Here's my quick / dirty advice:
- Cross the speakers high (80Hz) not low (40Hz)
- EQ for a descending slope from 20 Hz to 80 Hz. Between 1.25 and 1.5 dB/decibel.
- Clip peaks before setting subwoofer level.
No love for Tannoy Definition subs
I bought the big (& beautiful) Tannoy Definition dual-firing sub when they discontinued and went on closeout pricing. Because it has two active drivers firing in opposite directions, I figured this was this was designed as equivalent to two subs -- very useful for me as sub placement is a major limitation in my listening room.
Okay, I'm not dissatisfied, but this product is never discussed or even mentioned so far as I can tell. Does everyone just "know" it's junk and unworthy of mention? And is there any validity to my supposition that this should equal two subs (albeit both drivers are powered by the same 1k class D amp)? Really doesn't seem so, although comparison with two RELs is not really a feasible experiment for me. (Also, black boxes look ugly in my room).
Showing 2 responses by erik_squires
Hey, so lets get into the physics a little. The surface area of 1 12" driver = 116" squared The surface area of two 12" subs = 232" squared A single 18" sub = 255" squared So you have a box with a surface area between a single 15" and single 18" driver. That’s good. Because the drivers are co-located you don’t get the frequency response smoothing capabilities of multiple subwoofers. Ideally you could locate them so they smooth each other's peaks and valleys. So that’s not quite as good, but a single sub, with EQ and room treatment can be magical if properly done. To integrate this well, start by using the room simulator here. https://amcoustics.com/tools/amroc Try to put the sub and listening location OUTSIDE the first few room modes. Measurements are really going to be your friend. The next two tools are EQ and room treatments. |