Crane Song IBIS User Manual

OPERATOR'S MANUAL

Version 1

20090110

LTD.

2117 East 5th Street

Superior, WI 54880 USA

tel: [phone]

fax: [phone]

www.cranesong.com

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions

2. Keep these instructions

3. Heed all warnings

4. Follow all instructions

5. Do not use this apparatus near water

6. Clean only with dry cloth

7. Install in accordance with the manufacturer's instructions

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce heat

9. Protect the power cord from being walked on or pinched particularly at plugs and the
point where they exit from the apparatus

10. Only use attachments/accessories specified by the manufacturer

11. Unplug this apparatus during lightning storms or when unused for long periods of time

12. Refer all servicing to qualified service personnel. Servicing is required when the appara­tus has been damaged in any way, such as power-supply cord or plug is damaged, liquid
has been spilled or objects have fallen into the apparatus, the apparatus has been exposed
to rain or moisture, does not operate normally, or has been dropped

13. CAUTION: To disconnect the unit completely from the MAINS, unplug the unit. Turning
the power switch off does not disconnect the unit completely from the MAINS.

THE BASICS

The IBIS equalizer can do some very different things.

First, each band has 24 frequencies. 12 switch positions and a “+ one step button” this
button moves the frequencies up one whole musical step. The high and low bands also
can be shelving by pushing the shelving button.

The frequency chart showes how each of the bands over lap and how frequencies and
musical notes relate. As an example, with the +1 step button pushed in, the frequency
moves up two positions on the chart. 32.7 Hz which is the lowest frequency will become

36.7 Hz

There is a dead zone of about plus and minus .3 db on the “boost / cut” controls where the
EQ is flat in response. This allows an easy way to set your bands flat. The range is plus
or minus 12 db and is not stepped. The mastering version has a range of 6 db in .5 db
steps with a 1 db step between 5 and 6.

The Bandwidth is not stepped on the standard version and is steped on the mastering
version. the range is from 0.2 Oct to 4 Oct this is at 12 db of boost

The low cut is 12 db per octave, but the steep button increases the slope to 24 db per
octave.

The filters are of a special type that provide a very clean and smooth sound. To add
flexibility to the equalizer a color knob is inculuded.

The color knob is an additive second / third harmonic distortion type of process,
it can be applied to the full program or any one of the 4 bands. When doing a “cut” it will
subtract the harmonic content. The Color Knob is not stepped on the standard version
and is stepped on the mastering version

The use of the color function will allow you to change the equalizer from a very transparent
sound to a colored sound. Using it on the low frequencies, band 1, it will add warmth. On
band 3 it will add presence and some nice upper midrange detail. On the high frequency
band it will add air.

61.7

58.3

55

123.5

116.6

110

247

233

220

494

466

440

988

932

880

1976

1865

1760

3951

3729

3520

7902

7459

7040

15804

14917

14080

IBIS FREQUENCY CHART

51.9

49

46.2

43.7

41.2

38.9

104

98

92.5

87.3

82.4

77.8

208

196

185

175

165

155.6

415

392

370

349

330

311

830

784

740

698

659

622

1661

1568

1480

1397

1319

1245

3322

3136

2960

2794

2637

2489

6645

6272

5920

5588

5274

4978

13289

12544

11839

11175

10548

9956

21096

19912

73.4

69.3

65.4

147

139

131

36.7

C# D D# E F F# G G# A A# B

34.6

C

32.7

294

277

262

587

554

523

1175

1109

1047

2349

2218

2093

4699

4435

4186

9397

8869

8372

18794

17740

16744

Band 1 + 1 step lowest frequency is 36.7 Hz

Band 2 + 1 step lowest frequency is 155 Hz

Band 3 + 1 step lowest frequency is 523 Hz

Band 4 + 1 step lowest frequency is 1760 Hz

BAND 1 EQ CURVES

This graph showes band 1 the low frequency band, The peaking curve is at a bandwidth

1.5 octaves and is for reference. The shelving curves are with the shelf button pushed in.
Only one frequency is showen for clarity

BAND 4 EQ CURVES

This graph showes band 4 the high frequency band, The peaking curve is at a bandwidth

1.5 octaves for reference. The shelving curves are with the shelf button pushed in. Only
one frequency is showen for clarity

BAND EQ CURVES PEAKING

This graph showes a typical peaking eq curve. This was measured on band 3.
Only one frequency is showen for clarity. There are several boost and cut levels at differ­ent bandwidths. These curves apply to all 4 bands for a total of 96 different frequencies.

LOW CUT EQ CURVES

This graph showes a typical low cut curve. Three frequencies are showen for clarity. Each
showing the 12 db pre octave slope and the 24 db per octave slope. Frequencies of 40 ,
80, and 150 Hz are showen.

LOW CUT EQ CURVES

This graph showes the range of the low cut curves. All frequencies are at the 24 db per
octave slope.

IBIS INSERT CONNECTOR

If you are going to use this, use it with caution. The inserts are a loop and must be normaled
for the band to work correctly. If there is a phase inversion in the inserted device it is possible
that the system will be an oscillator. This will not hurt Ibis, but your Speakers.

IBIS INPUT

There are 4 filter circuits in parallel in Ibis. When using the insert with a compressor you are
modifing the filter output before is sums back into the audio path. The inserts are unbalanced

boost / cut amp

Insert

filter

Return
Send

IBIS OUTPUT

INTERFACING - 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 : Pin 2 is Sig + , Pin 3 is Sig- , Pin 1 is GND
Connections

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 bandwith 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 frequenices

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.

Bandwith: Bandwidth in octaves is measured at full boost. The maximun is 4

octaves and a minimun is 0.2 octaves. This is a Q range from 0.15 to
17 On the mastering unit this is stepped with 12 steps.