Audio preamplifier

The ornamental design for an audio preamplifier, as shown.

FIG. 1 is a perspective view of an audio preamplifier according to the present design;

FIG. 2 is an elevational view of the left end of the audio preamplifier shown in FIG. 1;

FIG. 3 is an elevational view of the right end of the audio preamplifier shown in FIG. 1; and,

FIG. 4 is a front elevational view of the audio preamplifier shown in FIG. 1.

Patent	Priority	Assignee	Title
D396860,	Mar 10 1997	Sony Corporation	Housing for a radio receiver and an audio data decoder
D417869,	Sep 11 1997	Sony Corporation	Electronic device
D420665,	Oct 22 1998	WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT	Portable amplifier

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