Got home this afternoon after travelling over the other side of the country to collect a Musical Fidelity A370 power amp that I had won on eBay. For those of you unfamilier with this 'beast' it was made around 25 yrs ago as MF's answer to Krell power amps - and a beast it is weighing in at over 45Kg and around 300mm tall.
Its a Class A 185 watt per channel amp that draws 650 watts at idle......wont need the central heating - both sides on the amp are actually the heatsinks and heat up to around 60 Deg C !
here is the amp sat on top of my rack....best place to dissipate all that heat
On getting it home I took the top off to take some pics..and remove a load of fluff with a air duster !!....
The isnside of the amp is dominated by two huge torriodal transformers (its essentially a pair of monoblock amps in one box) with associated reservior capacitors, and 10 op amps per side bolted directly to the massive heat sinks.
reservoir caps ....yes 10 22 000 uF Elna caps per channel !!
There is some evidence of overheating in the past on the top of the circuit boards...these amps were well known for this ....maybe an area to be sorted in the near future.
Once cleaned I connected it up...fed from the preamp output on my MF XA-1 (it has a passive output ) that currently feeds the Fostex 103 fullrange units and additional Kef T27 tweeters. I left my trusty MF A1000 (50 watts Class A super integrated amp) to drive the transmission line R50 bass units.
We put on Hugh Lawrie...St James Infirmary and WOW ....at my bake off I had thought that the midrange from the Fostex was lacking....but now it hits you full on - loads more detail and impact. Ive been trying all sorts of tracks since and every one is a step change for the better
The bonus on collecting the amp was the guys mother insisting I took the pre amp he had been using with it aswell...!! So I now have a Musical Fidelity MVT preamp
Ive tried it in my system, but currently it doesnt sound as good as the passive control via the XA-1...maybe it needs some TLC and upgrading.
Ill let you know how this progress with this beast....