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1. MASTER Volume/Power

 - This rotary knob controls the level sent 

to the individual headphone output channels and powers the 

QH4 on and off. Turn the control clockwise to turn the system 

on. Turn the knob counterclockwise until it clicks to turn the 

system off.

2. MUTE Switch

 - This switch mutes all of the headphone outputs. 

3. MONO Switch 

- When pressed, the left and right inputs will be 

summed together into a single mono signal.

4. Headphone Volume

 (CH1–CH4) - Control knobs used to adjust 

the level of the headphone outputs. 

5. Power Indicator

 - This white LED will illuminate when power is 

on indicating the QH4 is ready for operation.

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1. Line INPUTS 

- Balanced 1/4” (TRS) left and right inputs. These line level 

inputs are the main signal inputs to the headphone amp. Plugging into 

only the L / MONO jack sends the signal to both the left and right.

2. DC Power Input

 - Connect the supplied power adapter here.

3. AUX IN

 - Stereo 1/8” inputs for connecting an auxiliary line level input, 

like that from a smart phone or computer output. 

4. AUX OUT

 - Stereo 1/8” outputs that are tied to the main 1/4” and AUX 

inputs for linking to another headphone amp, studio monitors or other 

device that accepts line level signals.

5. Headphone OUTPUTS (CH1–CH4)

 - Stereo 1/4” headphone 

outputs. Note: Do not connect headphones with a 

minimum impedance less than 16Ω.

SAMSON QH4

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