First, I'd get a careful audiogram. The usual noise-induced hearing loss is a notch around 4 kHz. Your loss may not cover as wide a frequency band as you imagine, given that you seem to have good high frequency sensitivity.
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Hearing Loss & Equalization
I'm looking for advice on the use of an equalizer to compensate for some hearing loss. I've considered myself an audiophile for many years, but age, abuse, and genetics have finally taken their toll. My hearing now starts to drop off at about 1500-2000hz, bottoms out about 40db down at 3000, and then comes back up at around 8000. In the real world I use hearing aids, but they don't do much for musical enjoyment. I do a lot of headphone listening using a Woo Audio tube headphone amp, and am wondering about whether a good equalizer in front of the amp could compensate somewhat for my curve. Any opinions, or suggestions for a good, high-quality equalizer that won't add too much distortion of it's own?