The First One V1.2 DIY Amplifier

[solidstate]

An interesting DIY amplifier I'm going to order and figured I'd share it here.

www.diyaudio.com/forums/vendors-bazaar/248996-first-one-mosfet-amplifier-module.html


Finally the First One mosfet amplifier module is ready to go to travel the world.

It has been a long testing and measuring period, just to make me sure the module is good enough to meet your expectations.

The First One V1.2 amplifier is a plug and play class AB module, current feedback type, ready made to the last detail, calibrated and tested.


Technical specifications:

Maximal power (20 Hz - 20 kHz, THD 0,1 %)
160 Wrms/8 Ohm
250 Wrms/4 Ohm

Maximal power (20 Hz - 20 kHz, THD 0,05 %)
150 Wrms/8 Ohm
230 Wrms/4 Ohm

THD (100 Wrms/4 Ohm, 10 kHz)
0,004 %

THD (100 Wrms/4 Ohm, 100 Hz)
0,0034 %

IMD (80 Vpp/4 Ohm, 19+20 kHz)
0,003 %

THD (1 Wrms/8 Ohm, 1 kHz)
< 0,0016 %

Frequency response (-3 dB)
3 Hz - 3 MHz

Slew-rate
240 V/us

Signal to noise ratio
> -110 dB

Voltage gain
+27 dB

Input impedance
10 kOhm

Output impedance (20 Hz - 20 kHz)
< 10 mOhm

Damping factor (100 Wrms/4 Ohm, 20 kHz)
> 2000, measured on PCB output terminals

Output DC offset
< +/-5 mV

Supply voltage
+/-40 V to +/-63 V

Size - dimensions (W x D x H)
100 x 50 x 40 mm

First One (Big brother to the "Very Simple Symmetrical Amplifier, something in between SSA and TSSA" from LazyCat)