LS1be Studio Monitors Manual

page 46

page 47

Software Control Settings

One tab to the right you will nd the Woofers page. Dependent on the selection of a 2-way or

3-way loudspeaker on the ’LS1‘ page, you will nd either the 2-way settings or the 3-way settings

active.

2-way woofer settings - The only parameter here is ’Low-cut frequency‘. The LS1 can be

completely linear down to 25Hz, even as a two-way system without the subwoofers. Choosing a

low cutoff frequency will however limit the maximum playback level. In practice 35Hz to 40Hz is

a good compromise between a low enough bass and a loud enough playback level.

3-way woofer settings - Here you can control some parameters of a connected subwoofer. First

you can set the gain. If you use the Grimm LS1s subs, the system is linear in the free eld (on-

axis) with a 0 dB setting. Dependent on your acoustics you may like to use a slightly lower or

higher value. Since the crossover frequency is 70 Hz, the gain control acts like a low-shelf EQ

below this frequency. In case you have installed a double amount of in total four subwoofers

along the walls of your room to cancel room modes and improve the bass response, you will need

to select a value around -6 dB. When using a 3rd party subwoofer, please set the gain for the

audibly or measurably most linear level. The preferred method is to rst set the software gain to

0 dB and align the subs own gain control (if available) until switching between 2-way and 3-way

shows just a marginal difference in sound color. You may then ne tune the subwoofer level with

the software gain.

The next parameter is delay. Use this to compensate for an offset between the acoustic origin of

the subwoofer and the main system. This can be caused by room acoustics (for instance by large

obstacles like a mixing console), or when you have placed the subwoofers against a wall in stead

of on the LS1 footplate. The display shows the compensation delay in ms, cm and feet. To nd

the optimum setting, switch between ’2-way‘ and ’3-way‘ and experiment with the delay setting

until the ’3-way‘ selection offers at least the same amount of ’punch‘ as the ’2-way‘ setting.

The third parameter is low cut. This controls the deepest corner frequency of the subwoofer and

therefore of the whole system. Normally it is set at 20 Hz, but it may be helpful to set it higher in

case there‘s a room mode resonance to tame. A higher frequency also yields a slight increase in

possible playback level.

If you like to connect a non-Grimm Audio subwoofer to your system there are two extra settings.

To activate them you need to tick the ’enable‘ button.

-> Never use the non-Grimm subwoofer option with a Grimm Audio LS1s subwoofer. The frequency response

of the LS1s is linearized in the LS1 DSP and the woofer / sub-woofer crossover is phase compensated. Both

functions are de-activated in the non-Grimm subwoofer mode.