Short answer: No. Guitar amps are weird, not like hi-fi amps at all. In a hi-fi amp, distortion is the enemy. In a guitar amp, distortion is sought after. Driving the pre-amp section of a guitar amp into clipping is extremely common and desirable. Doing the same with a hi-fi amp is not. A hi-fi amp will be typically connected to speakers with a woofer and a tweeter and maybe a mid-range, trying to accurately reproduce all frequencies. A guitar amp typically has nothing but 12 inch speakers. A guitar amp is literally half the instrument. Plugging a guitar into a hi-fi amp is faithfully amplifying 1/2 of an instrument. You'll end up buying a guitar amp anyway. Just get a guitar amp.