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REDD.47
User Manual
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Chandler Limited REDD.47 User Manual

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®
Chandler Limited
REDD.47 Mic Amplier
User Manual
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For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
OFFICIAL EQUIPMENT
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Chandler Limited®
HISTORY
The EMI / Abbey Road Studios REDD.47 line
amplier was rst conceived in 1958 as a re­placement plug-in, all purpose line amplier cas-
sette for the Telefunken/Siemens V72s as used in early REDD mixing consoles.
REDD.47 Mic Amplier
User Manual
Thank you for purchasing the Chandler Limited
REDD.47 Mic Amplier, you now own a piece of EMI / Abbey Road Studios ocial equipment.
The Chandler Limited REDD.47 Mic Amplier is
a recreation of the highly sought after and rare EMI / Abbey Road Studios REDD.47 vacuum
tube based line amplier. The Chandler Limited REDD.47 Mic Amplier is a mono channel, and
incorporates an extended feature set over the
original equipment.
Your Chandler Limited REDD.47 Mic Amplier
has been carefully crafted and built by hand at
Chandler Limited in Shell Rock IA, U.S.A, using
through-hole components for the ultimate analog experience.
In 1958, EMI and Abbey Road Studios, through
their REDD (Record Engineering Development
Department) division, set out to design the next generation REDD mixing console, the REDD.51. The REDD.51 would be the last of the valve or
vacuum tube-based mixing consoles built by
EMI, and the only one to rely on the REDD.47 line amplier.
The rst REDD.51 console of only three built was manufactured in 1959. However, it wouldn’t be until 1964 before a REDD.51 console was installed at Abbey Road Studios’ Studio Two,
home to the Beatles.
The REDD.51 console and its REDD.47 line
ampliers left their unique and exceptional sonic
character on Beatles records recorded at Abbey
Road Studios’ Studio Two during 1964-1968; the majority of the Beatles’ catalog.
At Chandler Limited we are proud of our Ameri­can made products and we hope you like them!
Please feel free to call our shop anytime for help
or questions.
Phone: (319) 885-4200
For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
OFFICIAL EQUIPMENT
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POWER
The REDD.47 Mic Amplier features an internal power supply. Connection is made using the sup­plied IEC power cable. Power is preset internally to operate at either 120V or 220V.
CONNECTIVITY
On the rear panel of the REDD.47 Mic Amplier exists two XLR jacks, one for input, and the other for
output.
The XLR input is activated when the MIC/DI switch is set to ‘MIC’ or the up position.
Output signal will be available from the male XLR jack.
XLR jacks are wired pin 2 hot.
TUBES
The REDD.47 Mic Amplier relies on two vacuum tubes: EF86, E88CC.
For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
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MIC/DI
The MIC/DI switch allows the REDD.47 to function as a mic/line amplier, or a tube DI. For line level applications, reference the ‘PAD’
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TIP: Start a REVOLUTION! One the most iconic if not unique guitar sounds is that of the Beatles
song ‘Revolution.’ John Lennon’s guitar sound was created without the use of a guitar amplier, by plugging directly into the line amplier, overdriving one REDD.47 in another.
section.
In the ‘MIC’ position or up, signal is applied via the XLR input at the
rear of the unit.
To access DI functionality, set the MIC/DI switch to ‘DI’ or down,
and plug your guitar or bass guitar into the accompanying ¼” jack.
DI access sends your signal directly into the heart of the tube. Us­ing the REDD.47 in DI mode is similar to plugging directly into a VOX
AC15.
When using the DI, the output signal will be available from the male XLR jack on the rear of the unit.
Overdriving the REDD.47 can be achieved in the following ways:
1. Use two REDD.47 units in series, overdriving a second unit with gain from the rst unit.
a. ‘Revolution’ style – via DI, plug your guitar directly into the rst REDD.47, and
patch the XLR out from the rst unit into a second REDD.47.
2. Using a single REDD.47, plug your guitar or bass directly into a boost pedal (Chandler Limited Little Devil Colored Boost or other into), and from the boost pedal into the ¼”
DI jack.
3. Re-amp a source signal by applying a hot signal from your DAW to the XLR input of the REDD.47.
4. Apply a hot source via microphone to the REDD.47.
For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
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VOLTAGE GAIN
The ‘VOLTAGE GAIN’ control is a stepped input gain switch, preset
in 6db increments. The gain range available from this control is ex-
panded to 16-52db from the original REDD.47’s 34, 40, and 46db. Use this control to set the desired input gain. An additional +/-5db input gain is available via ‘FINE GAIN SET’.
FINE GAIN SET
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The ‘FINE GAIN SET’ control is a stepped switch allowing for ne­tuning of the input gain. The ‘FINE GAIN SET’ oers an expanded range of +/-5db available in 1db
+
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increments over the original REDD.47 line amplier.
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TIP: When gain staging, begin with ‘OUTPUT’ fully clockwise,
‘FINE GAIN SET’ at zero, and set the gain rst using the ‘VOLTAGE GAIN’ control. Once the approximate ‘VOLTAGE GAIN’ or input gain has been acquired, use the ‘FINE GAIN SET’ control to adjust for optimum level, and color.
NOTE: When ‘VOLTAGE GAIN’ and ‘FINE GAIN SET’ are set fully
clockwise at the highest settings, the total input gain is 57db.
RUMBLE FILTER
The ‘RUMBLE FILTER’ control is a low cut mechanism, fea­turing an expanded eight frequency settings (30, 45, 60, 70, 90, 110, 130, 180hz.) The ‘RUMBLE FILTER’ may be fully dis­engaged from the amplier by setting it to ‘OUT.’ This feature is useful for removing unwanted low frequency information
from the signal.
NOTE: The original ‘RUMBMLE FILTER’ was a lter
circuit available via jumper on the REDD.51 console.
This ‘RUMBLE FILTER’ was both unique in circuit design and function, rolling o bass at 30hz. The lter was applied after the line amplier, and before the
fader.
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OUTPUT
The ‘OUTPUT’ control is variable, and acts as a fader would on a console. Use this to control the overall output level of the pre-amplier to your recording device or DAW. ‘OUTPUT’ set fully clockwise is considered unity level.
For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
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PAD
A 20db pad exists to tame hot input sources. To engage the 20db pad, ip the ‘PAD’ switch to the down position. The ‘PAD’ is handy for taming hot signals, or using the REDD.47 for in line level sources. Use a pair of REDD.47 Mic Ampliers on your mix bus!
TIP: Sending line level source material into the REDD.47 is great way to
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further process your material, adding the rich harmonic texture available from this historic tube amplier.
To use the REDD.47 at line level, begin with ‘VOLTAGE GAIN’ at ‘16,’ ‘FINE GAIN SET’ at ‘0,’ and engage the 20db ‘PA’.’ Apply source signal via the XLR input, bring up ‘VOLTAGE GAIN’ if needed, and adjust the ‘FINE GAIN SET’ for the desired color.
POLE
The ‘POLE’ switch reverses the input signal by 180º when in the down position. This feature may be useful when a microphone is not ideally placed, a cable is wired incorrectly, or line level source material is out of
phase.
48 VOLT
Some microphones require phantom power. Phantom power is available via use of the ‘48 VOLT’ switch, and is engaged when the switch is set to the down position.
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WARNING: Only engage or disengage phantom power with the
microphone already connected to the pre-amplier. Disconnect­ing a microphone while phantom power is on may cause damage to equipment downstream. Never use phantom power with ribbon
microphones
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For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
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SERVICE
Prior to sending in your gear for repair, please contact our shop at the number listed below. We will assist you in troubleshooting the problem and, if needed, we will issue you an RMA# to send in the
gear.
Send repairs to:
Chandler Limited, Inc.
Attention: Repairs
222 S. Cherry St.
PO Box 38 (if sending via the postal service)
Shell Roc, IA 50670
Phone: (319) 885-4200
Email: support@chandlerlimited.com
CE Certication
Chandler Limited declares under its sole responsibility that all products manufactured by them are in
compliance with Electromagnetic Compatibility (EMC) Directive 2014/30/EU; Standards: EN55103­1:2009+A1:2012; EN55103-2:2009; EN55013:2013 and Low Voltage Directive (LVD) 2014/35/EU; Standards: EN60065:2002+A1:2006+A11:2008+A2:2010+A12:2011
For more information, visit www.chandlerlimited.com. © 2015 Chandler Limited, Inc. All Rights Reserved. RD47_UM_7615
Abbey Road Studios, EMI, REDD and their associated logos are trademarks of EMI (IP) Limited.
OFFICIAL EQUIPMENT
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