Anyone interested in a sub out board? Apparently the necessary software mods are now a possibility. What features would everyone like one to have?

Stu

Hi.

I would certainly be interested. Just an RCA (4V) output would be enough.

cu,
sven

Where would you put it if you have the digital out board installed?

Stu

Good question. I would probably put the board where the second drive would be and route the output through the mic input wires.

cu,
sven

How about a user selectable, adjustable low pass filter and volume control accessable from the empeg menus.

That's fine, but it's out of my hands. That would involve programming in the kernel or player software for which I have only the most basic knowledge. The hardware, I can do. The software is another matter.

Stu

I would love a board similar to the digital out board, so that I can keep my second drive in there.

TommyE

Yes! I'll order one!

Marius (Escort Cab + Mark II)

Count me in for one.

Dave

I'd definitely want one.

Would this have a DSP'd crossover or would it just be a fifth (or third) output?

SInce you asked for a wish-list:

I'd love to see a DSP crossover.
Possibly a seperate Bass volume/level control.

I realize that these are again probably kernel hacks but they'd be nice to see. I'd be in for one.

Yes, the plan is to have the DSP handle the crossover.

Stu

Id be interested... any (rough) estimates on cost?

Maybe $80. I don't know. All it would be is a very small single channel DAC circuit, so it wouldn't be very complicated.

Stu

well, sure, maybe someone else can step up to that job.

Well, could the preamp and DAC be fitted on your digital out board? and then you can wire it to a common phono cinch?

I think you'd have to put a stereo DAC on there (well, it'd probably cost less that way) as the centre & sub are on left & right of that stream if configured appropriately. There's something like a 4th order low pass for the sub output, and the level would all be adjustable in software - all that'd be needed is a buffer opamp to (a) protect the dac and (b) give a decent drive level.

Hugo

Yes, it would be stereo, probably a CS4334 to keep size down. The sub signal would be mono (same data on both channels) would it not be? So there would only be one channel of output and one output stage.

Stu

It would require major rework. Don't expect to see the two integrated any time soon, if ever. Count on them being separate.

Stu

hrm.. i think i woudl order one, and still get the other board, one for each empeg

Would it be hopeless to get both boards inside one Empeg without taking up HD space??

TommyE

In a word, no.

Stu

Didn't you mean "yes" (re. the double negative in the previous post)?

So it will not be hopeless??


TommyE

It is probably possible to get both boards into the Empeg simultaneously.

Stu

There will be 2 RCA out's, even though it is mono??
Just asking as my amp. has a subwoofer input which is mono, but 2 RCA's.

TommyE

The DSP outputs a centre channel and a subwoofer channel. They're the left & right on this extra I2S output which has to be enabled. So depending if you want to support the centre channel or not is if you want to add an extra output stage.

- Trevor

So the subwoofer channel has a Xover of some kind, opposed to the center which is just straight thru????

If so, it would be cool with both signals out.

TommyE

I thought that, in a car stereo, the proper configuration for a center channel speaker is to only play the difference between the left and the right channels, not the sum of the left and right channels.

Summing the two channels for a center channel would simply worsen the sound stage, whereas a difference channel would widen and improve it.