I'm loving my TVC but I'm have matching problems with a Sonic Frontiers SFP-1 phonostage.The sound is unbalanced,dull,and muffled somewhat.I'm thinking impedance mismatch.SFP-1 output impedance is 1k.For comparison,I tried my -on hand- ladder 10k attenuator and a 10k series smd resistor atten. and they both sound fine and balanced from top to bottom.From here signal goes to a Marchand crossover with input impedance of 30k,output impedance is 50ohms.
Also-with cdp, the att.'s have better attack,bass punch and weight.TVC is more transparent and more open.Any help would be greatly appreciated.