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TOA Electronics TDX2 user manual Table of automatic attack and release times, Output Limiters

Models: TDX2

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7.6. Output Limiters

High performance digital limiters are provided for each output with control over attack time, release time and threshold level parameters (see Section 8.2, page 22). This level of control allows the user to balance the required subjective quality of the limiter against the driver protection requirements. It also means that an incorrectly set limiter may sound awful! In particular, as with all limiters, using too fast an attack or release time will result in excessive low frequency distortion. In ‘design a crossover’ sub-menu there is an option for automatic limiter time constants. In this mode the time constants will be automatically set from the High pass filter frequency. See table below.

7.7. Table of automatic attack and release times.

The time constants are set by the high pass filter frequency for that channel.

High pass filter	Auto attack time	Release

<10Hz – 31Hz	45mS	x16 (720mS)
31Hz – 63Hz	16mS	x16 (256mS)
63Hz – 125Hz	8mS	x16 (128mS)
125Hz – 250Hz	4mS	x16 (64mS)
250Hz – 500Hz	2mS	x16 (32mS)
500Hz - 1kHz	1mS	x16 (16mS)
1kHz – 2kHz	0.5mS	x16 (8mS)
2kHz – 22kHz	0.3mS	x16 (4mS)

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TOA Electronics TDX2 user manual Table of automatic attack and release times, Output Limiters

Contents

TDX2 USER MANUAL Page MENUS Tannoy TDX2 Quick referenceInterface Sub-Menu AES/EBU Sub-Menu Page Contents 12.2. Grounding 14.2. Appendix 2 Default Xover Settings13. Warranty 14.1. Appendix 1 Limiter thresholdRISK OF ELECTRIC SHOCK DO NOT OPEN Important Safety InformationRISQUE DE CHOC ELECTRIQUE NE PAS ENLEVER 2. Unpacking the TDX2 3. General Overview and Features3.1. Features 1. Introduction∙ ∙ ∙ ∙ 4. Front Panel Functions 1. Power Switch 5. Rear Panel Functions6. Operating the TDX2 6.1. Preliminary Set-up 6.2. Loading a factory preset6.3. Designing your own crossover System Sub-Menu 6.4. Menu SelectionsXover Sub-Menu Input Set-up Sub-Menu7.4. Time Alignment 7. TDX2 Configurations 7.1. Introduction7.2. Crossover Modes 7.3. Filter slopes1 millisecond = 343mm 1.126ft @ 20C 68F or to calculate time delay for a known distance, useTime delay = Distance in meters 20.06 x √273+C Were C is the temperature in C. Or to simplify this equation at 20CTannoy TDX2 2×2 Way + 2 × Mono Sum X-Over Tannoy TDX2 2×3 Way X-Over 7.5. Block Diagrams of X-Over modesTannoy TDX2 4 Way + 2 X-Over Tannoy TDX2 5 Way + 1 X-Over Tannoy TDX2 6 Way X-Over 7.6. Output Limiters 7.7. Table of automatic attack and release times8. Function Screens 8.1. Parametric Equaliser Screen OP1+4 Low PEQ 1 Ο 1K00Hz B=.34 0.0dB8.2. High and Low pass filter Screens OP1+4 Low HPF 10Hz Bessel 24dB8.3. Limiter Screen OP2+5 Mid Limiter Atk4.0mS Rx16 +22dB8.5. Polarity Screen OP1 Low Delay = 1.003mS8.4. Delay Screen OP1 Low Polarity = +8.6. Gain Screen O/P1+3 LOW Gain = 0.1dBLock options 9. Menu Options 9.1. X-over Sub-Menu9.2. Input Set-up Sub-Menu 9.3. Security Sub-Menu9.5. Interface Sub-Menu 9.4. System Sub-MenuENTER keys 9.6. AES / EBU Sub-Menu Figure 3 - Parametric filter High and Low shelf curves 10. Equalisation CurvesFigure 1 - Parametric filter gain curves Figure 2 - Parametric filter Q curvesFigure 6 - Parametric filter with high Q to achieve notch response Figure 4 - High pass filter curves Figure 5 - Low pass filter curves11. Specifications 12.2. Grounding 12. Operating Notes 12.1. Operating LevelCustomer Services 13. Warrantyprosales@tannoy.com Vrms 14. Appendices 14.1. Appendix 1 Limiter thresholdVrms 4 way + 14.2. Appendix 2 Default Xover Settings2x2 way+Ms 2 x 3 wayPage ML 6th December Tannoy Nederland b.v., Anthonetta Kuijlstraat 19, 3066 GS RotterdamTel 010 286 0554 Fax Tannoy is a member of the Group of Companies