It is best to use a preamp with any cdp, I have a Accuphase dp-75 and have used it staight into my amp with great results, but adding a preamp has always improved the dynamics and the you are there feeling that a direct cdp input cannot achieve.A direct input will always impress you with great detail,but after inserting a quality preamp there is no going back.An amp requires the large voltage swings of a preamp to achieve its maximum performance and most cdps do not have this ability. My cdp can output 2.5 volts and my amp has a sensitivty of just 350mv which should be more than an adequate ratio for great performance, but a high quality preamp can swing upward of 25 volts which is what an amp needs to perform at its maximum.You will be able to play your cdp directly into your amp and enjoy the sound and with an Accuphase cdp I am sure it will sound great, but just remember there is better sound to be had when you add a high quality preamp.
Mike
Mike