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Forum: General Discussion

Topic: Tech question about bass frequencies

由于该帖子已年深日久，可能包含陈旧过时或描述错误的信息。

Hi Guys,

My first post. I have a technical question..

I am using VDJ Pro with a Numark N4, I have 2 full range 12" speakers and 2 18'' subs. I would like to know how I go about sending only the mid and top frequencies to my 12'' cabinets and letting the subs handle all the bass.
Currently all speakers are playing bass which isn't ideal.

Hope someone can help. Thanks!!!
Ross
 
发表时间 Wed 07 May 14 @ 10:40 am
 
rossmck wrote :
I am using VDJ Pro

Please take the time to register the serial number to your account here, so your info shows under your user name.


rossmck wrote :
how I go about sending only the mid and top frequencies to my 12'' cabinets and letting the subs handle all the bass.

If your speakers are passive ones (i.e. you're using a separate amp) then you'll need a second amp and an active crossover.

If they're powered speakers then the crossover is usually built into the sub and there'll be high pass outputs for feeding to the mid/top speakers.
 
Are you talking about a pre amp? Something like mixer - pre amp - crossover - amp - passive speakers ?

 
 
Haha yeah. Do you need a pre amp, or can you do mixer - crossover - amp - speakers
 
The mixer is the pre amp (it boosts small signals to a level suitable for connecting to a power amp).

So when you want to bi-amp your system, the sequence is mixer -> active crossover -> two amps -> two pairs of speakers.

You can also get crossovers which split to three or more frequency bands. Some do two way stereo or three way mono.
 
Thanks for the info. I have passive speakers (Ohm UK ones), and 2 amps. One amp powers the subs and has a low pass filter. The other amp just sends everything to the full range speakers. So it sounds like i need an active crossover?
 
rossmck wrote :
So it sounds like i need an active crossover?


Yes - or another amp that's got a filter onboard which can be set to "high pass" (filter out the bass).

Behringer CX2310 is cheap. DBX is a well known brand. There are also more advanced "loudspeaker management systems" which offer compressor/limiter, EQ etc. on top.
 
Ah. See when I had passive speakers I had a GX3 amp, which has a built in crossover
 


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