Archive for category Amplifier multiple Channel
Dirac Live room correction, added by the AM 17 module, is combined with a new calibration microphone and software available for either Windows or MacOS. The implementation is identical to other manufacturers such as Arcam, taking nine measurements to produce detailed EQ graphs.
Dirac then applies target curves using supercomputer wizardry to flatten the frequencies and tighten up the impulse responses. The result is an incredibly neutral performance, with individual sonic elements clearly defined, and the overall soundfield retaining a wonderful sense of balance and cohesion.
While Incredibles 2 didn’t have quite the spark that made the original movie so great, there’s no denying that the opening nine-minute sequence when The Underminer robs a bank in Metroville is a fantastic home theater demonstration. With the combined sounds of the Underminer’s tunneling machine and money vacuum, the Incredibles’ attempts to stop him, and a jazzy music background all going at once, this sequence can give any audio system a real workout. The Theater 7 maintained its composure throughout the clip, with dialogue remaining clear and fully resolved. Even without benefit of a subwoofer, the combination of the Krell amp and the Synchrony One tower speakers managed to get the walls shaking in my 14 x 16-foot theater room.
After taking into consideration “Krell watts” versus what you get with more typical power amps, 105 watts-per-channel can still be a limiting factor in some larger rooms, especially when inefficient speakers are used. Personally, I’m more of a quality over quantity kind of guy, and I’d always go for an amp like the Theater 7 over a lesser alternative with a higher power output specification. In my setup, I never felt like I was running short of juice. (Of course, if you want to have it all, Krell also offers the 7 x 200-watt Chorus 7200XD amplifier.)”
“Viewing the same scenes using the AVR850’s built-in amplification revealed the benefits of its Class G implementation, which is essentially a hybrid of Class A and Class AB. I felt the Arcam’s own power revealed improved transparency when compared to the IOTA, thus retaining a better sense of reality. Having said that, the AVXP1 gave an excellent account of itself and the greater efficiency of Class AB obviously makes it much more affordable.
The IOTA’s performance with the AVR850 is interesting because it raises the possibility of matching the amp with Arcam’s more affordable AVR390. This includes exactly the same processing, features, and Dirac Live room EQ as the more expensive AVR850, but lacks the Class G grunt. The addition of the IOTA would likely raise the performance of the AVR390 to new heights, resulting in a tasty combo for just over three grand.”
“Don’t let the absence of an Atmos soundtrack on Bladerunner 2049 put you off. Its DTS-HD MA 5.1 soundtrack has been masterfully crafted and sounds big, bold and detailed. Here the RMB-1585 produced the film’s dynamic passages with ease.
While the RMB-1585 did have a more effortless quality with the dynamics, the difference between my own Denon AVC-X8500H amps and Rotel’s RMB-1585 was less apparent. The RMB-1585 also sounded a little more ’forward’ than I am used too.
The same held true with Dunkirk’s excellent DTS-HD MA 5.1 soundtrack. The Rotel showing that it was both firmly in control and able to drive my 4 and 6-ohm speakers with ease”
While the Krell Theater 7 is not a traditional Class A amplifier because of its dynamic bias, the Krell Theater 7 sounds more like Class A than I’ve heard in most amplifiers. For those who seek the best quality in amplification for their home theaters, the Krell Theater 7 sets a new standard at this price point. We all like a good comeback story, and the Krell Theater 7 certainly is setting up a nice future for this lauded brand.”