Dual wire MJ Accoustics Pro 50 (Mk1)

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Hey all,

Quick Q, I've got an MJ Accoustics Pro 50 Mk1 (the one that had the 8" driver, 50wrms) subwoofer which has either low-level phono or high-level speaker inputs. I've seen on the Mk2 version you can dual connect the device on both high & low level, can this be done on the Mk1? My theory is I have a surround sound AV amp that uses a dedicated sub pre out, but on stero music its not all that great, so was thinking of using the speaker input. Does this make sense? Is it feasable? Worth it?

Thanks,

Ben
 
bensmith:

Hey all,

Quick Q, I've got an MJ Accoustics Pro 50 Mk1 (the one that had the 8" driver, 50wrms) subwoofer which has either low-level phono or high-level speaker inputs. I've seen on the Mk2 version you can dual connect the device on both high & low level, can this be done on the Mk1? My theory is I have a surround sound AV amp that uses a dedicated sub pre out, but on stero music its not all that great, so was thinking of using the speaker input. Does this make sense? Is it feasable? Worth it?

Thanks,

Ben

Hi. This is what I did to my MJ Acoustics Pro 50 MK2 subwoofer. I added a Neutrik subwoofer cable to enhance the stereo performance of my av receiver. So if your MK1 has a Neutrik speaker input you can do the same. It's worth it.
 
Ahhh yes I think it does have that type of connector. Where did you get your cable from?
 
Great thanks,

Is there anything to be aware of when running it dual connected?
 
Please read this....

There are three types of connection you might make whilst using the high level cable. 1. Would be to add bandwidth to your existing speakers in stereo mode, 2. Enhance the performance of your main satellites in a movie setup, or 3. To compliment a single speaker in a movie or stereo setup.
Warning
Before connecting up your MJ Acoustics Subwoofer please read this!

If you are going to connect both high level & LFE inputs at the same time please make sure that your Stereo or AV amplifier does not have a 'Digital Output Stage' or is wired in 'BTL' (Bridge Tied Load) mode.

Both of these amplifier designs will need an optional interface module (Available from your dealer or direct from MJ Acoustics).

Please note that without this interface module damage may occur to the amplifier and/or Subwoofer and is not covered under warranty.

If you are unsure please contact your supplying dealer in the first instance.

1. Stereo Mode:
You connect the 3 bare end wires of the Neutrik Speakon cable alongside your existing speaker cables on the back of your amp as follows:
RED to left + (positive)
YELLOW to right + (positive)
BLACK to ONE of the - (negatives) NOT BOTH
.
This is the most common connection for stereo amplifier users who do not have a dedicated sub output and wish to extend the bandwidth and add a new depth dimension to their existing speakers.

2. Movie Setup:

This connection is made the same way as the above "stereo mode" but is usually in addition to the sub having the low level input from the dedicated sub out on a 5.1 AV amplifier. Connections are as follows:
RED to left + (positive) - front speakers
YELLOW to right + (positive) - front speakers
BLACK to ONE of the - (negatives) - front speakers, NOT BOTH
.
The only question you may ask yourself is, do I add the high level cable to my main front satellites? or do I wish to add the high level connection to my very often smaller rear satellites to extend their bandwidth? As the rear channels these days in DTS or Dolby Digital are receiving full range signals, it can make a huge difference to your movie experience when you add a sub to your rear satellites. Your high level cable connection is then configured the same as it would be if connected to your main satellites, just connected to your rear satellite speaker outs on you AV amplifier. Of course, multipul subs can be added to any of the 5 speaker setup.

3. Single Speaker Connection:
This configuration is often used when two subs are used in stereo mode, or multipul subs are used in a 5.1 movie setup. When connecting a single speaker to the subs high level input the 3 bare end wires are connected as follows:
RED and YELLOW are wound together and connected to the + (positive) terminal of either the speaker itself or the speaker out of the AV amp. The BLACK wire is then connected to the - (negative) terminal of either the speaker itself or the speaker out of the AV amp, depending on where you placed the red and yellow cables.
A common movie setup is to have a larger sub on the LFE (Low Frequency Effects) via a phono sub out, and a smaller sub on the centre channel via the high level cable. The addition of a centre sub enhances and breathes new life into the dialogue and your movie experience takes on a new dimension due to the amount of action and low end bass produced through the centre channel - the sweet spot of a 5.1 system.
 
my rel is similer and i have two frequancy adjustments one for low level input and one for the hi level

if you can do it its worth it.

i think i got my cable from seven oaks £20.00
 

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