David A. Rich, Ph.D.

EQ for Analog Inputs

EQ for Analog Inputs

David A. Rich, Ph.D.

Question: I like using the automated EQ setup on my receivers. I also enjoy using the multi-channel audio outputs on my blu-ray player to take advantage of its DAC. But I’ve never found a receiver where the EQ will work with analog inputs. Why is that? - John K Portland, Oregon

SECRETS Home Theater Q&A

Anthem Room Correction (ARC) System – Part 2 – Including a Subwoofer

David A. Rich, Ph.D.

In Part 1 of this series, we discussed the Anthem ARC (Anthem Room Correction) firmware that is present in their SSPs as well as the AVRs which have a  reduced filter bank size. By far, the most significant sonic issue for acoustic music when a subwoofer is deployed occurs around the crossover from the subwoofer to the main speaker. In Part 2 of this series, we take a look at Anthem's ARC (Anthem Room Correction) when adding a subwoofer to the system.

Technical Reviews

The New York Hi Fi Show: A 63-year History that Traces a Complicated Trajectory

David A. Rich, Ph.D.

For the past six weeks since attending the New York Hi Fi show, I have taken time to reflect how the show has evolved to its current form. I will report on a couple of items at the show, but the real coverage was by Mark Vignola. I have no idea how he could produce so many professional quality pictures and the accompanying annotation one day later

Show Reports, Film Festivals and Concerts

Anthem Room Correction (ARC) System – Part 2 – Including a Subwoofer

David A. Rich, Ph.D.

In Part 1 of this series, we discussed the Anthem ARC (Anthem Room Correction) firmware that is present in their SSPs as well as the AVRs which have a  reduced filter bank size. By far, the most significant sonic issue for acoustic music when a subwoofer is deployed occurs around the crossover from the subwoofer to the main speaker. In Part 2 of this series, we take a look at Anthem's ARC (Anthem Room Correction) when adding a subwoofer to the system.

Audio Calibration

NHT B-10d Subwoofer

David A. Rich, Ph.D.

The world is saturated with subwoofers, many of which have a peak in frequency response to enhance movie sound tracks at the detriment of music. Tuned to have a bandpass response, the movie-inclined subwoofers limit the low frequency extension at usable SPLs. The frequency peak may persist, even if a first-class electronic room EQ is in the loop, especially if the room is sized and the subwoofer is positioned so a modal resonance peak occurs near this frequency. Here, we review the NHT B-10d, which has a 10" woofer and 300 watts of BASH amplification.

Subwoofers