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Published LessLoss Reviews Now Number Over 697

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C-MARC loudspeaker cable, stereo pair

Date Added: 10/27/2023 by Mac Finney, Baltimore
After some days of burning in, I’m now hearing the lovely, balanced & highly nuanced characteristics I was hoping for…and much, much more. The beautifully crafted, highly flexible LL speaker cables are more resolving than the 3x more expensive wire they replace.

The crazy amount of detail hit me first. Shimmering detail. Nothing harsh about it. Bass is fast, taught & musical. Transients to die for. Head-turning attacks & decays that float away into inky black darkness.

Without drawing attention to any one strength, this speaker cable does everything well. However, in my opinion, the cable’s ability to reproduce vocals has to be one of its most impressive and appealing calling cards.

This is the stuff that “end game“ speaker cable is made of & one that deserves serious consideration no matter the budget.
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C-MARC loudspeaker cable, stereo pair

Date Added: 09/06/2023 by David
The C-Marc Entropic speaker cables have done wonders for my system,which consists of Accuphase electronics, Magico S7 speakers and products from Clearaudio,MY Sonic Lab and Synergistic Research.
Since about 2019 I had been using the top-of-the-line Synergistic Research Galileo SX speaker cables that were purchased for over 15k and I though I had finally achieved a level of reproduction that would satisfy me for the foreseeable future. I was wrong. I've come to realize that just throwing money at a problem is not the solution to better reproduction... it just makes you poorer.
The C-Marc Entropic speaker cables for a third of the cost of the Synergistic Research have elevated my listening experiences and allowed me to make a stronger and more satisfying emotional bond with my music. I wish I had known about LessLoss years ago.. I could have saved not only money but what seemed like a never ending frustration with constantly trying to achieve the best reproduction from my gear. With these cables I think my search is finally over. Now I can relax and just enjoy the music like never before.
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C-MARC loudspeaker cable, stereo pair

Date Added: 05/02/2023 by Aleksandar from Serbia
After buying the Entropic RCA Interconnect cable, I decided to buy the Entropic speaker cables as well. For the first time in my life I hear music exactly as it is intended to be heard: absolutely no artificial coloration or any unnatural flavour is added. State of the art high end products without any doubt.

As for Lessloss as a company, rest assured that they will always go out of their way to do whatever is need to keep the customer's satisfaction at the highest possible level.
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C-MARC loudspeaker cable, stereo pair; Blackbody; Firewall Module; C-MARC Classic Power Cable

Date Added: 07/18/2021 by Joshua J. Wright
When I first read about the LessLoss technology I was a bit skeptical. Since I already loved the way my system sounded I had difficulty believing that it could sound even better than it already did. Louis assured me that I would be impressed, so I took the dive. The first thing I tried was the C-MARC power cords with ENTROPIC treatment. The 2 power cords were applied to the DAC and to the pre-amp. At first the sound seemed to close in and become less involving. By the 3rd day of listening it became apparent that I was hearing sound that was more coherent, and phase correct, producing a more musical overall result. Inner details, textures, and the bass all took a significant step forward. After experiencing these effects I went ahead and added 2 untreated Reference level PCs to the amplifiers which resulted in magnifying the effects noted in the DAC and Pre-amp.

After the power cords I was curious about what the Blackbodies (total of 4) would do for the sound. This addition caused the most significant initial sonic degradation of anything I have ever added to the system. It took about a week before the benefits became fully apparent. Strangely enough the biggest improvement came after leaving the system off for a week. When I turned it back on the sound had totally transformed. It was as if a switch had been flipped bringing everything together. Suddenly there was a clear open window of sound with extended decays and sustains surrounded by the acoustic space specific to each individual venue and recording technique. All frequencies were proportional, gone was the bass heavy bottom up effect I had noted earlier during the initial break-in period. Also gone was the increased dynamic slam and exaggerated dynamic contrast that was previously prominent. What remained was a very natural balanced, and detailed presentation free from any detracting artifice. The background was much more quiet, allowing the tiniest details to emerge effortlessly, as if being spontaneously emitted from the space in between the speakers. The imaging was excellent before, but now it was if the speakers actually ceased to exist. The sound also became more concise, focused, and clean; making it apparent how much extraneous noise was infiltrating all aspects of sound before the Blackbodies were added. Initially this effect made me feel like I was missing certain aspects of the music, but over time it became apparent that it was only distortions that were missing, as new worlds of detail were exposed from old familiar recordings.

After all of this I could not believe that the sound could get any better, but Louis provided me with this quote from another customer. “How the heck could I even listen to it and rejoice in it back then?” This from a customer who thought it could not get any better. That was the exact feeling I had after installing the Firewall For Loudspeakers. In total I have added 4 sets to the speakers. I could have easily stopped after the the 1st set, as the improvement in tone, micro nuance, and overall integrity of the sound was beyond anything I could have expected. However after adding the 2nd set I too was saying to myself “How the heck could I even listen to it and rejoice in it back then?” The whole sonic landscape elevated particularly in the bass region which became even more effortless and detailed. It was as if the whole system was upgraded. The music was just “there” without any veils or resistance to most minute details. The sound was fuller from top to bottom, with more life like nuanced transients, and deep deep views into the sonic fabric and the most delicate textures and tonal inflections. The system never sounded this effortless, as if it had become super-conductive and friction free. Talk about lifting veils. Consequently I now have 4 sets of Firewall for Loudspeakers installed.

At his point I thought there is no way things could get any better, but as it turned out I was wrong, again. Louis built a custom set of Jumper cables specifically designed to work with Avantgarde Trios with BassHorns. These jumper cables were made of C-MARC, ENTROPIC cable with a DIY Firewall For Loudspeakers as junction splitter box. As usual there was an initial sonic suck-out upon first listen, but over the course of the week the sound again blossomed into something I have never before encountered from the system. Even after adding all of the other LessLoss devices, the sound again took another leap forward. It is not that I didn’t think the system sounded good before, it’s just that the improvements were of a type I had not yet experienced. All of the other improvements to the sound were still present, but were now being presented in a new light. The soundstage, imaging, and acoustic space all seemed come together to form an aural illusion so seductive and infatuating that I cannot stop listening and rejoicing in the sound. This type of sonic improvement is difficult to put into words, but after you hear it you will know exactly what I’m talking about.

Effortless, organic, liquid, holographic, 3D sound reproduction appears to be a byproduct of not just eliminating noise from all power and signal carrying cables, but of also reducing the effects of environmental EMI and RFI which can permeate every component. That is exactly the result I feel has been achieved from using the LessLoss devices. It is very difficult to say which device has had the biggest impact, but I can say that they appear to work synergistically. Individually each device has made sonic improvements which after hearing I did not want to live without.

My compliments to Louis and his organization. They have have proven to me that it is in fact possible to improve on even the most impressive sound systems, regardless of how good they already sound.

Associated Equipment:

The entire system has evolved over the last 17 years. The only components that still remain are the speakers and upgraded versions of Audiopax Model 88s which were upgraded to MkII status in 2009. Every component including the cabling, electrical conditioning, vibration control, and room treatments were all selected after careful auditioning and confirmation of their sonic synergy with the overall system. Consequently, each addition has advanced the sound in a desirable direction. Many components have come and gone to arrive at its current state.

Roon Nucleus: music server

Lumin U1: music streamer

AQVOX: CAT 7 ethernet cable on all internet connections.

AQVOX: Ethernet Switch (between Modem and Lumin)

Berkeley Alpha DAC Reference II with MQA

PS audio Signature BHK: Preamp

Audiopax Model 88 MK II: Monoblock Amplifiers

Avantgarde Trios with Basshorns: Speakers

Video: Oppo UDP-205: Universal DISC player

High Fidelity Cable Co: For all Power conditioning and line level, and speaker cables

LessLoss jumper cables

LessLoss Technologies: Power Cables to all components via HFC Professional Series power distributor

LessLoss Firewall For Loudspeakers (3 stereo pairs, one for each speaker driver and 1 integrated into jumper cable junction box)

Room treatments:

20 inch ACS stereo tube traps

Corner ceiling traps.

Grand Prix Monaco: Equipment Stands with Apex footers and ceramic ball bearings.

All stand legs filled with ferrous steel shot.

Support shelves upgraded to 3/4 inch glass.

All footers, shelf spacers, and tube dampers are from Herbie’s Audio Lab.
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C-MARC loudspeaker cable, stereo pair

Date Added: 03/26/2021 by John Voloudakis
Replaced "Black Box" cables costing twice as much and being half as efficient in transporting my vintage Sound Labs to a new level.
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C-MARC loudspeaker cable, stereo pair; C-MARC RCA unbalanced signal cable, stereo pair; C-MARC Classic Power Cable

Date Added: 12/12/2020 by Harold
I have looked at many designs of high end cables. None of them stand out in sense and simplicity like the C-MARC cables do. All the variables that influence sound (capacity, inductance, skin effect, strand jumping, dielectric constants etc.) are optimised in the most elegant solution I can think of.

Having made me very curious I bought some about 3 months ago, starting with one Entropic Process Power Cord, a pair of interconnects and standard C-Marc loudspeaker cables.
I was so impressed that I decided it really pays off to feed all the equipment with Entropic Process Power Cords.

Most impressive is that all the glare and aggressiveness in the sound I was used to in some recordings completely disappeared. And this without any loss of detail and speed.

Violins that are meant to sound fierce, like in Shostakovich’s string quartet no.8, can sound too harsh in a resolving system, even when played with the best equipment.
I love the energy of Isabelle Faust but superimposed with high frequency noise it is hurting my ears. Listen to her solo in Beethoven’s violin concerto and you will know what I am talking about. Jimi Hendrix surely would be impressed.
During crescendos of large choirs it may sound like the microphones were clipping during the recording, resulting in nastiness in the high notes.

Recently I upgraded the speaker cables to the C-Marc Entropic Speaker Cables. They take away that last bit of glare and let you experience the instruments and voices in its pure essence. Music sounds so true to life, it is very difficult to put in words. You can feel the instruments themselves bringing the air into motion.

C-Marc cables don’t add or emphasise “a taste” to the sound. C-Marc cables are like Tai Chi masters, they just let the energy pass through without wasting or blocking it.


Equipment: Streamer Melco N10, DAC Sonnet Morpheus, Amp Bakoon AMP-13R, Speakesr Bastanis Matterhorn mk2. Other cables: Fidata ethernet, Curious Evolution USB.
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C-MARC loudspeaker cable, stereo pair

Date Added: 11/30/2020 by Andor
Before purchasing the C-MARC Entropic Process loudspeaker cable, I wondered if it was worth the extra expense compared to the original C-MARC. Now I know: absolutely!

I was very pleased with the earlier version, but the fantastic experience with Firewalls, Entropic Process power cables, and Firewall for Loudspeakers, suggested it would be good, even though I had no idea how good it was. The cable is constantly still running in, but from the beginning it was simply much better than the previous C-MARC speaker cable.

The previous reviewers have already described it, but what's obvious to me:

- Huge space,

- Musicians in the room!

- Great progress has been made in the separation and placement of instruments. I've never heard the high notes sound so beautiful.

- Mid-range expressive and detailed, with previously unheard sounds, air quality, spatial positioning.

- Fantastic purity I did not expect!

- And the dynamic slam goes down like never before.


Very cool. The Entropic Process loudspeaker cable almost kicked the door in and my chin nearly fell off. Oh my God! In my opinion, this excellent cable will soon be rewarded with a prize of some kind!

What I love about LessLoss products is that they make the listening experience very easy and without fatigue.

Thank You, Louis, again!
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C-MARC loudspeaker cable, stereo pair

Date Added: 11/13/2020 by Matt Shelton
I received my entropic c-marc speaker cables quickly. They replace some older Lessloss cables that I picked up used, and for which Louis gave me a generous trade-in. I try to resist hyperbole, but am back in the throes of head-over-heels love as I am forced YET AGAIN to concede that the sky is the absolute limit in terms of what adding new LL elements to my already heavily Motek'd system will do.

All the things I raved about in my March review of the speaker Firewall filters are significantly further enhanced. My music is sounding even better at both softer and louder levels, hard for me to believe since it was already so enjoyable. It sounds so easy yet dramatic. Somehow, even though the intellect knows recorded acoustic music is still not quite real, the heart is happy to be fooled. There is no effort. Belief no longer must be suspended.

Please, prospective purchasers, you haven't begun to hear your gear at it's best until you have sorted your power cords and cabling with the best Lessloss product you can afford. Honestly, you can save $$$$ into the future by NOT needing to upgrade your system components once you have unleashed your speaker cones the Lessloss way. For the record, and like Louis, I am a professional musician, playing in orchestras and big bands, and I no longer feel cheated when listening to classical and acoustic on my system. Other genres can absolutely kick ass too. Excellent music in, absolutely stunning out...

After a nearly 40 year hifi journey, I have stopped missing a few components I stupidly sold along the way and am truly happy with my modestly ( cost-wise) high-end system. I am struck with sadness for designers and producers of hifi who maybe never heard what their gear could truly do, without the very best attention to the issues that Lossless has tackled. Maybe a few lucky ones did.

Another honest-to-goodness breakthrough success.
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C-MARC loudspeaker cable, stereo pair

Date Added: 10/20/2020 by John Zermani
The sound of my system last night was so immensely better than the night before that I’m at a loss to understand how cables or break-in could possibly result in the magnitude of the improvement I hear.


My “review” (below) of the C-MARC Entropic Process cables was premature, it seems, and my comments are nowhere near positive enough.


You are welcome to use what I wrote, but when I finally come to terms with what these cables can do and have done, I may be compelled to write another assessment.


Thank you for your years of effort; the results are greater than I could ever have imagined.



I received my new C-MARC Entropic Process loudspeaker cables on Wednesday, Oct. 14th.


I put them on my Cable Cooker for 3 days as this has always been essential for maximum sonics in my system; even when the manufacturer has instructed that it is unnecessary or not recommended.


After cooking, it normally takes ~ several hours of real music to fully maximize sound quality.


My reference speaker cables for the last 3 years have been Nordost Frey 2 cables (as the Valhalla and Odin cables are too much of a good thing = not good) because they are the only ones I could find that were both fast enough (the fastest so far) neutral enough (a bit cool sounding but not bright), very transparent with excellent resolution, and, most important: They get the timing right. This is NOT about speed; it is about all the notes, bass to treble, arriving at the right time with no smear or delay and with proper decay. No other cables I could find could do this. I had no options; but I was satisfied.


Given my results with your Speaker Firewalls and your power cables, I decided to try your C-MARC Entropic Process Speaker cables in the hope that they might provide everything the Frey 2’s provide and even more. The Early Bird discount offer made them that much more attractive.


I am pleased to report that I think I have found the only other cables that get the timing right.


But it’s much more than that: These are very “fast” cables, very transparent, with even better resolution than Frey 2 and better “body” and “weight” as well. Voices are a bit more ”human”, woodwinds and strings are a bit more “woody” and “stringy”, and the sense of reality, of being present at a “live” musical event, is significantly enhanced.


These are definitely not “warm” cables. The weight and body they portray are not bloated or “euphonic”. Neither are they “cool” cables as many “fast” and transparent cables can be. Instead, and in my system, they take me to the recorded venue where I hear, and experience, what I can believe I would hear and experience if I were present at the time the recording was made. Absent being there during the recording, one can never be sure of this of course, but the sound rings true to my many decades of listening to performances of live music. They seem to be the most dead-neutral cables I’ve yet heard; adding or subtracting little or nothing.


AND: They do this better than any others I’ve yet heard.


Your C-MARC Entropic Process cables are a magnificent accomplishment. As they are likely not yet at absolute, maximum performance (though very close) I am eager to hear what they ultimately achieve.


Thank you for a great product that advances the state of the art.


John Zermani.
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C-MARC loudspeaker cable, stereo pair

Date Added: 10/11/2020 by Joerg Meinhardt
The brand new entropic speaker cables!

Lucky me, could purchase the new entropic treated C-MARC speaker cable before it hit the online store.

And this time, I will directly jump to the essence of my review:

Another fantastic LessLoss product, that I have to recommend full hearted.
Go for the Early Bird offer until Oct 19th !!!!

For the more interested, read on about my story with these cables.

As mentioned in my last review about the (non entropic) LessLoss RCA cable from Sep 19, I had RCA and speaker cables made by the manufacturer of my beloved Lavardin ITx-20 integrated SS amplifier. The cables are very neutral, natural, clean and clear with good reviews. So I was not looking for replacing them due to bad behaviour, but because my previous experiences with LessLoss products were so great, that I just had to finish my cabling with LessLoss. Right after I received the RCA cable, I heard, that Louis was ready to produce the C-MARC speaker cables with entropic treatment and offered to sell it before the official start. Of course, I ordered immediately.

So the RCA only had 5 days to burn-in, before the next change came and there were 2 burn-ins in parallel. But I am not a researcher, so I don’t have to separate these events :)

Another information, I cannot give, is the difference of plain C-MARC speaker cable versus the entropic version. In the review of the C-MARC power cables with entropic treatment, you can see my judgement though against the plain version, which I owned before. It will most likely be the same here. I already experienced decades ago, that the same cable used for speakers or for power (or even for interconnect), will have a similar sound improvement. My remark about the entropic difference was “more meat on the bones, richer timbres and more precise space, which all pays into the more natural bucket.” … see review from May 21 this year.

Now let’s see, what exactly happened here with the change of the speaker cables. Amazingly similar to the improvements of the RCA but additionally on top and a lot more. Besides the “More organic sounds, especially with voices, but also bells or plucking strings and all the rest :) Everything more palpable, widening stage in all directions, better controlled bass and more powerful.” there was a lot more completeness, self evidence, engagement, being there, floating in the music … kind of like a trip with drugs, but healthier :)

For further improvement, I will have to wait for the RCA upgrade to entropic, but meanwhile I will upgrade my Living Voice loudspeakers to the highest in the line with outboard crossover. So 2 more loudspeaker sets to connect the crossover with the loudspeaker …. Guess what, those will be. And the crossover need good feet …. Of course LessLoss bind breakers.

Sorry, if I sound like a fanboy …. But I am one, who is critical, but so far always very happy with the LessLoss products. And they all fall into the same direction and work really well together … no coloring and organic and palpable and blacker.

Thanks Louis and team, you have done it again!!
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LessLoss History From the Very Beginnings

LessLoss started its business on Audiogon in late 2007. Within the first couple of month, word about LessLoss spread like wildfire among Audiogon members. Here is the feedback received from our clients during our first year of operation. This is from even before we had our own website.

Louis is one of the best in the business, truly professional and very fast production and delivery. I am very satisfied by your superb service. Many thanks.

Positive by Buyer Sebastian (135) on 07-29-2008

Excellent transaction with Lessloss on dynamic filtering power cord. Good communications & fast shipping. A+++++

Positive by Buyer Sennett (45) on 07-03-08

Bought 3 pc's from Liudas in Jan/08. Outstanding product as advertised. Performance is everything and more than I expected. Kudos to Lessloss cable for a great product. Very highly recommended...A+++

Positive by Buyer Phillykid (33) on 06-19-08

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