Dual-Mono Esoteric F-05 Integrated Amplifier Delivers Reference-Class Separates Performance: Features Flagship Technology, Proprietary Volume Control System, and MM/MC Phono
The fully balanced preamplifier section in the Esoteric F-05 integrated amplifier directly derives from the company's $35k Grandioso C1 model. The amplifier modules come straight from Esoteric's $26k S2 amp. And that's just skimming the particulars of a Japanese-built reference instrument that gets you dangerously near the level of performance mustered by its six-times-more-expensive sibling separates. Entirely dual-mono throughout, the 240Wpc F-05 features a proprietary Quad Volume Control System responsible for see-through clarity, wondrous channel separation, and spot-on-accurate phase traits. Tailored to deliver music's unforgettable expressiveness and soul-baring emotion with uncommon rapture, F-05 also includes gargantuan power supplies in the form of large-core 940VA custom El power transformers and 40,000µF block capacitors for each channel. A dual-mono MM/MC phono preamplifier, abundantly dynamic headphone amplifier, three-band tone control, and ball-bearing control knobs help complete a component second-to-none in its class when it comes to fit, finish, and pride of ownership. 100% Money-Back Guaranteed.
"The Esoteric F-05 integrated amplifier is a true standout with exemplary performance well beyond its price point."
– Positive Feedback
Dual Mono by Design
The design feature of F-05 that most clearly reflects its Grandioso peer relates to its dual-monaural configuration, which maintains complete left and right channel independence through all stages, from preamplifier to the power amplifier's final stage. The major investments made in circuit construction expertise and materials developed over the years yield excellent channel separation and a measure of sound quality that transcends the class.
QVCS: Proprietary Quad Volume Control System and Logic Control
Esoteric's proprietary Quad Volume Control System (QVCS) incorporates four precision-switched resistor ladder networks operating in unison to electronically and independently control the left and right channels and their positive and negative phases. This system helps maintain superb audio clarity, excellent channel separation, and highly accurate phase characteristics. And by eliminating all volume control wiring on the audio board, the shorter signal path minimizes deterioration of sound quality while realizing exceptionally low distortion. Furthermore, as a countermeasure against noise, all control lines are electronically separated from the main body of the preamplifier with the use of isolator elements integrated into the front panel.
Large-Capacity Custom Power Transformer
F-05's power supplies feature large-core 940VA custom EI power transformers and 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 120W at an 8Ω load to 240W at 4Ω for faithful reproduction.
Three-Band Tone Control (Treble/Middle/Bass)
Commitment to achieving all the quality associated with high-end separates results in 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 signal. Fully electronic control also permits fine adjustment of up to ±12dB in 0.5dB steps. The middle band can also be utilized as a loudness preset when set to the minus side and used in conjunction with the Tone Bypass switch.
Low Impedance for Enhanced Drive Capability
Utilizing eight 1mm-thick bus bars comprised of high-purity OFC, the speaker output section employs MOSFET switching with no mechanical contacts. Coils are eliminated from the output stage to minimize impedance and enhance drive capability.
High-Precision Ball Bearing Control Knobs
Employing the same high-precision bearing mechanisms used in our Grandioso components, F-07's volume control knobs and selector switches provide exceptionally smooth operation with an analog feel free of any mechanical play. All panel knobs are custom-machined from solid aluminum.