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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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