Meridian M2 active speakers 'hiss'

[smeegazzle]

Hi all

I have just aquired a pair of Meridian M2 active speakers's and I love their sound. one develops a 'white noise' type of hiss which gets worse over time.

The hiss is independent of volume setting, and reaches a level after about 10 minutes where it is becoming annoying.

I have researched this forums history and found a similar problem which was resolved by replacing an LF353 op-amp in the crossover.

Would this be a reasonable way to go? Any advice welcome

Thanks - Gary

 

[AndrewT]

Short the input with a dummy zero ohms plug.
Then decide that the "hiss" problem is in the M2 amplifiers and which one. I think there are three in each M2.

 

[smeegazzle]

Just a quick update; got 3 new LF353N op-amps from RS and fitted then to the small crossover PCB (which is a plug in onto the main board) and all his is gone!

Well chuffed, only cost £1.80

Anyone needs docs on 101 / 105 / M2 Meridian kit let me know?

Gary