davewantsmoore Posted September 3, 2018 Share Posted September 3, 2018 23 minutes ago, andyr said: As well as the SNR issue which Dave mentioned, there were reports a few years ago that 2x4s put a loud transient through your amps when you switched them off. Old ones do. Yes. 23 minutes ago, andyr said: I believe this issue was then solved via an update to the 'plug-in' software. Certainly my 10x10HD does not make any evil noises if I accidentally turn it off before turning the amps off. It's all models. One of my oldest 10x10s do.... which is especially problematic as I sometimes have the connected directly to compression drivers with no series capacitor :-S 23 minutes ago, andyr said: A substantial improvement on the previous setup, where a preamp fed the analogue inputs of the miniDSP unit (using the 48kHz 8x8 plug-in). One should ALWAYS feed a device like this with a strong analogue signal. Using a preamp before an A to D converter (to send it a reduced input signal) is a big no-no for performance - but you see it done/recommended quite a lot. It would be much better to send in a full analog signal, and use the internal digital volume to output the reduced volume signal. Or if needed (if that still doesn't get it there) like you're doing outputting a full sized analogue signal from the DSP, and then using a multichannel volume control. Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 Excellent discussion, thank you all. So it seems the DDRC-88A is the way to go then. Gives me FIR and I can play with Dirac and see what all the fuss is about. Any reason not to get it? In saying that, the new 2x4 model might be more advanced? Dirac aside Link to comment Share on other sites More sharing options...
Happy Posted September 3, 2018 Share Posted September 3, 2018 1 minute ago, Peter the Greek said: Excellent discussion, thank you all. So it seems the DDRC-88A is the way to go then. Gives me FIR and I can play with Dirac and see what all the fuss is about. Any reason not to get it? In saying that, the new 2x4 model might be more advanced? Dirac aside For your theatre setup right? As opposed to a stereo Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 2 minutes ago, Happy said: For your theatre setup right? As opposed to a stereo Eventually the multi channel yes. Right now just 2 x 2-way speakers and one or two subs. So I need a minimum of 5 channels Link to comment Share on other sites More sharing options...
Happy Posted September 3, 2018 Share Posted September 3, 2018 2 minutes ago, Peter the Greek said: Eventually the multi channel yes. Right now just 2 x 2-way speakers and one or two subs. So I need a minimum of 5 channels If you’re doing a multi channel stereo (ie multi way stereo speakers plus subs) then I’d recommend ddrc 22d. 88a is primarily for surround speakers i think. Link to comment Share on other sites More sharing options...
andyr Posted September 3, 2018 Share Posted September 3, 2018 36 minutes ago, Peter the Greek said: Eventually the multi channel yes. Right now just 2 x 2-way speakers and one or two subs. So I need a minimum of 5 channels Are you sure PtG? If you are actively bi-amping those 2-way speakers then, yes, you need 5 channels - or 6 if you have 2 subs. But if you are driving your 2-way speakers with a stereo amp (ie. 1 amplifier channel each speaker) ... then you only need 4x output channels, with 2 subs (so the 2x4HD gives a HP filter for each 2-way and a LP filter for each sub). Andy Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 5 minutes ago, andyr said: Are you sure PtG? If you are actively bi-amping those 2-way speakers then, yes, you need 5 channels - or 6 if you have 2 subs. But if you are driving your 2-way speakers with a stereo amp (ie. 1 amplifier channel each speaker) ... then you only need 4x output channels, with 2 subs (so the 2x4HD gives a HP filter for each 2-way and a LP filter for each sub). Andy Yep, they're fully active. 1 channel per driver so 4 for the monitors plus any subs Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 Last count I need something like 32 channels for the whole shebang. But that will be many years away....$16k of amps alone Link to comment Share on other sites More sharing options...
andyr Posted September 3, 2018 Share Posted September 3, 2018 27 minutes ago, Peter the Greek said: Yep, they're fully active. 1 channel per driver so 4 for the monitors plus any subs Aah, OK - thanks for the explanation. Andy Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 5 hours ago, Happy said: If you’re doing a multi channel stereo (ie multi way stereo speakers plus subs) then I’d recommend ddrc 22d. 88a is primarily for surround speakers i think. I should have said the system was fully active per comments with Andy, so I need something like the 4x10 or 8x8. That was my understanding at any rate. I wanted to at least have the option for FIR, so wanted to make sure it was available, otherwise I'd just get a bunch of the 2x4hd's. I figure Dirac is pretty well liked, so worth at least trying Link to comment Share on other sites More sharing options...
Happy Posted September 3, 2018 Share Posted September 3, 2018 Well my point was that you could have a minidsp plus a ddrc 22d Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 3, 2018 Share Posted September 3, 2018 Just now, Happy said: Well my point was that you could have a minidsp plus a ddrc 22d Oh right, got you. Mini dsp first for crossover and Dirac after that. They talk about that here....which is what prompted my questions https://www.minidsp.com/forum/dirac-series-support/13950-ddrc-88a-for-dirac-and-fir-linear-phase-crossover Link to comment Share on other sites More sharing options...
Guest Peter the Greek Posted September 4, 2018 Share Posted September 4, 2018 LOL, Found my wife's near 20 year old laptop. I'll be buggered, it works! No need for new dsps for a while....going to get me a usb mic though, screw stuffing around with sound cards and the like. Link to comment Share on other sites More sharing options...
OCD Posted October 6, 2018 Share Posted October 6, 2018 On 03/09/2018 at 1:15 PM, andyr said: This is the way I now run my 10x10HD. I use the (96kHz) 4x10 plug-in and feed into the digital input. The 8 analogue outputs then go into a 'RelaiXed' 8-channel, digitally-controlled, analogue volume control ... before going to the 8 amplifier channels. A substantial improvement on the previous setup, where a preamp fed the analogue inputs of the miniDSP unit (using the 48kHz 8x8 plug-in). Andy Andy, where did you get the 8 channel RelaiXed volume control from? I want to do something like this but with the DDRC-88A/BM. Cheers Mitch Link to comment Share on other sites More sharing options...
andyr Posted October 6, 2018 Share Posted October 6, 2018 4 minutes ago, Compass said: Andy, where did you get the 8 channel RelaiXed volume control from? I want to do something like this but with the DDRC-88A/BM. Cheers Mitch Hi Mitch, I'll PM you Jos's email address. Andy 1 Link to comment Share on other sites More sharing options...
MattyW Posted October 8, 2018 Share Posted October 8, 2018 Pretty sure Dayton USA make an affordable equivalent now too Link to comment Share on other sites More sharing options...
petetherock Posted November 4, 2019 Share Posted November 4, 2019 I've recently solved some major bass issues in my square room with the Mini DSP: https://peteswrite.blogspot.com/2019/11/taming-square-room-with-two-subs-rew.html 1 Link to comment Share on other sites More sharing options...
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