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-   -   Hi-end DSP based multi-channel integrated Preamp/Crossover/DAC project (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project.html)

Tranquility Bass 21st September 2019 01:06 AM

Hi Sjef

Sorry if I missed your email as I try and reply to all mails. The PC I use to retrieve and send mails has been out of action for the last 2 months because it refuses to boot up so I have had to redirected the mail server to a another email client so I may have missed some mails in the process. Also check your spam bin to see if there are any emails from me.

Pricing for the new preamp will be released with the pre-order as we are still finalizing the design with an upgrade to the unbalanced output board which eliminates ground loops when using a multitude of different amps each with their own grounding arrangements.

I will email you some info.

cheers
david

soundchaser 21st September 2019 11:46 AM

Quote:

Originally Posted by deepboy (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5920322.html#post5920322)
Preamp with built in phono stage + builtin 3 /4 way active crossover. Is this possible? Does it require a second unit to link to?

Thanks

Nope; all in one if you buy the options (the phono stage was an option) but the 4-way crossover capability is always there. There is another option for balanced vs. un-balanced outputs. DSP Concepts Audio Weaver software is used to design the crossover/equalizer response that is implemented. Then you upload it to the unit and go.

The newest one of these units (upcoming) however can be connected to an external processor (digitally) for more DSP number crunching capability. That would allow for more complex crossovers such as high resolution FIR filters with arbitrary phase vs. frequency response.

deepboy 21st September 2019 01:49 PM

Quote:

Originally Posted by soundchaser (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5921153.html#post5921153)
Nope; all in one if you buy the options (the phono stage was an option) but the 4-way crossover capability is always there. There is another option for balanced vs. un-balanced outputs. DSP Concepts Audio Weaver software is used to design the crossover/equalizer response that is implemented. Then you upload it to the unit and go.

The newest one of these units (upcoming) however can be connected to an external processor (digitally) for more DSP number crunching capability. That would allow for more complex crossovers such as high resolution FIR filters with arbitrary phase vs. frequency response.

not sure yet. i did think for the first preamp version that phono was an optional input, and that the riia eq made by the processor was not possible while using digital crossover feature. am i wrong? what about new UP versions?
Thanks

Tranquility Bass 22nd September 2019 01:39 AM

Quote:

Originally Posted by deepboy (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5921211.html#post5921211)
not sure yet. i did think for the first preamp version that phono was an optional input, and that the riia eq made by the processor was not possible while using digital crossover feature. am i wrong? what about new UP versions?
Thanks

Moving magnet phono input is available as standard on all preamp modes. The DSP handles the inverse RIAA and this operates transparently to other custom DSP functionality.

cheers
david

soundchaser 22nd September 2019 04:11 PM

Quote:

Originally Posted by Tranquility Bass (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5921599.html#post5921599)
Moving magnet phono input is available as standard on all preamp modes. The DSP handles the inverse RIAA and this operates transparently to other custom DSP functionality.

cheers
david

That was what I though but wasn't 100 percent sure but the alternative didn't make sense either (that phono input precluded crossover operation).

NATDBERG 25th September 2019 09:18 AM

Quote:

Originally Posted by Sjef (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5920829.html#post5920829)

My comment on loosing interest and confidence comes from the fact that I did not get any response on my email with the same question, an indication of the price.

I know it's Vendor's Bazaar over here, but it's still a DIY forum. Essentially Mr Traquility Bass is DIYing, albeit more professionally than many of us might.

Therefore I'm not too sure if bringing a customer service kind of issue/attitude one normally associates with a large company with staff into this is really appropriate, no matter how David wants to present himself now, on this forum, in advance of a full commercial product release.

mickiboi007 25th September 2019 10:58 AM

David will be taking Pre Orders soon. As you can imagine, the preamp is a massive undertaking for one guy. Software, hardware, metalwork, pc boards, assembly, testing etc. David is one guy working as hard as he can. The preamp will be well worth the wait. Please be patient. It is still way ahead of anything else available on the market. DEQX can't hold a candle to it. MiniDSP isn't even on the same planet as it.

jameshillj 25th September 2019 11:52 AM

Will there be some way to actually listen to one of these here in Melbourne?

Tranquility Bass 25th September 2019 12:47 PM

Quote:

Originally Posted by NATDBERG (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5924812.html#post5924812)
I know it's Vendor's Bazaar over here, but it's still a DIY forum. Essentially Mr Traquility Bass is DIYing, albeit more professionally than many of us might.

Therefore I'm not too sure if bringing a customer service kind of issue/attitude one normally associates with a large company with staff into this is really appropriate, no matter how David wants to present himself now, on this forum, in advance of a full commercial product release.

Which is why I will be running the pre-order like a crowd source funded campaign with certain funding goals. There are quite a few boards that have to be made and I won't be sending them all off to the board loader at once. I will start with the simpler boards first and make sure these have been loaded correctly before I go onto the next set of boards etc. Of course the DSP board will be last to be loaded and there are still a lot of through whole components such as leaded audio grade capacitors and connectors to be hand soldered by myself. So things will take longer compared to if it was done by a bigger commercial enterprise who probably does most things in house but in the end the aim is to be offering something that is good enough to stand aside the very expensive gear you see at Munich hi-end etc but without their price tags of course ;)

cheers
david

Tranquility Bass 25th September 2019 12:52 PM

Quote:

Originally Posted by jameshillj (https://www.diyaudio.com/forums/vendor-s-bazaar/264743-hi-dsp-based-multi-channel-integrated-preamp-crossover-dac-project-post5924921.html#post5924921)
Will there be some way to actually listen to one of these here in Melbourne?

Since I am located in Melbourne too this should be easy to arrange or I could leave a preamp with you so you could evaluate it with your own equipment. Since the preamp doubles as a standalone stereo DAC or preamp it's easy to evaluate it with conventional passive speaker setup etc.

cheers
david


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