Grimm Audio LS1, User Manual, Page: 13 / 62

LS1s - Subwoofer
So what can you do, if you really want that drumsolo on the live-recording of your
favourite jazz-trio to sound like you´re sitting in front of the stage? Or if you love that
highly dynamic Mahler symphony and your room and neighbours allow for a sound
pressure level that resembles a concert-like experience even on the tutti-parts?
We can´t avoid the laws of physics, so in order to achieve the same degree of linearity in
frequency, time and phase response we need more power and more membrane surface.
This is why we offer an optional active subwoofer pair to extend both speakers´ low
frequency response.
The LS1s comes in a remarkable small cabinet for a subwoofer. We could do this because
our DSP system corrects the original response of the box. Please don‘t judge the power
of this sub on its size: the selected high performance driver from Peerless has a very long
linear excursion, which moves an equal amount of air like a large surface woofer.
The LS1´s have a dedicated subwoofer output, which can be controlled from within the
remote software. While it is possible to connect any subwoofer to this output, the optional
„LS1s“ low frequency extension provides a different degree of integration. With the LS1s
added, the LS1 effectively becomes a 3-way speaker system.
Switching to the „Grimm Sub“ setting in the preferences recalls a completely different
crossover, time and phase correction preset in the DSP, so the system is a perfectly
matched 3-way speaker and not only a 2-way with an added subwoofer. It completely
retains its phase and time coherence as well as a linearized frequency response. The
woofer now becomes a mid only unit that is crossed over to the subwoofer at ca. 70Hz.
The result is that the LS1 sounds nearly identical, both as a 2-way or a 3-way system.
The only difference is the higher possible sound pressure level and a low frequency
extension down to 20 Hz.
page 13
LS1s - Subwoofer