if your a318b is anything like my a205a mkll, i can understand your affection.

i have another pair of amps that use the 6c33c tube, & they're also great, so i imagine the almarro iteration is as good as everyone says, especially, if you need more power.
you could do what i do, & yust use the almarro as an amp, w/its gain max'd. (or bypass the wolume pot completely.) get a nice preamp, feed it to an active x-over, hi-pass the almarro driving the mains; subs/sub amps on the low-pass... you will find this will improve the sound of your mains as well, if they don't have to see anything below 40-80hz. (depending on your x-over setting/speakers...) you will also find that a good preamp can improve the sonics as well - proper drive from the gain of a quality transparent preamp (i prefer tubed) is hard to beat, imo...
doug s.