Phoenix Gold Phorum

Some of the older equalizers and crossovers use an RNET to set the crossover frequency, rather than a pot. These RNETs are idiot proof, and typically much more accurate than using a pot. However, most people don't know where to get them. Thanks to LeggoMyEggo and VW337 for this table, which will help you order them:

that sucks that there is such a jump in frequnecys at such an important range

57 to 85. nothing in between

Good point. I'm sure you can get RNETs for those frequencies... Wonder if we can get a P/N for them.

You would have to make your own for those since resistors take a jump at that frequency as reflected by the 330K-220K. If you make your own you could add a few resistors in series to get an exact value.

Or just buy two chips, bend the legs so they would sit vertical instead of horizontal and then solder their legs to each other.....................

I used 300K resistors and made my own, ended up with 63Hz

I have a table which does the conversion for u ,

if u want give me a mail addy , I will mail it

Heres what I got the other day using the math from the EQ-215 pdf


50Hz = 376.0 Kohm resistors times 7 pieces
55Hz = 341.8 Kohm
60Hz = 313.3 Kohm
65Hz = 289.2 Kohm
70Hz = 268.5 Kohm
75Hz = 250.6 Kohm
80Hz = 235.0 Kohm
85Hz = 221.2 Kohm
90Hz = 208.0 Kohm
95Hz = 197.8 Kohm
100Hz =188 Kohm
110Hz = 170.0 Kohm Installed


18800 divided by crossover frequency = resistance in Kilo- ohms

Unless my 8th grade math was incorrect somewhere or my scientific calculator was flaking on me this is what I got.

R-nets are standardized to the 5 and 10% tolerance chart and therefore only come in standard range values like single resisters do. Some of those numbers ran 32 digits in resolution, I narrowed them to the nearest tenth of a ohm for brevity.

Here's a list of all the 14 pins:
http://www.mouser.com/search/refine.asp ... 1-mdp-1403

And 16 pins:
http://www.mouser.com/search/refine.asp ... 1-mdp-1603

Unfortunately it doesn't look like they have any that aren't listed in the chart above. Using 1moreamp's perfect math, you could probably build your own however.

aahh.. I don't know about perfect I had to use a calculator

Ok, well now I know how to order them... but how do I decide what frequencies I want? Since it's not just a knob, I need to know I have the "right" ones or simply buy a lot and play with them.

I was thinking around 75Hz was a good place for both my HP and LP but I'm not sure...

fuzzysnuggleduck wrote:simply buy a lot and play with them.

Just buy a bunch, and do some trial and error.

Your mids already roll off naturally down low due to the small enclosures, so just focus on what frequency sounds best for your subs.

Can anyone confirm if this:

http://www.mouser.com/search/ProductDet ... 14R-1-270K

is a compatible RNET? It's a 14 pin DIP, as the manual states for my AX204A but I don't want to buy it, wait for it and have it be the wrong item.

The reason I'm looking at this one is that it's 270K Ohm so that should put me right arouhd 70Hz which will be great for my components and hopefully also my subs.

Radio shack sells DIP packages with lil gripper hands that make it easy to solder R's into. Then you can go and buy 1% R's in damn near any value and stick em in to your hearts content. Just don't be a dork with the soldering iron and it'll look good and do just fine.

Yeah, that does sound like a good solution. The only problem is Radio Shack turned into "The Source by Circuit City" in Canada and they suck a fat nut. They still carry those kinds of items but their stock is limited. I'll go check them out anyways.

Thanks.

There's still a real Radio Shack in Deerfoot outlet mall AFAIK...

Ok, so The Source CC sucks and doesn't have what I need besides the actual resistors... and even then their stock was limited.

I'm going to check out the real Radio Shack in Deerfoot Outlet Mall today and hopefully pick up a couple of the 14 pin "Retention Contacts" and some resistors.

OK guys just for you I now stock precision resistor sets for making R-nets. These are 1% metal film Mil Spec resistors, 1/4 and 1/8 watt. Here is the current list of available frequency's....

317.0 K-ohm = 59.3 Hertz
287.0 K-ohm = 65.5 Hertz
267.0 K-ohm = 70.4 Hertz
249.0 K-ohm = 75.5 Hertz
235.0 K-ohm = 80.0 Hertz<these are two 470k-ohm paralleled for exactness
221.0 K-ohm = 85.0 Hertz
210.0 K-ohm = 89.0 Hertz
200.0 K-ohm = 94.0 Hertz
187.0 K-ohm = 100.53 Hertz


There will be more coming from my local supplier < I missed 50 and 55 hertz this time around>. I will be assembling range kits with parts carriers if anybody wants a complete set of sub crossover R-nets, or just wants a precise frequency LMK....C

Here is a cool site for determining resistor values:

http://www.dannyg.com/examples/res2/resistor.htm

Here is an example of the R-Nets I made as well as one of many that Chris from PG sent me au gratis a few years back by simply asking. I use R-Nets in a 406A XO. I also use them in an AC Epicenter.

I purchased the modules and resistors from Active Electronics, a national supply house here in Canada.

http://www.active-tech.ca/b2c/redirect.cfm?pn=2

does anyone have a couple 75hz modules? or can make me some, me paying.

Hello this is my first post on the PG forum.
I just bought a second hand (as good as new) EQ215X but he has a 90Hz RNET module which is a litle bit to high for me.
Here in Belgium i can onley find the 1/4 Watt 1% metal film resitors will they work or do i need the 1/8 Watt 1% resistors.
I'm planning to use the 240Kohm resitor to become +-78Hz.


Mudder;

Mudder, welcome to the Phorum

You should be able to buy the parts through http://be.mouser.com/

Ok thanks.

I am trying to just buy the modules so I can solder in my own resistors, I have a mouser catalogue in front of me, but what do you actually call them, I can't find them short of going through page by page

gfunk_nz wrote:I am trying to just buy the modules so I can solder in my own resistors, I have a mouser catalogue in front of me, but what do you actually call them, I can't find them short of going through page by page

On their site it's under the category

Passive Components » Resistors » Resistor Networks & Arrays

Hope that helps.

Hi you guys. I know this is a really old tread, but I'm looking for the modules to make on your own, but i think I'm dumb and blind, i can't find them anywhere, Help please

Anyone that can point me in the right direction