Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: Vitavox midbassPosted by anthony on: 2/19/2021
Romy,
I am considering a midbass channel similar to that you are currently using. The plan is to use the channel as a form of EQ to help rectify a large circa 40Hz room mode...bass cannons below the mode, midbass above the mode, and upperbass horn above that...hopefully better bass as a result, and less floor shaking.
On hand are four Vitavox 15" drivers. I've run impedance sweeps and measured the T/S parameters of them all and it seems as though I have two nicely matched AK150's and two well out of spec K15/40's all with the Alnico motors and 15ohm voice coils. As you know, all the Vitavox 15"ers are identical apart from the cones and it is possible to change them to any of K15/40, AK150, AK151 and AK152 with just a cone swap. The K15/40 and AK150 use the exact same cone except for an additional final process on the surround of the AK150 to make it more compliant and reduce Fs by 10Hz to 35Hz.
Given our very similar systems and re-reading your adventures with the new room and the mid-bass channel, I thought I would ask for your thoughts. I am about to order some replacement cones and given the lower Fs and my specific requirements with the 40Hz mode am considering changing over to all AK150 (instead of all K15/40) and perhaps eventually finding a third pair in case they are needed to compliment the extra sensitivity of the 8 driver a side Bass Cannons.
Anthony Rerurn to Romy the Cat's Site