JVC RC M90

Have RC M90 and wanted to clean dust on bottom part of speakers behind grill. Is that hard to access with out messing up box?. Response would be appreciated.

one side is easy to get to ,the other side you have to remove the core support to access the speakers which means a lot of work .

You could try those cans of compressed air - the ones with the little straw / tube attachments. I've used them with good results. Just be careful not to get too close to the speaker because you could blow a hole through it.

The best and most efficient way to clean it is o remove the chassis and unscrew the speakers from the back. Best to use a large horse hair paint brush to clean them with. Plus that is a good way to learn how to take the box apart and become familiar with it....I can pull mine apart and remove the chassis in under an hour so it isn't that bad. Make sure you label ther screws though because there are lots of them...

Just remember to snap lots of photos of all the connectors. One member took apart his M90 for the first time to "clean", reconnected the power connector to the wrong spot, and promptly caused his Power Supply to emulate puff the magic dragon. Needless to say, the Power Supply was toasted. I know, because I rebuilt it. The result could've been far worse.

100 %

I've vacuumed it out through the front before now. AS long as you dont use a super industrial strength vac it works fine.

Take pictures of each step for later reference.
Label your plugs and the receiving components to make your reassembly is easy for you.
Take an extra minute to make envelope packs, It's easy to use paper and tape, for different screws and simply label them.

Thanks for feedback