Rolls HA43 User Manual
INTRODUCTION
Thank you for your purchase of the HA43Pro Reference Headphone 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.
clean, loud headphone amplification.
... anywhere you need four channels of
- Broadcast
- School
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)
DESCRIPTION
INPUTS: 1/4” Stereo TRS jack, and Dual RCA jacks for connectionto 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 connection to headphones or earphones.
WARRANTY INFO
Please visit our website, www.rolls.com, for the Rolls 1 Year Warranty information and registration.
- Studio
HA43 Pro 4 Channel Headhone Amp
4-Ch. Studio Headphone Amp
HA43 Pro
HA43 Pro
4-Channel Studio Reference
SCHEMATIC
Headphone Amplifier
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!
Rolls Corporation
Salt Lake City, UT
9/06
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