Weiss EQ1 MK2
The Weiss EQ1 MK2 is a two channel digital equalizer with seven parametric bands. It has digital inputs/outputs exclusively which work at up to 24 Bit/96 kHz. The EQ1-MK2 is the basic model within the EQ1 range with minimum phase type filters.
Weiss EQ1 MK2 Features
Basic EQ1 functions
The basic features are common to all four models, namely the seven identical parametric bands, i.e. all seven bands cover the entire audio frequency range. Each band has Boost/Cut, Frequency and Q/Slope knobs and operates in any of the following modes: High shelving, low shelving, peaking, high cut, low cut, bypass.
There are seven times three knobs in order to have “one knob per parameter” operation. The knobs are touch sensitive to switch the LCD to display the parameters of the touched band. The LCD shows the overall frequency response, the detailed parameter values and various status information.
Snapshots, MIDI, metering
Other basic features are an A/B compare memory, a 128 position snapshot bank with two additional banks for back-up (can also be dumped/recovered via MIDI), a peak meter with over indicators, MIDI control for each parameter, an overall bypass switch and an overall gain control, a channel ganging switch.
Signal processing, connectivity
The internal processing is done at 88.2 or 96 kHz in a 40 Bit floating-point format. A very low noise filter architecture optimized for audio is used. The digital input/output are in AES/EBU format on XLR connectors. The AES/EBU output can be POW-R dithered to 16, 20 or 24 Bits.
The EQ1 can be switched to M/S mode which is especially useful for the
dynamic model of the EQ1. Also see the article: “Stereo Shuffling: New Approach – Old Technique” by Michael Gerzon. Other specialties are variable slope shelving filters and very high Q (up to 650) peaking filters for notching out offending frequencies.
- Mains voltage: 115 V or 230 V with voltage selector
- Fuse rating: 500 mA slow blow
- Power consumption: 40 VA max.
- Depth: 30 cm
- Width: 43,3 cm (19")
- Height: 8,8 cm (2HU)
- Sampling frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
- Maximum input word-length: 24 Bits
- Channel Status Data: Input accepts professional or consumer format
- Channel Status Data Bits forwarded to AES/EBU output: see table below
- Connector: XLR female
- Sampling frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz (always the same as the input)
- Output word-length: 24 Bits
- Connector: XLR male
AES/EBU Channel Status Data
- The EQ1 allows to convert the incoming Channel Status Data as follows:
- From Consumer to Professional
- From Professional to Consumer
- Transparent mode, i.e. Channel Status Data is fed forward to the output without any conversion (one exception, see below)
- Dithering algorithms are implemented using the POW-R set of algorithms, i.e. POW-R #1, POW-R #2, POW-R #3
MIDI Remote Control Protocol
- All band parameters plus the controls parameters are remote controllable. Each parameter has its corresponding MIDI controller number. According to the different parameters, the controllers are limited in their range. Invalid values are replaced by the maximum allowable values. Details can be found in the EQ1 manuals.
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