dsnyder0cnn
Addicted to Fun and Learning
- Joined
- Dec 14, 2019
- Messages
- 545
- Likes
- 811
Performance of the LA90D has been exemplary so far. I was initially using it in low-gain mode but had to switch to high-gain after adding FIR filters for digital room correction to overcome filter insertion loss. I'm still able to get levels up into the high 80's / low 90's dB range, which is plenty loud for this somewhat undertreated room.How do find the performance of the LA90D so far?
In case you're curious about the corrections, here's the amplitude response relative to target (I've added a REL T/7i sub since taking the photo):
I still have three or four early reflections that I've not tamed, but step response shows strong correlation between channels after doing some phase correction to account for necessary asymmetric placement in this room.
I have a little bit of pre-ringing in the right channel but not enough to be audible. I used Acourate from AudioVero to build the FIR filters, which I apply using Roon's convolution engine. I created the REW plots you see above by saving sine sweeps with embedded timing reference to WAV files with REW. I then played the sweeps back in Roon while recording the output using REW. This gives me a great end-to-end test.
I'm using a mic that I've had calibrated by Cross Spectrum Labs.
The LA90D does a great job of getting out of the way and allowing the rest of the system to do its job.