Need some treble

What speakers?  I have a suggestion but you must be comfortable getting inside the cabinet and get access to the crossover.  If the tweeter circuit is designed with a choke(resistor), reduce the ohm value a bit.  Maybe 0.5 ohms.  Had to the same myself. 

@sureshmirchand ....an equalizer can 'fix' that high-end 'roll-off' to the degree of another listener noting that everything is beginning to sound 'shrill' to them but ok to you....🙁
If you haven't already, go have your ears checked, generally can be done for free.

The most common 'flaw' in our experience of audio is the age of the listener and the degradation of 'our equipment' in a world of noise.
If you find yourself saying "What?" more of late to people, there's a clue... ;)

Here's a 'quickie cure', meanwhile... 

I've a pair of the earlier 8024's, whereas the 2496 has it on steroids.

Available used....I've some other Behr items, their 'loudspeaker mgmt.' digital x-over is sweet...👍

...does depend upon how one feels about mixing 'phile with pro gear...

I agree to look into modern programmable hearing aids.  They often have music programs that expand the frequency range of the aid and remove filters. The Oticon aids I have do a great job in both normal life situations and listening to music. 

McIntosh has a new 8 band EQ @ 3K...awesome

Suresh

Some great suggestions here, and I have no experience with hearing aids or equalizers. I however can recommend silver cables for increasing treble; either high purity silver, or silver plated. For me personally (since my hearing is not yet fading), they can be a bit much in the detail department....but I could definitely see them as beneficial for needing more emphasis with treble.

Some cables I've tried (some of which I still own): LavriCables, DHLabs, and Zavfino. Those brands seem to offer a very cost effective entry point