EQ1-LP, the EQ1-MK2 7 Band Equalizer with linear phase
response
The EQ1 is available in four different configurations.
All of them work at 24/96. The basic model is the EQ1-MK2 which is offered here,
the linear phase model is the EQ1-LP, the dynamic model the EQ1-DYN. The
EQ1-DYN-LP incorporates both LP and DYN versions in one unit. The mode of
operation (LP or DYN) can be chosen after power-up. All models are
user-upgradeable to any other version. The EQ1-LP has the same parameter set as
the EQ1-MK2 and is therefore fully snapshot and MIDI control compatible.
Sampling frequencies supported are 44.1, 48, 88.2 and
96kHz.
The EQ1-LP
The impressive list of features of the EQ1-MK2 is in the EQ1-LP further
extended with a linear phase response. This means that the delay introduced by
processing is now constant across the whole spectrum, unconstrained by eq
settings - this is not the case with standard equalizers, where signal delay
varies with frequency, with the length of the delay depending on the amplitude
response.
The sound, or character, of an equalizer has been said to be influenced by
phase response (for example John Watkinson: ...much of the audible difference
between EQs comes down to the phase response., Studio Sound 9.97). The EQ1-LP is
therefore the ideal tool for corrective amplitude adjustment, without the
unwanted phase distortion added by standard equalizers.
The linear phase feature can be turned off, resulting in the exact same sound
as the EQ1-MK2. So for creative sound designing, there is the benefit of two
different equalizers in one machine.
Here are the main
features common to all four models:
- Seven identical parametric bands. All seven bands cover the entire audio
frequency range. Each band has Boost/Cut, Frequency and Q/Slope knobs. Each
band operates in any of the following modes: High shelving, low shelving,
peaking, high cut, low cut, bypass.
- One parameter per knob operation. Seven sets of controls for seven
operating bands. Knobs are touch sensitive. LCD display shows detailed
parameters of the touched band.
- Large, backlit Liquid Crystal Display which shows the overall frequency
response (calculated in real time) and the detailed parameter values in dB, Hz
and Q.
- A/B compare memory, 128 snapshot bank with two additional banks for
back-up.
- Digital input / output in AES/EBU format on XLR connectors.
- Dithering to 16, 20 or 24 bits. POW-R dithering in the LP, DYN and DYN-LP
models.
- 128 steps for boost/cut, frequency and Q parameters.
- Variable slope shelving filters.
- Very high Q (up to 650) for notching out offending frequencies.
- M/S mode for independent equalization of M and S channels. M/S encoder /
decoder can be configured separately.
- Peak meter, over indicators.
- MIDI control for each parameter.
- Bypass, overall gain, CH1/2 independent or ganged.
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