I've gone cross eyed looking for an affordable amplifier or amp board that can supply at least 1000w to drive my subwoofers. Can anyone point me in the right direction?
It's not a DIY-amp answer, but I use a Behringer EP2500. Makes a good stopgap for testing the speakers before committing to an amp build, if nothing else.
If you actually did put 1KW into your speakers it would blow the cone across your room.
May I suggest you find the 'snake oil' thread on here.
Cheers
May I suggest you find the 'snake oil' thread on here.
Cheers
THX reference level requires headroom to 115dB... which requires 1kW from a driver with 85dB/1W sensitivity.
There are people here building 120-125dB systems, particularly for PA. You can buy 140dB+ subwoofer systems commercially for use in larger entertainment venues.
May I suggest you look into the power requirements of real-world professional-grade systems before snarking?
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https://www.crownaudio.com/how-much-amplifier-powerQuote from the above;
- Typical loudspeaker sensitivity is 85 dB SPL/W/m for home stereos, 95 dB SPL/W/m for small PA speakers, 100-105 dB for medium PA speakers, and 110 dB for large PA speakers.
PA speakers are not subwoofers. Those 100dB things (with light cones and limited xmax) will achieve an F3 of something like 40-70Hz depending on the box.
For subwoofers - where you want response to 15-25Hz - the Mms is higher and sensitivity lower. Typical real-world examples:
Beau has a perfectly valid question and does not deserve to told he is searching for snake oil.
For subwoofers - where you want response to 15-25Hz - the Mms is higher and sensitivity lower. Typical real-world examples:
- UM12-22 (12"), 83.7dB
- UM18-22 (18"), 85.6dB
- RSS460HO (18"), 90dB
- RSS390HF (15"), 88.2dB
- Adire Shiva (12"), 87dB
- Adire Tempest (15"), 89dB
- 15DS115-4 (15"), 93dB... but only to 35Hz
Beau has a perfectly valid question and does not deserve to told he is searching for snake oil.
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Why? Is this for some outside PA use? Have you modeled your speakers looking at what power reaches X-max?
I used a Behringer. Modified the heat sinks and fan so it was quiet. More than good enough and probably a lot better than any plate.
For some evenings.
I am using a crown xls 1002.
1000 Watts in bridge mode ... Integrated high and low pass filter ...
3 year warranty by harman.
It's a DIY project killer ... for the price! 🤫
Sadly....
It seems that there is a global break for this model.
Too bad, for a PA amplifier, it really surprised me,
and the more it is solid .... 48 hours on generator ... to the max
All ears present were surprised.
I’m also looking for a high power class d amp to drive subs. Thinking about the Behringer NX6000D. Anybody tried it?
Not personally. You will find a lot of opinions on here about it though, often involving fan noise.
I think its relatively straightforward to replace the fans with low noise ones. However just today I’ve been reading about the Icepower 1200AS modules. A dual mono build would work for me. That’s now top of my shortlist.
Ebay Stagetone 1500W 4Ohm Class D Modul
I use the 3-channel version with a Xilica XM2040-P DSP for my PA-Sub Sat System, 2x AD Systems Flex18B and 2xKME VL12. Measured the 3-channel Modul 1x1800W @4 Ohm and 2x700@4Ohm. Or sligthtly over 2kW only the sub channel driven. The modul self has a print on it which says 4900, the sub is working in btl mode.
I have the setup two times, the second is powered with a Pascal XPro-3 , there is no audible difference, besides the fans from the amp-modul.
Or this
Pascal S-Pro2
I use the 3-channel version with a Xilica XM2040-P DSP for my PA-Sub Sat System, 2x AD Systems Flex18B and 2xKME VL12. Measured the 3-channel Modul 1x1800W @4 Ohm and 2x700@4Ohm. Or sligthtly over 2kW only the sub channel driven. The modul self has a print on it which says 4900, the sub is working in btl mode.
I have the setup two times, the second is powered with a Pascal XPro-3 , there is no audible difference, besides the fans from the amp-modul.
Or this
Pascal S-Pro2
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Beau, what subwoofer(s) are we talking about?
Are we talking 2, 4 or 8 ohms?
Building a DIY amp to do 1000W in 8 ohm is not that easy at all ... you'll need a supply voltage of +-130V .... that's a lot 😉
2 ohm is much easier, here we are talking about +-65-70V ... but also a lot of amps ....
Yes the down side of the pro amps is that they almost all employ fans
Hypex?
And yes a lot of subs today do require and are capable of handling 1kW 😉 ...... I myself have an Earthquake 15 inch which is still in need of more power 😉 ... ongoing project
Are we talking 2, 4 or 8 ohms?
Building a DIY amp to do 1000W in 8 ohm is not that easy at all ... you'll need a supply voltage of +-130V .... that's a lot 😉
2 ohm is much easier, here we are talking about +-65-70V ... but also a lot of amps ....
Yes the down side of the pro amps is that they almost all employ fans
Hypex?
And yes a lot of subs today do require and are capable of handling 1kW 😉 ...... I myself have an Earthquake 15 inch which is still in need of more power 😉 ... ongoing project
Eh, +-70V if you do bridge-tied load. The current is increased so you need to build it to the same standard as two single-ended amps rated at 500W/4R to hit 1000W/8R. No free lunches etc.
Don't forget switchmode (class D). It's not something to attempt for a first amplifier design, let alone first build but there are things like the IRS2092 (and probably newer variants; I haven't looked) that you can use to make a very large subwoofer amp. There are items claiming 2kW and 3kW on eBay, which is not me endorsing them as being fit for purpose (they will probably catch fire at rated load), but they are in principle feasible.
Fans can have speed control. Modern 4-pin PC fans can be really quiet, and you can readily control their speed so that they only crank when the music is cranking i.e. the amp is getting warm.
The Pascal X-Pro3 Amp runs without a fan, but the X-Pro3 is not cheap.
The S-Pro2 must be atachedt to a propper heat sink, and than it runs without a fan.
.
The S-Pro2 must be atachedt to a propper heat sink, and than it runs without a fan.
.
Sure electronics do 1kW+ amp boards: https://store.sure-electronics.com/list/3/13
as does: https://connexelectronic.com/
and Hypex also do high powered amps: https://www.hypex.nl/product/nc2k-oem/79
The cheapest solution however is a used PA amplifier placed in another room (fan noise). There are also extremely high power china amps available now: https://www.diyaudio.com/community/threads/suggestions-for-powerful-pa-amplifier.380439/
If you have to have the amp in the same room this thread may be interesting: https://www.diyaudio.com/community/threads/quiet-pa-amps.339848/ I use 3*p7000s and a P5000s in my system which are essentially silent for home use both in terms of fan noise and electrical noise on 100dB/2.83V speakers.
as does: https://connexelectronic.com/
and Hypex also do high powered amps: https://www.hypex.nl/product/nc2k-oem/79
The cheapest solution however is a used PA amplifier placed in another room (fan noise). There are also extremely high power china amps available now: https://www.diyaudio.com/community/threads/suggestions-for-powerful-pa-amplifier.380439/
If you have to have the amp in the same room this thread may be interesting: https://www.diyaudio.com/community/threads/quiet-pa-amps.339848/ I use 3*p7000s and a P5000s in my system which are essentially silent for home use both in terms of fan noise and electrical noise on 100dB/2.83V speakers.