FM Acoustics Resolution Series 115FM Acoustics  Resolution Series 115 Monoblock Amplifiers Grand Prix Award Winner!!!!!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 and have won the Grand Prix Award We h...49000.00

FM Acoustics Resolution Series 115 Monoblock Amplifiers Grand Prix Award Winner!!!!!

Listing ID: lis83eja Classified 
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FM Acoustics
Time Left: 15 Days


Asking Price: $49,000.00

New Retail Price: $130,000.00

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Ships fromLaughlin, 89029
Ships toWorldwide
Package dimensions48.0" × 42.0" × 24.0" (236.0 lbs.)
Shipping carrierUPS
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Original accessoriesBox, Manual
Agon miniAverage Research Pricing

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 and have won the Grand Prix Award  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. Partial trades may be considered.

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:

140 Vpp

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:

3 uS

Hum and Noise:

Minimal unweighted:

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.

Input Sensitivity:

1.2 V RMS for full output

Input Impedance:

At all level settings from balanced and unbalanced sources:

40 kOhm

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)

Load Impedance:

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


Questions for the seller
Is the preamp also available, if so at what price?
Hello, Sorry but we sold the preamp already. we had a few. 255 MKII and a 245 but both have sold
Are you the original owner? Does this price include the special speaker cable? Thanks.
Yes . And yes I am including a 3 meter pair of FM Acoustics Forceline 3 speaker cables.
Exactly how many years has this been used? Is there warranty still on this unit?
Hello, these amplifiers we have owned for about 5 year. The only way to get warranty on FM Acoustics products is by purchasing brand new products from them. They do not honor warranty on items sold on the used market. However it is very reliable equipment. We had a 30 year old FM Acoustics 611 which worked as good as new.
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Seller Information

Audio Limits  Verified Dealer

Last 12 months

Member since November 2009