hallabackkid101
Recently I posted a topic on my Mackie SRM1801's because they had went out. I havent gotten them repaired yet but I was wondering. Is it possible to convert powered subs to passive subs? I know that there is something wrong with the power boards on both speakers. I have a amp powerful enough to power both. But is there a way to do it ?
发表时间 Tue 04 Sep 12 @ 10:31 am
drzinc
Yes its possible but you will have to do some work. The proper way would be to remove the amp modules , then make some plates to fill the hole that you now have. You will need to make sure the seal is air tight so some sort of sealer or gasket need to be used. You will also need two or four of these http://www.alliedelec.com/search/productdetail.aspx?SKU=70088548 to connect the speakers to an amp dont forget you will also need an electronic crossover to remove the highs from the signal before feeding the amp that will run the subs.
发表时间 Tue 04 Sep 12 @ 10:43 am
groovindj
Just be aware that the amp module may do more than just amplify....
There could well be some sort of EQing and filtering going on too, so powering them straight from an amp you could find that they sound different - they could even get damaged.
Also, taking the amp module out will increase the internal volume (space) of the cabinet, which will also affect the sound - depending on how much more space there is.
So yeah, it can be done - but at your own risk!
There could well be some sort of EQing and filtering going on too, so powering them straight from an amp you could find that they sound different - they could even get damaged.
Also, taking the amp module out will increase the internal volume (space) of the cabinet, which will also affect the sound - depending on how much more space there is.
So yeah, it can be done - but at your own risk!
发表时间 Tue 04 Sep 12 @ 11:08 am
Martin FourS
Some info:
• 1000W of ultra-efficient Class-D Fast Recovery™ amplification
Mackie Active electronics provide total system optimization
• Precision crossover (125Hz)
• Tuning filters for accurate bass response
The Class-D amp is a very small amp without the huge power supply that used to be mounted in amps. This will hardly take any space in the enclosure. Besides: Speaker design is mostly done within a 10% tolerance. The amp won't take 10 % of the space, so that difference is not noticable.
Groovin was right with the EQ / processing on the amp. This can be done with an external processor (like a DB DriveRack) or a programmable cross-over. You won't damage your speaker: you can't kill a speaker with frequencies that are too high, only with frequencies too low. But that's pretty hard with a sub ;)
>Here< you can find a calculator to design your low pass filter for your subs. The higher the order, the better the cross-over works. So if you go that route, go for the Fourth Order Filter and keep in mind your sub can handle power up to 1000 Watts (The coils need to be made of a thick wire)
But your best option is to use an active cross-over, set to 125 Hz.
Hope this helps.
• 1000W of ultra-efficient Class-D Fast Recovery™ amplification
Mackie Active electronics provide total system optimization
• Precision crossover (125Hz)
• Tuning filters for accurate bass response
The Class-D amp is a very small amp without the huge power supply that used to be mounted in amps. This will hardly take any space in the enclosure. Besides: Speaker design is mostly done within a 10% tolerance. The amp won't take 10 % of the space, so that difference is not noticable.
Groovin was right with the EQ / processing on the amp. This can be done with an external processor (like a DB DriveRack) or a programmable cross-over. You won't damage your speaker: you can't kill a speaker with frequencies that are too high, only with frequencies too low. But that's pretty hard with a sub ;)
>Here< you can find a calculator to design your low pass filter for your subs. The higher the order, the better the cross-over works. So if you go that route, go for the Fourth Order Filter and keep in mind your sub can handle power up to 1000 Watts (The coils need to be made of a thick wire)
But your best option is to use an active cross-over, set to 125 Hz.
Hope this helps.
发表时间 Tue 04 Sep 12 @ 11:47 am