NAD 2200 Power Amplifier Bridge Mono NAD 1135 Pre Amplifier - Hookup
mark
amplifiers are designed to operate in this mode, but are somewhat
short on connection instructions. Each amplifier is connected to its
own speaker using the 2 speaker terminals indicated on the back of the
amp for bridged mono mode. Speaker to amp connections i think should
look like this:
Left speaker + ----------------NAD Amp #1 bridged +
Left speaker - ----------------NAD Amp #1 bridged -
Right speaker + ------------NAD Amp #2 bridged +
RIght speaker - -------------NAD Amp #2 bridged -
Connection to the preamp is less clear. My NAD 1135 preamplifier just
has a "normal" and a "high" Pre-Out L and R. I assume i'd use the
"normal" L and R ouputs like this:
Preamp Out
L--------------Y cable-----------------Poweramp #1 input L
\-----------------Poweramp #2 input L
Preamp Out
R-------------Y cable----------------Poweramp #1 input R
\----------------Poweramp #2 input R
Is this right? Thanks.
mark
Upon further thinking....what i said above is wrong. Instead i'm
thinking what i should do is use the Y cable to split the "L" preamp
output signal across both the "L" and "R" Poweramp inputs. Like this:
Preamp Out L---------Y cable-----------Poweramp #1 L and R----------
Left speaker
Preamp Out R--------Y cable-----------Poweramp #2 Land R-----------
Right speaker
Right?
Trevor Wilson
news:7kitrfF...@mid.individual.net...
>I have 2 NAD 2200 power amps, set up for bridge mono mode. These
> amplifiers are designed to operate in this mode, but are somewhat
> short on connection instructions. Each amplifier is connected to its
> own speaker using the 2 speaker terminals indicated on the back of the
> amp for bridged mono mode. Speaker to amp connections i think should
> look like this:
>
> Left speaker + ----------------NAD Amp #1 bridged +
> Left speaker - ----------------NAD Amp #1 bridged -
>
> Right speaker + ------------NAD Amp #2 bridged +
> RIght speaker - -------------NAD Amp #2 bridged -
**This is incorrect. I suggest you refer to your instruction manual. When in
bridge mode, the outputs are taken from the +ve terminals only. The -ve
terminals are not connected.
>
> Connection to the preamp is less clear. My NAD 1135 preamplifier just
> has a "normal" and a "high" Pre-Out L and R. I assume i'd use the
> "normal" L and R ouputs like this:
>
>
> Preamp Out
> L--------------Y cable-----------------Poweramp #1 input L
> \-----------------Poweramp #2 input L
>
> Preamp Out
> R-------------Y cable----------------Poweramp #1 input R
> \----------------Poweramp #2 input R
>
> Is this right? Thanks.
**You should use the input terminal labelled 'mono'. One connection per
channel.
--
Trevor Wilson
www.rageaudio.com.au
mark
wrote:
> "mark" <mpgm...@gmail.com> wrote in message
there are 4 inputs on the back of the NAD 2200 poweramplfier. "LAB"
and "NORMAL" L and R. Neither says mono. There is a switch for bridge
mono which of course i have selected. I thought i'd need to feed both
the L and the R sides of the poweramp the same output from the preamp.
I think what you're suggesting is feeding a single poweramp input
should suffice.
CJ
>and "NORMAL" L and R. Neither says mono. There is a switch for bridge
>mono which of course i have selected. I thought i'd need to feed both
>the L and the R sides of the poweramp the same output from the preamp.
>I think what you're suggesting is feeding a single poweramp input
>should suffice.
If I recall correctly from privious NAD amps, the 'Lab' input was a full
freq range input, while the 'Normal' input had out of audio band frequency
filtering applied.
Normally if a power amp offers a bridged mode then you connect the speaker
to the Left + and Right + terminals and connect the preamp to just one of
the channel inputs. The amp inverts this signal and feeds it to the other
amp input internally. I'm surprised which one to connect to isn't marked
but a quick bit of trial and error should work it out if you can't find the
user instructions. Obviously power down the amp when swapping the input
connection!!
CJ
>and "NORMAL" L and R. Neither says mono. There is a switch for bridge
>mono which of course i have selected. I thought i'd need to feed both
>the L and the R sides of the poweramp the same output from the preamp.
>I think what you're suggesting is feeding a single poweramp input
>should suffice.
Just found the 2200 service manual online and from looking at the schematic
you connect the pre-amp to the left input only. 'Normal' input is a freq
limited version of 'Lab' input as previously guessed.
mark
got it, thank you...where did you find the service manual? Thanks
CJ
I Googled NAD 2200 manual and found the following link pretty quickly..
http://www.audio-circuit.dk/Schematics/NAD-2200PE-pwr-sm.pdf