Specifications

monitoraudio.com 3

Initial Set Up

The optimal control settings will depend entirely on your system conﬁguration, room environment

and personal tastes. However, for initial trials set the controls as follows:

Volume Control Should be set to approximately 10 o’clock.

Frequency Control Should be set to the approximate frequency depending on

main speakers when using the L & R Line Level Inputs.

EQ Should be set to Movies when connecting to an AV receiver

or Music when connecting to a stereo ampliﬁer.

Cabinet Should be set depending on whether or not you are using the

Monitor Audio back box or not.

Phase Control Should be set to zero degrees.

Mode Switch Should be set to ‘on’.

12v Trigger (optional) Do not connect at this stage.

Input Connections from the ampliﬁer can be made at this stage

before the power is connected to the subwoofer. Refer to

items 2, 3 & 4 on page 4.

Never connect or disconnect the RCA input/ output leads with the ampliﬁer switched on.

Set Up

Once the input cables are connected and the controls are set in accordance with the initial set-up

procedure above, the ampliﬁer can be connected to the mains power supply and switched on at

the mains power switch.

Do not play any music or movies at this stage as the auto set up of the AV amp (if using one) will

need to be run. If your amp has an auto set up procedure, run this now ensuring the IWA-250 is

turned on. If you do not have an auto set up or are using a stereo amp connected to the left and

right inputs, set the crossover in accordance with your main speakers.

When the auto set up is complete, check that the subwoofer settings on the AV amp are correct.

The crossover frequency should be roughly 80Hz (although this may vary depending on the other

speakers within the system) and the level should be no more/ less than +/- 3dB. If not we would

suggest adjusting accordingly.

Now play a variety of music/ ﬁlm excerpts that you are familiar with and adjust the level of the

ampliﬁer to a point where it integrates with the rest of the system and to where you are happy. The

volume of the amp can then be adjusted to an average listening level once you are sure everything

is working correctly to double check your sub woofer level settings.

Experiment with the EQ switch as well to get the perfect sound for your environment and tastes.

ENGLISH