Setting Up 2 x RCF 312A's & 1 x RCF 705 Sub...

[SC Events]

Hi All,

Last week I went mad and bought a RCF 705 Sub. I already have a pair of RCF 312A's and I was wondering if anyone can give me any advice on the best way to set them up.

I've only used it once so far and I connected the output of my mixer (Denon X900) to the sub via XLR, then went out of the sub in to the 312's via XLR again.

I had the sub volume turned up to just under a 1/4 and the limiter light kept flashing - is this normal?

Also, the 3 buttons on the back, how should they be set for best effect?

Many thanks in advance! :)

[Solitaire Events Ltd]

Are you going through the high pass out or full range out? What is the crossover switch set to?

[mattydinx]

Next to the Master Balanced Outputs there's a small attenuation switch, is this on or off?

What levels are you getting on the output VDU. Not trying to tell you how to suck eggs, but is your gain set correctly on the mixer?

[SC Events]

Darren, on the sub all of the switches were out...i.e. I didn't push any of them in so they were flat.

Matty, I had my RCF 312A's set to half and the mixer was on half and the VDU was bouncing up to around the 4th row of LED's.

[Solitaire Events Ltd]

Darren, on the sub all of the switches were out...i.e. I didn't push any of them in so they were flat.



I haven't gone any switches you can push in on mine. Have you got the 705 AS?

[SC Events]

I haven't gone any switches you can push in on mine. Have you got the 705 AS?

Yes, sorry my fault. It's the RCF Sub 705 AS

[Solitaire Events Ltd]

Yes, sorry my fault. It's the RCF Sub 705 AS

Right, so what switches have you got on it then? There is a crossover switch, but you don't push it in. Maybe they've changed the design?

[WWDJ]

Pretty sure it is the same as mine

- Crossover - Yes/No
- Crossover - 80/120
- Phase - 0/180

[SC Events]

This is the back of it:

13392

[mattydinx]

I'd start with...
Volume: Set as needed for venue
Out: Xover (In)
Xover: Set to what sounds best.
Phase 0 degrees (out) unless you're seriously lacking bass then try 180 degrees.

Mixer attenuation set to 0dB (switch on the back)

Providing you keep your channel and master levels sensible on your mixer I shouldn't expect the Sub to clip until you get past the 0dB mark on the master output VDU.

[Solitaire Events Ltd]

This is the back of it:

13392

Mine must be the older type then, as it's completely different!

[WWDJ]

Mine must be the older type then, as it's completely different!

I think the actual controls are pretty similar though?

As I recall, the ART705 has another set of XLR outs depending upon whether you want to use the crossover or not.

[surround sounds]

that looks the same as the back of my rcf 905as

[Solitaire Events Ltd]

I think the actual controls are pretty similar though?

As I recall, the ART705 has another set of XLR outs depending upon whether you want to use the crossover or not.

I don't have a crossover on and off switch = you can run full range or high pass out. There are 3 positions for the crossover 80hz, 100hz and 120 hz.

It does basically the same, but is different in design.

Picture...

[paulg]

I'd second that. If you are limiting at 1/4 gain, the signal being sent to the sub is much too hot and you risk some serious damage.

The stereo set up you are using sounds right - mixer L/R to sub L/R and then and XLR from the sub outputs to the inputs on the tops.

The 3 button layout on the back of the sub is the same across the RCF mid range now, including 7, 9 and 4 pro series.

In the main, with the set up you have, subs at 11 or 12 o clock and tops set at 12 o clock should be about right. You need to look at the input signal.

It's fair to say though that the limiters on RCF's soon cut in after the signal led's are lit. That's because it's a fairly soft limiter. You can let it flash occasionally without doing any harm.

[Paul Thomas Top Banana DJ]

It's fair to say though that the limiters on RCF's soon cut in after the signal led's are lit. That's because it's a fairly soft limiter. You can let it flash occasionally without doing any harm.


Agreed, It is sort of like a beat counter.

[SC Events]

Thanks for all of your help :)

I'll set it up and see what happens...