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ESOTERIC Integrated Amplifier Grandioso F1
Integrated Amplifier Grandioso F1
Introduction
Introduction
Features
Features
Specications
Specications
Gallery
Gallery
The flagship model of Esoteric integrated amplifiers for the next dimension in sound

  • Stereo "Best Buy Component 2017"
    Integrated amplifier category (above 700,000Yen)
    The third prize

F1

Master Sound Works

Audio expression, symphonic beauty, artistic passion, the concert hall's spatial feel, the excitement of the audience. Esoteric's Master Sound Works is an audio product concept that recreates all of the music information in original master recordings with the most state-of-the-art technology available today.
F1

K1 F1 G1

go Grandioso K1

go Grandioso G1

Pure Performance

Preamp

Fully balanced dual mono preamp / Dual mono input amps

Fully Balanced Preamplifier

The Grandioso F1 is a fully balanced preamplifier that descends from the Grandioso C1. It is resilient to noise, and can amplify signals purely and powerfully with low impedance.

Dual Monaural Configuration

A dual monaural configuration with separate left and right sides has been adopted for all stages; from the preamplifier stage to the final stage of the power amplifier. The inclusion of the largest amount of materials ever used in the circuits of an all-in-one Esoteric amplifier ensures both superior sound quality and channel separation.

"ES-LINK Analog" Method for High Quality Current Transmission

In addition to regular line connections (XLR and RCA), the Grandioso F1 features the new "ES-LINK Analog" transmission method developed by Esoteric. This current transmission method utilizes the high performance of the HCLD buffer circuit and its enhanced ability to supply power at high-speed to transmit a pure and strong signal with minimal interference from the impedance of the signal route. This is the ideal method for analog audio transmission as it fully maximizes the system's potential when connected to a compatible device.*
*Included in the Grandioso K1 as of September 2016. A standard balance cable (with an XLR terminal) is used for connections, but the "ES-LINK Analog" method can only be used with compatible devices since it is a proprietary transmission method.

ESOTERIC-QVCS

The F1's Esoteric-QVCS* volume control employs four precision switched resistor ladder networks, which change in unison as the volume knob is rotated. This arrangement allows the signal paths for the left and right channels and their positive and negative phases to be kept totally independent and as short as possible. Consequently the sound has superb clarity, excellent channel separation and highly accurate phase characteristics. The elimination of audio board wiring to the volume control further contributes to a reduced signal path, while preventing degradation of sound quality and helping to maintain the low distortion one would expect of a reference model.
*QVCS = Quad Volume Control System

Ultra Low Noise Logic Controls

All control systems in the Grandioso F1 are electrically separated from the main preamplifier using isolator chipsets and contained in the front panel to effectively minimize noise.

High Precision Ball Bearing Control Knobs

High Precision Ball Bearing Control Knobs High Precision Ball Bearing Control Knobs Front panel

Employing the same high-precision bearing system used in our VRDS transport mechanisms, the F1's volume control knob and selector switch provide exceptionally smooth operation with an analog feel free of any mechanical play. Sparing no cost, the front panel and all panel knobs are custom-machined from solid aluminum.

Dual Mono Phonostage Preamp

The dual mono phonostage preamp (MM/MC) features independent left and right channel power sources and independent circuits.

High-Quality Headphone Amplifier

The powerful headphone amp provides abundant output to effectively drive even difficult to power high-end high-impedance headphones.

3-Band Tone Control (Treble/Middle/Bass)

3-Band Tone Control Commitment to achieving all the quality associated with high-end components results in a balanced dual monaural configuration consisting of four circuits (L/R, -/+) for each band. This system enables users to adjust tone settings free of any concerns about sound quality deterioration. Shifting the variable band more than usual toward the high and low frequency ranges (14kHz/63Hz) permits fine adjustment of bass and treble without adversely affecting the original source signal. Fully electronic control also permits fine adjustment of up to ±12dB in 0.5dB steps.

Power, Dynamics

Power Amplifier

"ESOTERIC MODEL200" Next-Generation Silicon Carbide MOSFET

Silicon Carbide MOSFET

Each year it is becoming harder to obtain discrete parts with excellent audio quality. That is why Esoteric, which prides itself on in-house production, decided to collaborate with New Japan Radio Co., Ltd. to develop a proprietary MOSFET device that meets stringent sound quality and performance standards. After more than two years in development, we finally completed our first proprietary MOSFET for the Esoteric brand, called the ESOTERIC MODEL200.
The ESOTERIC MODEL200 is a dedicated MOSFET device for the power amplifier output stage that uses a next generation power device and the widely lauded high-tech material called silicon carbide (SiC). Since it features lower capacity and lower loss than regular silicon devices, its current tolerance performs amazingly well in benchmarks, with a maximum instant current of 150 A and continuous current of 78 A. Since it can freely control a large current with quick startup, it is excellent for driving low-frequency ranges and provides powerful playback of music. Furthermore, its greatly improved transient response provides extremely low noise with high-frequency ranges for lively and vibrant sound throughout the entire audio spectrum. This is the ideal MOSFET device for a flagship model, due to its ability to powerfully, flexibly and naturally follow the dynamics of ever-changing music.

Parallel Push-Pull, Class A, 30W+30W(8Ω)

Power amplifier modules

The Grandioso F1 adopts a newly-designed parallel push-pull Class A power amplifier circuit to bring out the most of the ESOTERIC MODEL200 silicon carbide MOSFET. This faithfully adheres to the Esoteric amplifier philosophy of using impressive quantities of the finest materials while adopting a minimal circuit configuration to ensure the shortest signal route, and achieves both pure amplification and speaker drive ability rivaling that of separated models.

Balanced Power Amplifier Input Stage

The front stage of the power amplifier has been balanced to achieve clean amplification at low impedance and further increase the dynamic range heard by the listener.

Large-Capacity Custom Power
Transformer - The Heart of the Finest Power Amplifiers

Power supply As one of the most important factors in deciding an amplifier's ultimate sound quality, the F1's robust power supply plays a critical role in its ability to deliver high power in a linear manner. The power supply's large 1,000VA toroidal transformer provides the foundation for the F1's exceptional power output. With the knowledge that an amplifier's sound quality is ultimately determined by the quality of its power transformer, the F1 employs a custom power transformer that demonstrates Esoteric's highly developed expertise in material selection, core size and even mounting technique.
The power supply also features 40,000µF block capacitors for each channel in a dual monaural configuration. Large-gauge cable is used in all connections to help minimize impedance. This outstanding power section achieves a theoretically linear power output ranging from 30W at an 8Ω load to 60W at 4Ω for faithful reproduction of every musical dynamic.

Low Impedance for Enhanced Drive Capability

The speaker output section utilizes eight 1mm-thick bus bars formed of high-purity OFC and MOSFET switching with no mechanical contacts. This design minimizes signal impedance and enhances drive capability of the F1.

Other Features and Functions

3D Optimized Chassis Construction

3D Optimized Chassis Pinpoint feet The F1's 3D Optimized Chassis features robust construction that gives each circuit block its own dedicated compartment. Interference between circuits is effectively minimized while achieving the shortest possible cable routing. Chassis exteriors are formed of thick aluminum panels manufactured without compromise following the same design philosophy imbued in Esoteric's separate amplifiers. As a result, the F1 achieved a extremely heavy-duty construction not normally found in conventional integrated amplifiers. Our patented steel pinpoint feet* support the F1 at four points in order to minimize the negative effects of vibration.
*Patent No. 4075477

Optional Board Slot

A card expansion slot facilitates the installation of an optional "OP-DAC1" D/A Converter Board, which adds full compatibility with 11.2MHz DSD and 384kHz/32-bit PCM signal inputs.

  • Organic EL display (Normal / Large font).
  • Independently adjustable input gains (±18dB; 0.5dB steps).
  • L/R channel balance.
  • Individually selectable phase inversion for each source.
  • Aluminum body remote controller can also be used to operate
    Esoteric's SACD players.
  • Displayed source device names can be programed.
  • Mute, dimmer and automatic display OFF functions.
Organic EL display
Remote control

F1 Front view

F1 Rear view

Speaker output Output 30W + 30W (8Ω)
60W + 60W (4Ω)
Total harmonic distortion
(1kHz, 8Ω)
0.009% (30W)
Frequency response
(+0/-3.0 dB at 1W output)
10Hz - 150kHz
S/N ratio (at 30W/8Ω, JEITA) ES-LINK Analog, XLR, RCA inputs 103dB
PHONO (MM) input 101dB
PHONO (MC) input 82dB
Damping factor 100
Minimum compatible impedance
Speaker output connectors 1 pair (L/R, screw type)
Headphone output Output (32Ω, 10% distortion) 1000mW
Headphone jack x 1
Inputs Terminals (L/R) ES-LINK Analog x 1
XLR x 2
RCA x 3
PHONO (MM/MC) x 1
Input impedance ES-LINK Analog - (current input)
XLR, RCA 10kΩ
PHONO (MM) 47kΩ
PHONO (MC) 100Ω
Gain Preamplifier 24.5dB (when VOLUME at maximum)
Power amplifier 35dB
Tone controls BASS  tone curve ±12dB (63Hz)
MIDDLE  tone curve ±12dB (630Hz)
TREBLE  tone curve ±12dB (14kHz)
General Power supply AC 230V 50Hz
AC 120V 60Hz
AC 220V 60Hz
External dimensions
(W x H x D)
445 x 191 x 470mm
(17 5/8″ x 7 5/8″ x 18 5/8″)
(including protrusions)
Weight 30kg (66 1/4 lb)
Included accessories Power cord x 1
Remote control (RC-1315) x 1
Batteries (AAA) x 2
Felt pads x 4
Owner's manual x 1
Warranty card x 1
- This product is available in two different power supply variations as shown in the chart above.
Make sure that the voltageshown on the rear panel matches the AC line voltage in your area.
- The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.
- Specifications and appearance are subject to change without notice.
- Weight and dimensions are approximate.

F1 F1 F1
F1 F1 F1
F1 F1

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