stk4050 parallel

[Hannes.Soobik]

I´ve a plan to put STK4050 for 4-ohm load into parallelconnection.Have anybody
tried it?

[Dj BASS AMP]

the STK rules is:
minimum 4 ohm .....

and if will connect in parallel it is will destroy the STK (2ohm+2ohm) = 4 ohm in parallel

i connect sub 2 ohm to my old amplifier with stk465 and the stk very warm and burn.......

soo....... dont tray it...

[Hannes.Soobik]

I´ve ment under parallel connection that i want to connect them this way with "so called" fitting resistors at the outputs(ca 0.5 ohms)

[sangram]

My guess is no.

STK modules are actually discrete built up modules, made with various components bonded onto the substrate and not etched in like 'normal' chipamps... Matching between modules will have to be very carefully and manually done - output offset and quiscent current will have to be exact - I see you buying quite a few ICs, and you will need 0.1% resistors in 0.22 ohms to ensure symmetrical loading. Not recommended. AFAIK the 40... series are rated for 8 ohm loads and not for 4 ohms?

If you do have 4 ohm speakers only, you can drop the rails down to 80% of the rated rail, and go into a 4 ohm load to get the same power, but please remember the STKs have higher distortion figures into 4 ohms than into 8.

[wifi]

I've tried so far two STK4046XI, one 4048XI and two 4050V and burned them all !!!!!
I checked and re-cheked times and times the circuit and nothing seems wrong, searched any possibility for a circuit diagram over the net and all data sheet are giving the same basic circuit!
I'm using a +/- 48Vcc from a switching power supply (i started with 55V then reduced it to 48 after many failures
what is happening is that i'm getting around -44Vdc on the output!!!!
any suggestion?!?!?!?!?!

[CBS240]

Hi

I don't think it is a good idea to try and parallel these power amplifier modules. Electronically, it's suicide. You may try reducing the voltage to try with 4 Ohms, but I think these are really intended to drive 8 Ohms. 4 Ohms could be operating close to the SOA limits and might reduce life expectancy. At what minimum voltage will these modules still operate?