Pathos In-Power MkI Monoblocks - As Traded

Pathos In-Power MkI Monoblocks - As Traded

Condition: Fair, marks and scratches (see photos)

Includes: Power cables only (no boxes)

SN: 230089 / 230089A

Made in Italy

Overview

Following Pathos Acoustics Design Philosophy, where tubes are used in the voltage-gain blocks, Patho's In-Power monoblocks use Pathos' patented InPol Technology as the output stage, essentially a passive current source is used in conjunction with the output transistors.

Because the output stage is essentially two Single Ended current amplifiers in one, it's unable to sink current below zero, so higher impedance speakers are a must to avoid clipping. A passive preamplifier is all you would need thanks to the high gain. The silver internal wiring is point to point.

Designer Gianni Borinato describes the In-Power as a balanced, double INPOL power amplifier, with zero-feedback, hand-matched. The MOSFET output stage is biased to run in class-A. Interestingly, and in a bid to minimise distortion, the input stage's two triode tubes are wired in opposite phase to form a double triode. 

A directly coupled output stage, with no caps in the direct signal path of the speakers means there is no pop in the speakers when switching the amp on.

Specification 

Type: Entirely balanced, Double INPOL power amplifier in pure class A
No global Feedback used
Output power: 80 W @ 8 Ohm
Input impedance: 100 kOhm
Frequency response: 5Hz-60kHz ± 0.3 dB
Signal/noise ratio: >98 dB
THD: < 0.4% up to maximum power
Power Consumption: 300 W