Stereo stiprintuvas AHB2

Benchmark Media
3590 

TRUE HIGH-RESOLUTION PERFORMANCE


The AHB2 is the ideal match to the performance limits of High-Resolution-Audio (HRA) formats. Benchmark’s AHB2 power amplifier delivers musical details without introducing the masking effects of amplifier noise and distortion. The dynamic range of the AHB2 is 132 dB, making it 10 to 30 dB quieter than some of the very best reference-quality power amplifiers.

The frequency response of the AHB2 extends beyond 200 kHz. With the AHB2, you will discover previously overlooked nuances, dynamics, and detail in your favorite recordings and experience the full potential of the latest high-resolution 24-bit PCM and 1-bit DSD audio formats.

FULFILLING THE NEED FOR BETTER AMPLIFICATION


Many loudspeakers have frequencies at which their impedance drops to levels that are much lower than the “nominal” impedance. The AHB2 drives difficult phase angles and low impedances with ease. Stereo loads as low as 1.4 Ohms can be cleanly driven to full output levels. Most power amplifiers produce higher levels of distortion when the load impedance decreases. In contrast, the feed-forward error correction system in the AHB2 keeps the output clean when driving difficult loads. The AHB2 produces almost no measurable distortion at any rated load condition.

In our quest to build the ultimate amplifier, we also focused on frequency response, output noise, drive current, damping factor, and reliability. The result is an amplifier that stands head and shoulders above the competition.

Techninė specifikacija

Continuous average output power
100 Watts per channel into 8 Ohms, both channels driven; 130 Watts per channel into 6 Ohms, both channels driven; 190 Watts per channel into 4 Ohms, both channels driven; 240 Watts per channel into 3 Ohms, both channels driven; 200 Watts into 16 Ohms, bridged mono; 380 Watts into 8 Ohms, bridged mono; 480 Watts into 6 Ohms, bridged mono

Output voltage under full load
29.03 dBV, 31.25 dBu, 28.28 Vrms into 8 Ohms, both channels driven; 28.92 dBV, 31.14 dBu, 27.93 Vrms into 6 Ohms, both channels driven; 28.81 dBV, 31.03 dBu, 27.57 Vrms into 4 Ohms, both channels driven; 28.57 dBV, 30.79 dBu, 26.83 Vrms into 3 Ohms, both channels driven; 27.14 dBV, 29.36 dBu, 22.76 Vrms into 2 Ohms, both channels driven; 35.05 dBV, 37.27 dBu, 56.57 Vrms into 16 Ohms, bridged mono; 34.83 dBV, 37.05 dBu, 55.14 Vrms into 8 Ohms, bridged mono; 34.59 dBV, 36.81 dBu, 53.67 Vrms into 6 Ohms, bridged mono; 33.16 dBV, 35.38 dBu, 45.52 Vrms into 4 Ohms, bridged mono

SNR & Dynamic range
132 dB A-weighted, Stereo Mode; 135 dB A-weighted, Mono Mode; 130 dB Unweighted, 20 Hz to 20 kHz, Stereo Mode; 133 dB Unweighted, 20 Hz to 20 kHz, Mono Mode

Noise voltage
-103 dBV, -101 dBu, 7.1 uVrms, Stereo Mode; -100 dBV, -98 dBu, 9.8 uVrms, Mono Mode

Noise relative to 2.83 VRMS
-112 dB, Stereo Mode; -109 dB, Mono Mode

THD+N
1 kHz, 80 kHz LPF, at full rated output into any rated load; < -118 dB (< 0.00013%), Stereo Mode; < -118 dB (< 0.00013%), Mono Mode

THD
1 kHz, 20 kHz LPF, at full rated output into any rated load; < -119 dB (< 0.00011%), Stereo Mode; < -120 dB (< 0.00010%), Mono Mode

Crosstalk
Better than -115 dB at 1 kHz; Better than -92 dB at 20 kHz

Frequency response
Better than 0.1 Hz to 200 kHz, +0/-3 dB; -0.01 dB at 20 Hz, -0.17 dB at 20 kHz, 8-Ohm Load; -0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4-Ohm Load

Damping factor
350 at 20 Hz, 8-Ohms; 254 at 1 kHz, 8-Ohms; 34 at 20 kHz, 8-Ohms; 7 at 200 kHz, 8-Ohms

Maximum audio output current
29 A peak, per channel, both channels driven

Input sensitivity
Low-Gain = 22 dBu (9.8 Vrms), Gain = 9.2 dB; Mid-Gain = 14.2 dBu (4 Vrms), Gain = 17.0 dB; High-Gain = 8.2 dBu (2 Vrms), Gain = 23 dB; Use Mid-Gain or High-Gain settings for unbalanced inputs Unbalanced inputs require RCA to XLRM adapter cables

Input impedance
50 k Ohms, normal mode; 1 M Ohm, common mode

Input CMRR
80 dB at 20 Hz, typical; 80 dB at 1 kHz, typical; 65 dB at 20 kHz, typical

Trigger I/O
12 VDC 200 mA current-limited output to trigger turn-on of remote devices; DC input for slaving to remote devices; Input responds to 3.3 V logic and higher, VIL = 1.26 V, VIH = 2.7 V; Absolute maximum input voltage = 30 VDC; Absolute minimum input voltage = -0.3 VDC; Input Impedance = 20 k Ohms

Dimensions @ Non rack mount version
11.04" W x 3.88" H x 9.34 " D - Including feet and binding posts; 11.04" W x 3.47" H x 8.33 " D - Excluding feet and connectors; Faceplate height is 2RU

Dimensions @ Rack mount version
9.00" W x 3.88" H x 10.62 " D - Including binding posts, handles and removable feet; 19.00" W x 3.47" H x 8.33 " D - Excluding feet and connectors; 9.09" rack depth, including binding posts, excluding cables; 11" rack depth, including cables; Faceplate height is 2RU

Weight
12.5 lbs., 16 lbs. shipping - Non-rack-mount version; 13.5 lbs., 17 lbs. shipping - Rack-mount version

AC Input
Auto-ranging AC Input; 100 to 120 VAC +/- 10%, 8 Amps, 50 - 60 Hz; 220 to 240 VAC +/- 10%, 8 Amps, 50 - 60 Hz; Idle Power Consumption = 20 W; Standby Power Consumption < 0.5 W

Stereo stiprintuvas AHB2

Benchmark Media
3590