is it qood idea to use an Equalizer with amp

It depends on how bad your room acoustics are. From the sound of things you have little or no experience using an equalizer and you kind of have to know what you're doing in order to get good results.

But I have used both a relatively inexpensive dbx 31-band graphic equalizer and a Lyngdorf digital preamp with digital room correction and have gotten very good results. The system sounds much better with the EQ than without. That said, as I mentioned above, there is a learning curve--also, every aspect of sound quality cannot be fixed with an equalizer.

I disagree with you Elizabeth... have you actually tried all the various kinds of equalizers you've mentioned in a "high-end" system?

Have you owned a unit with advanced digital room correction like the Lyngdorf or DEQ units? Have you used the Behringer DEQ2496 full-range in your system? And have you tried a unit like a basic DBX 1231 in balanced mode in a high-end system?

I can say that in my system the dbx 1231 sounded very clean, low-noise, and musical with no apparent grunge. Playing the system in my large room without EQ makes no sense. The dbx only costs about $350 and will work very well for those folks who just require a modicum of EQ and don't have the funds for something like a Lyngdorf, which works even better but costs much more. I've not used the Behringer DEQ2496. I've heard some say it's good for bass EQ and for its built-in RTA, but maybe not great for a full-range EQ. But I haven't heard it with my own ears in my system so I can't confirm that.

I'd be curious to hear of your actual use of the EQ's you've mentioned in your own system, because your conclusions/assessments don't align with my experience.

Elizabeth, in retrospect I do agree with you on one point... the fewer A-D and D-A conversions you have in the signal path the more transparent the sound will be.

Frank