The Densen BEAT B-100 is an integrated amplifier designed for high-fidelity audio reproduction, with a focus on signal purity, robust power delivery, and user flexibility. It features a minimalist design with a non-magnetic aluminum cabinet and a 25mm acrylic front panel, contributing to its sonic performance by minimizing magnetic interference.
Function Description:
The BEAT B-100 serves as the central hub for an audio system, accepting multiple line-level inputs and providing amplified output to a pair of speakers. It incorporates an internal heatsink, with the cabinet itself acting as an additional heatsink, necessitating adequate air circulation for optimal operation. A key feature is its readiness for bi-wiring, allowing separate speaker cables for high and low frequencies to enhance signal purity. The amplifier also includes a pre-out for connecting external power amplifiers, such as the forthcoming BEAT B-300, for bi-amping configurations. Uniquely, its Line 1 input can be converted into either an MM or MC phono input using optional DP-01 MM or DP-02 MC boards, making it suitable for turntable users. For safety, the BEAT B-100 is equipped with an internal security circuit that monitors and protects against various faults, though it emphasizes user precautions against output-stage short-circuits and RF detection issues.
Important Technical Specifications:
- Input Sensitivity (All inputs): 280mV
- Input Impedance: 22 Kohm
- Frequency Response: 2-200,000 Hz (+0 -3db)
- THD + Noise @ rated output: Less than 0.01%
- Signal to Noise (Rated output, "A" weighted): More than 95 db
- Power Consumption:
- Minimum (idle): 10-15W
- Maximum: 250W
- Power Output (per channel):
- Power Supply Size (Transformer): 360VA
- Storage Capacity: 40,000uF
- Amount of Rectifiers: 2
- DC Output Offset (typically): Less than 40 mV
- Weight: 9.6 Kg
- Shipping Weight: 11.4 Kg
- Dimensions (WxDxH, excluding knobs and sockets): 440mm x 300mm x 68mm
DP-01 Technical Specifications (for optional phono board):
- Frequency Response: 20-20,000 Hz +0 -1db
- Signal to Noise ("A" weighted): 85 db
- Input Impedance: 47K
- Input Capacity: 100 pF
- Channel Separation: 90db
Usage Features:
- Inputs: The BEAT B-100 offers five line-level inputs (Line 1-5) and one tape input, accommodating various audio sources like CD players, tuners, RIAA-stages, TV-sets, videorecorders, and laserdiscs. The tape input can also function as an additional line input if needed.
- Speaker Outputs: Features outputs for one pair of speakers, with two 5-way binding posts per channel to facilitate bi-wiring.
- Ground Connector: Includes a dedicated connection for a ground wire, primarily for use with turntables to prevent hum.
- Phono Stage Option: Line 1 input can be upgraded to an MM or MC phono input by installing an optional DP-01 MM or DP-02 MC board. This involves removing the top cover and inserting the board into a dedicated slot on the circuit board, with specific instructions to short-circuit four golden pins with enclosed jumpers when the phono board is not in use.
- Tape Loop: Designed with an isolated tape loop to preserve sound quality, meaning tape monitoring during recording is not possible directly through the amplifier. Users are advised to monitor via the tape recorder's headphone output.
- Pre-Out: A passive pre-out is available for connecting external power amplifiers, suitable for bi-amping setups, particularly with power amplifiers designed for passive preamps (e.g., BEAT B-300).
- Mains Polarity: The "Phase" pin of the mains socket is marked to ensure correct power cord and plug polarity, which is stated to improve sound resolution.
- Front Panel Controls: Features a volume knob on the left and an input selector knob on the right. A red LED power indicator is located between the two knobs.
- Power Switch: Located on the rear panel, the power switch is primarily for disconnecting the unit for extended periods. It is recommended to leave the amplifier on at all times for optimal sound quality and simply turn down the volume when not in use.
- Safety Precautions: Users are warned against connecting inputs or outputs while the amplifier is ON and against the "thumb test" (touching cable ends while the amplifier is ON) to prevent damage to the amplifier and loudspeakers.
Maintenance Features:
- Cabinet and Knobs: Constructed from non-magnetic aluminum, with a 25mm acrylic front panel, chosen for their non-magnetic properties to minimize interference.
- Cleaning: Should only be cleaned with a soft, dry, or moist cloth. Users are advised to be careful not to scratch the acrylic front and to avoid spraying or using liquids of any kind directly on the amplifier surfaces.
- Fuse: The AC line fuse specifications vary by model:
- 100-120V model: 8 amp slow blow (or 250V 4 amp slow blow fuse)
- 200-240V model: 4 amp slow blow (or 250V 4 amp fuse)
- Replacement fuses must match the original type and rating to avoid voiding warranty or causing fire hazards.
- Servicing: In case of problems, users should contact their dealer or country's appointed distributor.
- Warranty: The amplifier comes with a 12-month warranty against material or construction faults from the date of purchase. The warranty is valid only if serviced by authorized Densen Audio Technologies agents and is voided by misuse, mishandling, accidents, tampering, or unauthorized modifications.
- User-Serviceable Parts: There are no user-serviceable parts inside the amplifier.
- Packaging: Users are advised to keep the original packing materials for safe future transportation.
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