Technical Specifications
ToolMod TM222
Stereo Mastering Compressor
Format ToolMod Module Size 4U
Versions TM222-h - horizontal Face Plate
TM222-v - vertical Face Plate
Power Supply Tool-Series Standard
Supply Voltages +/- 25 V and + 48 V Phantom
Supply Current *) +/- 160 mA
Input electronically balanced, Stereo
nominal Level + 6 dBu - Gain
maximum Level > + 30 dBu - Gain
Input Impedance 40 Hz - 15 kHz > 10 kOhms
nominal Source Impedance 50 Ohms
CMRR 15 kHz > 65 dB, typical 75 dB 1 kHz > 80 dB, 40 Hz > 90 dB
Output electronically balanced, Stereo
nominal Level + 6 dBu
maximum Level > + 30 dBu
Source Impedance 50 Ohms, see Diagram
Output Source Resistance vs Frequency
Load Resistor see Diagram
maximum Output Level vs Load Resistor
maximum Output Level vs capacitive Load
CMRR according to IEC > 40 dB, see Diagram Output CMRR vs Frequency
Gain  0 dB +/- 0.3 dB no Regulation, Fill Off
Gain @ 0 dB
Control Range > +/- 20 dB
the Gain Control determines the output level post compressor
Frequency Response
20 Hz - 50 kHz +/- 0.2 dB no Regulation
- see Diagram Frequency Response
Bandwidth < 10 Hz to > 150 kHz
Phase Response 20 Hz-20 kHz < +6/-10° linear setting
- see Diagram Phase Response
THD < + 28 dBu, 40 Hz ... 20 kHz, < 0.1 %,
maximum THD at + 30 dBu <1 %
no Regulation
THD under regulation is determined by the frequency, attack and release settings, and the gain reduction
Crosstalk > 65 dB, 40 Hz ... 15 kHz
Dynamic Range / Noise
RMS 22Hz-22kHz <= -91 dBu no Regulation at 0 dB Gain
total Dynamic Range referring to the RMS Value 22Hz-22kHz
>= 121 dB no Regulation at 0 dB Gain
Control Voltage FeedThru > 70 dB
Threshold Control Range + 18 dB to - 24 dB, referring to + 6 dBu
0 dB Setting internally calibrated
Ratio Compression Ratio
Control Range from 1 : 1 - (Compressor off) to
1 : 20, Quasi Limiter Operation
Crest affects the behaviour of the AC/DC converter
6 position stepper Switch
1 / Peak - Peak Mode with short Integration Time
6 / RMS - RMS Mode with long Integration Time
2 to 5 / M - Mean Value with medium Integration Time
Attack Attack Time Adjustment for 10 dB Attenuation
Control Range 0.05 ms to 30 ms
(with short attack time settings, the real attack time is depending on the period of the input signal, and the crest setting)
Release Release Time Adjustment for 10 dB Gain Change
Control Range 50 ms to 3 s
Knee Determines the transition from the unregulated level range below threshold to the regulated range above threshold. A setting of 0 dB causes a hard transition. The scale value of any different setting determines the dB range of the transition.
- see Diagram Soft Knee
Envelope The Envelope Control improves the low frequency THD behaviour with short release time settings. The control determines the sphere of action from 0 (off) to 120 Hz.
Fill Mixes the uncompressed input signal to the compressed output signal. This function can cover unwanted side effects of hard compressor settings.
LT-Int Longtime integration overlay with 0.3 sec attacktime and adjustable release time. Adds an additional time constant to the control.
Autogain Analog computation circuitry to correct the loss of gain, depending on the settings of threshold, ratio and attack. Operates with threshold settings below 0 dB. Autogain can be disabled.
Side Chain Insert Electronically balanced insert point with identical specifications as the audio inputs and outputs. Allows to include external processing gear to alter the behaviour of the regulation.
Activated by switch.
Output to Side Chain Control function for the side chain insert;
switches the side chain insert input to the output to allow easy adjustment of external gear.
Display Gain reduction display with 10 LED's,
display range from 1 dB to 25 dB
Bypass Circuitry Hardbypass by Relay
*) The standard supply current is the supply current under realitic operation conditions. If the outputs are loaded with the minium load resistors and the level is at + 30 dBu, the supply current increases by 30 mA per output. The standard supply current shuold be used to calculate the necessary power supply capacity of a system.