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2x 500w Class-D Subwoofer Amps

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I have been very happy with my 8-channel TK2050 100w Class-D amplifiers. But recently I play a lot of electronic music and they soon find their limits at the LFE when trying to play at 'discotheque' level :)

 

I need an amp which can drive my four Dayton reference subwoofers cleanly to XMAX.

 

DSC_2576.jpg

 

 

Soon I have a shortlist. Ideally I want Hypex 400 but they're too pricey for the purpose. There are also many 300w ClassD boards but with fans. So in the end I have chosen this

 

2 Channel 250Watt Class D Audio Amplifier Board - IRS2092 250W

 

- No Fans

- 250watt at 8ohms, 500w at 4ohm per channel

- ± 65v rails, 90% eff. It can electrocute you with 110v at full pelt

- $35 shipped :thumb:

 

AA-AB32291_1_b.jpg

 

I will use Atronics ±45v 500VA Toroids as a start. It should give 45*1.414 = 63.6v rails.

 

 

m5730.gif

 

 

And just incase the amps decide to give up, I will protect my subs from 110v DC using these $5 beauties. It also does soft-start delays and I've had few of them. Works really well.

 

$(KGrHqNHJF!FG3p4qV(sBRyVVrtKcQ~~60_14.J

 

 

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I calculated a 2x Hypex UcD400 with PSU and all might cost $600 to build.

 

D-Sonic is nice at 2400watts @4ohms, but I really don't need that sort of power (yet......) and RRP of $1200 is not in the realm of $200 including box which I'm building here.

 

Plus, it's not 'DIY' :)

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Henry, thanks for that. I don't mind those at all !

 

Do you know if they have ± output, so I don't have to buy two ?

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you can use a single smps800re for multiple modules.

I'm using it with the scalable irs2092 150w (2) and plan to use 4modules in single smps.

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I'm sold ! ...

 

Do you plan to use ±60v or ±55v with your irs2092 ? :). I know they are adjustable.

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the 150w use 40v, and my cxD400 use 60v. the voltage was adjusted by connex, you may need to ask cristi about it if u want to adjust yourself

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I have a pair of LJM L20D IRS2092 amps (with Connex SMPS) , they are great but I found them a tad noisy for active use direct into my woofers (95 and then 99 dB efficiency), I went over to my TA3020 modules when I went back to MiniDSP.

 

But I haven't done much work optimising the wiring as they were more than quiet enough for the passive crossovers when I built them.

 

But as  it looks like the sensitivity of those Dayton subwoofers in the 80s they should be great.

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hypex much quieter than connex :).

 

i too use the irs2092 scalable thru minidsp, it introduces hum into the system but this is just temporary setup where no grounding and no chassis. Although after i put direct to emotiva umc-200, the hum arent noticable but still there.

 

cheers

henry

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I calculated a 2x Hypex UcD400 with PSU and all might cost $600 to build.

 

D-Sonic is nice at 2400watts @4ohms, but I really don't need that sort of power (yet......) and RRP of $1200 is not in the realm of $200 including box which I'm building here.

 

Plus, it's not 'DIY' :)

 

D Sonic doesn't build the Class D amp modules. They get it from someone else too. RRP is likely to be higher because of margins but if you can figure out where they get their modules from, you could do a DIY

Edited by DoggieHowser

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hypex much quieter than connex :).

 

i too use the irs2092 scalable thru minidsp, it introduces hum into the system but this is just temporary setup where no grounding and no chassis. Although after i put direct to emotiva umc-200, the hum arent noticable but still there.

 

 

I think I was fairly thorough with the grounding on my build, most of the noise is more amp hiss than ground loop hum (from memory).

 

 

 

ConnexElectronic also have some amp IRS2092 modules.

 

I used a ConnexElectronic SMPS300R module with my L20D modules (running slightly undervolted), so I'm guessing thats about 130W per side.

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those dayton sub controllers, pretty cheap in USA, has all x-over controls too. and makes your rack look like its lots heaps of gear in it....lol

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Thanks all. What amazes me are how much options out there and amazing prices for such performance.

 

I'm now waiting for the shipment of the amps module. I hope to decide on the SMPS 800 or 500 by their size. It seems that I can fit everything into existing enclosure, which will see another saving of $70 and tidiness as bonus. Awesome :)

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