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_henry_ 28th June 2012 11:02 AM

finding the right AMP from connexelectronic

i need 6ch of amp for my active speakers project.

after research for few months, it seems the irs2092 based class d amp is one of the better performing amps.

i will use miniDSP 4x10 and/or TC Konnekt 48 as DSP platform to actively managed the drivers into 3way.

me and cristi have exchange emails in few bits, but there's things that im not yet clear (newbie and limited experience regarding diy amps)

cristi told me the IRS2092 scalable amp needs preamp (someone on other forum mention cristi told him that the IRS2092 modular is the best, as the cx300 and cx400D is "entry level"), im wondering if miniDSP good/loud enough to drive them.

im planning to use 6 x 150w IRS2092 modular with 1 x SMPS800RE, as to protect the drivers, and it wont need much power for active setup.

i really appreciate for any inputs regarding this.


mattlong8 29th June 2012 07:20 AM

The MiniDsp 4x10 has a max of 8Vrms output max, which should be fine depending on the configuration of the amp/speaker combo.


_henry_ 29th June 2012 08:20 AM

hi matt,

it will be 90db+ dual mid + tw, and 89db quad woofer in 3 or 4 way system.


mattlong8 2nd July 2012 11:23 AM

what you need to look at is the amplifiers input voltage range and it's total gain. See how these compare to your dsp and speaker ratings. My guess is you'll probably be fine with either dsp unit.


Cristi 2nd April 2013 05:54 AM

SMPS800R(E)+CxD400 Connection
1 Attachment(s)
I will post here brief instruction for connecting SMPS800R(E) and CxD400 modules. I hope this information will be usefull for most of the users, altough requires at least mininal electronics knowledge to avoid smoking-out the boards. At the switch terminals, a mains swtich must be connected (a device which has two or more terminals and when pushing a button connect those two terminals together through a mecanical assembly. the switch does not have + and - as I was asked)

To operate the CxD400 modules, only need to apply power to the green connector as is indicated in the above pictures. nothing else need just the input signal, as follows:

Signal Pinout:

pin1: Inverting input
pin2: GND
pin3: Non-inverting input
pin4: GND
pin5: Shut-down (output, will be ~5V when mute, below 0V when not mute)
pin6: Mute (normally unmuted, need to pull to GND to mute)
pin7: Temperature feedback (output voltage proportional with the temperature of the heatsink)

If no other signal is needed than input and mute, leave them unconnected.

If unbalanced input is used, connect only one input for example pin1 and pin2 for left channel to signal input GND, and pin3 to Signal Input. If the signal must be 180* inverted, then connect pin 1 and as signal input and pin 2&3 to signal GND at input connector side.

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