Rolls HA43 Dépliant

... anywhere you need four channels of 

clean, loud headphone amplification.

Rolls Corporation 

Salt Lake City, UT

9/06

Thank you for your purchase of the HA43Pro Reference Head-

phone Amplifier. The HA43Pro drives up to four pairs of stereo 

headphones for high qualituy audio monitoring. The unit is intended 

for sound reinforcement, studio, choir, install, and other applications 

where a smaller size is desired without sacrificing audio quality.

SPECIFICATIONS

Input Impedance: 100k Ohms unbalanced

Max Input Level: +14 dBV

Input Connectors: TRS Stereo 1/4” phone, Dual RCA

Outputs: 4 TRS Stereo 1/4”, 4 TRS Stereo 1/8” (3.5mm)

Output Impedance: 51 Ohms each output

Max Gain: 20 dB/Channel

S/N Ratio: >90 dB

THD: < .008%

IMD (SMPTE): <.008%

Power: 12 VDC (Rolls Model PS27)

Weight: 1 lb (.45 kg)

Size: 4.15 x 3.45 x 1.16 (W x H x D)

INPUTS: 1/4” Stereo TRS jack, and Dual RCA jacks for connec-

tionto the stereo line-level signals to be monitored.

12 VDC PWR: Connects to the Rolls PS27 12 VDC (outside of the 

barrell positive) adapter. 

CHANNEL LEVELS: Sliders 1 - 4 adjusts the level of the indicated 

channel.

OUTPUTS 1 - 4: 1/4” and 1/8” (3.5mm) TRS stereo jacks for con-

nection to headphones or earphones.

Please visit our website, www.rolls.com,  for the Rolls 1 Year War-

ranty information and registration.

SCHEMATIC

The HA43 Pro is a full frequency response four 

channel headphone monitoring device designed 

for the recording studio, or other professional 

applications like listening rooms and monitoring 

stations. Each output boasts a whopping 20 dB of 

clean channel gain.

• Stereo 1/4” and Dual RCA Inputs

• Slider Volume controls

• AC adapter included

• Full frequency response

• Lots of output level.... it’s loud!