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Z Systems z-q2 Operation Manual

6-band digital equalizer

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Introduction
Z-Systems model z-q2 6-band digital equalizer is based on the highly-
successful model z-q1. For those who are familiar with the z-q1, here is a list of the
extensive improvements we've put into the z-q2:
•Complete ergonomic upgrade. The z-q2 is much easier and more fun to use.
The front panel has been simplified, keystroke and hand movement greatly
reduced, especially the process of saving and recalling memories. All screens are
now non-modal, which in plain English means that you can navigate instantly from
any menu to any other. The system remembers the last mode of any button that you
used. Left and Right channel equalization can now be separately and easily
adjusted and inspected. The one-line display has some added features keeping it
simple, yet powerful.
•POW-R
TM
dither. The reknowned dither from the POW-R consortium is now
included. POW-R dither is so transparent that it yields nearly 20-bit
psychoacoustic performance from a 16-bit master with virtually no penalty in tonal
balance, depth, space or width.
•MIDI control. Memory recall can now be recalled by an external MIDI
controller, and the entire state of the memories can be stored or recalled with
Sysex.
•M/S. A bit-transparent M/S encoder and/or decoder can be inserted in the
signal path.
•Range of gains has been optimized for very fine 0.1 dB equalization near 0
dB, and more coarse as the gains become extreme.
•Range of frequencies has been extended to 20 kHz for that ultimate "air
control".
•Range of Qs now includes a fine range around 1.0, to include the most
common and musically useful Qs.
•Power-Down state. The z-q2 writes its current state into memory whenever
power is lost.
•And all the original low-distortion Zelniker equalization algorithms are still
here!
z-q2 operations manual
z-q2 Operations Manual version 1.0 1/2301 Page 1

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Summary of Contents for Z Systems z-q2

  • Page 1 For those who are familiar with the z-q1, here is a list of the extensive improvements we’ve put into the z-q2: •Complete ergonomic upgrade. The z-q2 is much easier and more fun to use. The front panel has been simplified, keystroke and hand movement greatly reduced, especially the process of saving and recalling memories.
  • Page 2: System Menu

    Connect AC power of the proper voltage range with an IEC power cord to the back of the z-q2. If in doubt, verify the internal power selector switch has been set to the proper voltage for your country before plugging in power!
  • Page 3 For example, use 20 dith if the z-q2 is directly connected to a 20 bit ADAT. Use 16 dith or 16 pwr if the z-q2 is connected directly to a 16-bit storage medium such as DAT or CDR.
  • Page 4 The middle knob changes encode from no to yes, the right hand knob changes MS decode from no to yes. The optional MS encoder in the z-q2 is located in front of the gain, left and right channel adjustments and in front of the stereo equalizers.
  • Page 5 EQ than the sides. If you feed a stereo recording into the z-q2 and set the mode to MS Y, Y, the left channel gain control becomes the M gain (or center gain), and the right channel gain control becomes the S gain (or side gain).
  • Page 6 This is very useful when you have been doing a job and want to neutralize a bunch of memories. z-q2 Operations Manual version 1.0 1/2301 Page 6...
  • Page 7 L gain controls the M level, and the R gain controls the S level. Equalization The equalization in the z-q2 is performed with floating point arithmetic and uses proprietary low-distortion algorithms developed by Dr. Glenn Zelniker. There are six bands, including two first order (6 dB per octave) shelves and four parametrics (bell curves).
  • Page 8: Specifications

    • Input/Output: AES/EBU (transformer-isolated, 110-ohm terminated) • Input/Output precision: up to 24 bits • Gain control: from -95 dB to +12 dB • Gain resolution: 0.1 dB increments between 0 and 3 dB (gain or loss), 0.2 z-q2 Operations Manual version 1.0 1/2301 Page 8...
  • Page 9 For warranty service work, simply contact the manufacturer to arrange for return and repair. Z-Systems will not be liable for any consequential damages, including, without limitation, damages resulting from loss of use. z-q2 Operations Manual version 1.0 1/2301 Page 9...
  • Page 10 Z-Systems. We would like you to be one of them. Z-Systems Audio Engineering 4641-F N.W. 6th Street Gainesville, FL 32609 USA (352) 371-0990 (voice) or (352) 371-0093 (fax) email: z-sys@z-sys.com z-q2 Operations Manual version 1.0 1/2301 Page 10...