Looking at these options. Acurus A2002 200wpc Class A/B Lyndorf SDA 2175 200wpc Class D Wyred4Sound 250wpc Class D Red Dragon Monoblocks 250wpc Class D Anyone tried them? Obviously need a pre to go with them. I found last time i tried speaker amps, had to use resistors to tame the hiss. Is it better to use resistors to achieve 8ohm or 4ohm for the amp? 3.3ohm and 1ohm wire wound resistors gives you about 4.26ohm speaker impedance for the amp. 4.7ohm and 3.3ohm wire wound resistors gives you about 7.6ohm speaker impedance for the amp. Hifiman have 25ohm and 10ohm resistors which gives you about 32ohms for the speaker impedance. https://robrobinette.com/HeadphoneResistorNetworkCalculator.htm From memory, 250wpc class A/B was way better than 60wpc Class A Picked up a really cheap used Hifiman Adapter for like $20, just need to try some different resistor networks to replace the Hifiman ones in there.