4004II+ls-3 was my setup once.
First, IMO, ls-3 is not warm but very analytical, maybe a little bit cold pairing with 4004.
Second, changing from L-1 to LS-3 will not change the sound evidently.
Third, if you own either L-1 or LS-3 or smae level pre, upgrading 4004 or perhaps the speakers (?) might be the better move in terms of quality or flavor.
First, IMO, ls-3 is not warm but very analytical, maybe a little bit cold pairing with 4004.
Second, changing from L-1 to LS-3 will not change the sound evidently.
Third, if you own either L-1 or LS-3 or smae level pre, upgrading 4004 or perhaps the speakers (?) might be the better move in terms of quality or flavor.