Quote:
Originally Posted by
SpeakerPower /t/1449918/new-speakerpower-rack-mounted-subwoofer-amps#post_22860826
Hi All. I am the owner of SpeakerPower. I just found this thread and thought I would answer a few questions.
Made in USA. Yes all assembly and test is in Santa Ana California. Some of my smaller amps use oem amp modules but in these high power sub amps every circuit board is assembled locally.
Low noise fans are available for noise sensitive applications. Also high noise, high output fans for pro sound users who want to wring every bit out of their subs doing electronic music shows.
DSP is not available in the amps for retail sale now. They have a analog sub bandpass filter which can be switched to flat if signal processing is done upstream. I don't think DSP is the "most useful feature" when for HT at least, most preamp processors have this built in. This amp is most useful when you need solid power to very low frequencies at high duty cycles.
Comparisons to other amps on the market must be done carefully since many amps have specs that are uhhh optimistic at best. Especially at low frequencies, some amps just don't hold up. I have benchmarked my amps against the real Lab Gruppen FP14000 and the Pascal Xpro "2400W" amps used by FW. Here is what I measured.
Pascal Xpro3 CH1 only 120VAC mains
1400W/4 1KHz 1% for 2 seconds, dropping to 223W after that
730W/4 40Hz 1% for 10 seconds dropping to 223W after that. Lower frequencies are even worse.
Lab Gruppen FP14000 120VAC mains
3000W/4 for 200 milliseconds dropping to 1500W/4.
4800W/2 for 80 milliseconds dropping to 1500W/2
Yes that's right. Milliseconds. Thousandths of a second.
SpeakerPower SP1-4000 120VAC mains
2400W/4 40Hz 1% indefinitely
4000W/2 40Hz for 4 seconds, dropping to 2000W/2
As you can see, almost all amps these days have a short term power which finds its way onto the spec sheet, and a long term power that you can't find anywhere. This is a valid design strategy, but any burst power spec shorter than 50ms at 40 Hz (2 cycles, sounds like a kick drum thump) is useless IMHO.
Thank you for your interest. Let me know if you have any other questions.
Brian Oppegaard
President
SpeakerPower Inc.
www.speakerpower.net