Recent content by witwald

I was simply referring to the curve between 20Hz and 200Hz in isolation. To further explain, at 20Hz it is at 82.5dB, at 70Hz it is at 83dB and at 200Hz it is at 82.5dB. That makes it 82.75dB ±0.25dB between 20Hz and 200Hz. That seems flat to within ±0.25dB. I can only agree with your...

I'm not sure what is meant by the above. The following two quotes are taken from some of Toole's writings: QUOTE 1: "Almost 50 years of double-blind listening tests have shown persuasively that listeners like loudspeakers with flat, smooth, anechoic on-axis and listening-window frequency...

The emphasis with the Dirac DSP is the ability to try things out, much like using the simple tone controls that are present on many amplifiers. This is all part of the Dirac approach, which was presented in an AXPONA 2019 presentation, Ins and Outs of Room Correction with Dirac, by Jakob Ågren...

When you refer to a "flat" frequency response, are you referring to a flat on-axis loudspeaker anechoic frequency response or a flat in-room frequency response as measured at the listening position? Isn't a flat on-axis anechoic frequency response a desirable characteristic of a loudspeaker? If...

From this evidence, it would strongly appear that applying DSP room correction above the Schroeder frequency of the room is quite a futile pursuit, irrespective of the marketing stance associated with any given product. It's a technology that is being incessantly tweaked and upgraded, but in its...

And the Marantz MODEL 30 is rated at 100W + 100W (8Ω) and 200W + 200W (4Ω), THD 0.005% (1kHz, 8Ω), and Damping Factor of 500. Those results seem typical of Class D amplifiers.

The Marantz 40n seems to only have a low-pass filter option on the subwoofer output. Don't most subwoofers have an onboard low-pass filter, so this is somewhat superfluous. What is needed, but seems to be missing here, is high-pass filtering on the stereo outputs to allow better blending with...

Hello deercreekaudio. Having that very broad non-complementary overlap region between 20 Hz and 60 Hz seems to be quite counterproductive when it comes to high-quality sound reproduction. It's not as good a use of the main speakers and subwoofers as would be possible if they were more...

Not to mention having the facility for much more linear output SPLs at low frequencies. I'm not sure that a high-pass of the main speakers at 120 Hz is desirable. Wouldn't that result in localization of the subwoofers to some degree? I'd suggest that the highest high-pass frequency should not...

That's probably a good spot, as it will be offset a bit from the centre of the wall where a low-frequency null will appear. That's clearly going to come into play when trying to maximize the benefits of the subwoofer in a system. Assuming that the above plots show the nominal filtered...

Maybe NAD could provide an option where MQA is deleted and Dirac Live is added at the same price point? The C700 also only provides a single subwoofer out. Not having the ability to provide two independent subwoofer outputs seems like a major omission. Eye-catching design elements aside, a lack...

Dr. Mathias Johansson states that modern pop music has a frequency spectrum that resembles "white" noise? Is that accurate, as it seems to be a little bit off the mark.

Hi @Todd Anderson. I can see why you had a concern that this relatively low-powered amplifier might have some trouble driving the SVS Ultra Towers. I've noticed the SVS Prime Towers have a very low minimum impedance of about 2.75 ohms, which makes their nominal 8-ohm rating a little on the high...

Hi @Todd Anderson. Thanks for responding. I realise that Dirac Live Full has the ability to equalise the in-room response of a loudspeaker curve in the the listening area. However, it works on both the direct sound from the loudspeaker as well as the reflected sound from room surfaces. What I...

How are loudspeakers "designed and optimized" for ‘single-ended triode’ amps? Do they sacrifice any semblance of frequency response linearity for high efficiency? If so, what is the attraction of having a transducer whose response is nonlinear? Isn't that just distortion?