Pradinis stiprintuvas HPA4

Benchmark Media
3590 

THE ULTIMATE HEADPHONE AMPLIFIER


Benchmark Media Systems, Inc. and THX, Ltd. have partnered to introduce the Benchmark HPA4 headphone/line amplifier featuring THX Achromatic Audio Amplifier (AAA™) technology.

THX AAA™ reduces harmonic, intermodulation, and crossover distortion by 20 to 40 dB to guarantee a realistic and fatigue-free listening experience. It accomplishes this using a patented feed-forward topology to null conventional distortion and noise mechanisms, resulting in the world’s most linear amplifier. THX AAA allows the amplifier to reach its maximum output power and sound pressure level (SPL) without producing the distortion that normally accompanies increased output levels in traditional amplifiers.

Featuring the flagship THX-888 amplifier design, the revolutionary HPA4 headphone amplifier incorporates the same THX AAA technology that Benchmark uses in the AHB2 power amplifier. The HPA4 delivers sonic perfection. Hear the music without any contamination from electronic noise or distortion. The HPA4 delivers power, audio fidelity, speed and accuracy over an utterly silent background.

THE ULTIMATE LINE AMPLIFIER


The THX-888 amplifier is driven by a Benchmark line amplifier that features relay gain control, relay input selection, and relay muting. The line amplifier incorporates the finest gold-contact relays available. The gain control has 256 steps in 0.5 dB increments. It also features a balance control. Relay closures are precisely timed to deliver silky-smooth volume changes. No other relay gain control offers this level of precision and performance. The HPA4 includes 4 independent 256-step attenuators: two for the L&R headphone outputs, and two for the L&R line outputs. To make this all happen, the HPA4 includes a total of 64 precision relays.

100% ANALOG SIGNAL PATH


The HPA4 is 100% analog. It is designed to be driven from an external D/A converter or an external analog source. The HPA4 is designed to provide the ultimate analog signal path between inputs and outputs. The HPA4 eclipses the performance of typical high-end preamplifiers by achieving much lower noise and distortion.

THX-888™ Headphone outputs

THD
< -125 dB (0.00006%)

SNR
> 131 dB, unweighted, 20-20 kHz

Frequency Response
0.003 dB at 10 Hz, -0.001 dB at 20 kHz

Output Impedance
near 0 Ohms

Output Noise
< 2.45 uV at Unity Gain, 20-20 kHz

Maximum Output Power
6 Watts into 16 Ohms

Maximum Output Current
1.5A

Maximum Output Voltage
11.5 Vrms into 300 Ohms

Crosstalk
-133 dB @ 1 kHz, -115 dB @ 10 kHz (XLR4)

Balanced line outputs

THD
< -125 dB (0.00006%)

SNR
> 135 dB, unweighted, 20-20 kHz

Frequency Response
0.003 dB at 10 Hz, -0.001 dB at 20 kHz

Output Impedance
60 Ohms

Output Noise
< 1.9 uV at Unity Gain, 20-20 kHz

Maximum Input and Output Voltage
20 Vrms (+28 dBu)

Crosstalk
< -133 dB @ 1 kHz, -116 dB @ 10 kH

Dimensions

Including Feet
8.65" W x 3.88" H x 8.33" D

Excluding Feet
8.65" W x 3.47" H x 8.33" D

Weight

Weight
8lbs (3.6kg)

Power

Typical Input Power
18W

Maximum Input power
35W

Standby Power (when off)
0.33 W

Pradinis stiprintuvas HPA4

Benchmark Media
3590