active sub filter questions

[paulspencer]

I'm looking at this subwoofer filter kit:

http://www.altronics.com.au/index.as...=item&id=K5562



I have a similar kit already in my system, however this one has an "auto power on" function, which I was going to add to my system at greater cost than this kit, for a mains slave switch kit.

* can anyone advise on modifying this kit (given a schematic) to lower the xo point (only goes as low as 60 Hz, and I'd like to have it xo at 40 Hz)?

* how does one use it to get a separate power amp to power up? Will this work for switching on any separate amp?

Previously I was going to get one of these kits:

http://www.altronics.com.au/index.as...=item&id=K6046



but it seems like the sub processor kit will do a similar job. Am I right? I understand how the mains slave trigger kit works, but not sure about auto power on ...

[JDeV]

Originally posted by paulspencer
I'm looking at this subwoofer filter kit:

http://www.altronics.com.au/index.as...=item&id=K5562

Paul,
Did you manage to find this or a similiar design?
What are you using now?

[paulspencer]

JDeV,

I currently have a similar kit which is available at Jaycar www.jaycar.com.au which is in Australia

It has a variable LP filter, a defeatable 20 Hz 3rd order rumble filter, and one band of parametric eq.

For the moment I'm happy with it. Easy to build and has the basics. Soon I'll be trying out DCX as a 3way active xo.

[richie00boy]

The filter point should be easily changeable by a couple of resistors and/or capacitors. I would hazard a guess that the relay switches the mains upon detection of signal so should work with any power amp that doesn't draw too much mains current. I'm sure the vendor can quickly and easily advise on the relay rating and confirm my thoughts.

[David Gatti]

Originally posted by paulspencer
JDeV,

I currently have a similar kit which is available at Jaycar www.jaycar.com.au which is in Australia

It has a variable LP filter, a defeatable 20 Hz 3rd order rumble filter, and one band of parametric eq.

For the moment I'm happy with it. Easy to build and has the basics. Soon I'll be trying out DCX as a 3way active xo.

Paul
Are you talking about the Behringer DCX2310?
I'm thinking about using it.
What driver are you using btw?

[paulspencer]

David,

You must mean Behringer Ultradrive - DCX 2496 - 3 way digital active xo, right?

With your speakers you might even consider Clarity Eq - more expensive but its more powerful and also has eq, and you can buy a refurbished unit for $1500ish IIRC. It has features similar to Ultradrive and Ultracurve which together at a good price well below retail go for about $1000.

DCX I'd expect to be able to get hold of for about $390, based on discount off retail I got last year. I'm looking at doing a group buy this Christmas, since as a group we can more likely get a good price. If we can get price down to $350 as a group that would be nice! There is a group buy for the US, but we really need to buy from here to get reliability, the service centre guy told me units bought overseas are notoriously unreliable here due to the power supply, even though they can be switched.

Shoot me an email if you like

[David Gatti]

OK, I just saw your website - Stryke Audio AV12.
Where did you buy it?

[JDeV]

Originally posted by paulspencer
JDeV,

I currently have a similar kit which is available at Jaycar www.jaycar.com.au which is in Australia

It has a variable LP filter, a defeatable 20 Hz 3rd order rumble filter, and one band of parametric eq.

Hi Paul,
Do you maybe have a circuit for this that I may have a look at?
I build one myself a while ago, but does not work very well anymore.

Controller

[paulspencer]

David,

I bought my subs from Stryke (now AE speakers). I purchased during pre-order so they were only $120 each USD, but after adding 5% customs and shipping, they cost $320 each, which I was happy with at the time since a Shiva would have cost only $20 less and I find this a lot more impressive than a Shiva! 23mm xmax, very nicely built, high power handling, and a stylish aluminium cone.

JD,
Here is a schematic:

[JDeV]

Originally posted by paulspencer
JD,
Here is a schematic:

Thanx Paul

Does anybody have an idee for an "auto on/of" circuit.
I tried the ESP (Rod Elliot) circuit, but not working well when I build it