They don't lack exactly but I was waiting a lot more from the tuning. Testing was on 0 0 setting, bass down - highs down .Yeah V14 responds very well to EQ. I am surprised you find the bass lacking on them. I find V14 bass to be one of the best iem BA bass out there.
9db sounds like a lot. I EQ the bass by 3db and it's already incredible (without being basshead level).
A Quality copper cable is highly recommended.
Perhaps a deficient unit?
Bass boost I'm meant + 9db at 30 hz only for testing.
With bass up doesn't lack bass at all. Bass is more than enough , bass is better 95 % of any dynamic driver iem and has the best bass of any BA iem for sure. Because I know how capable the 38aj sonion woofers are I was waiting this shocking performance they have .