...What matters is that you have an amp you wanted, you enjoy it and got it at a good price. Be happy. ...
If you still want to know more about amplifiers, you could start with:http://sound.westhost.com/amp-sound.htmI don't agree with or endorse everything the author writes, but anyways it's a good read.
Just one little note: electrolytics don't age as well as other components, so eventually I would recommed you have it checked by a reliable, honest technician.
Marantz had a great reputation which got worse as they cheapened the product. By and large they were more expensive than others. They had the reputation of being better. What matters is that you have an amp you wanted, you enjoy it and got it at a good price. Be happy. What should you care about other folks' opinions about Marantz, unless you bought it to impress other folks?
If you still want to know more about amplifiers, you could start with:http://sound.westhost.com/amp-sound.htm[...]Just one little note: electrolytics don't age as well as other components, so eventually I would recommed you have it checked by a reliable, honest technician.
...Thanks for the article and the hint on the caps. Since the amp sounds fine to my ears i think i'll open it up and check for leakage and if i can't find any, i'll leave it as it is. Is there any danger in shifty caps in terms of damage to electronics rather than just affecting sound quality? ...
Bleh, and i promised myself i wouldn't spend more on audio for a while... I am proficient with a soldering iron but i'd still rather not take the risk. I just know what a hellish job it would be to replace all that.Anyway, i would assume the only common mode of failure is changes in capacity (a reduction i suppose). What is the risk of the other horrors you mention? I never hear about it....
And I doubt "hey ladies wanna check out my amplifier" will get me anywhere.
The amp also definitely belonged to a smoker, given the smell it has inside and the kind of greasy-ish dirt that is on the components (is there such a thing as a parts washer for electronics?).
...and i imagine the capacatively coupled output could cause oscillations in combination with a speaker coil's inductance. Is this true or is it not as important as others claim? If so, what do i need to know when looking for speakers?
...Oh, don't forget to turn the amp off and release all connections before spraying
...As for the speakers, does that mean that it's just like any other amp as far as speakers are concerned? That would ease my search.
Life is good!
It suggests that the amp is quite inefficient but it also runs quite cool. It has an output resistance of .08 ohms, so with 4 ohm speakers i'd have a damping factor of 50, that should be enough, right?
Simply turning off the amp is not good enough. Unplug the amp and wait for all capacitors to discharge before using any spray inside it. Also make sure you use a spray that does not leave any residues. And do not direct the spray to the trimpots or volume/tone controls.Personally I wouldn't attempt any cleaning of the innards of your amp, just leave it as is, clean the outside and forget about the inside.
...I once did an extreme cleaning of a motherboard that my dog pissed on ...I am not recommending you do this extreme cleaning unless absolutely necessary.[/b]