[Rick Craig]

DSP speakers with Hypex modules? 

[srb]

Sure, why not?

[pslate]

Sounds very promising Rick 

[aevans]

I was thinking just this while looking over the Hypex plate amps. I'm kind of curious to see if you could pull off your DEQX magic with those plate amps. Also, no interconnects, just digital into both channels. It could be very pretty indeed. If you can pull it off I would be interested in an upgrade of the Mejors to a full active setup using the Hypex system.

[Rick Craig]

I was thinking just this while looking over the Hypex plate amps. I'm kind of curious to see if you could pull off your DEQX magic with those plate amps. Also, no interconnects, just digital into both channels. It could be very pretty indeed. If you can pull it off I would be interested in an upgrade of the Mejors to a full active setup using the Hypex system.

I have a few different ideas and think this is a great solution for truly high-end performance at a reasonable cost. As more audiophiles embrace the active / DSP approach we'll see true gains in performance. Much of "high-end" audio is going nowhere because of backward thinking.

[jtwrace]

Much of "high-end" audio is going nowhere because of backward thinking.

Yes, but I wouldn't limit it to lack of DSP. 

[Rick Craig]

Yes, but I wouldn't limit it to lack of DSP. 

Too much is focused on things that make little or no difference in sound quality.

[jtwrace]

Too much is focused on things that make little or no difference in sound quality.

Yep

[Rick Craig]

One idea I have is a hybrid passive/DSP with a KEF  Q100 concentric driver and a 7" or 8" woofer. Similar to the Soundfield design but with no extra amplification needed, more refined mids, and better driver integration. Thoughts?

[tkp]

I think it would be a great product if the solution can be implement simple enough that typical consumer can use it without going through lengthly process for calibration.  I love the idea of not having a passive crossover inside the speaker for the potential of much better sound but had reverted back to passive amping in the past due to the following issues that I ran into:

a)  Active ampling without proper calibration to compensate for things such as BSC could result in inferior sound.  I tried this many years ago with the nOrh Multiamp and reverted back to passive amping after 3 months.

b)  With the amplification is now embedded inside the speaker cabinet, I am concerned with the cabinet vibration with could affect the amp reliability in the long run.

c)  Intergrating the amp with the speaker also restrict the ability to upgrade to better amp. as time goes on.

d)  Calibration complication will also limit the usage especially over time since I tend to forget the proper steps to set the system up correctly at much later time.

The above are my initial thought and not neccessary apply to what you have in mind.

[ricardojoa]

One idea I have is a hybrid passive/DSP with a KEF  Q100 concentric driver and a 7" or 8" woofer. Similar to the Soundfield design but with no extra amplification needed, more refined mids, and better driver integration. Thoughts?

assuming that the end user knows what he is dealing with the dsp.
I think a member uin AH had problem with the kef cocentric driver, where the edges are tearing apart from the cone or something like that.

[Rick Craig]

I think it would be a great product if the solution can be implement simple enough that typical consumer can use it without going through lengthly process for calibration.  I love the idea of not having a passive crossover inside the speaker for the potential of much better sound but had reverted back to passive amping in the past due to the following issues that I ran into:

a)  Active ampling without proper calibration to compensate for things such as BSC could result in inferior sound.  I tried this many years ago with the nOrh Multiamp and reverted back to passive amping after 3 months.

b)  With the amplification is now embedded inside the speaker cabinet, I am concerned with the cabinet vibration with could affect the amp reliability in the long run.

c)  Intergrating the amp with the speaker also restrict the ability to upgrade to better amp. as time goes on.

d)  Calibration complication will also limit the usage especially over time since I tend to forget the proper steps to set the system up correctly at much later time.

The above are my initial thought and not neccessary apply to what you have in mind.

All of the DSP would be preset so that it's plug-and-play. The amps could be outboard; however, with a good cabinet design I've had no problems placing them in the speaker. I realize that some will pefer their own amps but I believe the advantages of a fully active speaker outweigh this approach. If you use your own amplification then the DEQX is what I would suggest.

[Rick Craig]

assuming that the end user knows what he is dealing with the dsp.
I think a member uin AH had problem with the kef cocentric driver, where the edges are tearing apart from the cone or something like that.

As noted in another post all of the DSP can be loaded here before the speaker ships so it makes it easy for the end user. Can you point to a post on the KEF driver problem? That would be an excursion issue which indicates no high pass filter on the woofer portion on the concentric driver. With my proposed design that wouldn't be an issue since the concentric would be relieved of the lower bass range.

[ricardojoa]

As noted in another post all of the DSP can be loaded here before the speaker ships so it makes it easy for the end user. Can you point to a post on the KEF driver problem? That would be an excursion issue which indicates no high pass filter on the woofer portion on the concentric driver. With my proposed design that wouldn't be an issue since the concentric would be relieved of the lower bass range.

http://forums.audioholics.com/forums/loudspeakers/82396-kef-uni-q-de-bonding-issues.html

[Rick Craig]

http://forums.audioholics.com/forums/loudspeakers/82396-kef-uni-q-de-bonding-issues.html

I see - not a surround issue. Looks like that was a simple mounting problem and not the driver itself.

[ricardojoa]

I see - not a surround issue. Looks like that was a simple mounting problem and not the driver itself.

If this could be done for what you are suggesting(cocentric with a woofer), ill assume that it could be done with any of your current speakers?
I would also assume that this could work with a tube preamp, right?

[tkp]

As noted in another post all of the DSP can be loaded here before the speaker ships so it makes it easy for the end user. Can you point to a post on the KEF driver problem? That would be an excursion issue which indicates no high pass filter on the woofer portion on the concentric driver. With my proposed design that wouldn't be an issue since the concentric would be relieved of the lower bass range.

I think if you can provide a number of DSP settings which allow seemless integration with or without an external subwoofer for full range sound or use as stand alone monitor then this can be attractive.  Maybe a DSP/amp module with a subwoofer output to drive the amp of the external subwoofer allowing the subwoofer to integrate seamlessly with the bookshelf.

One of the toughest thing I found over time is to achieve seamless full range sound with sub/bookshelf combo.  Since I don't have any test equipment, I have to use my ear to blend the two together and it has not been that great. 

I have entertained the idea of using an external an active crossover but decided not to because of all the complication in wiring plus extra amplification.  The DSP/amp module idea/proposal would simplify this significantly.

[navin]

One idea I have is a hybrid passive/DSP with a KEF  Q100 concentric driver and a 7" or 8" woofer. Similar to the Soundfield design but with no extra amplification needed, more refined mids, and better driver integration. Thoughts?

Seas Concentric anyone?
Coax
http://www.seas.no/index.php?option=com_content&task=view&id=234&Itemid=221
+ 2 16cm woofers
http://www.seas.no/index.php?option=com_content&task=view&id=66&Itemid=90

You could go LCR like this
http://tannoy.com/Residentialsummary.aspx#&&fwY29wNxut1lnOsaXIC+xtrEzV8B3BBdxYer7UAXBM6/77TL5ykdCVNvdVXaEm2OmGtpaVitfhHhlV+fOWknW0adSC50DN4p6Y51TSOPWHVvvjQI2X1HvPQQqB9NFteXaZ3U7L4a9lKj1nZHFKwE8fZiVquyEbaH6CeNTkWMSEiwsxXSUa9aqLE5UJphtVHJHLAel5a0Pgi/N76ya65Nhw==

For those who crave more bass the Concentric XL using 22cm woofers instead.
http://www.seas.no/index.php?option=com_content&task=view&id=71&Itemid=95

[ricardojoa]

I think it would be a great product if the solution can be implement simple enough that typical consumer can use it without going through lengthly process for calibration.  I love the idea of not having a passive crossover inside the speaker for the potential of much better sound but had reverted back to passive amping in the past due to the following issues that I ran into:

a)  Active ampling without proper calibration to compensate for things such as BSC could result in inferior sound.  I tried this many years ago with the nOrh Multiamp and reverted back to passive amping after 3 months.

b)  With the amplification is now embedded inside the speaker cabinet, I am concerned with the cabinet vibration with could affect the amp reliability in the long run.

c)  Intergrating the amp with the speaker also restrict the ability to upgrade to better amp. as time goes on.

d)  Calibration complication will also limit the usage especially over time since I tend to forget the proper steps to set the system up correctly at much later time.

The above are my initial thought and not neccessary apply to what you have in mind.

I think it might able to have a preset dsp function to sub if. certain prequirements are met, such as placement and crossover roll off.

[aevans]

Any thoughts on the BG RD50 or BG RD75 big planar ribbons with DSP, and a passive xover to a peerless xxls sub.. From what I understand the BG ribbons can sound very good with driver correction, and having the dispersion pattern of a long ribbon at such a low price point is very enticing.

I'm thinking 20-22" tall enclosure for the sub, with the 50 inch ribbon on top of that, putting the center of the ribbon at ear height when sitting and still tall enough so that when you stand there is no tonal difference.

I don't have any experience with these drivers, have you had any run-ins with them over the years, what is your impression?