Moving the mic up and down determines acoustics center where the drivers are closest in phase with each other. If Wolf used LR4 or something similar the drivers phase should be track each other to sum close to flat on axis at crossover point. If one of drivers is reversed it would create a deep null. However, I use it so I adjust delay in the x-o simulations.
When you take measurements of individual drivers (frd and zma) and put them into something like XSim which has minimum phase extraction capability and ability to change the delay you can simulate the crossover, so it will be mirror of what you measure with current x-o. You can modify the x-o by reducing the dips created by bigger baffle or sharp edges. Since I don't have the driver files I can't model anything but, say you want to add a bit of a boost in 3k, you might lower value 0.82 Ohm resistor in series with coil in tweeters filter, or change the capacitors values. However it will change also the phase. Basically you play with the components until you're happy with the sound or measurements, hopefully both of them.
When you take measurements of individual drivers (frd and zma) and put them into something like XSim which has minimum phase extraction capability and ability to change the delay you can simulate the crossover, so it will be mirror of what you measure with current x-o. You can modify the x-o by reducing the dips created by bigger baffle or sharp edges. Since I don't have the driver files I can't model anything but, say you want to add a bit of a boost in 3k, you might lower value 0.82 Ohm resistor in series with coil in tweeters filter, or change the capacitors values. However it will change also the phase. Basically you play with the components until you're happy with the sound or measurements, hopefully both of them.
Attachments
Last edited:
Maybe, yes. There isn't necessarily a problem with a peak a little off-axis vertical. Sometimes it is preferred.
That's why I wrote potentially. In my room it would be problematic. But if there is a measured flat response at 30 degrees off axis in room, why bother with it? In my opinion it's not detectable. But hey, everyone have their own spices to enjoy🙂
Last edited:
I came across this thread researching their drivers.
It seems they are out of business maybe unfortunately.
they say they can sell items at this time dut=ring checkout and don't reply to email inquiries.
Its sad because I was very intrigued.
Not sure what is going on with RAD, but since the new owner took the reigns, prices have risen and access or admission has been drastically hampered. Not sure they arent completely inaccessible/unavailable but limited for sure.
Yes, they were great drivers, and Rival still builds them, but not certain a distributor is present.
Yes, they were great drivers, and Rival still builds them, but not certain a distributor is present.
New ownership, too bad. I tried to purchase some SB tweeters and Rival woofers but nobody responded. Before I purchased the big kit capacitors and resistors kit from Rhythm and Design - good value. Oh well. Maybe there's a way to purchase Rival drivers directly.
Seems like GOWA might not be available on DIY Audio 🙁 I can't send a message to him...
Thanks for the reply!
Maybe a Canada only thing right now as far as sales...
At least I think they are in Canada?
They WERE Canadian based, but the newer owner is stateside. Rival is also Canadian.
I'm from Ottawa, RAD sent my package from Vancouver area over a year ago. I have no idea what's going at RAD these days. They ship to everyone in North America.