Join Date: Feb 2001
Location: Sunny Southern Cal
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 140 Post(s)
Reporting a (quick) sonic comparison between Crossover choices and roll-off rate when applied to the main speakers. I prefer to run my main LR Thiel towers full range, but some of these blockbusters such as Gravity, Super 8, and recently Serenity, are threatening to send my Thiel woofers into orbit :-), so I started to play around with crossover type and the roll off rate. Below are the 2 that I chose to compare, arbitrarily. I found the result interesting; keep in mind that this is for LR main speakers, NOT the surrounds.
1. Phase Perfect, low pass at 40 hz, 6 dB per octave roll off.
2. Linkwitz Riley, low pass at 40 hz, 24 dB per octave roll off.
My first attempt was Phase Perfect at 6 dB roll off. I immediately could hear that there is an additional warm/full character to the front soundstage when I AB switched between LR full range and LR crossover'ed with Phase Perfect 6 dB. It took a while for me to identify what was going on with the sound, but basically there is a subjective increase in mid and upper bass, that in turn decreases clarity and transparency of the front soundstage. The atmospheric "air" space around actor's voice (not in my head :-)) seems cut off.
Switching to Linkwitz Riley at 24 dB roll off, the muddiness of front soundstage and voice is much improved, to the point that it was hard for me to tell when AB switching between full range and crossover at 40 hz. I preferred this faster roll-off, by far!
Last edited by cannga; 10-06-2014 at 09:12 PM.