I am fortunate to own speakers produced by Martin Logan, Infinity, Klipsch, Sound Dynamics, Cambridge, Polk, Bose, LEAK Sandwich (Concert Speakers) circa 1968, Andrew Jones Pioneer Floor Standing & ELAC B6s, etc. So I have a chance for fair evaluation among many different speaker brands. My amps and receivers are also comprised of many different brand names, including Cambridge, Carterm, Pioneer & Onkyo, etc. My Energy C6s literally "explode" with sound that constantly amazes me. The only speakers that give me as much listening pleasure and probably the most pleasing to my ears as my Energy C6s are the LEAKS. The Energy towers with grills on are off deliver natural, clear highs and lows that make listeners look for the sub-woofer that doesn't exist. Well recorded vinyl albums, CDs or streaming music will make the hair stand up on your neck. They do take about 100 hours of low volume break-in to deliver such great audio, but after that, pump up the volume on your favorite music genre and "rock out!" The Energy C6 is highly recommended. And if you ever get to listen to Classic LEAK Sandwich Speakers don't miss out on the opportunity. Just make sure they have been lovingly maintained.

Good bass response, crisp highs after break in period.

Really do need a lot of amplification. For some, not a weakness at all!

I just want to keep this simple. Great speaker! I have been to many soundrooms looking for an upgrade and just can't seem to find one unless i want to shell out another $1500 on top of what i paid. i use these for music listening and they sound wonderful with my Rotel 980bx amp. For those of you complaining (see below) about sound my advice is this. Drop the sub par yamaha amp and get a real amplifier. Even at 110w per channel with my Rotel, i find these speakers could handle more power. That's my only complaint, these speakers need power to fully appreciate...

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Polk Audio rt600i
audio research

Great sound. Very good value. Ages well.

Hard to find now, since they are discontinued.

This is a great speaker that I've owned for five years now. I've compared it to newer models from NHT, B&W, even the new Energy models, and I still love the originals. I have money to upgrade but I don't because I can't find anything in a local store that makes me want to get rid of my C6s. A few notes on previous reviews: some say the tweeter is bright. Yes, upon first purchasing I noticed that too. But after about 30-40 hours of playing, they "break in" and become very smooth and accurate. I don't know why they're a little harsh at first, but after a short while they settle down quite nicely. Another reviewer said "don't play them loud" and I don't know what his basis is on that, except that he uses a Yamaha RXV1000 which may be underpowered (read: http://www.geocities.com/Area51/Hollow/3401/ratevsac.htm to see that the Yammy rates at 100wpc but performs at 78wpc). I have NAD separates (known for their accurate, actually ultra-conservative, power ratings) and I can tell you that these bad boys go as loud as I can stand without getting harsh or bottoming out. Of course I also have a subwoofer so that may help keep them from bottoming out. The beautiful high gloss finish really makes these speakers look good in my living room, and people comment on them quite frequently (in a positive way). I've owned these speakers for four, nearly five years and have yet to find anything in its price range that I want to purchase. Like a fine wine the C6s get better with age.

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NHT SuperZero and SuperOnes, Energy e:XL series, B&W 6xx series, Axiom and Ascend speakers.

Nice black gloss piano finish.

- Harsh high end when playing loud (while using mid-range HT receiver). - Tweeter does not have wide dispersion.

I had these speakers for almost 4 years now. I made the purchase based on Engergy's marketing and user reviews found on this site. Sound: very good and clear if you don't play them loud. I am using Yamaha RXV-1000 to drive it. As you crank up the level, there comes a point when the tweeter just "hang loose" and you could hear a lot of unpleasant harmonics. Other reviewers mentioned that you need to have high quality amps to drive these speakers but I am wondering how many people out there can afford a stand-alone amp. Imaging: not as wide as I hoped. It's easy to locate the high frequency source. The lower cost bookshelf B&W DM303 has wider sound stage. Conclusion: Price to performance is good, but not outstanding. I am not an "audiophile" but I know what sounds pleasant to me and I would say that Energy's sound is a bit harsh for my liking. Some say B&Ws are "dull" (i.e. not bright) but these fit my taste better. Mission speakers sound good too. Equipment used: Yamaha RXV-1000 HT receiver 100Wx5 Onkyo HT receiver 55Wx2

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Energy AC300, B&W DM303, B&W CLR3, Mission M71

Frequency range,soundstage,great stereo imaging,fast bass,very crisp and clear treble(alu dome tweeter).

They can have a bit harsh treble when playing bad recorded opera cd´s.

These loudspeakers are just great.Before i bought them(in 1995)i listned to many other,but ENERGY C-6 where the best.I compared them to speakers at twice there price(2500$) (handbuilt Danish speaker brand called F3/Lyd)wich made only a half as good stereo image as the c-6´s.I have also heard speakers at 5 times there price only playing marginally better.They are very good at placing the instruments in a ochestra correct.They can reproduce any kind of music with no trouble at all. They have a fast bass,a clear treble,and look great.I have mine coupled to a SONY Cd-player(CDP-X 505 ES)and a SONY Amplifier(TA-F 707 ES).They are biwired.Still i havent found any speakers at the price of the C-6,who sound as great as them.Thank You ENERGY.

Frequency range, sensitivity (91Db), imaging, soundstage, PRICE!

none

The Energy C-6 is a killer speaker. First of all, it has the frequency range to accurately reproduce all the tones of most music/instruments. I don't understand how other manufacturers can claim to make realistic sounding speakers when their bass rolls off at 60Hz. Here we have a true 30Hz-25KHz range which really provides a meaningful difference and in my opinion puts them leagues ahead of any similar sized or priced B&W, PSB or Paradigm product. Beyond the technicalities, these are just neutral, musical speakers. You don't spend time listening to THEM, you spend time listening to the music. For the price there is no competition.

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Energy C-2, C-4, B&W DM602S3, B&W CDM1NT, Paradigm Monitor 7se

50 hours of break-in needed

Just thought I would update my review. I purchased my C6's back in the summer of 99 and when I brought them home I could stand the ear piercing Highs. Idid keep Them however. After about 50 hours of play them when nobody was home I was just amazed. to thin I almost gave these Babies up.
Any way I have them Bi wired now and they even sound better
Hope i didn't stop anyone from buying them. They are great speakers for the money.

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B$W

Wonderful soundstage, Nice bass, A terrific blending of all sounds

None

I have had these speakers for 5 months and are truely a wonderful speaker. Although not power hungery they need a good receiver. I have a 95 W Denon and prior to buying listened to them on an HK, Sony, and Sony ES, and Technic. The HK and my Denon make this a wonderful speaker, but with the Technic,Sony,and Sony ES they are just boxes with sound coming out. Initially they were a little harsh on the highs and lacking in the midrange, but after a few weeks of breakin they changed into the great speakers they are. Although a little pricey in the US, buying them in Canada makes them the best speaker for the money that you can get(especially if you can find a cabinet second)

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B&W, Polk, Paradigm

good, very good, gloss black

The price and performance is excellent. Good for ppl who are looking for high performance with reasonable price. This is your first choice

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B&W

EXCELLANT SOUND STAGE,AND STEREO IMAGING
BEAUTIFUL CABINETS (piano black finish)

BETTER SINCE I HAVE ADDED A SUB BOX

HATS OFF TO ENERGY SPEAKERS.THESE ARE THE BEST SPEAKERS I HAVE EVER HEARD.I USE THEM IN MY SURROUND SYSTEM AND DVD MOVIES HAVE NEVER SOUNDED BETTER......
I BI-WIRE THEM AND THIS IS TRUELY THE WAY TO GO