קדם מגבר Brama Preamplifier מבית VINNE ROSSI

Additional Features

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Controls

• Volume control: 100-step, resistor ladder topology

• Input select: 1 through 5

• Gain: -12dB, -6dB, 0dB, +6dB, +12dB

• Triode mode: 0%, 25%, 50%, 75%, 100%

• Balance: 12-steps L/R from center

• Phase: Normal/Inverted outputs

• Memory Inputs: Yes (each input saves the setting for Triode,

Gain, Balance, and Phase)

• Home Theater Bypass mode: Yes

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Front Panel

• Left gauge: Input, Balance, Triode (%), and Gain (dB), with

indicator LEDs to show the parameter being adjusted

• Right gauge: Volume mode (0-100) and VU mode, with indicator

LEDs to show mode selected

• Gauge backlight: Off, Low, Medium, High

• Gauge Glass: Sapphire crystal

• Left knob: 24-position, Swiss rotary encoder with magnetic

sensing and built-in push-button switch for powering On/Off (3-second

push-and-hold)

• Right knob: 48-position, Swiss rotary encoder with magnetic

sensing and built-in push-button switch for MUTE (quick press) and

Volume/VU mode select (3-second push-and-hold)

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Rear Panel

• Line-level inputs: 5 sets of XLR inputs

(1 set of RCA-to-XLR adapters are included)

• Line-level outputs: 3 sets of XLR outputs (volume controlled)

• Trigger outputs: 2

• AC input jack: IEC 320-C14 with built-in fuse holder

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Remote

• 2.4” high-resolution LCD display with sapphire glass

• Connectivity to Brama: Bluetooth

• Adjustable backlight

• 3.7V Li-ion rechargeable battery (user replaceable)

• USB-C jack (for battery charging and firmware updates)

• Built-in accelerometer (for automatic wake up from sleep mode)

• Machined from a solid block of aluminum

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Power Supply

• Transformer: Custom-designed, 1750VA toroid with dual-mono

secondary windings. Encapsulated in epoxy resin and shielded.

• Belleson SPX-VR super-regulated power supplies for L/R

linestage section and 300B cathode heating.

• Separate, isolated power module for control and gauge circuitry.

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Protections

• AC mains voltage (under and overvoltage protection)

• 300B under and overcurrent protection

• Preamplifier outputs (overcurrent protection)

• Automatic reporting to Brama Remote (diagnostics)