The missing piece, any ideas?

neutron7 · 01:46 AM

I am building a slightly unusual biamped pair of speakers for my studio.
most of the range will be done with a pair of markaudio alpair 12 powered by LM3875 chipamp.(or something similar, doesnt have to be a chipamp, but 50w or so)

the crossover and speaker equalization will be handled by a miniDSP(have already, bought 2 needed 1 for another project) active crossover, The only source is a "sonic|core xite 1"

the low end is by a pair of CSS SDX10(have already) woofers, they will handle ~30hz to the crossover point (120 - 250 hz, see what works best) they will be in sealed 24L enclosures.

The reason for them is i have a small home studio, and occasionally some of my music gets played elsewhere, and sometimes there are problems with bass i cant really hear properly when tracking. I have event monitors which do not play much below 60 hz, and i wanted to build something around the same size, but with lower bass. i dont really like subwoofers as separate speakers in a studio.

To power the SDX10s, I would like to buy a kit, or boards to build a pair of 200 - 300W class B or D amplifiers for the woofers(4 ohms), i have a 600VA +-22v transformer i would like to use, but i dont mind getting something different if that is not suitable.

I will hardly ever need that much power, but the efficiency in a closed box is low,and I will be artificially boosting lower frequency, and i would like some headroom. There is a possibility that low bass will be played for extended periods, not that loud, but somehow i feel a paralleled chipamp would not be up to it.

I have not done much high power amp building, just a ton of chip amps, but building things isnt a big deal, most of my modular synth is DIY.

any ideas? i guess i could just buy some plate amps, but i would prefer something that can be built inside a separate box.

best regards
N

rabbitz · 1st October 2011, 07:59 AM

Look at the OAudio 300W BASH which is much easier than DIY sub amps believe me. The crossover can be by-passed amongst over features.

http://www.oaudio.com/300W_SUBAMP.html

I've put mine in it's own enclosure and not in the sub box.

neutron7 · 1st October 2011, 05:24 PM

Wow that is quite inexpensive, it even includes a power supply.

neutron7 · 1st October 2011, 08:39 PM

Upon further reading, this looks like it would be quite good for my application. thank you for the link.

1st October 2011, 01:38 AM	#1
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	The missing piece, any ideas? I am building a slightly unusual biamped pair of speakers for my studio. most of the range will be done with a pair of markaudio alpair 12 powered by LM3875 chipamp.(or something similar, doesnt have to be a chipamp, but 50w or so) the crossover and speaker equalization will be handled by a miniDSP(have already, bought 2 needed 1 for another project) active crossover, The only source is a "sonic\|core xite 1" the low end is by a pair of CSS SDX10(have already) woofers, they will handle ~30hz to the crossover point (120 - 250 hz, see what works best) they will be in sealed 24L enclosures. The reason for them is i have a small home studio, and occasionally some of my music gets played elsewhere, and sometimes there are problems with bass i cant really hear properly when tracking. I have event monitors which do not play much below 60 hz, and i wanted to build something around the same size, but with lower bass. i dont really like subwoofers as separate speakers in a studio. To power the SDX10s, I would like to buy a kit, or boards to build a pair of 200 - 300W class B or D amplifiers for the woofers(4 ohms), i have a 600VA +-22v transformer i would like to use, but i dont mind getting something different if that is not suitable. I will hardly ever need that much power, but the efficiency in a closed box is low,and I will be artificially boosting lower frequency, and i would like some headroom. There is a possibility that low bass will be played for extended periods, not that loud, but somehow i feel a paralleled chipamp would not be up to it. I have not done much high power amp building, just a ton of chip amps, but building things isnt a big deal, most of my modular synth is DIY. any ideas? i guess i could just buy some plate amps, but i would prefer something that can be built inside a separate box. best regards N Last edited by neutron7; 1st October 2011 at 01:46 AM.

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1st October 2011, 07:59 AM	#2
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Look at the OAudio 300W BASH which is much easier than DIY sub amps believe me. The crossover can be by-passed amongst over features. http://www.oaudio.com/300W_SUBAMP.html I've put mine in it's own enclosure and not in the sub box.

1st October 2011, 05:24 PM	#3
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	Wow that is quite inexpensive, it even includes a power supply.

1st October 2011, 08:39 PM	#4
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	Upon further reading, this looks like it would be quite good for my application. thank you for the link.

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