I have been using Sony GRX 9000 for the last 4 years, from the very begining of launching the product. The product is very good and having sound output of 3200 PMPO with karaoke. The system has 3 audio CD changer, double cassette deck, Radio. I found the performance of the system is very good. However, one thing, which have realised is having high volume system has its on disadvantage, like maintenance. The maintenance of the system is very high. I got the first shock, when CD started malfunctioning after 3-4 days of warranty expired.The cause was given to us that we are not using CD regularly and suggested to use it atleast once in a day. Inspite of this, system keep giving trouble on CDs. Now CD system is again not working as CD tray comes out, when system is in power mode, hence unable to use the system. The other negative aspect of Sony is their service response. I have been facing this problem for the last 15 days, and inspite of repetitive reminder, people are not finding time to attend the cause.
On an average my expenditure on maintenance per year is around Rs.4000/- on the system, which is very high.
The quality of the sound is surely very good. I suggest people to go for this system. My problem may be particularly with my set and may not occur on other system.