This might have already been covered, but do you have another source besides the turntable? CD player or streamer to hookup to the Luxman 509x and check, if the same distortions are heard on same tracks?
that is what I would do before getting new speakers.
Are you using the phonostage in your 509x? If you are that is probably not so good match with a low output Koetsu. The loading of 100 ohms is probably not optimal for that cartridge. I know it was not for my Ortofon Cadenza Black. You probably need 400 ohm loading.
That cartridge with is 5 ohm internal impedance is perfect for a trans impedance type phone stage such as a Sutherland Little Loco. That is what I currently use. It is amazing!
You could always go the route of a step-up transformer and then go into the MM of the Luxman. I have used Bob’s devices in the past and they are awesome quality too.
Jason
that is what I would do before getting new speakers.
Are you using the phonostage in your 509x? If you are that is probably not so good match with a low output Koetsu. The loading of 100 ohms is probably not optimal for that cartridge. I know it was not for my Ortofon Cadenza Black. You probably need 400 ohm loading.
That cartridge with is 5 ohm internal impedance is perfect for a trans impedance type phone stage such as a Sutherland Little Loco. That is what I currently use. It is amazing!
You could always go the route of a step-up transformer and then go into the MM of the Luxman. I have used Bob’s devices in the past and they are awesome quality too.
Jason