STUDIO N-8

DESCRIPTION

Dual mono class D power amplifier based on two PURIFI 1ET7040SA. Each module 1ET7040SA is supplied by one Hypex SMPS1200A400. The front-end board is the EV produced by Purifi, based on dual OPA1612 opamps. It is possible to bypass the pre-gain stage to have an even more neutral and transparent sound.

Compared to the 1ET400A module, the new Purifi 1ET7040SA achieves more power and dynamic and it is more musical and less tiring. The amplifier, like the Hypex NC1200, has a great authority in driving the most hungry speakers.

NEUTRAL AND CLEAR POWER AMPLIFIER

SPECS

Output Power: 2x950W(2Ω), 2x500W(4Ω), 2x250(8WΩ)
Output Current (each channel): ~40A
THD+N: <0.00035% @ 200W, 4Ω, 1kHz
Dynamic Range: ~129 dB(A)
Output Noise: ~14µV(A)
Gain: 27dB (13dB with pre-gain disabled)
Differential Input Impedance: 10.2 kohm (4.4kohm with pre-gain disabled)
Output Impedance: <13µΩ @ 1kHz
Efficiency: 94% @ 500W, 4Ω, 1kHz
Idle losses (output stage): 2.8 W

PRE-GAIN STAGE SETTING

The pre-gain stage based on dual OPA1612 can be bypassed using special jumpers . When the pre-gain stage is bypassed, both the amplifier gain and the input impedance are reduced.

ACTIVE PRE-GAIN: total gain = 27dB, differential input impedance = 10.2kohm

PRE-GAIN DISABLED: total gain = 13dB, differential input impedance = 4.4kohm