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[Riley Casey]

OmniDrives were the top of the heap for DSP processors and nothing other than perhaps the Lake units come close in sound quality and flexibility.  The Blu series are a PITA to program and were not designed to fill the same market niche that the 366s were but if its a set it once and forget it then they might be a good choice.  Omnidrives show up at reasonable prices on Ebay but all of them are loosing their displays eventually ( but are accessible with the editor software ) so if you want a drop in option theres that.

[Mal Brown]

I have 4 mini drives in my rigs and have no issues with them sound quality wise...  I do need to replace one display.   My local tech can accomplish that though.

I am sort of morbidly interested in the consensus replacement answer in case of a Paradise,CA Level event in my neighborhood.  Not as far fetched for me as it might be for some...

[Duane Rodakowski]

What is a NTM filter? Never heard about that one before.

A short, well written, explanation:
https://bssaudio.com/en/whiseworks

[Mike Caldwell]

A short, well written, explanation:
https://bssaudio.com/en/whiseworks

I'm going to say that with the current DSP choices and the steeper cut off rates available you could work around not having an NTM filter choice.

[Tim Hite]

Dolby seems to think their linear phase crossover is a better option than the NTM models.

Dolby Lake Processor paper

OmniDrives were the top of the heap for DSP processors and nothing other than perhaps the Lake units come close in sound quality and flexibility.  The Blu series are a PITA to program and were not designed to fill the same market niche that the 366s were but if its a set it once and forget it then they might be a good choice.  Omnidrives show up at reasonable prices on Ebay but all of them are loosing their displays eventually ( but are accessible with the editor software ) so if you want a drop in option theres that.

[Helge A Bentsen]

A Neville Thiele Method™ filter.

Rod Elliot explains it here:

http://sound.whsites.net/articles/ntm-xover.htm

Thanks Art.

I just learned something new

[Peter Morris]

https://linea-research.co.uk/asc48/

This one can generate "Hardman crossover" which looks a bit like an NTM or an Elipical filter ...

It can also generate a 24 dB LR slope crossover but with no phase shift. It also has a 768 tap FIR filter - but the FIR filter is a bit tricky to program. 

It can also do all your "normal" IIR crossovers.

http://linea-research.co.uk/wp-content/uploads/LR%20Download%20Assets/Tech%20Docs/CrossoverFilters%20White%20Paper%20-C.pdf

[Mark Wilkinson]

https://linea-research.co.uk/asc48/

This one can generate "Hardman crossover" which looks a bit like an NTM or an Elipical filter ...

It can also generate a 24 dB LR slope crossover but with no phase shift. It also has a 768 tap FIR filter - but the FIR filter is a bit tricky to program. 

It can also do all your "normal" IIR crossovers.

http://linea-research.co.uk/wp-content/uploads/LR%20Download%20Assets/Tech%20Docs/CrossoverFilters%20White%20Paper%20-C.pdf

Hi Peter !

How do you put FIR filters in the ASC48?  Does the ASC48 have to be a hardware FIR model (as in ASC48F) ?
Or is it just a matter of putting  the FIR firmware into any existing ASC48?
(I have the Danley SC-48 and don't want to maybe brick it by trying the FIR firmware....)

When you say the filter is a bit tricky to program, do you mean because it needs an SFI file, or something else?

Thank you sir 

[Peter Morris]

Hi Peter !

How do you put FIR filters in the ASC48?  Does the ASC48 have to be a hardware FIR model (as in ASC48F) ?
Or is it just a matter of putting  the FIR firmware into any existing ASC48?
(I have the Danley SC-48 and don't want to maybe brick it by trying the FIR firmware....)

When you say the filter is a bit tricky to program, do you mean because it needs an SFI file, or something else?

Thank you sir 

Here is a quote from the manual -

FIR Filter (available on some models)

Each output supports a 768 tap Finite Impulse Response (FIR) filter which may be programmed using
a third party application, such as the Eclipse Audio FIR Designer software, and loaded via the System
Engineer application.

FIR filters may be used for equalisation, phase manipulation or for crossover filtering with linear or
arbitrary phase response.

The filter itself cannot be programmed from the front panel, but the Name of the FIR design is
shown on the display, and the action of the filter may be enabled/disabled.

[Mark Wilkinson]

Here is a quote from the manual -

FIR Filter (available on some models)

[/i]

Yep, the 'available on some models' was why I was asking.  That model availability info is lacking on their website afaict.
When you said the FIR filter is a bit tricky to program, I thought maybe you had one in hand....

[ProSoundWeb Community]