At Audio Limits we are offering up for sale a pair of FM Acoustics 115 Monoblock amplifiers. These are considered by many to be the best amplifiers ever made. We have owned in the past the following FM Acoustics amplifiers FM Acoustics 811 MKII, FM Acoustics 711 MKII, FM Acoustics 411 MKII, FM Acoustics 611x and FM Acoustics 611. These are the best amplifiers out of all of them which is the reason we kept the 115 mono's the longest. They have been featured in many best of show reports just do a google search for Polymer Audio Research,Venture Audio, and YG Acoustics and you will find the blogs and reports from Axpona, Newport and RMAF. They have served as our Reference Amplifiers in our showroom for a few years now and sadly its time to let them go.
Audio Limits LLC
See Specs below
FM 115 is concepted for speaker systems that
demand an amplifier that can effortlessly provide high output
voltage and at the same time very high output current. Thanks to this
singular capability (amplifiers usually either provide high
output voltage or high output current but not both at the same
instant) it drives any speaker in an unparalleled manner.
The FM 115 employs complete Resolution Series technology and uses
advanced true balanced Class A stages combined with the world's best
amplifier and speaker protection systems.
A new feature unique to the FM 115 uses a unique new circuit that
detects and eliminates any potential very low level distortion.
Furthermore, it uses a new proprietary true balanced input stage
which automatically recognises if the input signal is balanced,
pseudo-balanced or unbalanced and converts these signals to true
- Like the FM 111, its smaller brother, the FM 115 can be placed
next to a speaker or in any remote location. It keeps all of the
features such as delayed turn-on, all protection circuitry
intelligence etc. even when power is switched on remotely. Within
ten seconds it is fully operational and sounds absolutely optimal
(unlike some other power amplifiers that need long warm up).
- The FM 115 is a dream come true for those who require the
ultimate single-channel high power amplifier with the unique
transparency and build quality the Resolution Series is world famous
Minimum Power Output:
operating with music or continuous toneburst:
550 Wpeak into 8 Ohm
1000 Wpeak into 4 Ohm
1800 Wpeak into 2 Ohm
275 WRMS into 8 Ohm
500 WRMS into 4 Ohm
900 WRMS into 2 Ohm
Max. Output Voltage:
Max. Output Current:
Unlimited repetitive peak output current. More than 35 A continuous.
No output or DC fuses, absolutely no form of current-, voltage- or any
other kind of limiting.
0,005% THD, no higher order harmonics Bandwidth including Input Filter:
Less than 1 Hz to 60 kHz; if required, internally settable to any
frequency between 1 kHz and 60 kHz (Low-Pass) and 1 Hz to 1 kHz
Risetime at Full Power -3db:
Hum and Noise:
better than -100 dB (20Hz-20kHz).
Proprietary electronically balanced discrete enhanced class A
circuitry, non-polarized, floating ground, non-inverting or inverting
mode. Optimal performance with either balanced or unbalanced
(single-ended) sources. Unbalanced sources are automatically
balanced right at the input of the FM 115.
1.2 V RMS for full output
At all level settings from balanced and unbalanced sources:
Input Stage Common Mode Rejection:
100 dB typically, better than 95 dB at 50 Hz, even better at other frequencies.
Maximum Input Level:
+20 dBm (20Vpp)
No minimum impedance.
The amplifier is designed for 1 Ohm to 10’000 Ohm systems.
It can drive any speaker impedance (even below 1 Ohm) with dynamic
(music) signals without any limiting, compression or other negative
effects on the audio signal.
Despite this, the amplifier is fully protected against short
circuits, open circuits and all other adverse conditions via unique
onboard circuitry that continuously surveys all important
Audio Limits LLC