The INT-250 utilises the synergies developed in the .8 series power amplifiers. It brings 250 watts per channel of listening pleasure. With higher power MOSFETs and more of them, the INT-250 drives large, demanding and relatively inefficient loudspeakers at higher volumes without batting an eyelash, singing beautifully. Just incredible music from one component.
The INT-250 is not literally identical to its stand-alone counterpart the X-250.8. Nevertheless, the essential details that deliver the sound of the .8 series have been tweaked in subjective testing, and the result is very close. There are a couple new wrinkles to the “preamp” portions of these two products. The volume control circuit outputs are buffered by 6 dB gain stages whose input JFETs present many megohms of load, getting attenuator distortions down below the .001 % line. The extra gain allows optimal figures for the power amp stages, and offers improvement over the previous “passive” circuits.
The output noise figures of the integrated amplifiers are a little higher than the stand alone amplifiers, but after you figure in the noise of a separate preamp external to the amplifier, it comes out about the same, so you don’t lose out on noise performance.