&lt;p&gt;TOA a manufacturer with a history of more than 70 years of specializing in audio products now introduces a basic amplifier package that includes the features and functions best suited for background music and paging applications. &lt;br /&gt;&lt;br /&gt;The TOA A-230 is designed to deliver consistently high-quality performance levels along with easy installation and simple operation. Bass and treble tone control functions make the sound clear and comfortable to listen to while Mic 1 auto-muting facilitates announcements at any time with a quick return&lt;br /&gt;&lt;br /&gt;Specification  &lt;br /&gt;Power Source 220 - 230 V AC or 12 V DC  &lt;br /&gt;Rated Output 30 W  &lt;br /&gt;Power Consumption 34 W (AC operation at IEC60065)  &lt;br /&gt;Current Consumption 4.5 A (DC operation at rated output)  &lt;br /&gt;Frequency Response 50 Hz - 20 kHz  &lt;br /&gt;Distortion 1 % or less at 1 kHz 1/3 rated power  &lt;br /&gt;Input MIC 1 - 3: -60 dB* (1.0 mV) 600 &amp;Omega; unbalanced phone jack AUX: -20 dB* (100 mV) 10 k&amp;Omega; unbalanced RCA pin jack  &lt;br /&gt;Output Speaker out: Floating balanced High impedance: 330 &amp;Omega; (100 V) Low impedance: 4 &amp;Omega; (11 V)  &lt;br /&gt;S/N Ratio 60 dB or more (MIC 1 - 3) 70 dB or more (AUX)  &lt;br /&gt;Tone Control Bass: -10 dB at 100 Hz Treble: -10 dB at 10 kHz  &lt;br /&gt;Muting MIC 1 overrides other Mic inputs and AUX input with 0 - 30 dB attenuation attenuation by MIC 1 input  &lt;br /&gt;Indicator Power LED Signal LED  &lt;br /&gt;Finish Panel: ABS resin black Hair Line &lt;br /&gt;Case: Steel plate black  &lt;br /&gt;Dimensions 350 (W) ? 105 (H) ? 240 (D) mm (13.78 ? 4.13 ? 9.45)  &lt;br /&gt;Weight 3.5 kg (7.72 lb)  &lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;&lt;table class=features&gt;&lt;thead&gt;&lt;tr&gt;&lt;th colspan=2&gt;Features&lt;/th&gt;&lt;/tr&gt;&lt;/thead&gt;&lt;tbody&gt;&lt;tr&gt;&lt;td class=feature&gt;Type&lt;/td&gt;&lt;td&gt;Mixer Amplifier  &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Power Output&lt;/td&gt;&lt;td&gt;30  &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Weight&lt;/td&gt;&lt;td&gt;3.5  Kg&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Dimensions W x D x H&lt;/td&gt;&lt;td&gt;350 x 105 x 240 mm&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class=feature&gt;Warranty&lt;/td&gt;&lt;td&gt;1 Year  &lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;