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Subwoofer Amplifier: Delivering up to 250 watts into 4 ohms, the
Monitor Audio IWA-250 power amplifier will power a single or dual IWS-10 in-wall
passive subwoofers (893IWS10,
sold separately) to provide higher power levels for larger rooms or to meet
Class D Design w/ DSP: The amplifier utilizes a cool
running Class D power stage driven by a PWM supply with integrated DSP.
Filtering and functionality are controlled in the software for precise and
Sub Controls: The Monitor Audio IWA-250 power amplifier
offers the following sub control to tailor the system to your content, room,
application, and preference.
- Volume Control: This control allows the level or volume to be
adjusted in order to achieve a balanced overall sound between the subwoofer
amplifier system and your AV system.
- Lowpass Crossover: The variable lowpass control (50-120Hz) only
operates when using the RCA stereo inputs and is used to set the low pass
frequency of the amplifier. The crossover control should be set in
accordance with the size or bass output of your front speakers.
- Phase Control: The Phase Control (0/180-degrees) is used to
synchronize any delay between the subwoofer amplifier system and your main
front speakers. When the subwoofer is in phase with your main speakers the
sound should be full bodied.
- EQ Switch: This switch tailors the bass response of the subwoofer
amplifier system to your taste. There are three settings - Music, Movies and
Impact. Movie mode provides a relatively flat response down to 35Hz. Music
mode is -2dB down from Movie mode but goes lower, all the way down to 30Hz.
Impact mode is +3dB up from Movie mode and comfortably goes down to 40Hz.
- Enclosure Switch: There is also an enclosure
switch to calibrate the drive characteristics when your IWS-10 passive subwoofer
is used within or without the IWB-10 back box (sold separately).
Balanced & Unbalanced Inputs: The IWA-250 offers a choice of
LFE (unbalanced RCA/balanced XLR) or stereo RCA inputs to connect the subwoofer amplifier to
your AV receiver.
Spring-Post Speaker Terminals: The Monitor Audio IWA-250 is
fitted with two pair of spring-post terminals to connect up to two IWS-10
passive subwoofers (sold separately). The spring-post terminals will accept bare
wire (up to 10AWG), banana plugs (dual or single), and angled pin-connectors.
Rack Mountable: Its slim design can fit in a1U rack-mount space. The
front-panel allows access to all control features for easy adjustment when
fitted into a rack bay.
Auto Power On/Off: The IWA-250 can be configured to switch on
automatically using input signal sensing, or by using its 12V trigger (3.5mm) link from
an AV receiver. The IWA-250 will then automatically be switched on and off with
your AV system.