#103710 - 08/07/2002 14:44
Sub Out Board?
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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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
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#103711 - 08/07/2002 15:15
Re: Sub Out Board?
[Re: maczrool]
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old hand
Registered: 30/07/2000
Posts: 879
Loc: Germany (Ruhrgebiet)
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Hi.
I would certainly be interested. Just an RCA (4V) output would be enough.
cu,
sven
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proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord
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#103712 - 08/07/2002 15:17
Re: Sub Out Board?
[Re: smu]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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Where would you put it if you have the digital out board installed?
Stu
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#103713 - 08/07/2002 18:35
Re: Sub Out Board?
[Re: maczrool]
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old hand
Registered: 30/07/2000
Posts: 879
Loc: Germany (Ruhrgebiet)
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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
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proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord
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#103714 - 08/07/2002 19:02
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 345
Loc: New Jersey, USA
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How about a user selectable, adjustable low pass filter and volume control accessable from the empeg menus.
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-CHiP
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#103715 - 08/07/2002 20:46
Re: Sub Out Board?
[Re: CHiP]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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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
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#103716 - 09/07/2002 00:22
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 356
Loc: NORWAY
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I would love a board similar to the digital out board, so that I can keep my second drive in there.
TommyE
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#103717 - 09/07/2002 00:49
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 10/10/2000
Posts: 350
Loc: Copenhagen SW, Denmark
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Yes! I'll order one!
Marius (Escort Cab + Mark II)
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#103718 - 09/07/2002 03:14
Re: Sub Out Board?
[Re: maczrool]
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member
Registered: 17/12/2001
Posts: 194
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Count me in for one.
Dave
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Dave
MK2 12Gb MK2a 60Gb
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#103719 - 09/07/2002 06:32
Re: Sub Out Board?
[Re: DBALKUNJR]
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journeyman
Registered: 09/03/2002
Posts: 62
Loc: MA
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#103720 - 09/07/2002 06:40
Re: Sub Out Board?
[Re: maczrool]
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carpal tunnel
Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
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Would this have a DSP'd crossover or would it just be a fifth (or third) output?
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Bitt Faulk
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#103721 - 09/07/2002 07:20
Re: Sub Out Board?
[Re: maczrool]
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member
Registered: 15/01/2002
Posts: 183
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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.
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CLS
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#103722 - 09/07/2002 08:44
Re: Sub Out Board?
[Re: wfaulk]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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Yes, the plan is to have the DSP handle the crossover.
Stu
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#103723 - 09/07/2002 08:52
Re: Sub Out Board?
[Re: maczrool]
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member
Registered: 02/04/2002
Posts: 148
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Id be interested... any (rough) estimates on cost?
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Empeg Mk2a 60G
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#103724 - 09/07/2002 09:05
Re: Sub Out Board?
[Re: jbrinkerhoff]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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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
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#103725 - 09/07/2002 09:19
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 345
Loc: New Jersey, USA
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well, sure, maybe someone else can step up to that job.
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-CHiP
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#103726 - 09/07/2002 09:23
Re: Sub Out Board?
[Re: CHiP]
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journeyman
Registered: 22/06/2002
Posts: 92
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Well, could the preamp and DAC be fitted on your digital out board? and then you can wire it to a common phono cinch?
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#103727 - 09/07/2002 09:33
Re: Sub Out Board?
[Re: maczrool]
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carpal tunnel
Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
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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
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#103728 - 09/07/2002 10:06
Re: Sub Out Board?
[Re: altman]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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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
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#103729 - 09/07/2002 10:10
Re: Sub Out Board?
[Re: ilDuce]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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It would require major rework. Don't expect to see the two integrated any time soon, if ever. Count on them being separate.
Stu
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#103730 - 09/07/2002 12:25
Re: Sub Out Board?
[Re: maczrool]
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old hand
Registered: 31/12/2001
Posts: 1109
Loc: Petaluma, CA
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hrm.. i think i woudl order one, and still get the other board, one for each empeg
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Justin Larsen
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#103731 - 09/07/2002 16:31
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 356
Loc: NORWAY
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Would it be hopeless to get both boards inside one Empeg without taking up HD space??
TommyE
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#103732 - 09/07/2002 16:35
Re: Sub Out Board?
[Re: TommyE]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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In a word, no.
Stu
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If you want it to break, buy Sony!
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#103733 - 09/07/2002 16:40
Re: Sub Out Board?
[Re: maczrool]
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old hand
Registered: 16/02/2002
Posts: 867
Loc: Oxford, UK
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Didn't you mean "yes" (re. the double negative in the previous post)?
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#103734 - 09/07/2002 16:41
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 356
Loc: NORWAY
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So it will not be hopeless??
TommyE
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#103735 - 09/07/2002 16:49
Re: Sub Out Board?
[Re: AndrewT]
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pooh-bah
Registered: 13/01/2002
Posts: 1649
Loc: Louisiana, USA
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It is probably possible to get both boards into the Empeg simultaneously.
Stu
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If you want it to break, buy Sony!
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#103736 - 09/07/2002 17:04
Re: Sub Out Board?
[Re: maczrool]
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enthusiast
Registered: 08/06/1999
Posts: 356
Loc: NORWAY
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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
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#103737 - 09/07/2002 17:06
Re: Sub Out Board?
[Re: maczrool]
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carpal tunnel
Registered: 24/12/2001
Posts: 5528
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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
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#103738 - 09/07/2002 17:22
Re: Sub Out Board?
[Re: tman]
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enthusiast
Registered: 08/06/1999
Posts: 356
Loc: NORWAY
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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
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#103739 - 09/07/2002 17:31
Re: Sub Out Board?
[Re: tman]
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carpal tunnel
Registered: 20/12/1999
Posts: 31594
Loc: Seattle, WA
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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.
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