Some of the many questions that can be found scattered across the internet and overheard in conversations amongst audiophiles today relate to room acoustic measurements: What are the key measurements? How do I interpret them? What does good look like? How do they relate to each other? These questions arise from the recent availability of […]
Subwoofer setup and integration 101: sub crossover frequency, slope and phase for two channel systems
In this educational article we describe how to properly do a subwoofer setup and integrate it into a stereo or two channel system using the XTZ Room Analyzer II Standard package. Two channel vs. home theater crossover considerations There are a number of factors which make sub integration more involved in a stereo system than in […]
Who are JL Audio? JL Audio made their name in the car audio business. Unlike some other subwoofer manufacturers they make all the components that go into their subwoofers, including the W7 driver, enclosure and amplifier, in house in Miramar, Florida, USA. In 2007 they released the Fathom and Gotham subwoofers for home use. The […]
Studio Six Digital, makers of the AudioTools acoustic measurement software for Apple iOS, have created a free acoustic measurement app for JL Audio called, rather creatively, “JL Audio Tools”. In this blog post I’m going to walk you through the main features of the app. Once you’ve downloaded the app and launched it the first screen you see is the menu screen. The JL Audio Tools app does not have all the features of the paid-for Studio Six Digital Audio Tools app but does have many of them. The JL Audio app offers a Sound Pressure Level (SPL) meter, a Real Time Analyzer (RTA), a speaker polarity test and some handy audio calculators.
This article continues the theme of the last two blog postings in whic we outlined some ways in which subwoofers can be used to improve sound quality. Last week’s installment ‘Using Subwoofers to Improve Sound Quality: Part 2 Room Modes‘ outlined a technique whereby two subwoofers are positioned within a room to destructively drive a particular room mode, nullifying its frequency response peak and time domain ringing. This week we introduce the Welti / Devantier and Geddes multi-sub methodologies. Both involve using multiple subwoofers as a way to smooth bass response and reduce the impact of modal resonances.