Outlaw Audio LFM-1EX

The Outlaw subwoofer had exceptionally uniform maximum output capability — within about 1 dB from 32 to 62 Hz — and could also deliver a true 20 Hz. It could almost reach 16 Hz at 89 dB SPL, if not for audible intrusion of its protection circuit. There were out-of-band artifacts at 250 and 400 Hz when the crossover was bypassed. The crossover-control markings were off considerably, but the LFM-1EX we tested was a prototype, and prototypes are often quirky; production units may be better in this regard.

In the lab

Frequency response (at 0.5 meter)
Bypass: 26 to 160 Hz ±3.8 dB
Max Output: 34 to 103 Hz ±2.2 dB
Bass Extension: 34 to 103 Hz ±2.2 dB

Bass limits, Bass Extension mode (lowest frequency and maximum SPL with limit of 10% distortion at 2 meters in a large room)

Average maximum output, 25 to 62 Hz: 106 dB SPL
Maximum output: 109 dB SPL at 32 Hz
Bass limit: 20 Hz at 96 dB SPL

Crossover

Low-pass slope: 18 dB per octave

(Note: Reducing the crossover frequency also extended measured low-frequency slightly, by as much as 6 Hz at the lowest setting.)