SL-A32 provide high-performance, thermally efficient amplifier solutions. it delivers 2x15W+15W  into 8Ω loads. it is three channels amplifier ,one channel  is L and R channel combined.with good sound.
it operate from a single 8V to 18V supply and provide a high 67dB PSRR, eliminating the need for a regulated power supply. They offer up to 90% efficiency from a 12V supply.
Both devices feature eight-digitally-controlled gain settings.

• Output Power: Maximum 2*15W+15W at RL=8Ω,VCC=18V
• Power efficiency is up to 90%
• Low Working Voltage Down To 8V, High Working Voltage up To 18V
• Thermal Protection function
• Output Pin Short-Circuit Protection
• Separate VCC & PVCC
• Class-D stereo audio design
• Components use SMT decal, the board dimension is very small
• IC decal is 36-TQFN
• No external heat-sink, Less heat, save heat sink cost
• The current is very small
• Mute function
• The PCB design provides both bead and LC solutions

L+R+L+R configuration
volume control with switch function
bluetooth function:

Bluetooth 3.0+EDR compliant

Typical +2dBm Class 2 output power

 Receiver Sensitivity: GFSK typical -90dBm

 Build-in High performance stereo codec

 Cap-less headphone driver

 Audio DAC: 93dB SNR

 HSP, HFP, A2DP, AVRCP 1.0 ,GAVDP profile support

 

 I/O port: PIO, UART