Densen B-150 Plus Integrated Amplifier

  • The new reference integrated amplifier from Densen is perhaps the most advanced integrated amp on the market. It is filled with advanced solutions, which all share the goal of giving you even more musicality and flexibility.

    The volume is controlled by an extremely precise attenuator made of Vishay metal film resistors, which is switched by relays controlled by the microprocessor. Compared to a normal volume potentiometer of the kind used in the majority of all pre-amps, the resistor network has virtually no self induced noise and an extremely low distortion. This results in an unsurpassed precision and refinement, and the attenuator contains no less than 200 steps! This makes it possible to adjust the volume very precisely (0.5 dB) even when the sound is so low that an ordinary volume control would create an uneven balance between left and right.

    The B-150XS output stage utilizes Densen’s unique ”DMCD” (Densen Mass Current Distribution) technology. The B-150 is, as with all other Densen amplifiers, The DMCD technology also secures an extremely firm grip on the speakers combined with a fast, precise and truly transparent sound. As the B-150XS is a wide bandwidth design it goes to 400.000Hz, resulting in improved slew-rate.

    The B-150XS is built using surface mounting techniques, and the components are mounted with a precision of 0.02mm (!) using silver solder. All solder rings are made in an artificial atmosphere, consisting of nitrogen, to avoid oxidation of the solder rings. The power supply is massive, consisting of a 750VA transformer and having a storage capacity of 130.000uF with 4 separate rectifiers, two of which are capable of 3.000VA. Unusually for an amplifier, not all of the capacitors are mounted in a capacitor bank, as some of them are located directly adjoining the output stage for faster power delivery. All resistors are laser trimmed metal film from Vishay with a precision of 0.1%. The B-150XS delivers 100W in 8 ohm and 200W in 4 ohm.

    The transformer is custom-made for the B-150XS, and is winded using a new technique. This technique reduces vibration from the transformer and therefore reduces mechanical noise from the cabinet. At the same time, this prevents mechanical vibrations from reaching the delicate audio signals on the PCB. It also works as an isolation transformer, thereby eliminating the need to use separate power conditioners.

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