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Old 16th April 2004, 09:04 AM   #1
diyAudio Member
Join Date: Feb 2003
Location: Guimaraes
Default HELP to connect a subwoofer

I recently buy an NAD Processor T163.
This Processor has an adjustable crossover of 40-200Hz.
I have a box of 60 litres with a 12’ drive of Monacor (SPH-315). Do I need to make a crossover to put in my DIY subwoofer?
If not, can I use my NAD C320 as a Power amp to connect directly to the sub (drive)?
As I have two pre-out in the T163 can I connect this two to the Main In of the C320 and “Bi-amp” the sub?

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Old 16th April 2004, 01:21 PM   #2
diyAudio Member
Join Date: Apr 2003
Location: Great Southwest
If you have a crossover in your preamp/receiver, there's no reason to put one in the subwoofer.

Yes, you would connect from the "sub out" to any mono amp or one channel of a two channel amp... and then to the sub.

You can use two outputs feeding two amplifiers ONLY if the sub is a dual-coil driver. You CANNOT connect the outputs of two amplifiers to the same woofer coil. As an alternative, if you have a way of inverting one of the inputs (simple opamp circuit will do this), you can bridge the two channels of the amp to drive one coil.
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Old 16th April 2004, 02:14 PM   #3
audioPT is offline audioPT  Portugal
diyAudio Member
Join Date: Aug 2002
Location: Right here
Olá Cristiano.

Segue este link

Podes construir numa placa perfurada e colocá-la dentro do teu NAD C320.

1 @braço

Pedro Martins

Hi Cristiano
Follow this [URL =] link [/URL]
You can made it in a perfurated board and install it in your NAD C320
A big hug
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