Hello Everyone. I am planning to replace my Peavey IPR3000DSP with two B&O 1000ASP modules to power my six AE OB15 subwoofers (3 subwoofers per channel, one 1000ASP per channel). The OB15's are 8ohms each, meaning a 2.667 ohm load in parallel. Does anyone have experience operating a 1000ASP at loads less than 4 ohms at very low frequencies? I've read B&O's datasheets for this amp and they say it is very flexible regarding final loading but I can only find confirmation of this at 1khz. Anyone know if these will perform well down to 20hz and below at 2.667 ohms?
Thank you!
Thank you!
Depends on how hard you want to drive them. The load itself should not be a problem, but you will hit both the "soft-clip" and the hard current limit quicker (it is at something like 23A and 40A IIRC) and if you drive them hard, the thermal limits of the module might come into play as well. I doubt you'll destroy anything though.
If you do try, you might want to experiment with adding more capacitance to the DC-bus as described in the designer's manual (remember to use caps rated 160VDC and bleeder resistors!). This is exactly the sort of application where extra capacitance might be a benefit.
If you do try, you might want to experiment with adding more capacitance to the DC-bus as described in the designer's manual (remember to use caps rated 160VDC and bleeder resistors!). This is exactly the sort of application where extra capacitance might be a benefit.
Thanks for the reply, I've been reading about people who use extra capacitance and that sounds like the way to go.
40A ?
The unit will never deliver 40A at the ouput at ANY load, since the protections will kick in much earlier.
,
What makes you say that? Max. Iout according to the datasheet is 40A although this will be instantaneous loads of course. 23A into a 4 ohm load on a BTL amp is around 1050W which corresponds quite closely to what you can measure out of these modules.
Output is of course thermally limited as well, so it will not run like this for very long, but for music it will do these levels.
/U.
Output is of course thermally limited as well, so it will not run like this for very long, but for music it will do these levels.
/U.
Lets see if any one can show evidence of the 40A output at any load, even for short period.
- Status
- Not open for further replies.