DPA-480:是一个4进8出的音箱处理器.4个输入电平由6个电平灯+1个削顶灯排列组成.8个输出电平由
5个电平灯+1个削顶灯+1个限幅灯排列组成.该机器有4个模拟输入,2个立声体数字输入和8个模拟输出.
每个输入有5段滤波器,每个输出有7段参数滤波器.输入和输出都可以选择为贝塞尔,在切频上-3dB的
1/2阶雪夫,有可变Q值的对称雪夫,有可变Q值的高/低通,1,2阶,全通滤波(90/180Deg.在切频上的相位
旋转),带通滤波和陷波.输出分频部分有高达48dB/Oct的Butterworth,Lin/Reyl和Bessel滤波器.
有选择比达到32:1的RMS压限和可调节的软/硬压缩.有THR的输出峰值限幅有Vp或dBu来保护喇叭.RMS
压限和峰值限幅的THR范围是-30dBu.22Us的步进,每个输入和输出通道有高达850ms的延时.在输入之
间和输出之间上都有连动功能.当这个机器作为安装机器时,参数改变时该功能可以让ramps关闭输出
电平.当需要现场演示和需要参数微小的改变,可以取消这个功能来设置运行.给遥控控制的PC软件允
许连接32台机器并且可以展示滤波器设置的相位和通过图表调节RMS压限峰值限幅.在DPA-480上有内
存卡来保存和调用预设.遥控软件可以通过当地的USB界面,RS485或者TCP/IP网络界面工作.在DSP480
上运行的所有音频处理,都是MARANI品牌独有的,这已经在专业音频领域众所周知的了,并且运用新的
DSP来给DPA-480了.
DPA-480:it is a 4 input x 8 output Speaker Processor. The 4 input levels are displayed by rows of 6 level
leds +1 clip led, The 8 output levels are displayedby rows of 5 level leds +1 clip led +1 Limiter led. The
unit has 4 analog inputs, 2 stereo digital input, and 8 analog outputs. Each input has 5 filters and each
output has 7 parametric filters. Both input and output filters can be selected to be Bell, 1st/2nd Ord Shelvings
with -3dB at cutting Freq., Symmetrical Shelving with variable Q, Hp/Lp with variable Q, 1st/2nd Ord. All
Pass (90/180Deg. Phase rotation at the cutting freq.), bandpass and notch. The outputs X-Over section has
Butterworth,Lin/Reyl and Bessel filters up to 48dB/Oct or Custom selectable Hp/Lp with up to 48dB/Oct with
the cascaded Iind Ord cells adjustable in Freq and Q. RMS compressor with selectable Ratio up to 32:1 and
adjustable Soft/Hard Knee.Output Peak Limiter with THR in Vp or dBu for the Loudspeakers protection. The
RMS compressor and Peak Limiter's THR can range up to -30dBu. Each input and output channels have
delays up to 850ms, with steps of 22usec.Linking functions between inputs and linking functions between
outputs are available. A function is allowing to have ramps closing the output level on parameter changes,
when the unit is used as installation unit; this function can be excluded when the unit is used live and it is
necessary to perform small changes to the set parameter...on the fly. The Pc SW for the remote control is
allowing to connect in net up to 32 units and is allowing to show the phase of the filter setting and to adjust
graphically the RMS compressor and the Peak limiter. A Flash card is available on the DPA-480 for storing
and recalling presetsThe remote control Sw can work through a local USB interface, a RS485 or a TCP/IP
net interfaces.The all Audio Processes running on the DPA-480, are MARANI proprietary algorithms, already
well known in the PRO Audio Industry, and properly adapted for the new powerful DSP powering the DPA-480
DPA-480 特点
最大延时: 848.998ms,步进精度为:21us
参数均衡器: 每个输入通道都有5个滤波器可设定为贝塞尔或雪弗滤波器
滤波器的类型: 对称的贝塞尔或高/低雪弗滤波器, 可延续到二阶
滤波器增益: 贝塞尔和雪弗的增益调节范围为:-15dBu ~+15dBu,步进精度为:0.5dBu
中心频率: 在20Hz~20kHz频带范围内以1/24倍频程的步进精度可供调节
滤波器 Q值/带宽: 范围为:0.4/3.59~10/0.0312,步进精度为:0.1 (dB/oct)
一旦设定Eq的每个滤波器,“旁通”效果特别明显
高通滤波器 频率: 20Hz~20kHz 斜率:-6dB/Oct到-24dB/Oct可选
(类型:巴特沃斯,林奎茨-瑞利,贝塞尔,可选)
低通滤波器: 频率:20Hz~20kHz 斜率:-6dB/Oct到-24dB/Oct可选
(类型:巴特沃斯,林奎茨-瑞利,贝塞尔,可选)
分辨率为: 1/24 倍频程
RMS限幅器
启控阈值: 范围:18dBu~-12dBu
启控时间 范围: 5毫秒~200毫秒,在5毫秒~20毫秒区间,步进精度为:1毫秒在20毫秒~
100毫秒区间,步进精度为:10毫秒,在100毫秒~200毫秒区间,步进精
度为:20毫秒
释放时间范围: 0.1秒~3秒,步进精度为:0.1秒
比例范围: 1:1(非激活)~32:1(硬限幅)
拐点: 有软硬可调
峰值限幅器
启控阈值: 范围:18dBu~-12dBu
启控时间 范围: 5毫秒~200毫秒,在5毫秒~20毫秒区间,步进精度为:1毫秒在20毫秒 ~
100毫秒区间,步进精度为10毫秒,在100毫秒~200毫秒区间,步进精度
为:20毫秒
释放时间范围: 0.1秒~3秒,步进精度为:0.1秒
音量电平 1个LED显示灯指示幻象电源激活,5个LED显示灯指示输出激活:线线输
入选择麦克风-麦克风输入选择反馈-反馈激活(只有选择麦克风输入)信
号/削波—当前信号在通道上指示灯变蓝色;当信号削波压限指示灯变成红
色---表明RMS压缩器或峰值压限器激活状态。
DPA-480 Main Features
Delay & Gain
Maximum Delay: 848.998ms by 21us increment/decrement step, on each Input and
Output channel
Spdif input gain(Digital): 0dBu on RCA connector
Parametric Equalization: 7 filters on each input assignable as Bell or Shelving
7 filters on each output assignable as Bell or Shelving