250Ti - 4-way active experiment

[Dagfinn]

So, I've rigged my 2-way crossover for the passive side, biamping it using the EC AW75. Biamping is a good option, perhaps enough for many. Clearly worth it to my ears ! Easier to deal with, for sure. Before starting this I thought there were more options for crossovers, but I can't find many 4-way at all. Did a measured approach, combining pink noise and sweeps, and got a result I feel is pretty good. My levels for each driver was ok by ear, but some form of EQ is needed when including the room. The two speakers don't match exactly, as expected with this crossover. Hard to tell by listening. I'm both impressed and pleased . There's a better clarity to the lower octaves, better tonal distinction. Have to make a rear cover and connector plate, 2x speakon perhaps...

[Robh3606]

Bi-amping them is nice I built a Bi-amp Jubilee clone years ago. Used a DX-1 with custom cards I built using LEAP. I have to resurrect them at some point. I have a pair of 1400 subs with blown plate amps ready to go with them so Le-14H-3's! Originally used 121A's.

Glad you are having fun!

Rob

[Dagfinn]

Strange, I know I wrote a reply yesterday, I must have messed up... Very cool project, Rob! Bit above my level, have to admit. Regarding sub, I considered cloning a B460 or 380, but my room is just too small to fit them. Love those big woofers! I found a NOS dbx 234XL on the auction site, low price and better spec'ed than the new XS model (strange, but correct according to dbx.) A little wait, but so cheap I gave it a shot. I'm considering putting the tiny class D amps inside the baffle, reduce the clutter in the room. Not much heat coming from them. We'll see. The psychology of speaker matching is a bit challenging, specially since my ears don't match either . But, I got a decent curve in REW, I'm happy so far . I like them at a little more distance than then the Genelecs, they sound more coherent further back. Wish I had a bigger room so I could release some more of the watts . They play scary loud!

[Dagfinn]

Site crashed when posting, trying to recreate... System up and running, very happy . Loads of learning from a setup like this. They are in a room with two Genelec monitors with ABC swiitching, very helpful when fine tuning by ear. A picture of the stack: 2x Topping PA5II for tweeters and high-mid, about 125W/4Ohm, 1 Topping PA7 Plus/200w for low-mid, and a Kenwood L-1000M for woofers, about 200w. The older, cheap version of the dxb crossover seems fine, can't hear any difference .

[Dagfinn]

As you see, cabling and setup is temporary. I've decided to use 8-lead wire with Speakon 8-pole, nice and tidy . Having gain control is useful - I made a mid/tweeter connection error, but discovered it while slowly increasing gain, no harm done. But mostly it's useful for gain staging, On crossovers; I know some were made by Pioneer and Accuphase, but all(?) SE. Are there any balanced 4-way crossovers like the Pioneer D23 out there?

[Riley Casey]

While they have been out of production for years the BSS FDS360 four way crossovers have just about the best feature set for analog crossover control. IF you have a tolerance for buying used and doing the overhaul work that old units require and IF you have the patience for making electronic component changes internally that afford the option for 2nd or 4th order crossover filters and parametric EQ on each band. They still come up on Ebay with some in very clean condition and some showing signs of having lived hard lives in touring sound systems. If you are willing to go digital the Ashly Protea 4.24 C or D versions are four channel in and eight channels out and also going for low prices on Ebay.

...Are there any balanced 4-way crossovers like the Pioneer D23 out there?