML customer for about 13 years and having purchased 22 or so...

I too got great ML Support! It was Ron who helped me. He responded extremely promptly right at business open to a support ticket I submitted the previous evening!! After some emails and sending photos, he shipped out a new power supply board that day, Monday before Thanksgiving, for my Focus...

I can't give an opinion with regards to these amps with 15A speakers. But, in the specs for both amps, other than the power difference the only spec I see that might have an impact on the sound is the Dynamic Headroom, which is higher on the MC611. I'm not one who lends a lot of credence to...

Well, the C100 is pretty similar at first glance. But it does have a wave guide for the tweeter which sets the tweeter back a little, which is probably an improvement. But other than these differences, it seems like only a small step forward. But you never know for certain unless you try it...

Thanks JonFo! Your answers seem logical and along the lines of how I was thinking it worked. Thanks for your higher level of education in guessing! There's so much DSP in our systems these days that I got to thinking about how many conversions there might be between source and driver.

The question popped into my head as to if the DSP is active always or only with certain settings active in ML subs and speakers. With regards to the 11A, 13A, and 15A, Does the stat panel ALWAYS receive a analog signal? If ARC is turned off, is the signal going to the woofers analog or does it...

Then it's not loud enough if you can hear the "cries"! Congrats on the new Focus!

Well, after replacing a failed High Voltage Power Supply for the mid-range stat panel, I decided to take the opportunity of having the speaker on a nice work platform and remove the front grill to vacuum the stat panel. The speaker has been in use just over 1-1/2 years so there's got to be some...

Some circuits are designed to discharge capacitors, like some old guitar amps which can drain the caps when power is removed. Even so, I still measure the caps to verify that no volts remain. If there is any question as to if voltage is being stored anywhere in a circuit, assume it is, then...

It was easy. But I'm used to tinkering with things. Ron sent detailed info with photos for getting into the back of the speaker and noting the connectors involved. In my case I only needed to remove the connectors on the HVPS board.

A few things just for the record. As with any electronic item, caution must be used! I use the One Hand Rule when poking around in anything electrical. If one doesn't know what this rule is, then one should learn the value of it before tackling anything dealing with electrical items. There are...

Ron sent the HV Power board and it arrived today! The new board is installed and the Focus is working again!! Thanks Ron at ML Support!!!

How large will your room be? I can't help with your listed choices for LCR, but with regards to using the 4i or 2i, I would recommend using something with larger woofer drivers. I have four 4i speakers. It began when I was in a smaller room and bought a pair for Surrounds when I first went to...

Well Ron to the rescue!! He's shipping out a new HV Power Supply! Seems like the most likely source of the problem. So I won't need to wait for the resistor, and in fact he suggested that I cancel the order. This is the only warranty issue I've had with over 20 ML products. I've been very...

It was Ron who responded at the start of business today. Very quick response indeed! I indicated that I am capable of disassembly and electronics checking, and that I would prefer not to have to ship the speaker. So he gave me instruction to measure the stat power supply, which means I had to...

Third guess is that it could be a bad connection to the stat panel.

Yes, it's under warranty. My first guess is something is wonky in the internal power supply section. Second guess is something might have failed in the crossover, but I would think this is pretty unlikely.

The stat panel has very little, or no output. This results in muffled sound, especially noticeable with voice, and is easily seen with REW sweeps which show huge drop-off between the crossover points. The blue Status LED lights up, and I checked the voltage of the power adapter to be 15VDC, but...

This.