Processing Features - HPA D1500 Owner's Manual

Processing Features

Processing Features
The D Series amplifiers include a number of integrated processing features
which appear on the front panel LCD screen.
MODE
* Stereo : In this mode, Channel 1 input signal goes to Channel 1 output and
Channel 2 input signal goes to Channel 2 output.
* INPUT Y : In this mode, the Channel 1 input signal sent to the Channel 1 and
Channel 2 output. The Channel 2 input signal is ignored.
* BRIDGE : In this mode, the power of both amplifier channels are delivered into a
single 8 or 4 ohm load.
MENU
* HPF : This filter reduces unwanted, potential energy-robbing low-end frequen-
cies. Setting an appropriate high-pass filter frequency also helps protect the
loudspeaker from damage.
In this MENU, you can set roll-off frequency which are 40, 50, 63, 80, 100,
125Hz.
* LPF : In this MENU, you can set roll-off frequency which are 6.3K, 8K, 10K, 16K,
20KHz.
* PEQ, 8BAND : There are 8 band parametric EQ which are 100Hz, 200Hz,
400Hz, 800Hz, 1.6KHz, 3.15KHz, 6.3KHz, 12.5KHz. We can adjust Q value and
gain for boost and cut in this mode. Adjustable Q range is 0.5 ~ 5 by 0.5 step.
Adjustable gain range is +/-6dB by 1dB step. We can adjust Q and gain for sound
envirement.
* LIMITER : LIMITER provides your amplifier and system with higher performance
and better protection. There is just one parameter of THRESHOLD for easy set up.
We can set up threshold level by 0dB, -3dB, -6dB, -12dB.
* DELAY : Total dealy time is 20mS per channel. Adjustable step is that 0~3mS /
0.25mS step, 3~10mS / 1mS step and 10~20mS / 2mS step.
* X-OVER in INPUT Y : X-OVER system provides a variable state Linkwitz-Reley
24dB/oct filter allowing you to choose a point between 50Hz AND 3.15KHz on
1/5th oct centers.The following point are 50Hz, 56Hz, 64Hz, 74Hz, 85Hz, 98Hz,
112Hz, 129Hz, 148Hz, 171Hz, 196Hz, 225Hz, 259Hz, 342Hz, 392Hz, 451Hz,
518Hz, 595Hz, 684Hz, 786Hz, 903Hz, 1.03KHz, 1.2KHz, 1.37KHz, 1.57KHz,
1.8KHz, 2.08KHz, 2.4KHz, 2.7KHz, 3.15KHz.
10
D1000 / D1500 / D2000 / D2500