As an alternative to "tonal richness" you actually could try a Tortuga:
http://https//www.tortugaaudio.com/products/passive-preamps/ldr3000p-v25-passive-preamp/
30 days; return shipping your only cost.
Apple remote.
http://https//www.tortugaaudio.com/products/passive-preamps/ldr3000p-v25-passive-preamp/
30 days; return shipping your only cost.
Apple remote.