Power Amplifier BFAudio BF-9140

Product Description:
The BF9140 2U 4 channel light weight professional amplifiers have been engineered for reliability where full power is required for extended times in fixed installations or portable applications. The BF9140 delivers extraordinary performance at unmatched value.
Key Features and Benefits:

    Housed in a rugged, all-steel 2U chassis
    2 x convenient front panel carry handles
    Rear panel selection switch for Input sensitivity, and Input Channel Linking
    Operates within 8Ω and 4Ω loads
    Soft start and overload protection circuitry
    Indented channel volume controls
    Amplifier Class I
    Front to back air flow for efficient cooling
    Variable fan speed is automatically adjusted by temperature
    4 x Electronically balanced XLR inputs
    4 x Speakon outputs
    Precision indented level controls, power switch,
    Power and Signal LED indicators for each channel
    Amplifier protection includes short circuit, excessive temperature, and DC on outputs

Specifications:
Rated Power (8Ω)	4 x 1400W
Rated Power (4Ω)	4 x 2400W
Input Sensitivity (32dB/X40)	1.73V
Input Sensitivity (40dB/X100)	0.69V
S/N Ratio (A Weight)	>110dB
Frequency Response (±0.5dB)	20Hz-20kHz
Damping Factor (63Hz)	>500
THD (1kHz)	<0.025%
Input Connector	4 x XLR
Input Impedance	20kΩ Balanced, 10kΩ Unbalanced
Output Connectors	4 x NL4
Cooling	Variable fan flow speed, airflow from front to back
Power Supply (8Ω)	100V-240V - 3.5A
Dimensions (W x D x H)	483mm (19”) x 400mm (17.8”) x 88mm (3.5”)
Packaging Dimensions (1 piece/pack)	550mm (21.7”) x 540mm (21.3”) x 175mm (6.9”)
Net Weight (1 piece/pack)	15.5kg (34.2lb)
Gross Weight (1 piece/pack)	17.5kg (38.6lb)

Class-I

Class-I, also known as BCA (Balanced Current Amplifier) is Crown’s patented, cutting-edge technology that gets more power out of an amplifier with less waste than was ever before possible. Class-I technology offers several key advantages. It provides unprecedented efficiency, requiring less power from the AC supply than other designs and that can add up to significant cost savings over the life of the amplifier. Class-I handles reactive loudspeaker loads easily and gracefully, by reusing energy returned from the loudspeaker rather than dissipating it as heat or forcing the amp into premature current limiting. This characteristic means class-I amplifiers run better and longer—especially at lower impedances. It also makes them more reliable, since they are not constantly stressed to their limits or subjected to excessive heat. Best of all, as proud owners can attest, amplifiers with class-I technology sound great, with a powerful, accurate sound that stands out from the competition