basically i have a pair of B+W DM610's that have a good sound, but not much power. i want to get a sub, not for massive bass extension, but just to take the low frequency burden off of the 610's drivers.
i know nothing of all this malarkey and building my own is a bit far off right now. so looking for a second hand sub around £50-£100.
what i'd like to do (amp is only 2.0) is have L+R channels coming from the amp, to the sub, (active) sub puts low freq's to bass driver and passes high/mids back out to 610's. but, without messing too much with mid/high's produced from amp. is this possible?
i don't know the correct terminology to use to be able to find something that suits. i've seen one on ebay and the back looks like it might accomodate, but don't know if you have to have a seperate 'sub out' from amp for it - as there's RCA input on the back aswell as high freq in/out. http://www.richersounds.com/product/subwoofers/mordaunt-short/alumni-9/mord-alumni9-blk
here's a pic of the back
if someone could kindly tell me what that function is called or correct terminology to search for, also any fairly ok models to keep my eye out for second hand.
cheers
i know nothing of all this malarkey and building my own is a bit far off right now. so looking for a second hand sub around £50-£100.
what i'd like to do (amp is only 2.0) is have L+R channels coming from the amp, to the sub, (active) sub puts low freq's to bass driver and passes high/mids back out to 610's. but, without messing too much with mid/high's produced from amp. is this possible?
i don't know the correct terminology to use to be able to find something that suits. i've seen one on ebay and the back looks like it might accomodate, but don't know if you have to have a seperate 'sub out' from amp for it - as there's RCA input on the back aswell as high freq in/out. http://www.richersounds.com/product/subwoofers/mordaunt-short/alumni-9/mord-alumni9-blk
here's a pic of the back
if someone could kindly tell me what that function is called or correct terminology to search for, also any fairly ok models to keep my eye out for second hand.
cheers
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well i was nearly there in the thread title. high pass filter is what's needed.
could anyone PLEASE (!) help me with this...
i'm looking at second hand active subs, one is 5ohm and one is 6ohm. my amp is 100Wpc @ 4ohm/50Wpc @ 8ohm. my speakers are 4ohm, so the amp is more suited for them. does either sub simply allow 4ohm mids/highs to pass through or will the passed through signal become 5/6ohm into speakers? will this create distortion of some sort?
EDIT: or will it not matter at all?
could anyone PLEASE (!) help me with this...
i'm looking at second hand active subs, one is 5ohm and one is 6ohm. my amp is 100Wpc @ 4ohm/50Wpc @ 8ohm. my speakers are 4ohm, so the amp is more suited for them. does either sub simply allow 4ohm mids/highs to pass through or will the passed through signal become 5/6ohm into speakers? will this create distortion of some sort?
EDIT: or will it not matter at all?
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hi reg i don't sure the sub amp second hand because i only have the seven hand! which come to me very old. in ur case as far as i can't see, the MS amp option in-out is perfect likes a beautiful woman. u can use the high level in out with no have any problem.
This is an example of A Dayton's amp:
High-Level Inputs: Speaker level inputs using binding post type jacks to permit connection with banana type plugs or spade terminals. Used to connect from the speaker outputs of the full range amplifier to the input of the subwoofer amp with speaker wire. A mono signal is derived from the stereo speaker level source, which then feeds the subwoofer amplifier crossover input.
High-Level Outputs: Used to connect from the subwoofer amp to pass signal from the full range amp on to the main L/R speakers. Signal is only present on this output if the high level input is also used. The signal to the L/R speakers will be shaped by an internal 6 dB/octave 125 Hz high pass filter.
ref: http://www.parts-express.com/pedocs/manuals/300-802-dayton-audio-sa100-manual.pdf
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I think this is the kind of information you need to know to make a choice.
High-Level Inputs: Speaker level inputs using binding post type jacks to permit connection with banana type plugs or spade terminals. Used to connect from the speaker outputs of the full range amplifier to the input of the subwoofer amp with speaker wire. A mono signal is derived from the stereo speaker level source, which then feeds the subwoofer amplifier crossover input.
High-Level Outputs: Used to connect from the subwoofer amp to pass signal from the full range amp on to the main L/R speakers. Signal is only present on this output if the high level input is also used. The signal to the L/R speakers will be shaped by an internal 6 dB/octave 125 Hz high pass filter.
ref: http://www.parts-express.com/pedocs/manuals/300-802-dayton-audio-sa100-manual.pdf
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I think this is the kind of information you need to know to make a choice.
If your speakers are ported the best chance you have is to stuff some socks in the ports to convert the boxes to a 12dB/oct roll off, and then try and blend your subs crossover into it.
If your amplifier is nothing special then maybe buy a 2nd hand home cinema amp which will give you some crossover options.
If your amplifier is nothing special then maybe buy a 2nd hand home cinema amp which will give you some crossover options.
Sod it, build a proper active crossover. Performance of a Active Filters placed before each power amplifier will be far superior to that of the in-built speaker level crossover in the subwoofer.
It'll cost you £10, max, for the components.
Chris
It'll cost you £10, max, for the components.
Chris
Easy enough to put something in there - they're often seperate boards anyway.
In fact, the pre-amp section is likely to have some volts suitable for an op-amp. Putting at least one section (if not both, and have a sub out on the back) in the integrated amp would be a good idea to keep things tidy.
Chris
Hi,
One method is to highpass the main speakers 1st order at say 80Hz,
by decreasing the power amplifier boards input coupling capacitor.
You then modify the sub amps high level inputs or build a little box
driven at speaker level for the line inputs that has an inverse 80Hz
1st order passive boost, to bring sub drive levels back to flat, and
then use the subcontrols for final adjustment of integration.
A longer winded way of avoiding the 1st order series capacitors.
rgds, sreten.
One method is to highpass the main speakers 1st order at say 80Hz,
by decreasing the power amplifier boards input coupling capacitor.
You then modify the sub amps high level inputs or build a little box
driven at speaker level for the line inputs that has an inverse 80Hz
1st order passive boost, to bring sub drive levels back to flat, and
then use the subcontrols for final adjustment of integration.
A longer winded way of avoiding the 1st order series capacitors.
rgds, sreten.
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