Question: Kits for 4-way system - Page 2 - diyAudio
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Old 2nd August 2010, 02:58 AM   #11
minidsp is offline minidsp  Hong Kong
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In answer to your question:

- " linear phase, could you please show where this indicated in datasheet?"

Answer: filters are not linear phase. FIR would be the required implementation. (not the case here). FYI that very rarely will you find a linear phase implementation as a crossover. miniDSP is no different to 80% of products out there.
- Shipping cost question was I thought answered in an email separately (or maybe gotten you confused with somebody else from Latvia as well ?? :-) Your country was added to shopping cart. please try again.

-And how to control volume using potentiometer fot both kits at same
time? What kind potentiometer do you recommends?


Answer: Please read miniDSP manual p11. Question already answered.
You can indeed control 2 boards.

- As for your diagram. Yes, it's correct though you only need one connection to one RCA on each side (no need to double up to both RCA for each board.)
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Old 2nd August 2010, 09:22 AM   #12
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>>(or maybe gotten you confused with somebody else from Latvia as well ?? :-)

no, I'm here and are waiting for some money inbounds
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Old 2nd August 2010, 11:21 AM   #13
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Quote:
Originally Posted by minidsp View Post
Answer: filters are not linear phase. FIR would be the required implementation. (not the case here). FYI that very rarely will you find a linear phase implementation as a crossover. miniDSP is no different to 80% of products out there.
Yes, but I want create liner-phase system, it also can be called - minimal phase system. FIR will be very useful, do you plan to implement it? Most my friends want this and also they want more than 56bit... so for now they using passive in their systems. For example one of my friend, this him project - Cyclop, He interest in your kits, but with FIR and 192bit... and I'm too

Quote:
Originally Posted by minidsp View Post
- Shipping cost question was I thought answered in an email separately (or maybe gotten you confused with somebody else from Latvia as well ?? :-) Your country was added to shopping cart. please try again.
Not work for me.

Quote:
Originally Posted by minidsp View Post
- As for your diagram. Yes, it's correct though you only need one connection to one RCA on each side (no need to double up to both RCA for each board.)
Thanks
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Old 14th September 2010, 05:51 PM   #14
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Today I received minidsp kits and again I have some questions, clarifications

So regarding this diagram. I want to build stereo 4-way system
Click the image to open in full size.
1. Both jumpers must be set to master? or one master, other slave.
2. If both kits connected to PC, I can't I control them together in one time?
3. If I'm not planing use external DC, just USB cable and I want to change some options in filter(for example LR24 to BW24), and I have connected to PC two kits. First what I need to do - disconnect first and synchronize second, then connect first with disconnected second?

I just want to be sure in all this. Maybe if you've added to the documentation some diagrams and examples, so there would be no such issues and questions. I'm afraid to connect something in wrong way, the board is not so cheap.

p.s. kits arrived to me very quickly, in 4 days.
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Old 15th September 2010, 02:08 AM   #15
minidsp is offline minidsp  Hong Kong
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Hi,

Quote:
1. Both jumpers must be set to master? or one master, other slave.
Not sure what you mean since there are different Master/Slave. I'm guessing that you have 2 miniDSP, then both units are completely independent (not stacked) so both units should have the Master jumper on. (default/don't change anything!)

Quote:
2. If both kits connected to PC, I can't I control them together in one time?
Yes that's correct. This is explained in the user manual. You can only control one at a time.

Quote:
3. If I'm not planing use external DC, just USB cable and I want to change some options in filter(for example LR24 to BW24), and I have connected to PC two kits. First what I need to do - disconnect first and synchronize second, then connect first with disconnected second?
Don't complicate things too much.. it's really simple. You open your software, plug one USB to one board, synchronize and you're live to edit settings. Once you're done tuning one speaker, in 98% of cases, you will want to apply the exact same settings to the other board (unless your speaker is not the same, then you'd had greater design issues I guess). So you disconnect from the first board, plug to the second, click sync and it will flash the second board with the settings. That's it...

Please read the manual carefully and you'll see that it's really simple. You're not going to break anything...
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Old 15th September 2010, 10:21 AM   #16
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Yes, I have 2 miniDSP and building 4-way stereo system, so I have 8-channel amplifier for this. By default "master" in now. Ok, I will not change default options.
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Old 15th September 2010, 01:36 PM   #17
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And again question about "Master Volume Control". If I want control volume I can connect one potentiometer to both miniDSP. Can you please draw diagram with this connection?
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Old 15th September 2010, 02:07 PM   #18
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Just to one of the miniDSP and this will manage both kits. About diagram - look in user manual, page 11, Master Volume Control.
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Old 15th September 2010, 05:20 PM   #19
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Hm, and how other kit "will know", that I changed volume on one of them? page 11 can't help me, that's why I'm ask. I want to see a diagram.
I think documentation must be with more examples.
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Old 16th September 2010, 02:27 AM   #20
minidsp is offline minidsp  Hong Kong
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Quote:
If I want control volume I can connect one potentiometer to both miniDSP. Can you please draw diagram with this connection?
Simple: Just connect the center tap of the potentiometer (see manual diagram) to pin 12 of both miniDSP. You also need to connect ground (Pin 6) to both miniDSP.

That's it.
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