innersound isis Among the perennial hopes for audio designers is to merge the dynamic punch and extension of box speakers with the purity and clarity of box-less electrostatics in the higher frequencies. Hybrid speakers with box woofer plus electrostatic mid-tweeter appear regularly and possess for many years. (About the most audiophile do-it-yourself projects from the Fifties ended up being to put together the Jantzen electrostatic tweeter with assorted box bottom ends; a number of the resulting speakers were exceptional for time and could have their points to this day). But with rare exceptions, those designs past and provides have not really jelled. Sooner or later the ear latches onto the discontinuity between the box woofer and the electrostatic, also it stays latched on. Once heard, the discontinuity becomes increasingly annoying and that's the end of that speaker. Like college boys in the old song, hybrids appear and vanish but mostly go.
The InnerSound Eros is an additional try. And by George, this one works! The Eros really does solve the integration problem. To my ears, it really is as coherent as speakers with two dynamic drivers, and indeed more coherent than many of them. The outcome is a speaker with extraordinary virtues and few failings. It is smooth, sweet-sounding, clean, and pure, with superb stereo imaging performance. This is one hybrid that wont wear out its welcome.
innersound speakersLike a magic show, the Eros calls in the question: How's it done? Part with the fact is only the alert and careful experimentation how the design involved. Roger Sanders, the designer, is a well-known expert on electrostatics. (He literally wrote the book on the subject he will be the author of the standard reference work about electrostatics). And he's got been at the office on this design for some time. But there are two explicitly describable things within the design that separate the Eros off their, less successful hybrids. First the box woofer, which is a transmission line design, is very clean, precise, and nonresonant. I'll be darned if I'll call a woofer fast since that's not what a woofer could be, but when it weren't the wrong word, it might be the best word for this one. Second, the crossover from box to electrostat is greater than usual, at around 450 Hz, and it has steep slopes (24 dB/octave).
Traditionally, folks have attempted to run their electrostatic elements down as small as possible, to try to make as much of the sound electrostatic as you possibly can. The trouble is that down at say 150 Hz, a dipole electrostatic element is interacting with the area way differently from the pretty much omni box-woofer. This discontinuity of radiation pattern is nearly guaranteed to be audible. In the Eros, the crossover point is high enough the dipole's room interaction, especially its differentiation against room modes, isn't so obviously different (room modes are very closely spaced by 500 Hz). Also, the electrostatic element doesn't have to use so far down into the spot where dipole cancellation gets to be a major problem. So the woofer can be rolled off steeply, since it does not need to help out the electrostat above the crossover point. Anyway, those are my guesses as to the reasons it works. But the real point is, it will.
innersound speakersIn ways that if dipole operation is not so important above 500 Hz, then why make use of the electrostatic thing at all? Why not only use dynamic drivers on top too? The electrostat has other advantages, however. First of all, it has suprisingly low distortion. It is hard to get anything such as this clean an audio out of a box mid/tweeter.
The second point might be a more techno, nevertheless it counts for plenty. The electrostatic aspect in the Eros is forty inches high. This implies that from say 1 kHz on up, the speaker is beamy inside the vertical direction. There aren't any reflections up and running or ceiling within the higher frequencies. And in terms of that, because dipoles do not radiate sideways, you will get rid of the first sidewall reflection too, if you set the speakers up right. The first reflected highs you hear arrive in regards to a week later than the direct sound. The result's the Eros sounds so clear you almost can't accept it.
I listened firstly course, however couldn't resist a bit impulse response test. Result: pulse in, first arrival, then nothing in the high frequencies for 15 milliseconds. Pretty amazing. No wonder the Eros sounds clear and in addition offers extraordinary comprehension of the acoustic environment with the recording. You aren't hearing your listening room for a long period, and not a lot of after that it.
The Eros is really a biamplified system. But the cost carries a built-in amplifier for the woofer units, combined with necessary electronic crossover. You give you the amplifier for that electrostatic upper frequencies. The great thing about this arrangement isn't that a lot power is needed from 500 Hz on up. (It is bass that eats power). I wouldn't recommend a microwatt SET, but you will get big volume music from the medium power amplifier on the top here. You do need an amplifier though that doesn't mind the truth that the burden is capacitive, and as a result of 2? at 20 kHz. (Some amps goes in to a tizzy, and present a rising, ringing top). If you have to, you may also use another amplifier of your personal for that bass the electronic crossover has outputs for your but I can't realise why you would like to.
The amount of the woofer is adjustable so you can accommodate amplifiers of numerous gains easily. You should not use the control like a bass level adjuster as such, however. There is going to be only a narrow range of levels of which the woofer and electrostat blend to provide a built-in and uncolored midrange. Discover that level by leaving the control there. (In order to boom your bass occasionally, buy a tone control).
Just how does the Eros really sound? The bass is clean, precise, and reasonably extended. It won't go down to earthquake or 32' organ stop territory, but there is ample extension for orchestral music to have its foundation. And the bass is very smooth and non-resonant. The midrange can also be smooth, largely uncolored, and well-integrated. There is a touch height sensitivity from the interaction between the woofer and the electrostatic element, but at usual seating heights and usual distances, all is well. In my room, when the bass level was set to produce the smoothest transition from woofer to electrostat and to provide the lowest coloration with the mids, the midbass and bass were slightly down in level. There is also a little relaxation in the presence region, so that the overall sound was slightly midrangy. (Within the high treble, the particular level comes home up some). This balance flatters plenty of material (e.g., a person's voice), and in addition it appears to be the type of balance that recording engineers anticipate. Monitor flat (which is seldom delivered by monitors!) appears to make most material sound too aggressive. In nevertheless, it really is difficult to imagine anyone choosing the Eros balance certainly not attractive. And as noted, the sound has an almost magical clarity, along with a clarity not at all purchased on the cost of exaggerated presence quite contrary in terms of tonal balance. The speaker is simply clear of course, intrinsically clear.
Now we arrive at a special feature from the Eros. It is not a problem exactly, Actually, I contemplate it an edge. But you do need to know regarding it. The thing is, the Eros speakers are beamy within the high frequencies, not merely vertically when i mentioned previously, but horizontally, too. When you sit down to pay attention, then you've got to be capable of see yourself reflected in the electrostatic diaphragms speakers pointed right to you or say so long for the high frequencies. This beaminess actually gives a kind of precision and solidity of stereo image that you won't get if your speakers are flipping high frequencies all around the room. And it is possible to have fun with it a little to get a number of the time/intensity tradeoff stability from the Ohm 300s I talked about a few issues back. (Some however, not all of it the Ohms are essentially unique there). But the beaminess might be not the same as what you are utilized to and it may take a little getting accustomed to it. The beaminess entails that only 1 listener will hear the ideal imaging and tonal balance, even though rolled-off highs on the perimeters are not disagreeable. One could of course set up the Eros audiophile style inside the negative feeling of pointing them along the area with lots of backwall reflection, more sidewall reflection, blurry spacious soundstage, etc. But I wouldn't, and yo certainly won't get much first class if you do. This is really a subject where there seems to be some confusion. The truth is that stereo is predicated on the first arrival dominating the photo. Reflections, later arrivals, just blur the imaging and don't really contribute genuine stereo information, although one might in some manner benefit from the resulting spaciousness. The Eros is one of the best imaging speakers around, however it is definitely the purist picture, direct arrivals emphasized. It doesn't generate space when a recording doesn't have any; it lets you hear the phasiness of spaced microphone sound once the microphones are spaced, etc. What can there be is the thing that you get.
Will, with one exception: Depending on the material, certain sounds can feel to come in the electrostatic panel itself a little more than really must happen. With images between your speakers and obviously, theoretically that's the location where the images ought to be this does not occur. But when one learns those spacey recordings that fling images away from speakers, the images can pop to the panels a little. It is difficult to blame the speaker for that exactly, since such recordings are problematical of course. But is likely to auditioning, you might like to listen for this in terms of whether the Eros with their theoretically almost perfect imaging present your favorite recordings you might say too different from what you are familiar with.