MasterSounds Radius TWO VALVE User manual

Radius TWO VALVE
Operation Manual

Index
1: Safety instructions pg3
2: Overview pg4
3: Front panel controls pg5
4: Rear panel controls pg8
5: Warranty pg10
6: Technical specification pg11
Radius TWO VALVE
Operation Manual Index 2

1: Important safety instructions - Read rst
READ THE INSTRUCTIONS - Read and retain these instructions for future
reference. Adhere to all warnings printed here and on the console and
its power unit.
COVERS - Do not remove the power unit cover. Operate the console
with its cover correctly fitted. Refer servicing work to authorised
personnel only.
MAINS POWER - Connect the console power unit to a mains power supply
only of the type described in this user guide and marked on the unit.
The power source must provide a good ground connection. Do not remove
or tamper with the ground connection in the power cord. Use the power
cord with a sealed mains plug appropriate for your local mains supply
as provided with the console. Route the power cord so that it is not
likely to be walked on, stretched or pinched by items placed upon or
against it.
INSTALLATION - Install the console and its power unit in accordance
with the instructions printed in this user guide. Do not connect
the output of power amplifiers directly to the console. Use audio
connectors and plugs only for their intended purpose.
VENTILATION - Ensure adequate ventilation around the console and its
power unit. Do not obstruct the ventilation slots or position the unit
where the air flow required for ventilation is impeded.
MOISTURE - To reduce the risk of fire or electric shock do not expose
the equipment to rain or moisture or use it in damp or wet conditions.
Do not place containers of liquids on it, which might spill into any
openings.
ENVIRONMENT - Locate the units away from direct sunlight and any
equipment which produces heat, such as power supplies, amplifiers and
heaters. Protect from excessive dirt, dust, heat and vibration when
operating and storing. Avoid tobacco ash, drinks spillage and smoke,
especially that associated with smoke machines. Do not mount the power
supply on any surface subject to resonance or vibration.
HANDLING - To prevent damage to the controls and cosmetics avoid
placing heavy objects on the console surfaces, scratching the surface
with sharp objects, or rough handling and vibration. Protect the
controls from damage during transit. Use adequate packing if you need
to ship the unit.
Radius TWO VALVE
Operation Manual Safety Instructions 3

2: Overview
Building on the success of its flagship Radius 4V DJ mixer, boutique
mixer brand, MasterSounds, has added the compact Radius TWO VALVE to
its range. The new 2 channel DJ mixer is manufactured using the highest
quality components, and comprises a similar feature set as its award-
winning 4 channel sibling, in a smaller footprint.
At the heart of Radius TWO VALVE and its unique sound quality are two dual
triode valves, which form part of the input buffer stage to the VCAs.
“The valves’ high input impedance minimises loading on the preceding
stages but provides low output impedance to drive the VCAs, whilst natural
compression smooths and warms harsh transients. Careful circuit design
around the valves minimises noise and distortion,” explains leading DJ
mixer designer, Andy Rigby-Jones, from MasterSounds’ technology partner,
Union Audio.
Radius TWO VALVE comprises 2 fully-featured channel strips with Aux
send (switchable pre or post fader), input level trim, illuminated input
select switch, a super smooth 3-band asymmetric EQ, large illuminated
Cue switch and high quality ALPS rotary faders.
To the right of the channel strip features a 3-band Master EQ/Isolator,
Master and Booth level controls, and headphone monitor with split and
Cue/add mix control. Below the master section is a high-quality Penny &
Giles crossfader, with contour control to adjust the curve from smooth
mix to fast cut.
Two 36mm illuminated analogue VU meters provide accurate signal level
monitoring of the Mix Buss, and automatically switch to monitoring
the Cue level when a channel Cue is activated. If the signal level is
excessive, the VU meter illumination will change from warm white to
bright red.
A new split composite/passive RIAA stage featuring Vishay 2% Polypropylene
capacitors, close tolerance thin film resistors and JFET pre-amplifiers
provides outstanding fidelity from the turntable inputs. All circuit
coupling is through bypassed Panasonic electrolytics to preserve this
fidelity throughout the entire signal chain. The icing on the cake is a
pair of MUSES operational amplifiers providing world class summing for
the fully balanced main Mix Buss.
Finally, MasterSounds mixers are hand built at Union Audio in Cornwall,
UK, ensuring the finest build quality.
“Radius TWO VALVE has been designed for clubs and DJs requiring a
conventional DJ toolkit with ‘no compromise’ audio fidelity. It is the
ideal companion for DJ purists who only require 2 audio channels in a
premium package. The open, dynamic and transparent sound stage, portable
size for carrying between venues, and intuitive feature set gives users
an optimal DJ experience, be it at home or in the club,” concludes
MasterSounds founder, Ryan Shaw.
Radius TWO VALVE
Operation Manual Overview 4

3: Front panel controls
Radius TWO VALVE
Operation Manual Front panel controls
AUX – The AUX send level pot adjusts the amount of channel signal
level sent to the Aux Mix Buss (and on to an external FX unit). Fully
clockwise the signal level is boosted by +10dBu, allowing for precise
adjustment of FX signals.
PRE – The PRE button switches the Aux send feed from Post Fader to Pre
Fader (i.e. set to Pre Fader it will still send to the Aux Mix Buss with
the rotary fader down).
TRIM – The TRIM pot adjusts the input signal level from OFF up to a
maximum of +10dBu, enabling accurate level matching between different
musical sources.
LINE/RIAA – This button selects either the RIAA (Phono) level input in
its top position, or the LINE input in the bottom position as indicated
with screen printed text.
5

3 BAND EQ – Radius TWO VALVE features a traditional HIGH MID LOW
equalisation system. Each pot gives -20dB of cut and +6dB of boost per
band.
CUE – Each CUE button routes the channel signal to the headphones.
Pressing the CUE button illuminates the red LED. When CUE buttons are
activated you can hear the selected CUE channels playing. When no CUE
button is active the headphone signal is automatically routed to the
Master Mix Buss.
VALVE SLOT – There are 2 valve slots on the front panel, with an
attractive perforated mesh below each slot arrangement. Below each shot
shows the valve, with a red LED glow around it.
XFADE SWITCH – Below each CUE button is a XFADE toggle switch. This
switch assigns the cross fader to the desired channel. If the XFADE
toggle switch is set to X the channel mix level is controlled by the
cross fader and will be at maximum if the cross fader is set to X. When
the OFF toggle is selected the cross fader is bypassed, and when the
toggle switch is set to Y no sound will be heard in the mix if the cross
fader is set to X.
LED METER – Each of the 2 channels features a 10 bar LED meter. This
visually shows the amount of input signal being processed through each
channel, ranging from -25dB to PK (PEAK SIGNAL). Normal operating
range should be -6dB to +6dB with an average of 0dB. This gives enough
headroom for unexpected peaks in the musical signal. It is important to
be aware that if the signal reaches PK the channel should be turned down
as distortion could occur.
ROTARY FADER – Each channel has a large ROTARY FADER for precision
control of its level when mixing. The rotary ranges from fully off when
anti-clockwise to unity gain (0dB) when clockwise. For best performance
operate these controls near to their fully clockwise position for normal
music level.
VU METERS – Radius TWO VALVE features two high quality analogue VU
(Volume Unit) meters, which accurately measure the left and right audio
signals. The meters show the post EQ sound level. An added feature of
the VU Meters is that when driven over +6VU the meter will illuminate
RED to warn against clipping. In SPLIT MODE the LEFT VU Meter indicates
the cue signal level, and the RIGHT VU Meter indicates the MIX level,
(see SPLIT on pg 7 opposite).
Radius TWO VALVE
Operation Manual Front panel controls 6

MASTER EQ/ISOLATOR – The MASTER EQ/ISOLATOR functions as a normal
isolator using 12dB/octave filters, with crossover frequencies at 350Hz
and 3.5kHz making for a very musical isolator. We have positioned the
layout of the pots so it easily works as a Master EQ.
MASTER – The MASTER rotary pot adjusts the signal level sent to the Main
Output XLRs (House Mix) ranging from OFF to +10dBu of gain. Set the
control to approximately 1 o’clock for unity.
BOOTH – The BOOTH rotary pot adjusts the signal level sent to the Booth
Output TRS Jacks (Monitor Mix) ranging from OFF to +10dBu of gain. Set
the control to approximately 1 o’clock for unity.
SPLIT – The SPLIT CUE button illuminates RED when activated and links
to the CUE buttons and VU Meters. When the SPLIT CUE is active and a
channel CUE is pressed, the Mix Buss Level will be shown on the Right
Meter, and the channel Pre-Fade signal (CUE) will be shown on the Left
Meter, enabling you to balance the two levels for smoother mixing. The
Split button also sends the cued source to the Left headphone and the
mix source to the Right headphone, which is very useful if mixing in a
quiet environment. SPLIT CUE is automatically disabled when the Channel
CUEs are off, and the Meters and Headphones revert to monitoring the
Stereo Master Mix Signal.
PHONES – Use the headphone pot to control the sound level sent to
your headphones. Please take care when monitoring with headphones as
excessive sound volumes can cause premature deafness. The ¼” jack
headphone input is located on the front of the mixer as shown on the
headphone graphic.
X FADE CONTOUR – This pot enables precise control of the cross fader
slope giving lots of scope for a variety of mixing styles. When the pot
is turned full anti clockwise, the cross fader slope is very mild, great
for blending tracks. Rotate the pot clockwise and you will hear the
cross fader slope sharpen up. Fully rotate the pot clockwise for ultra
sharp cuts when scratching.
ADD MIX – The add mix knob controls the amount of stereo house mix sent
to your cued track in the headphones. When the knob is rotated fully
anti clockwise only the cued track will be heard. Turning the knob
clockwise increases the amount of house mix that can be heard in the
headphones.
CROSS FADER – Radius TWO VALVE uses a high quality Penny & Giles cross
fader. The cross fader enables you to mix between signals assigned to X
or Y as indicated in the screen-printed text. The addition of a cross
fader enables a variety of DJ styles to be performed with ease, from a
basic fade, to smooth beat matching and complex scratch manoeuvres. Use
the cross fader with the XFADE SWITCH (see opposite on pg 6) to select
which channels to assign to the X or Y position.
Radius TWO VALVE
Operation Manual Front panel controls 7

Radius TWO VALVE
Operation Manual Rear panel controls 8
4: Rear panel controls
MASTER OUT - Output level is +14dBu when the MASTER level control is
fully clockwise and the VU meters read -4VU. The XLR output is designed
to operate with balanced equipment such as powered monitor speakers and
amplifiers.
AUX SEND & RETURN/INSERT – The AUX SEND & AUX RETURN system has ¼”
TRS (balanced) jack sockets for connection to an external FX unit. The
SEND is connected to the FX units’ input, and the FX units’ output is
connected to the RETURN (see USING THE EXTERNAL SEND & RETURN SYSTEM).
INSERT ON BUTTON - Reconfigures the Aux Return Jacks as a Mix Buss
Insert, giving the user unparalleled flexibility for FX integration at
the press of a button (see USING THE EXTERNAL SEND & RETURN SYSTEM).
GROUND POST - Unscrew the knurled nut, attach the turntable(s) ground
lead(s), and screw back into place without over-tightening the nut.
RECORD OUT – Twin RCA sockets enable the user to make a stereo recording
of a performance. The overall volume of the Master Output does not
affect the Record Out function—this outputs at -6dBu.
BOOTH OUT - The ¼” TRS (balanced) Jack Booth Output feeds the DJ’s booth
(local Monitor) amplifier/loudspeaker system.
POWER SWITCH – “O” = OFF. Press the “–“ to power the mixer ON with the
external power supply connected.
POWER INPUT SOCKET – Connect the external 18V power supply to the input
socket as labelled on the rear panel.
CH ONE & CH TWO – Both LINE and PHONO inputs feature twin (Left & Right)
RCA Phono Sockets. The PHONO input provides gain and RIAA equalisation
for turntable cartridges on CH ONE & CH TWO. The LINE inputs on CH ONE
& CH TWO provide input for CD players.

Using the external Send & Return System
Connect the Mixer Aux Send outputs to the FX unit inputs and connect
the FX unit’s outputs to the mixer Aux Returns. Set the FX unit to
unity gain.
Turning up the mixer channel send control feeds the channel signal to
the FX unit. This signal is processed by the FX unit and its output is
fed back into the mix, adding an echo, delay, reverb, or other effect
to the track that’s playing. Turning down the mixer channel send
stops the channel signal feeding to the FX unit and so also stops the
effect. Turning up the mixer channel send increases the level of FX.
Normally the feed to the channel AUX send is also controlled by the
channel fader, so turning down the fader also turns down the level of
FX. However if the AUX send PRE button is pressed, the AUX send takes
its signal before the Channel Fader so the channel signal can be sent
to the FX Unit even if the fader is off. This can be a cool way to
mix into a new track: introducing a low level delay of the track you
are about to mix into, before mixing in the new track by bringing up
the channel fader.
MIX INSERT – Radius TWO VALVE incorporates a unique feature that
allows the Aux Return Jack Sockets to be reconfigured as a Mix Buss
Insert point, just by pressing the INSERT ON button. This allows you
to run the entire mix though an external FX processor or other device,
such as a compressor, limiter or graphic equaliser. With the button
pressed the two ¼” TRS Jacks become a conventional mixer Insert, with
the Tip being the SEND, and the Ring being the RETURN.
Radius TWO VALVE
Operation Manual Rear panel controls 9

www.mastersounds.co.uk
Radius TWO VALVE Operation Manual
Copyright © 2019 MasterSounds Audio. All rights reserved 10
5: Warranty
MasterSounds warrants that the mixer shall be free of defects in
workmanship and materials for a period of 24 months from the date of
purchase. In the event that the product fails to operate as intended,
MasterSounds will repair or replace the product subject to the following
conditions.
That the failure was not due to improper installation, operation,
cleaning or maintenance, accident, damage, misuse, abuse, or non-
approved modifications to the mixer.
The warranty does not cover normal wear and tear or any other event,
act, default or omission outside MasterSounds control.
Faulty products must be returned to MasterSounds or an authorised
service agent along with the original invoice or proof of purchase,
and the mixer must be returned packed in the original shipping box.
Please contact MasterSounds before shipping a faulty unit.
The warranty applies only to the original purchaser and is not
transferrable.
At their sole discretion, MasterSounds may either repair the defective
product or replace with an equivalent service exchange item.
This warranty constitutes the purchaser’s sole remedy. MasterSounds
shall not be liable for any other repair or replacement cost or any
damage or loss directly or indirectly related to the malfunction of
this mixer.
1.
2.
3.
4.
5.
6.
Radius TWO VALVE complies with the European
Electromagnetic Compatibility directives
2014/30/EU and the European Low Voltage
directives 2014/35/EU.

6: Technical specication
Dimensions
Weight
Packed Dimensions
Packed weight
Power Requirement
External Power Supply
DC Internal Power Rails
Audio Performance
Residual Output Noise
Mix noise Unity Line IN to Mix Out
Distortion THD+N
Dynamic Range
Maximum Signal Level
Frequency Response
Headphone Output Power
EQ/Filters
Channel EQ
Channel EQ Frequency
Master EQ/Isolator Cut/Boost
Master EQ/Isolator Crossover Fc
RIAA Accuracy
Radius TWO VALVE
Operation Manual Technical specification 11
MasterSounds reserves the right to change the specification without notice.
230W x 282D x 84H
3.3KG
351W x 351D x 180H
5.5KG
Universal 90V – 265V AC 50/60Hz
18V 18W Max
+/- 18V DC
<-97dBu 20Hz to 20kHz un-weighted
<-90bBu 20Hz to 20kHz un-weighted
<0.008% Line IN to Mix OUT 0dBu
>116dB
±27dBu
10Hz – 50kHz +0/-1dB
10Hz – 80kHz +0/-3dB
800mW RMS into 32 Ohms
3 Band -20/+6dB
100Hz, 1kHz, 5kHz
OFF to +12dB
350Hz and 3.5kHz
Within 0.25dB 40Hz – 20kHz.

Radius TWO VALVE Operation Manual
Copyright © 2019 MasterSounds Audio. All rights reserved
www.mastersounds.co.uk