Behringer DCX2496 -- dc power supply - Page 5

scott_fx · 09-18-2007, 11:45 PM

Quote: Originally Posted by envisionelec

Sure, if you can get 9V in (at 0dB)! I've not yet seen a headunit that can do this (no matter what the screen printing on the faceplate says).

Hi Volt heads are great if you need them. Problem is - 2V heads work just fine if your downstream equipment is any good.

sorry to ask so many questions; but say we're going s/pdif into the behringer... what's the output voltage? I'm not overly worried about it since my amps have balanced inputs so induced noise is less of an issue for me, but it would be good to know

envisionelec · 09-18-2007, 11:45 PM

Quote: Originally Posted by RedGTiVR6

head unit...what's that?

Ah geez. Right. That's like talking about Jesus in a Buddist temple. Or the Browns in Cincinnati. Whoops.

So, you guys could help me with the in car computer stuff? My closest connection for this was building a, "biscuit PC" power supply (before they were plentiful) back in 1998 for my brother's MP3 player he built for his ride. His rig of a power inverter was unreliable and he always forgot to turn it off. I built the supply on a piece of perfboard and rewound the transformer from an old car amp. It was a little electrically noisy, but worked fine.

He then bought the indash eMPEG Rio(?). I think he still uses that...

RedGTiVR6 · 09-18-2007, 11:51 PM

heh - yeah - we might be able to help with that...lol

envisionelec · 09-18-2007, 11:54 PM

Quote: Originally Posted by scott_fx

sorry to ask so many questions; but say we're going s/pdif into the behringer... what's the output voltage? I'm not overly worried about it since my amps have balanced inputs so induced noise is less of an issue for me, but it would be good to know

Uh, that would be as high as you want. To around 9VRMS before clipping. Way overkill if you ask me.

Quote:

on a different note...you will only have the voltage out that you put in...so say I go with the Hippo HiFi USB DAC...which only has something like .5v output...means I'll only have .5v out to of the Behringer to the amps, correct?

If your amp can accept a 0.5V input with acceptably low noise, then there is no problem. You can increase output gain of the Behringer somewhat, but at the expense of noise. I'd build (or buy) a high end preamp before the Behringer is there was a significant problem.
It's only 0.5VRMS Max? That is lower than line-level.

envisionelec · 09-18-2007, 11:56 PM

Quote: Originally Posted by RedGTiVR6

heh - yeah - we might be able to help with that...lol

Good, because I'm a computer genius. Right.

scott_fx · 09-18-2007, 11:59 PM

meaning that this is a car computer site... no head units

edit..woops sloooowww on the draw on this one!

RedGTiVR6 · 09-19-2007, 12:02 AM

well, a quick search tells me it's actually 4.1v but I'm double checking that right now.

scott_fx · 09-19-2007, 12:09 AM

Quote: Originally Posted by envisionelec

Uh, that would be as high as you want. To around 9VRMS before clipping. Way overkill if you ask me.

If your amp can accept a 0.5V input with acceptably low noise, then there is no problem. You can increase output gain of the Behringer somewhat, but at the expense of noise. I'd build (or buy) a high end preamp before the Behringer is there was a significant problem.
It's only 0.5VRMS Max? That is lower than line-level.

hmm.. well what is the best way to figure out the best out how to set your gains. do you set the behringer close to 9v but not clipping and set the amp's gain low, or do we set the behringer low and turn the amps gain up?

RedGTiVR6 · 09-19-2007, 12:16 AM

I would set it to where you can set the amps at the lowest gain. This will allow the amps to run most efficiently.

scott_fx · 09-19-2007, 12:32 AM

Quote: Originally Posted by RedGTiVR6

I would set it to where you can set the amps at the lowest gain. This will allow the amps to run most efficiently.

I would agree with you but i'm just wondering if the gaining at the amp would be cleaner since the amp is built to much higher standards then the dcx (i am assuming here)

i guess i'll just have to test it

RedGTiVR6 · 09-19-2007, 07:59 AM

hey scott - do you think you might be able to get some pictures with measurements of the boards in the Behringer by chance?

durwood · 09-19-2007, 10:01 AM

I know it's less than ideal, but at least it's easy. If you plan on using the DAC, why not just use a simple 2 channel attenuator for volume on the output of the dac going into the behringer units?

Dave Navone and I think PAC makes a simple one.

PAC LC1

David Navone N-22V

Dammit. Now I'm wanting to use the behringer units but one is affordable 2 makes it less affordable for me

RedGTiVR6 · 09-19-2007, 10:08 AM

Are you referring to the N-22V?

It's an option, I just need to be sure it's going to be linear enough...

One concern I have is that it needs to be connected between the HU and the amplifier...don't know why it wouldn't work between HU and processor? I'd also need to change from RCA to XLR to go into the processor.

durwood · 09-19-2007, 10:19 AM

Quote: Originally Posted by RedGTiVR6

Are you referring to the N-22V?

It's an option, I just need to be sure it's going to be linear enough...

One concern I have is that it needs to be connected between the HU and the amplifier...don't know why it wouldn't work between HU and processor? I'd also need to change from RCA to XLR to go into the processor.

yep that's what I meant (fixed)

I don't see why it wouldn't work. I guess it's cheap enough to try out. Ideally it's not int he optimal location (should be at the end of the chain, but at least it's an option.

RedGTiVR6 · 09-19-2007, 10:45 AM

it's def an option!