Archive for category Amplifier multiple Channel
“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.”
While the AV8802A and AV8805 look similar, the AV8805 has over 1,900 part changes that are meant to enhance audio quality. These include faster DSPs, new isolation plates between the transformer and chassis to reduce noise and vibration, additional shielding and isolation between the DSPs and the audio PCBs, a new DAC board layout with a shorter signal path for improved jitter reduction, and updated HDAMs (Hyper Dynamic Amplifier Module) with precision-matched discrete devices.
One thing Marantz hasn’t updated is its best-in-class user interface, one that I find to be extremely intuitive and easy on the eyes. When powering up for the first time, you are greeted by a guided setup that walks you through the installation. First, you tell the processor how many components you’re using. Next, you’re instructed to connect the included Audyssey microphone to the unit’s front so that MultiEQ XT32 equalization can work its magic
“My complaints are less than minor. Stereo subs would be nice though from my perspective, I don’t have a large enough room to benefit from them. And the remote, though extremely competent and beautifully made, would benefit from a little machining to remove those sharp corners.
These are not things that would give me even a moment’s pause. The M17 V2 is not inexpensive but I think it’s worth every penny. Had I the funds, it would not leave my theater. It is truly a reference-level product and with support for HDMI 2.0 and Dirac Live room correction, it appears ready for the future. It requires an investment of both money and time, but I promise you, the results are worth it. It doesn’t just deliver great sound, it provides a great experience. The NAD M17 V2 Surround Sound Preamp Processor receives my highest recommendation.”
The next figure focuses on the subwoofers alone, before and after correction. The 4 subwoofers have relative gains and delays adjusted to reduce seat-to-seat variation. The idea is: make the bass similar at every seat, so room correction on top will improve bass quality at every seat. Otherwise, room correction will improve some seats but degrade others. These measurements are unsmoothed to expose every narrow peak and null. Unsmoothed bass measurements are rarely shared: nobody wants to admit how bad their in-room bass response is!”