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Converting 2 channel amplifier to 2.1 amplifier

I have a two channel amplifier.
i need to atach a subwoofer to it and make it a 2.1 amplifier. how can i do it? please help me sir.

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  • WINSTONWILKO Jan 02, 2009

    Have a 2 chael 4 speaker denon dr 68 with 8 inc cieling speakers run thru a niles control want to add a powersub with posts.

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It is not availlable to do such convertion.

Posted on Jul 08, 2008

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You don't say if your 8 speakers are in the same or different rooms. Let's assume the same room. You also don't say what the Niles control is, so I assume it's a speaker selector.

Usually a speaker selector will have the speaker wires from the receiver go to the inputs of the selector and the 8 speaker connections on the outputs. If the speakers are in the same room run the speaker connections to the sub's speaker level inputs first, then take the speaker level (satellite output) to the switch.

The sub will split out the bass portion of the signal and send the higher frequencies to the satellites (ceiling speakers).

If the four pairs (8 celiing speakers) are in different rooms a subwoofer will be required for each room. For this configuration you would run the receiver's speaker output to the switch. This provides full-range sound to each room when selected.

In each room, instead of going to the ceiling speakers first, connect the wires from the niles switch to the sub's speaker-level input, then from the sub's speaker level output to the ceiling speakers. This configuration would require more subs. One option is to terminate each of the niles speaker output in each room to a wall plate (L and R). On the same wall plate have connections to the ceiling speakers (L and R).

Whenever you want to listen to music in a particular room, take the sub to the room, run the cables from the walljack (niles connections) to the speaker level inputs of the sub, then connect the sub's speaker level outputs to the walljack's connection to the ceiling speakers. This should be more cost effective.

Posted on May 13, 2009

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1 Answer

The wires from Line level converter where to hook them up?


Firstly, and definitely, your "black" is subwoofer line out.

Check your AV receiver if the subwoofer option is activated. I've known some receivers that have the option to disable subwoofers and push all the bass into their front speakers.

Next, you have to check if your subwoofer is on or off? what about the volume of the sub?

If your subwoofer is passive, which means it does not require powering up using the mains, then you will have to get a seperate amplifier to power the sub up.

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I have just bought an Behringer EP4000 amp. How do I connect 2 x B1520 and 1 x B1800X speakers to this amp? Thanks!


You don't (unless you want two B1520's on one channel and the sub on another). Reading the manuals would help.

The EP4000 amp drives only two channels. It CAN be bridged for one speaker but it won't support two channel and bridged mode simultaneously.

http://www.retrevo.com/support/Behringer-EP4000-Amps-manual/id/23591dj795/t/2/

The B1520 subwoofeer is PASSIVE so it will need a dedicated amplifier to power it and control its volume independently of other speaker channels.

http://www.behringer.com/EN/Products/B1800X.aspx

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Good afternoon, I recently bought a SA VE325 speaker set it contained a subwoofer, 4 little boxes and a mid-large box which you haeb have tpo piuyt above uyour tv. Now the problem is we have no cCENTER to...



Hello there looking at the manual i would assume that the mid-large box is actually your centre speaker.

Did you mean that there are no connections left on the back of your amplifier? For a centre speaker this system uses all passive speakers apart from the subwoofer which has a built in amplifier for just the subwoofer, your hifi or home cinema amplifier would need to have at least 5 separate channels to operate the centre speaker as well as the front and rear speakers.

Ideally you would need a 5.1 channel or 5 channel amplifier with subwoofer pre output, any would do but to make things simple one with a digital optical or coaxial input would be best as this can easily carry multi-channel audio with just one connector.

The other alternative if your amplifier does not have a centre speaker output are:



· to get another basic mono stereo amplifier to power the centre speaker on its own however if your main amplifier does not have a pre out connector for a centre speaker you will have to change the volume independently on both amplifiers



· don

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Im trying to hook up a paradigm pdr-12 to my tv and xbox 360 and need an idea of how to do this the right way so it only plays the bass and nothing else


Hello there this subwoofer has a built in crossover variable from 50hz to 150hz which means that any signal you feed it the sub it will ignore anything but bass anyway.

As for the connection it is made quite difficult if you don't already have an amplifier powering your other speakers, usually home cinema amplifiers have a low level pre out for subwoofers, for which you would just need a phono to phono cable.

However if it doesn't and you have any type of amplifier with at least 2 separate left and right speakers you can connect the wires from these into the subwoofer and it will output the bass from these 2 channels.

Another option is to use a mono to stereo (2 to 1) phono cable where the 2 connectors at one end connect to a tape or record output on your amplifier and the single phono at the other connects to the subwoofer, the same would go if you have a red & white phono (RCA) output on your TV you could also use this to power the sub, in the worst case scenario you could use a single to single phono or rca cable to connect one of the output channels (left or right) on your TV to the subwoofer however this would mean that the subwoofer would only output bass from either the left or right channel.


Hope this helps


Kind Regards

Ant

Aug 26, 2011 | Speakers & Subwoofers

2 Answers

Best amplifier for bose 901 VI speakers


By all-in-one amplifier that handles the surround I think you mean all-in-one receiver or preamp. Amps are just big dumb muscular power supplies for speakers.

The source control and digital decoding could be handled by a modern AV receiver with multichannel analog outputs for driving separate amps or you could get a digital AV preamplifier/control unit functionally like this Adcom. Prepare for sticker shock.

http://hdtvdreams.com/Adcom-GTP-870HD-7.1-Multi-Channel-Processor/Preamplifier-GTP870HD.aspx

Understand that EACH PAIR of Bose 901's will require its own DEDICATED two channels of amplification AND someplace to jack in its Active Equalizer - between the line level source and the power amp.

Conventional speakers can probably run off the receiver's amplifiers since they don't/can't/must not have the Bose Active EQ in line with them.

Having a single pair of 901's plus a passive subwoofer or two in the same room for accurate 6- or 7.1 surround would require at least four stereo amps or some combination that adds up to 8 channels.

In my own system I have a Pioneer VSX-36TX Receiver (with 5 potential channels of amplification for Left, Right, Center, two Surrounds) doing light duty as the control and routing center but ONLY driving the Center (two Kenwood 777's) and Surround speakers (Bose 301's). I have a Carver 5-channel amp pushing the Bose 901 Front speakers (100Wx2), two dbx Subwoofers (110Wx1) and the Bose 301 Rear Surround speakers (60Wx1).

You could probably get by with a powerful 2-, 3- or 4-channel amplifier to push the 901's and subwoofer(s) as I did. It's the cheapest way out if you get a decent AV receiver. Once you set up the levels and delays the receiver does all the thinking and controlling for you.

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1 Answer

Bose 901 hook up


Assuming you really want to have a working surround system you will need a separate stereo amplifier for the 901's to accomodate the need for the Active EQ. There is no way to separate your receiver's front L&R channel preamplifiers from their amplifiers.

I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver and the 901's amp channels. My receiver controls everything and just drives the Center and Surrounds. You would probably just get a nice 2-channel amplier for the 901's. However, the TX-SR606 doesn't provide power for a Subwoofer, should you decide to get one, so you would need another amplifier channel for that, too. Therefore, you might look around for a powerful 3- or 4-channel amplifier so you could drive the Sub, too.

Modest amps would work but at very loud volumes may go into clipping, which is bad for any speaker. I'm using only 100W for mine and it has plenty of steam for the 901's.

For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ';s Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

Not what you might want to hear but 901's have special requirements. I've had mine for 25 years and have no regrets.

A seperate subwoofer channel on the amp could be used. Just run a single RCA channel from Sub OUT to one available channel IN on the amp and attach the subwoofer to it. Two would work, also. That's what I do. You could use a 1-2 RCA splitter to feed two avaailable channels on a 4-channel amp. The iterations are many. Have fun.

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2 Answers

How to connect 901 equalizer to a Pioneer VSX 47TX


I have a VSX-36TX so this is how it's going to work...

You will need a separate stereo amplifier for the 901's to accomodate the need for the Active EQ. There is no way to separate your receiver's front L&R channel preamplifiers from their amplifiers.

I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver and the 901's amp channels. My receiver controls everything and just drives the Center and Surrounds. You would probably just get a nice 2-channel amplier for the 901's. However, the VSX 47TX doesn't provide power for a Subwoofer, should you decide to get one, so you would need another amplifier channel for that, too. Therefore, you might look around for a powerful 3- or 4-channel amplifier so you could drive the Sub, too.

Modest amps would work but at very loud volumes may go into clipping, which is bad for any speaker. I'm using only 100W for mine and it has plenty of steam for the 901's.

For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

Not what you might want to hear but 901's have special requirements. I've had mine for 25 years and have no regrets.

A separate subwoofer channel on the amp could be used. Just run a single RCA channel from Sub OUT to one available channel IN on the amp and attach the subwoofer to it. Two would work, also. That's what I do. You could use a 1-2 RCA splitter to feed two avaailable channels on a 4-channel amp. The iterations are many. Have fun.

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1 Answer

Conversion to home theatre


You will need a separate stereo amplifier for the 901's to accommodate the need for the Active EQ. There is no way to separate your receiver's front L&R channel preamplifiers from their amplifiers.

I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver and the 901's amp channels. My receiver controls everything and just drives the Center and Surrounds. You would probably just get a nice 2-channel amplier for the 901's. If your receiver requires a powered Subwoofer so you would need another amplifier channel for that, too. Therefore, you might look around for a powerful 3- or 4-channel amplifier so you could drive the Sub, too.

Modest amps would work but at very loud volumes may go into clipping, which is bad for any speaker. I'm using only 100W for mine and it has plenty of steam for the 901's.

For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

Not what you might want to hear but 901's have special requirements. I've had mine for 25 years and have no regrets.

A separate subwoofer channel on the amp could be used. Just run a single RCA channel from Sub OUT to one available channel IN on the amp and attach the subwoofer to it. Two would work, also. That's what I do. You could use a 1-2 RCA splitter to feed two available channels on a 4-channel amp. The iterations are many. Have fun.

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2 Answers

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Most AV receivers do not have a built in amplifier block to drive a subwoofer, and merely provide the subwoofer output channel at line voltage. Thus, a powered subwoofer is required. Does the subwoofer require mains power? From your description, I'm guessing it doesn't. If not, it does not have a buit in amplifier, you will need to purchase a monoblock amplifier, which is just a mono amplifier with a volume control, no tone controls or anything else. Make sure that the amplifier power rating is as close as possible to the subwoofer power rating, as it is quite possible to blow a speaker by using an amplifier whose power output is too low, by overdriving the amplifier , and putting DC through the voice coil when the amplifier clips. If it does require mains power, it will have an amplifier built in, but does not have line level inputs.

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