Try turning bass boost OFF | iHome iP90 manual

Symptom	Possible Problem	Solution
Sound is distorted	Volume level is set too high	Decrease the volume
	Sound source is distorted	If the iPhone/iPod original sound source (MP3) is old or of poor quality,
		distortion and noise are easily noticed with high-power speakers. Try a
		different audio source such as a music CD.
		If you are using an external sound source like older generation of iPod
		or iPod Shuffle, try reducing the output volume on the device itself. Also
		try turning bass boost OFF.
	EQ settings are too high. For example, if the	Lower EQ settings.
	treble is too high, the 3D effect may not sound
	as good
Unit/adaptor gets	This is normal	Turn unit off for awhile or lower volume
warm after extended
play at high volume

Snooze time	Custom snooze time not set	Press and hold Snooze button then press + or - button to adjust
is too long/short

Alarm not working	AM/PM time/alarm time not set correctly	When setting clock or alarm time, take note of the AM/PM indicators
	Alarm time or source selected for alarm 2 , not	Make sure to set the alarm time and source for the alarm icon 1 or 2
	alarm 1 or vice versa	that is shown on the clock display
	7-5-2 days setting is not correct	7 days is every day alarm, 5 days is Mon-Fri, and 2 days is Sat-Sun. See
		page 3 for setting alarms.
	Calendar is not set correctly, which can affect	See page 3 for setting Clock/Calendar Section.
	7/5/2 day alarm operation

try turning bass boost OFF.