The Bryston BP-20/25 (SS)will put out 15 vRMS unbalanced (30 vRMS balanced). The Marsh Sound Design P2000t (hybrid FET/tube)preamp will deliver 8 vRMS (balanced). The are doubtless other good preamps with high output. Both preamps have very low output impedance and can handle long cable runs. FWIW, at five meters, your IC run is not terribly long, but could be a difficult load for a low gain preamp. I connect an older Bryston 11B with 27 feet of DIY Belden 89259 interconnects to a Bryston 14BSST and couldn't tell any difference when compared with a 3 foot IC. If you have noisy AC power or RFI, balanced interconnects would be the best choice.
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