hooking up two power amps and a pre

thezaman · 23rd September 2007, 03:49 PM

Hi I just got two used nad 2040 power amps and a pre amp .I want to use one amp per channel .i don't know how to do this,can some one help me.I have no idea if they are bridgable or not .The back of the amps has a choice of 4 or 8 ohm loads,speaker connections,and a pair of rca plugs>

gmphadte · 24th September 2007, 04:29 AM

If there is no switch, mostly at the rear for bridge connection, then they cannot be operated in the bridge mode. U can make a bridging circuit, if u like.
Visit here

Both the channels have to be in spec condition to bridge them.

Gajanan Phadte

Chartal · 24th September 2007, 05:52 AM

There is no 2040 power amp in the Nad website.
But there is a 2240 and a 2400.

The 2400 can be bridged.

thezaman · 24th September 2007, 02:07 PM

sorry they are 2240 power envelope amps.Can those be bridged?

Bigred · 24th September 2007, 06:11 PM

There are no bridged specs listed so I doubt its bridgeable. I know the 2100 is bridgeable and its stated in the specs (see links below). Personally I'm not a fan of running bridged amps. The damping factor is halved and many amps don't like loads under 8ohms bridged. Depending on your goals you might want to look into bi-amping.

http://207.228.230.231/info/NAD_2240.pdf
http://207.228.230.231/info/NAD_2100.pdf

thezaman · 25th September 2007, 04:24 PM

My goal is to use two 40 watt power amps and one pre amp to get the best sound from my acoustic research 93 speakers . So if thet are not bridgable .Can they be biamped and how do you do it?I am a newbe to the community so you explanation needs to be a simple one.Thanks for any help you can give me.

Bigred · 25th September 2007, 06:26 PM

Are you referring to the AR-93's? If I'm not mistaken they are not bi-amp ready (They only have one set of binding posts so you would need to physically seperate the crossover network providing the crossover is a parallel type). Even if they had 2 sets of binding posts or you physically seperated the crossover network, this only seperates the LF and HF passive networks. This type of setup can be used to bi-wire or to passive bi-amp. The other solution would be to active bi-amp. With passive the filtering is done AFTER the amplifiers and active its done at the line level. The active setup becomes rather complex and requires an electronic crossover (bypassing the passive crossovers) with considerable skills to tune and balance everything. I'm honestly not sure what to tell you at this point. Do a search on biamping to start learning and decide if this is something you feel like tackling.

thezaman · 25th September 2007, 08:03 PM

thanks ,Iam just going to use a receiver for each channel ,probably no sonic advantage but it's the only way to utilize both.Tanks for you help!

23rd September 2007, 03:49 PM	#1
thezaman diyAudio Member Join Date: Jun 2007	hooking up two power amps and a pre Hi I just got two used nad 2040 power amps and a pre amp .I want to use one amp per channel .i don't know how to do this,can some one help me.I have no idea if they are bridgable or not .The back of the amps has a choice of 4 or 8 ohm loads,speaker connections,and a pair of rca plugs>

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Noob Question: Hooking up 2 positive Linear power supplies for +- output?	hifimaker	Parts	1	16th March 2007 12:57 AM
Hooking up Pass amps with theater gear	2Bak	Pass Labs	9	4th January 2007 06:10 AM
SMPS for diy audio amps and multi-channel diy amps (and their power supplies)	tlparker	Solid State	18	31st August 2006 10:39 AM
Hooking up Charlize to the PC power supply, with some weird results	eVITAERC	Class D	24	18th November 2005 05:09 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

24th September 2007, 04:29 AM	#2
gmphadte diyAudio Member Join Date: Jul 2003 Location: Dona paula, Goa	If there is no switch, mostly at the rear for bridge connection, then they cannot be operated in the bridge mode. U can make a bridging circuit, if u like. Visit here Both the channels have to be in spec condition to bridge them. Gajanan Phadte

24th September 2007, 05:52 AM	#3
Chartal diyAudio Member Join Date: Nov 2004 Location: Montreal	There is no 2040 power amp in the Nad website. But there is a 2240 and a 2400. The 2400 can be bridged.

24th September 2007, 02:07 PM	#4
thezaman diyAudio Member Join Date: Jun 2007	sorry they are 2240 power envelope amps.Can those be bridged?

24th September 2007, 06:11 PM	#5
Bigred diyAudio Member Join Date: Jul 2007	There are no bridged specs listed so I doubt its bridgeable. I know the 2100 is bridgeable and its stated in the specs (see links below). Personally I'm not a fan of running bridged amps. The damping factor is halved and many amps don't like loads under 8ohms bridged. Depending on your goals you might want to look into bi-amping. http://207.228.230.231/info/NAD_2240.pdf http://207.228.230.231/info/NAD_2100.pdf

25th September 2007, 04:24 PM	#6
thezaman diyAudio Member Join Date: Jun 2007	My goal is to use two 40 watt power amps and one pre amp to get the best sound from my acoustic research 93 speakers . So if thet are not bridgable .Can they be biamped and how do you do it?I am a newbe to the community so you explanation needs to be a simple one.Thanks for any help you can give me.

25th September 2007, 06:26 PM	#7
Bigred diyAudio Member Join Date: Jul 2007	Are you referring to the AR-93's? If I'm not mistaken they are not bi-amp ready (They only have one set of binding posts so you would need to physically seperate the crossover network providing the crossover is a parallel type). Even if they had 2 sets of binding posts or you physically seperated the crossover network, this only seperates the LF and HF passive networks. This type of setup can be used to bi-wire or to passive bi-amp. The other solution would be to active bi-amp. With passive the filtering is done AFTER the amplifiers and active its done at the line level. The active setup becomes rather complex and requires an electronic crossover (bypassing the passive crossovers) with considerable skills to tune and balance everything. I'm honestly not sure what to tell you at this point. Do a search on biamping to start learning and decide if this is something you feel like tackling.

25th September 2007, 08:03 PM	#8
thezaman diyAudio Member Join Date: Jun 2007	thanks ,Iam just going to use a receiver for each channel ,probably no sonic advantage but it's the only way to utilize both.Tanks for you help!