Samson QH4 User manual

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.
1
1
2
2
3
3
4
4
5
5
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

iBasoo DC01

2.5mm balanced plug (TRRS)
6.35mm stereo plug (TRS)
Left Channel
6.35mm stereo plug (TRS)
Right channel
L
R
Ground
L-
L+
R+
R-
L
Left Tip
Ring
Sleeve
Tip
Ring
Ring
Sleeve
Tip
Ring
Ring
Sleeve
Tip
Ring
Sleeve
L R
Right
Ground
R-
R+
L+
L-
L+
R+
R-
L-
G
r
o
u
n
d
R
Left
Right
Ground
G
r
o
u
n
d
L R
(L+) to Left Tip
(L-) to Left Ring
(R-) to Right Ring
(R+) to Right Tip
2.5mm balanced plug (TRRS)
6.35mm stereo plug (TRS)
Left Channel
6.35mm stereo plug (TRS)
Right channel
L
R
Ground
L-
L+
R+
R-
L
Left Tip
Ring
Sleeve
Tip
Ring
Sleeve
L R
Right
Ground
R-
R+
L+
L-
L+
R+
R-
L-
G
r
o
u
n
d
R
Left
Right
Ground
G
r
o
u
n
d
L R
(L+) to Left Tip
(L-) to Left Ground
(L-) to Left Ring
(R-) to Right Ring
(R-) to Right Ground
(R+) to Right Tip
VERSION #1 - no ground VERSION #2 - with ground
2.5mm (TRRS) balanced to dual 6.35mm(TRS) stereo cable 2.5mm (TRRS) balanced to dual 6.35mm(TRS) stereo cable

iFi Zen DAC
Thank you for purchasing the DAC from ZEN series. The DAC is a
balanced USB-audio DAC amplier.
1. PowerMatch® (high/low)
PowerMatch® setting should be on low for IEMs and on high for
on/over headphones.
Warning: Due to the high power of ZEN DAC, before changing the PowerMatch
setting, always start o at a low volume level so that there is no risk of damage to
your headphones, speakers or your hearing. iFi audio is not responsible for any
hearing or equipment damage from misuse.
2. TrueBass® (high/low)
Many headphones lack the correct bass response. TrueBass® is
an analogue circuit designed to 'add back' the lost bass response
for the most accurate playback.
Tip: Open-back headphones and some IEMs usually sound better with TrueBass
set high. Adjust to suit.
3. Analogue Volume control
The analogue volume control in ZEN DAC is superior to any
digital volume control. It can be used to control the headphone
volume or the pre-amplier volume (when set to 'Variable'). If the
output at the rear is set to 'Fixed' the volume control is bypassed.
4. Audio Format LED (kHz)
The LED colour scheme indicates the audio format and sampling
frequency received by ZEN DAC from the music source.
LED Mode
Green PCM 44/48/88/96kHz
Yellow PCM 176/192/353/384kHz
Cyan DSD64/DSD128
Blue DSD256
Magenta MQA
5. Single-ended 6.3mm output
Connect single-ended 6.3mm headphones. With single-ended
3.5mm headphones, connect with a 3.5mm to 6.3mm adapter.
6. Balanced 4.4mm analogue output
Connect balanced 4.4mm headphones.
Tip: As ZEN DAC is balanced, we recommend the 4.4mm output.
7. Balanced 4.4mm analogue output
This is an analogue output via 4.4mm > XLR or other balanced
interconnects. You could use this for an active speaker or an
amplier.
Tip: As ZEN DAC is balanced, this is the recommended output.
8. Variable/Fixed switch
When the rear UnBAL/BAL analogue outputs are used, this switch
will determine whether or not ZEN DAC analogue volume control
is used.
9. RCA analogue output
This is an analogue output.
10. USB-audio and power input
This is a USB input. It connects ZEN DAC to the computer audio
source and provides the power supply.
11. DC 5V power
ZEN DAC is powered by 5 volts, either via the enclosed USB
cable (for connection to laptop or PC) or DC power supply (not
included).
Tip: For best performance upgrade the USB power supply to a super-low noise
power adapter such as iFi iPower or iPower X.
POWER MATCH
TRUEBASS
2 3 5 7 8 9 10 11 1 64

4.4mm Pentaconn plug (TRRRS)
6.35mm stereo plug (TRS)
Left Channel
6.35mm stereo plug (TRS)
Right channel
L
R
Ground
L-
L+
R-
Ground
R+
L
Left Tip
Ring
Sleeve
Ring
Tip
Ring
Ring
Sleeve
Tip
Ring
Sleeve
L R
Right
Ground
R+
R-
Ground
L+
L-
R-
R+
L-
L+
Ground
G
r
o
u
n
d
R
Left
Right
Ground
G
r
o
u
n
d
L R
(L+) to Left Tip
(L-) to Left Ring
(R-) to Right Ring
(R+) to Right Tip
VERSION #1 - no ground VERSION #2 - with ground
4.4mm (TRRRS) Pentaconn to dual 6.35mm(TRS) stereo cable
4.4mm Pentaconn plug (TRRRS)
6.35mm stereo plug (TRS)
Left Channel
6.35mm stereo plug (TRS)
Right channel
L
R
Ground
L-
L+
R-
Ground
R+
L
Left Tip
Ring
Sleeve
Ring
Tip
Ring
Ring
Sleeve
Tip
Ring
Sleeve
L R
Right
Ground
R+
R-
Ground
L+
L-
R-
R+
L-
L+
Ground
G
r
o
u
n
d
R
Left
Right
Ground
G
r
o
u
n
d
L R
(L+) to Left Tip
(L-) to Left Ring
(R-) to Right Ring
(R+) to Right Tip
4.4mm (TRRRS) Pentaconn to dual 6.35mm(TRS) stereo cable