Does anyone have the QRx212 Bi-Amp settings with the Itech amps?
Or is there a contact at EV that can help me.
Or is there a contact at EV that can help me.
Does anyone have the QRx212 Bi-Amp settings with the Itech amps?
Or is there a contact at EV that can help me.
If you are measuring the output of an Itech, make sure you have something connected to the output, as the response changes depending on what impedance load is connected.
Silas is referring to a series of posts by Langston Holland where Lang documented the way the HF response changed with load impedance. I don't recall if Langston posted here or over on PSW, but I do recall his rather extensive comparisons of the original I-Tech and 2 or 3 other amps.
I suspect many people with "average" hearing, on most PA systems, won't notice a difference.... it starts around 14k, IIRC. I wouldn't call it drastic, but it is audible to some folks, particularly under "listening test" conditions.
There are some DriveRack 260 settings floating around; that are said to be EV built.
Can someone with the DX38 or DC-One post up the settings?
The difference is up to 5dB at 20k IIRC, and that is only comparing 8 ohm to 2 ohm. Open circuit the difference would be much more.
I will also mention: ALL class D amps employ a low-pass filter on the output, and this filter becomes part of the circuit with the load altering the response of the amp. So, any time you're measuring a Class D amp, the output must have the nominal load applied for the measurement to be accurate.
And my point was that there is no PA system with flat response @ 20kHz to begin with, and air absorption will become a dominate factor at a relatively short distance. While not something to ignore, it's hardly a deal breaker in day to day PA use.
I can easily spot a 1dB change at 16k while using them.
But can you hear the difference between 16khz sine and square waves?
Just as a note: Driverack settings do NOT translate to other Harman brands, nor do they even translate to other Driverack models.