With the aquaer you can go up to 74Hz - not on any pump and system but the most will work fine with this frequency. In this case the aquastream will produce a pressure of more than 2 meter (200 mbar). This is much more than an 1048.
Stephan,
In this case, is the AS fully reliable, have you tested it this way, no strange error codes from the controller, nothing unusual ?
Sorry for insisting on this point, but my plan is to use 2xAS (since they are the only ones to be 12v) in series, so I have to be 100% sure it will work accordingly to your indications (12V DC, 4.5W - 8W (depending on the frequency) /300 l/h - 500 l/h (depending on the frequency) / 1.2 - 2.1 mWs (depending on the frequency) on the AS web page.
I don't the same situation to happen to me, as the other user that got everything melted (blocks, etc), so any help is welcome.