PA-1175 MKII
200W Italian Power Amplifier — Bridgeable to 520W Mono BTL
Descripción ⌄
GoldNote PA-1175 MKII — reference Class-A/B stereo power amplifier. Stereo Class AB power amplifier delivering 200W per channel at 8Ω, or 520W in mono BTL bridged mode, with proprietary optical BIAS voltage control technology. THD <0.01%, SNR 110dB, frequency response 1Hz–100kHz with selectable damping factor (250 or 25). Weighs 20.5kg with 640VA toroidal transformer and both RCA and XLR balanced inputs.
Technical background
GoldNote power amplifiers use proprietary Optical BIAS control — monitoring output transistor bias continuously via infrared sensors rather than mechanical trimmers — for drift-free long-term stability across all operating temperatures. Selectable damping factor (250 or 25) adapts bass control to different speaker types. The P-1000 mkII preamplifier adds three independent linear power supplies filtered by military-derived noise-cancelling coils, and a 100-step ALPS optical encoder volume control with 0.5dB resolution.
Design story
GoldNote's amplifier development has always prioritised long-term real-world stability. The Optical BIAS system — developed after observing that conventional bias trimmers drift with temperature and age — continuously corrects output transistor operating point using infrared sensors. The P-1000 mkII chassis is machined from a single aluminium billet, with three fully independent power supplies filtered by coils derived from helicopter avionics noise-cancellation technology, making it the most mechanically and electrically isolated preamplifier in the GoldNote range.
Best for
Serious system builders wanting a high-power Italian power amplifier; P-1000 mkII owners adding a matched power stage; XS-85 or A6 Evo II owners wanting more drive Serious system builders wanting a high-power Italian power amplifier; P-1000 mkII or XS-85 owners wanting a matched power stage Reference power stage: PA-1175 mkII + P-1000 mkII + DS-1000 Evo Line or CD-1000 mkII DSD + XS-85 or A6 Evo II
Awards & press
⭐ N/A "The PA-1175 MkII offers the audiophile two distinct amps in one due to its unique Damping Factor function." — Doug Schroeder, Dagogo, January 2019
Características ⌄
- Class AB power amplifier with proprietary optical BIAS technology and selectable damping factor — 200 W/ch stereo, 520 W/ch mono BTL, SNR 110 dB, THD <0.01%
- Bridgeable to 520W mono BTL for demanding loudspeaker systems; toroidal transformer with spiral core design for maximum headroom and minimal interference
- Selectable damping factor (250 or 25) adapts the amplifier to different speaker types and room conditions for optimal bass control
- Bridgeable to 520W mono BTL — pairs with a second PA-1175 mkII for fully active monoblock operation
- Dagogo Jan 2019: 'the PA-1175 MkII offers the audiophile two distinct amps in one due to its Damping Factor function'
- Selectable damping factor 250/25 — high setting for tight bass control, low for a more relaxed tube-like presentation