Crane Song Ibis

4-band parametric equalizer with “color” control

IBIS is an analog equalizer that boldly takes equalization to a new level of musicality. Each of its four bands features switch-selectable frequencies centered on and covering musical-step intervals from 32-Hz “C” to 22.35-kHz “F.” Its four overlapping bands are labeled with note names and frequency allowing for the first time a “translation” between musician-speak and engineer-jargon. The bandwidth control has similar notation with adjustment from 0.2 octave to 4 octaves per band and a boost / cut range of 12 dB.

The low-cut filter is switch selectable from 20-Hz to 150-Hz with slopes of either 12-dB or 24-dB per octave. Like most Crane Song products, IBIS utilizes discrete class-A circuitry and features a truly unique and adjustable “color” function that can be applied to either the entire audio path or to any individual frequency band. A fully stepped mastering version is also available.

Specifications

• Input: Floating, balanced. Maximum input is +25 dBm. The connectors are XLR.
• Output: Floating, balanced. Maximum output is +25 dBm. The connectors are XLR.
• Input and Output Connections: Pin 2 is Sig + , Pin 3 is Sig- , Pin 1 is GND
• Power:
  100, 120, 230,240 volt; 50/60 Hz; 55 watts
  MDL .6A Fuse for 100V and 120V
  MDL .3A Fuse for 230V and 240V
• Noise: Measured with the eq set flat and the bandwidth controls at max -85dbm
• Clipping: +25 dbm
• Distortion: With the eq set flat measured at +20 dbm 0.001%
• Pilot Lamp: # 327
• Shipping Weight: 19 lbs. (8.6 kg)
• Depth Behind Panel: 12.5 inches (31.75 cm) plus cabling
• Panel Height: 2 rack spaces
• Frequencies: There are 24 frequencies per band for a total of 96 frequencies with the bands overlapping. They are stepped on both the mastering and standard units
• Boost-Cut: The standard equalizer has a range to plus or minus 12 db on each band. The Mastering version has a range of plus or minus 6 db This is stepped 0.5 db steps to 5 db and a 1 db step to 6db on the mastering version.
• Bandwidth: Bandwidth in octaves is measured at full boost. The maximum is 4 octaves and a minimum is 0.2 octaves. This is a Q range from 0.15 to 17 On the mastering unit this is stepped with 12 steps.