User Eq Options - PMC twotwo.5 User Manual

User EQ Options

PMC's twotwo series active monitors feature DSP-based user-equalisation options. These comprise
separate low frequency (LF) and high frequency (HF) shelving responses, plus low frequency
slope options. The HF and LF shelving equalisers are
each adjustable over a range of ±4dB in increments
of 0.125dB. The HF shelving frequency is 1kHz for
both the twotwo.5, twotwo.6 and twotwo.8 models,
and adjustment of the HF level can be useful in
counteracting the effects of the room's acoustics
and local reflections.
twotwo.5 - 750Hz
twotwo.6 - 500Hz
twotwo.8 - 500Hz
The ability to adjust the low frequency level and roll off enables compensation for the effects of
room boundaries, since if a monitor is placed close to a wall or corner the perceived quantity of
low frequency energy will increase, often quite dramatically and with a detrimental effect on the
overall accuracy of audio reproduction.
The LF slope adjustment provides a 6dB/octave high-pass
filter to further assist in compensating for placement close to
room boundaries.
Please see page16 for further information on optimising the
positioning of twotwo series monitors.
The LF shelving is different for each model
because of their differently sized cabinets.
For the twotwo.5 model the bass shelving
frequency is 750Hz, while it is 500Hz for the
larger twotwo.6 and twotwo.8 models.