Change from the original S300 to S300+
Damping Factor: 1500 to 4000.
Upgraded internal material.
Upgraded speaker terminals to WBT-0703Cu.

All Features
2 OZ Copper PCB for Power Layer, Ground Layer and Signal Layer to get high damping factor and get more sound quality.
130 watts x2 @ 8 ohm continuous output power / Maximum output power 240 watts x2 @ 8 ohm
225 watts x2 @ 4 ohm continuous output power / Maximum output power 300 watts x2 @ 4 ohm
410 watts x1 @ 8 ohm in bridge mode
High bias Class A/AB operation
5 watts per channel of pure Class A power at high bias setting
45 amperes peak current per channel
Stable with speaker impedance dips below 2 Ω
Operation model selection: Stereo, Bi-Amp, Bridged
Dual-mono design
Direct-coupled signal path, no capacitors or inductors
DC Servo and relay protection circuits
JFET input stage, MOSFET driver stage
1.2 kVA toroid power transformer with independent secondary windings for each channel
Independent power supplies for left & right channel input stages, driver. stages, output stages
65,600 µF Rubycon filter capacitors for output stages
Automatic turn-on by 12 V trigger
Neutrik locking XLR input connectors
Heavy-duty 24K gold-plated RCA input jacks
Heavy-duty 24k gold-plated 5-way speaker binding posts
AC turn-on inrush surge protection
Overload/Over Temperature Protection
The 4mm thickness of the aluminum chassis to effective to blocks EMI/RFI interference