Operation - R&H DPi Series User Manual

DPi Series
5. Setup output channed EQ parameter
6. Setup route of each channel and delay, HPF, LPF, Limit parameter.
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Fig 2.4
Fig 2.5
Reference Manual

2 Operation

2.1 Protecting Your Speakers
It's wise to avoid clipping the amplifier signal. Not only does clipping sound bad, it can damage high-frequency
drivers. To prevent clipping, use software to enable the peak voltage limiter in your amplifier built-in DSP. That
way, no matter how strong a signal your mixer produces, the amplifier will not clip. Set the limiter threshold so
that mixer signals above 0 dB or 0 VU on the mixer meters do not quite drive the amplifier into clipping.
Also, avoid sending strong subsonic signals to the amplifier. High-level, low-frequency signals from breath pops
or dropped microphones can blow out drivers. To prevent subsonic signals, use one of these methods:
□ Insert a high pass filter between mixer output and amplifier input (or between mixer and limiter).
□ Switch in high pass filters at your mixer. Set the filter to as high a fre-quency as possible that does not affect
your program. For example, try 35 Hz for music and 75 Hz for speech. On each mixer input channel, set the filter
frequency just below the lowest fundamental frequency of that channel's instrument.
2.2 Startup Procedure
Use the following procedure when first turning on your amplifier:
1. Turn down the level of your audio source.
2. Turn on the Power switch. The LCD Control Screen should light up.
3. Turn down the amplifier Encoder knobs (Level controls).
4. Turn up the level of your audio source to an optimum level.
5. Turn up the amplifier Encoder knobs (Level controls) until the desired loudness or power level is achieved.
6. Turn down the level of your audio source to its normal range.
If you ever need to make any wiring or installation changes, don`t forget to disconnect the power cord.
For help with determining your system`s optimum gain structure (sig-nal levels) please refer to the user`s manual
Application Guide.
2.3 Precautions
Your amplifier is protected from internal and external faults, but you should still take the following precautions for
optimum performance and safety:
1.Before use, your amplifier first must be configured for proper operation, including input and output wiring
hookup. Improper wiring can result in serious operating difficulties. For information on wiring and configuration,
please consult the Setup section of this manual or, for advanced setup techniques, consult Crown`s Amplifier
Application Guide available online at
2.Use care when making connections, selecting signal sources and controlling the output level. The load you
save may be your own!
3.Do not short the ground lead of an output cable to the input signal ground. This may form a ground loop and
cause oscillations.
Reference Manual
DPi Series
Page 6