Chi-Fi Active Crossover?

[VinylGroove]

Thoughts on this Active Crossover on Aliexpress? They say they're Linkwitz-Riley filters, which I've read some other great crossovers like Marchand are. http://www.marchandelec.com/electronic-crossovers.html
I'm not clear if they're a clone of an existing device or an original design. They state you can customize the crossover point, so I could order it at 300Hz. (Default is 2200Hz)

https://www.aliexpress.us/item/2251832608891469.html

Specs Listed:

1. Filter type: Linkwitz-Riley filter,

2. Frequency: 2200HZ (20-2200Hz for bass output, 2200-200000Hz for treble output) - The frequency divide point can be customized.

3. Attenuation slope: -24dB/Oct

4. Plate structure: 4 channel output, high pitch, bass

5. OP chip: double precision muses 8920 imported from JRC Company

[pos]

Linkwitz-Riley is a great target for an acoustical filter, but unless your drivers have a flat response far behond the intended crossover frequency you will never get a Linkwitz-Riley acoustical filter using a Linkwitz-Riley electrical one.You need dedicated slopes and EQs to get a a given acoustical target, and that is why the urei 5235 does use dedicated cards.

[VinylGroove]

Linkwitz-Riley is a great target for an acoustical filter, but unless your drivers have a flat response far behond the intended crossover frequency you will never get a Linkwitz-Riley acoustical filter using a Linkwitz-Riley electrical one.You need dedicated slopes and EQs to get a a given acoustical target, and that is why the urei 5235 does use dedicated cards.

I would be using an active crossover to divide frequencies above and below 300hz so I could biamp some 4343s with some charge-coupled crossovers I’ll be assembling.

[pos]

If your target acoustical crossover is a 24dB/oct 300Hz LR filter you you will probably need a 24dB/oct low-pass filter on the woofer and a 12dB high-pass one on the midwoofer, filters Qs and frequencies to be determined...

[Robh3606]

Here is another 4344 bi-amp thread. There are others beside myself that have used Pro 24dB crossovers to good effect. Difference is they were adjustable and not fixed so you could shift the crossover frequency a bit to get the best summing between drivers.

https://www.audioheritage.org/vbulle...highlight=2122

Rob

[VinylGroove]

Here is another 4344 bi-amp thread. There are others beside myself that have used Pro 24dB crossovers to good effect. Difference is they were adjustable and not fixed so you could shift the crossover frequency a bit to get the best summing between drivers.

https://www.audioheritage.org/vbulle...highlight=2122

Rob

Thanks, Rob. I read that thread and bought an Ashley XR-1001 rather than the crossover I linked above. At least I know it will work and others have had good results with it.

[Ian Mackenzie]

In addition to the comments already made I would err on the side of caution with anything from that source. Counterfeit parts, unknown manufacturer? There are better car audio crossovers. Under test the Marchland unfortunately performed poorly in 3rd party laboratory test report.

What l suggest you consider when you are ready is this :

https://www.xkitz.com/collections/ac...i-amplifiers-1

I do have one of these kits and it appears well executed for the price. I have not tested it yet. All you need is your own box which is not difficult to arrange from suppliers in the USA who can custom fabricate for you. The box shields the circuits from noise and electrical interference.

When JBL engineered these systems they actually went to a lot of trouble to ensure the measured response was within +-2 db. Put simply if you don’t do it how it meant to be done it won’t sound the way it was supposed to. Yes it is a hobby and people will argue to the contrary (a well documented human trait). Let them stuff it up because that’s their decision.

I will go into this in a lot more detail in a complete article with new unpublished information on my new website. There’s a lot more to it than mets the eye and it warrants a detailed understanding.

If you really want the authentic JBL sound why not stay true to the original JBL engineering and do it the right way.

[Riley Casey]

If you really want analog active crossovers with 4th order LR filters the world is awash with analog crossovers retired by pro-audio companies when they made the move to digital. Crossovers from BSS, Ashly and TDM would likely be even after 20 years on the shelf better units than something for $175 from Alibaba.

I would be using an active crossover to divide frequencies above and below 300hz so I could biamp some 4343s with some charge-coupled crossovers I’ll be assembling.

[Riley Casey]

Thats along the lines of saying imported from Walmart LOL

... imported from JRC Company

[Ricpan]

I use a Marchand electronic crossover for my biamped 4345s and couldn't be happier. I have used two other before including the Ashley and the Marchand is much better with my system.