Do active speakers interest you? Also, let's talk directivity


Hey all. Don't think I've ever made a thread here. This is a super interesting community for me. I'm an audio professional, a mastering engineer and music educator. I'm someone who differs from much of the pro community, in that I don't see a difference between "pro" systems and "high-end" systems. 

There is one way they often differ, and that is in terms of directivity. Home systems are more frequently omni, while and studio or live sound requires directivity.

This was definitely the case in the 70s, back when audiophiles still had parties :D 

It's very hard to set up a directional system to fill a large room evenly unless you use a line array.

But let's be honest. Aren't we mostly sitting and listening, and hoping for a good image? We aren't expecting every spot in a big room to sound exactly the same for every guest. Personally, my social life is 95% virtual now and I am generally listening in my mastering room. I have a high end system in every room in my house, but my wife uses the living room system more than me (and she has better taste in music, so it's nice to learn about some new artists when she decides to put something on from he collection).

Anyway, I'm designing an active system. Though the cabinet is not large, with a combination of Hoge's principles and active electronics, we will achieve accurate response through to 20hz.

The reason to choose an active crossover is very obvious. Sending power directly to each driver allows us to use a very low sensitivity woofer, which thus plays much deeper than expected. We are using a ported woofer and a sealed midrange/hi cabinet, which are not sold separately. An interesting feature is the the very low-crossed ribbon tweeter carrying all of the high midrange and treble

It's an 1800w system, aimed at both the professional and home market. I'm curious, does this sound interesting to anyone? We are intending to have a prototype ready by 2022, so it is a ways off.

Part of the directivity concept is also dealing with room issues. Cancelling the rear energy of the woofers can help. I am inspired by Bruno and Merjin (whatever  his name :P). a big part of our concept has to do with advanced acoustic materials, which I don't want to discuss too much, as I don't think anyone else has thought of it or connected with that maker, yet

Curious to hear people's thoughts!
128x128mehtayoungs
B&W had an active speaker based on their DM 14/1400, the Active 1.  It sounded a bit better than my Phase Linear 400 on my stacked 14's and 1400's, but newer amps are better.  Currently, B&W has the 25 year old actual Nautilus four way speakers (not the numbered ones) still available.  It is functionally an active system (requiring eight channels of 350 wpc) because the B&W supplied crossover is between the preamps and amps.  I have not heard anything that I would swear sounds better.  I do believe this works better than speaker crossovers, and is noticeably more efficient.
I like the idea of active speakers with the amplifiers and active crossover not inside the speaker enclosure, it seems like a better idea because you could isolate the vibrations better. A passive crossover can also be used in a line level position.
I am using the el-cheapo Behringer DCX and DEQ (and cannot report any sonic inferiority, there is even a firmware patch for the audiophiles ;-) and since I wanted to toss some extra money at the task , the dbx venu360. 

Reason...I am constantly building speakers, no need for it, just pure ideas and fun.

Passive crossover do cost money if you want quality and higher order.

While that is offset by the need for 2nd and xrd amp once you have it (active xover and enough amps) it can't be beaten for flexibility. E.g. how is dialling back mid- level versus soldering in resistors? Or switching to a different xover type or order with a couple clicks vs. a lot of different value parts to be soldered/switched out? Same for time alignment, phase inversion at xover (actually that one is damn easy, but still soldering)..the list of plus(es) is long. 

Try to grab your input in the digital domain (CD dig out, SPDIF or AES/EBU from devices like the Raspberry pi). It works with sampling analogue, but I cannot see a benefit.

Cheers
brxl
The bitch about being a middle class audiophile is saving for a pair of dream speakers you heard at a shop or show bringing them home to have them sound awful. It’s happened to me more than once. Dsp active speakers, digital xovers, controlled directivity, time aligned bass and self powered. Whats not to like?