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Product Name
Denon PMASA1 Integrated Amplifier
[PMASA1]
price$14,999.00
Product Description
Denon PMASA1 Integrated Amplifier

Balancing dynamic power and delicate details in sound, the fruit of many years of DENON audio technology and experience.

The "S1 Series" that appeared in 1993 was a reference-class audio series designed to please the most discerning of all audiophiles. The primary objective of the S1 Series was to reproduce "reality"---- a deeper, more natural sound. Continuing the same quest for high-quality sound reproduction that the S1 Series had been pursuing, the PMA-SA1 combines the latest audio technologies with the reliability that DENON's amplifiers have earned over the past 10 years. From the external design to the details on the inside, the PMA-SA1 has been developed as a member of the new SA Series embodying the essence of DENON's advanced audio technologies. With new advances in audio formats and the ability now of many households to enjoy multi-channel sound in their own home theatres, "authentic sound" is in even greater demand. The SA Series represents DENON's latest offering of possibilities in pure 2-channel audio for today's most dedicated music lovers.

UHC-MOS, the ideal large-current amplifier
The ideal amplifier uses a minimum number of amplifier elements to control output current. Obtaining large output from simple circuitry, however, requires elements capable of handling incredibly large current. Since its development of the POA-S1, DENON has been employing the UHC-MOS large-current amplifier element in its amplifiers. DENON's UHC-MOS uses single push-pull technology to configure the ideal circuit for a large-output amp. The UHC-MOS has a gain that is even higher than that of bipolar transistors; with a single element, the UHC-MOS achieves the current linearity of 35 MOS-FETs and 3 bipolars. The UHC-MOS incorporates the capability of MOS-FETs to reproduce the delicate nuances of music and thus masterfully reproduces the full sonic range, from the sound of a violin solo that gradually tapers off into the acoustics of the hall, to the dramatic climax of a full orchestra that causes heaven and earth to tremble. Cascode Bootstrap Connection, to bring out the maximum potential of UHC-MOS

This UHC-MOS that boasts large current and superior linearity on its own suffers from low pressure resistance and large junction capacity. Solving these shortcomings is the Cascode Bootstrap Connection, a technology that ensures stable operation and brings out the UHC-MOS's outstanding conversion characteristics. The cascode boostrap circuitry maintains voltage to the UHC-MOS at a constant level and solves the size of junction capacity. In addition, it vastly improves temperature stability to successfully stabilise and bring out the superior acoustic characteristics of the UHC-MOS.

Simple amplifier stage configuration
The cascode boostrap circuitry in the PMA-SA1 achieves ideal characteristics at the power amplification stage and ensures stable operation. This solution simplifies the configuration of the power amplification stage and allows the amplifier to reproduce music with total purity. The stable operation and drive capabilities of the UHC-MOS also help eliminate sources of resistance that degrade the quality of the musical signal. This produces a circuit configuration in which the output stage, equipped with powerful drive capabilities, is directly connected to the speakers.
All-stage balanced amp configuration, to protect clarity of musical signals
The PMA-SA1 has achieved a balance among all stages. Since a balanced configuration makes it possible to keep internal voltage at a low level, superior devices for low voltage can also be used. Furthermore, since noise and interference between circuits can be suppressed and output current to the speakers is completely separated from the ground circuit, the speakers are driven purely by the output stage, giving the PMA-SA1 superior drive capabilities. The resulting sound features a truly realistic spatial expression and the music is full of life.
Inverted ∑Balance Circuit, realising a balanced amp for high sound quality
The PMA-SA1 is endowed with an Inverted ∑Balance Circuit that supports both balanced and unbalanced input. This design does not require separate conversion circuits in the preceding stage but allows the signal to be input directly to the power stage in a balanced configuration. Along with the UHC-MOS of the output stage, this circuit adheres to the principle of "simple and straight" to ensure a beautiful, transparent sound.
High-grade 50-diameter volume control for superior sound quality
Sand-cast transformer case and capacitor holder
Robust power supply for each section
Precision Signal Ground Circuit, to preserve signal purity
Fully independent phono equaliser amps
Chassis construction with 6 independent blocks
"Simple & Straight" circuit design
Generous use of large gold-plated speaker terminals and other parts selected for high sound quality
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