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Same Peerless SLS 12 woofers. My understanding is: A woofer is forced to behave differently in a Ripole than in a conventional sealed or ported box or even an open baffle, especially with respect its resonance frequency relative to it's resonance in free air (FS). And this resonance is the...

My previous subs (built just last year) sound fantastic. I wanted to build a smaller version and I had expected a trade off in either quality or efficiency but I honestly cannot hear any difference, and these smaller ones are so much nicer aesthetically... it's just awesome! Actually, I was...

The woofers are the 8-Ohm versions of the Peerless SLS 12, wire in parallel push/push, which makes it a 4-Ohm load (a bit less, as the woofers' impedance are a bit lower than advertised). I use a Carver TFM-25 (225 W/Ch) but they don't stress the amp at all so I'm thinking 50W/Ch would suffice...

Hi all, I've built several pairs of Ripole subs in recent years, and I’ve just completed new pair which are smaller and more compact than any I’ve ever built with 12 inch woofers (Peerless SLS). I love the compact size!
 I finished them today and this evening I've been enjoying some very...

Welcome Tom, I'm in GA too... Savannah. What problem are you having with your speakers? I don't know much about ML's (I don't own ML's) but I'm an ESL builder with a basic knowledge of their operation. Maybe I can help. Welcome to the forum! Charlie

I've used Licron Crystal for some years with no problems so far, but after reading other builders' reports of it failing over time, my confidence in its longevity has waned, and I'm now looking at other coating options. I'm not planning any new speaker builds but if the Licron coating fails in...

To power a full range ESL you could just size up the VA rating but a better option would be to use six of the 50VA toroids per speaker, wired parallel on the input side and series/parallel on the output side, as opposed to two larger transformer wired in series on the output side. The...

Brandon, Congrats on a great project! I have no reservations about recommending the tandem pair of those inexpensive 50VA toroidal transformers. I've been using them for many years, driving them with multi-hundred watt amps with no problems. I especially like the pristine highs. I...

An "arc" is an electrical spark", and it typically makes a "pop" sound. And I believe the rapid pops I hear in the video of your panel playing is arcing. Before you take the panel apart, it's a good idea to connect it to the power supply and play it in the dark. In a darkened room, the...

I was hoping someone else on this forum with experience refurbishing ML panels would jump in and save the day. The panel is arcing somewhere, probably from a corroded diaphragm connection, and if the front stator is bonded on, I can't imagine getting it off and leaving the diaphragm intact...

The red wire has to be the bias wire because it enters between the stators. The problem is accessing the contact area. BTW; I build DIY ESLs (not a ML owner) and I'm not that familiar with how the panels are bonded. I believe all ML models use double-sided adhesive tape to bond the panels...

I should have read thru the entire thread before commenting earlier. OK; the problem is in the panel and there is obviously arcing going on. The symptoms you describe (sometimes plays and sometimes doesn't) leads me to believe the arcing fault is occurring at the bias supply...

If the panel itself were arcing that bad it would likely have burned thru the stator coating, shorted catastrophically, and tripped the protection on your amp by now... I'm thinking you have something going on in the bias supply (cold solder joint arcing, leaking capacitor, or a diode starting...

I’ve only just seen this post or I would have responded sooner. I’ve recommended Licron Crystal on my website for some years now, so I feel a certain responsibility when someone reports poor results with it, as well as a desire to figure out why. Although I’ve used Licron Crystal for almost...

The ear pain could be an unstable amp distorting under the low impedance load, or perhaps it's just that ESLs tend to have a rising frequency response that can be downright harsh if not equalized away. The response around 2.5kHz - 3kHz can be especially harsh. I tune out harshness in my ESLs...

I used to have DIY flat panel ESL's which beamed like crazy and the sweet spot about 1ft wide. This was great for solo listening at the focal point, but useless for someone sitting right beside. I found that the best compromise to get a two seat-width sweet spot was aiming the left speaker...

I've used several different DIY cables, including the very expensive cross-connected, Teflon jacketed coax cables recommended by Jon Risch. My experiences may differ from that of Martin Logan owners because my homebuilt ESLs use a different (resistor-segmented) panel design which is an easier...

Thanks, it's super simple and reliable. I'm using a digital crossover and bi-amping so there are no crossover components in the interface-- just the tandem step up transformers and bias supply.

I've never washed a panel and don't know the answer to your question, or what the recommended procedure is. However; I will caution you that most dish detergents contain a conductive salt called sodium laurel sulfate. And in fact; liquid dish soap is often used by DIY ESL speaker builders...