1. Overall Structure: NE5534 Pre-Amplifier + 0P07 DC Servo + C1237 Speaker Protection + TDA7293 Post-Amplifier, Reasonable Structure, Excellent Sound Quality, Stable And Reliable Operation.2. DC Servo/High Power/Stereo3. The Maximum Power Depends On The Power Supply Voltage And Speaker Impedance, =10%, RL=8ohm VS=±40V;4. If It Is A 4ohm Load, The Transformer Voltage Should Not Exceed Dual AC 20V To Avoid Unnecessary Losses;5. Please Pay Attention To Monitoring The Heat Sink Temperature During Use. If Necessary, It Is Recommended To Use A Fan To Assist Heat DissipationPower Supply Voltage:AC12-28V*2 (Dual AC)Power Supply:Above 200W RecommendedOutput Power:100W * 2 MaxOutput Impedance:4-16ohmAudio Channel:2 Channels, StereoCircuit Architecture:TDA7293+0P07+NE5534Advantages:PRE-Stage Regulated DC Servo Delay ProtectionProtection Characteristics:Overheating, DC, Short Circuit ProtectionNote:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The UseColour:As ShownMaterial:PCBPackage Contents:1 * Power Amplifier Board ModuleOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.