[Saturn94]

I found this interesting.  My apologies if already posted (I didn’t see it here).

https://www.youtube.com/watch?v=G2aRzygAOgI&list=WL&index=2

[SteveFord]

Yep, it's right around the corner.

[Stercom]

For people who don't want to sit through a 25 minute video and listen to a guy reading his script in monotone - here is the summary: Magnepan "may" offer some models without a crossover which are pre-wired for external DSP. 

[Letitroll98]

For people who don't want to sit through a 25 minute video and listen to a guy reading his script in monotone - here is the summary: Magnepan "may" offer some models without a crossover which are pre-wired for external DSP. 

Thanks you so much.  I was developing a brain seizure listening to that guy.

[SteveFord]

It "may" add another 10-20 grand to the price of a pair of 1.7i's whose price has been raised so you can negotiate to an undetermined figure with the retailer.

[FullRangeMan]

+1. 
Skillful marketing move to makeup an 1969 product and make it look updated to its captive internal US customers.

[HAL]

The Danville Signal dspNexus 2x8 DSP crossover and front end that was used for the Magnepan 1.7i is the AK4499EX DAC upgrade unit that costs $4000.00.   I use the same DSP system for my 1.7's.

I worked on the DSP crossover design for the demo system if there are any questions.

[andyr]

For people who don't want to sit through a 25 minute video and listen to a guy reading his script in monotone - here is the summary: Magnepan "may" offer some models without a crossover which are pre-wired for external DSP. 

Many thanks for enduring the vid and letting me avoid it!   

[josh358]

+1. 
Skillful marketing move to makeup an 1969 product and make it look updated to its captive internal US customers.

The Maggies of today don't look much like the Maggies of 1969 inside. For one thing, they use foil instead of wire, with a significant improvement in sound quality. For another, the 1.7/1.7i are three-way systems with a supertweeter. In any case, I'm in close touch with Wendell Diller at Magnepan, and he's genuinely excited about DSP and has pushed hard within the company for open architecture and cooperation with Danville. In fact, I was the one who first put them on to Danville, and to Wendell's delight, he already knew Al Clark, the company's CEO, from the old days. It's looking to be a fruitful collaboration.

[andyr]

I worked on the DSP crossover design for the demo system if there are any questions.

How very interesting.

Did you stick to the stock 6dB slopes ... or were you able to implement 24dB - or even 48dB - slopes that DSP can easily deal with?

[thingone62]

That is a great video - I played around with triamping my Magenpan MMG's (with subs).  I used a computer, VBAN Matrix (https://vb-audio.com/Matrix/index.htm) which allowed routing highs into the front left/right of my cheap Yamaha AVR, mids into the surround channels and lows in the the sub output.

Doing this sounded amazing (and was free).  Unfortunatly the system was not contraollable by anyone but myself so I went back to passive crossovers (no where near as good).

I used "Bass That HZ" for a crossover (runs on PC - all of the DSP happens on PC)

[HAL]

How very interesting.

Did you stick to the stock 6dB slopes ... or were you able to implement 24dB - or even 48dB - slopes that DSP can easily deal with?

For my version it is an 8 pole Linkwitz-Riley alignment DSP crossover.  There is also speaker correction for flat on-axis response.

Also added a high pass filter on the speaker for better power handling by removing out of band signals from the panels.

[josh358]

That is a great video - I played around with triamping my Magenpan MMG's (with subs).  I used a computer, VBAN Matrix (https://vb-audio.com/Matrix/index.htm) which allowed routing highs into the front left/right of my cheap Yamaha AVR, mids into the surround channels and lows in the the sub output.

Doing this sounded amazing (and was free).  Unfortunatly the system was not contraollable by anyone but myself so I went back to passive crossovers (no where near as good).

I used "Bass That HZ" for a crossover (runs on PC - all of the DSP happens on PC)

Nothing is going to beat a tri-amped system, but you can improve the passive crossover by using a higher-order one. This will increase maximum undistorted output.

[andyr]

For my version it is an 8 pole Linkwitz-Riley alignment DSP crossover.

IIR filters ... or FIR?

Also added a high pass filter on the speaker for better power handling by removing out of band signals from the panels.

Excellent idea.

[HAL]

IIR

The dspNexus 2/8 will do FIR processing, but not really used it to date.  Some customers have used IIR and FIR together.

[andyr]

IIR

Can I suggest you take the time to try FIR filters.  I've heard the difference ... and I - plus 2 friends who've tried them - think the linear phase result from FIR filters sounds better (than that from IIR filters).

[HAL]

If in linear phase you are also referencing SINC functions, I will pass.

Non-causal filters after my research and listening are why digital audio sounds digital. 

There are better sounding digital filter structures for IIR in Audio Weaver used for the dspNexus 2/8.

As an example, take an 8th order L-R high pass and low pass filter and sum the outputs.  For this system, it sounds like a direct DAC connection to the input.