Rupert Neve Designs Shelford Channel

$3,999.00

The Shelford Channel is built around Rupert Neve’s first new transformer-gain, class-A microphone preamplifier in over 40 years, a “best-of-the-classics” inductor EQ section, a tone-packed diode bridge compressor, the power of variable Silk saturation, a new custom transformer output stage, and twice the operating voltage of vintage designs.

Over fifty years in the making, the Shelford Channel is the definitive evolution of the original technologies in Rupert’s classic console modules like the 1073, 1064 & 2254, thoughtfully advanced and refined for the 21st century studio.

The Shelford Channel is built around Rupert Neve’s first new transformer-gain, class-A microphone preamplifier in over 40 years, a “best-of-the-classics” inductor EQ section, a tone-packed diode bridge compressor, the power of variable Silk saturation, a new custom transformer output stage, and twice the operating voltage of vintage designs.

Over fifty years in the making, the Shelford Channel is the definitive evolution of the original technologies in Rupert’s classic console modules like the 1073, 1064 & 2254, thoughtfully advanced and refined for the 21st century studio.

Additional Information

The Shelford Channel is built around Rupert Neve’s first new transformer-gain, class-A microphone preamplifier in over 40 years, a “best-of-the-classics” inductor EQ section, a tone-packed diode bridge compressor, the power of variable Silk saturation, a new custom transformer output stage, and twice the operating voltage of vintage designs.

Over fifty years in the making, the Shelford Channel is the definitive evolution of the original technologies in Rupert’s classic console modules like the 1073, 1064 & 2254, thoughtfully advanced and refined for the 21st century studio.

The Input Stage and Transformer Gain Mic Pre

Like Rupert’s designs from his time in Little Shelford, the Shelford Channel’s preamplifier uses a directly-coupled transformer input with gain provided by the custom transformer itself – a first in over 40 years for Rupert Neve. This new custom-designed input transformer, along with its careful integration with the surrounding class-A circuitry, is critical to the Channel’s bold and instantly recognizable character.

Conveniently, the Direct Input uses the same topology as the best-selling RNDI Active Transformer Direct Interface, providing astonishing clarity for high-Z instrument signals, with unparalleled low-frequency response and an incredibly smooth high end.

FRONT PANEL FEATURES
THRU
Passive loop 1/4” output of the DI input signal.
DI
1/4” jack for direct injection (DI) or instrument inputs.
MIC/DI/LINE
Push-button switch that selects the Mic/DI input or line input.
GND LIFT
Push-button switch that separates the DI audio signal ground from chassis ground.
SIGNAL
LED that illuminates GREEN when signal is present and RED when near clip point.
MIC GAIN
12-position rotary switch that controls the microphone preamp gain in 6dB steps.
TRIM
31-detent potentiometer that allows the user to adjust the preamp gain within a range of +/- 6dB.
48V
Push-button switch that illuminates RED when +48V Phantom Power is engaged.
Ø (Polarity)
Push-button switch that illuminates AMBER when engaged and inverts the phase of the input signal.
HPF
Push-button switch that illuminates GREEN when the variable high pass filter is engaged.
FREQ
31-detent potentiometer that allows the user to adjust the cutoff frequency of the variable high pass filter within a range of 20Hz to 250Hz.
EQ IN
Push-button switch that illuminates GREEN when the inductor EQ section is engaged.
LF
31-detent potentiometer that controls the amount of boost or cut for the low frequency band within a range of +/- 15dB.
LOW FREQ
4-position rotary switch that selects the corner (shelf) or center (peak) frequency of the low frequency band.
LF PEAK
Push-button switch that toggles between shelf mode (out) or peak mode (in) of the low frequency band.
MID HI Q
Push-button switch that reduces the Q width of the mid frequency band when pressed in.
MID
31-detent potentiometer that controls the amount of boost or cut for the mid frequency band within a range of +/- 15dB.
MID FREQ
6-position rotary switch that selects the center (peak) frequency of the mid frequency band.
8K/16K
Push-button switch that selects between the two available high frequency shelf/peak frequencies: 8kHz (OUT) and 16kHz (IN).
HF
31-detent potentiometer that controls the amount of boost or cut for the high frequency band within a range of +/- 15dB.
COMP IN
Push-button switch that illuminates GREEN when the diode bridge compressor section is engaged.
THRESHOLD
31-detent potentiometer that controls the compressor threshold range from +20dBu to -25dBu.
RATIO
6-position rotary switch that adjusts the compressor ratio from 1.5:1 to 8:1.
S/C INSERT
Push-button switch that engages the side-chain insert SEND & RETURN jacks on the rear panel for external side-chain processing (ex: EQ).
HPF TO S/C
Push-button switch that illuminates GREEN when the compressor side-chain high pass filter is engaged.
GAIN
31-detent potentiometer that controls the compressor make-up gain within a range of -6dB to +20dB.
TIMING
6-position rotary switch that adjusts the compressor attack and release times. NOTE: Please refer to the Specifications section below for specific attack and release time settings.
LINK
Push-button switch that engages stereo compressor link mode.
PRE EQ
Push-button switch that routes the compressor section ahead of the EQ section when engaged.
BLEND %
31-detent potentiometer that controls the wet/dry mix of the compressed signal (wet) to the input signal (dry).
VU SELECT
Push-button switch that toggles between metering the compressor output level (OUTPUT) and gain reduction REDUCTION).
SILK IN
Illuminated push-button switch that toggles through the three available SILK modes: OFF, RED, and BLUE. RED enhances harmonic content in high mid and high frequencies. BLUE enhances harmonic content in low and low mid frequencies.
TEXTURE
31-detent potentiometer that controls the amount of SILK harmonics added within the transformer output stage when SILK is engaged.
PEAK
PEAK LED warns when signal levels are peaking 3dB below clip point.

REAR PANEL FEATURES
POWER
IEC AC power inlet with integrated power switch. 100-240VAC at 50/60Hz. 35 Watts maximum AC power con- sumption.
GROUND LIFT
Slide switch that lifts XLR Pin 1 from chassis ground on the MAIN OUT and the -6dB OUT to help isolate from ground interference.
LINE OUT
Balanced XLR output utilizing a custom Rupert Neve Designs transformer.
-6dB OUT
Balanced XLR output utilizing a lower level, secondary output on the custom Rupert Neve Designs transformer.
SIDE CHAIN SEND
Compressor side-chain insert SEND 1/4” TS jack for connecting to the input of an external processor (ex: EQ).
SIDE CHAIN RETURN
Compressor side-chain insert RETURN 1/4” TS jack for connecting to the output of an external processor (ex: EQ).
LINK
1/4” TS jacks that allow for two Shelford Channel compressors to be linked together for stereo compressor operation. ONLY INTENDED FOR USE WITH OTHER SHELFORD CHANNEL LINK JACKS.
LINE IN
Balanced XLR input that can be utilized for LINE level signals.
MIC IN
Balanced XLR input that can be utilized for MIC level signals.

Specifications

MIC PREAMP

• INPUT IMPEDANCE
2200 Ohm

• MAXIMUM INPUT LEVEL
+21.5 dBu from 150Hz to 22kHz
+8 dBu 20Hz to 22kHz

• NOISE
Un-weighted, 22Hz – 22kHz, source impedance 150 Ohm balanced.
Line Out (Unity Gain) -100.9 dBu
-6dB Out (Unity Gain -106.6 dBu
Line Out (+30dB Gain) -91.37 dBu
Line Out (+66dB Gain) -64.1 dBu
Equivalent Input Noise -121.37 dBu

• FREQUENCY RESPONSE
17Hz to 45kHz: +/-0.25 dB

DIRECT INPUT

• MAXIMUM INPUT LEVEL
+8 dBu from 20 Hz to 120 kHz

NOISE (LINE OUT)
-100 dBu (22Hz to 22kHz)

LINE INPUT

• MAXIMUM INPUT LEVEL
+30.5 dBu from 20Hz to 30kHz

• TOTAL HARMONIC DISTORTION AND NOISE
@ 1 kHz, +20 dBu output level, no load: Better than 0.002%
@ 20 Hz, +20 dBu output level, no load: 0.05% Typical (2nd and 3rd harmonic)

• NOISE (MAIN OUTPUT)
Un-weighted, 22Hz – 22kHz, source impedance 40 Ohm balanced, no load.
-101.1 dBu

• FREQUENCY RESPONSE
<10 Hz to 110 kHz: +/- 0.25 dB
120 kHz: +/- 0.32 Db

• MAXIMUM OUTPUT LEVEL
16Hz to 20kHz: +26 dBu

TOTAL HARMONIC DISTORTION AND NOISE WITH SILK ENGAGED

• SILK RED
MIN TEXTURE @ 100 Hz, +20 dBu input level, no load: 0.0131%, mostly 3rd harmonic (typical)
MAX TEXTURE @ 100 Hz, +20 dBu input level, no load: 1.66%, mostly 2rd harmonic (typical)

• SILK BLUE
MIN TEXTURE @ 100Hz, +20 dBu input level, no load: 0.0079%, mostly 3rd harmonic (typical)
MAX TEXTURE @ 100Hz, +20 dBu input level, no load: 0.941%, mostly 2rd harmonic (typical)

HIGH PASS FILTER
Continuously variable swept frequency from 20 Hz to 250 Hz.
Slope: 12 dB/Octave

EQ NOISE
Un-weighted, 22 Hz-22 kHz: -92 dBu

SIGNAL PRESENT
Illuminates GREEN when input stage signal level reaches -20 dBu

OVERLOAD INDICATOR
Illuminates RED when input stage signal level reaches -23 dBu

DIODE BRIDGE COMPRESSOR SECTION

• COMPRESSOR NOISE (BW 22 Hz – 22 kHz)
0dB Makeup Gain: -84.5 dBu
+20dB Makeup Gain: -64.2 dBu

• TIME CONSTANTS
Note: Time Constant (TC) measurements taken represent full range achievable between 1.5:1 and 8:1 ratio set- ting, 0 dBu I/P 1kHz burst tone used for all recorded measurements
Fast (TC1): Attack 180µS — 1.8mS // Release 100mS – 150mS
Medium Fast (TC2): Attack 750µS – 5.25mS // Release 160mS – 250mS
Medium (TC3): Attack 2.7mS – 18mS // Release 350mS – 525mS
Medium Slow (TC4): Attack 4.6mS – 38mS // Release 600mS – 1 S
Slow (TC5): Attack 11mS – 72.5mS // Release 800mS – 1.25 S
Auto (TC6): Attack 5.75mS – 35.5mS // Dual Release: T1 500mS, T2 1S
’FAST’ Mode: Speeds up all compressor time constants by 30%

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The Shelford Channel is built around Rupert Neve’s first new transformer-gain, class-A microphone preamplifier in over 40 years, a “best-of-the-classics” inductor EQ section, a tone-packed diode bridge compressor, the power of variable Silk saturation, a new custom transformer output stage, and twice the operating voltage of vintage designs.

Over fifty years in the making, the Shelford Channel is the definitive evolution of the original technologies in Rupert’s classic console modules like the 1073, 1064 & 2254, thoughtfully advanced and refined for the 21st century studio.

The Input Stage and Transformer Gain Mic Pre

Like Rupert’s designs from his time in Little Shelford, the Shelford Channel’s preamplifier uses a directly-coupled transformer input with gain provided by the custom transformer itself – a first in over 40 years for Rupert Neve. This new custom-designed input transformer, along with its careful integration with the surrounding class-A circuitry, is critical to the Channel’s bold and instantly recognizable character.

Conveniently, the Direct Input uses the same topology as the best-selling RNDI Active Transformer Direct Interface, providing astonishing clarity for high-Z instrument signals, with unparalleled low-frequency response and an incredibly smooth high end.

FRONT PANEL FEATURES
THRU
Passive loop 1/4” output of the DI input signal.
DI
1/4” jack for direct injection (DI) or instrument inputs.
MIC/DI/LINE
Push-button switch that selects the Mic/DI input or line input.
GND LIFT
Push-button switch that separates the DI audio signal ground from chassis ground.
SIGNAL
LED that illuminates GREEN when signal is present and RED when near clip point.
MIC GAIN
12-position rotary switch that controls the microphone preamp gain in 6dB steps.
TRIM
31-detent potentiometer that allows the user to adjust the preamp gain within a range of +/- 6dB.
48V
Push-button switch that illuminates RED when +48V Phantom Power is engaged.
Ø (Polarity)
Push-button switch that illuminates AMBER when engaged and inverts the phase of the input signal.
HPF
Push-button switch that illuminates GREEN when the variable high pass filter is engaged.
FREQ
31-detent potentiometer that allows the user to adjust the cutoff frequency of the variable high pass filter within a range of 20Hz to 250Hz.
EQ IN
Push-button switch that illuminates GREEN when the inductor EQ section is engaged.
LF
31-detent potentiometer that controls the amount of boost or cut for the low frequency band within a range of +/- 15dB.
LOW FREQ
4-position rotary switch that selects the corner (shelf) or center (peak) frequency of the low frequency band.
LF PEAK
Push-button switch that toggles between shelf mode (out) or peak mode (in) of the low frequency band.
MID HI Q
Push-button switch that reduces the Q width of the mid frequency band when pressed in.
MID
31-detent potentiometer that controls the amount of boost or cut for the mid frequency band within a range of +/- 15dB.
MID FREQ
6-position rotary switch that selects the center (peak) frequency of the mid frequency band.
8K/16K
Push-button switch that selects between the two available high frequency shelf/peak frequencies: 8kHz (OUT) and 16kHz (IN).
HF
31-detent potentiometer that controls the amount of boost or cut for the high frequency band within a range of +/- 15dB.
COMP IN
Push-button switch that illuminates GREEN when the diode bridge compressor section is engaged.
THRESHOLD
31-detent potentiometer that controls the compressor threshold range from +20dBu to -25dBu.
RATIO
6-position rotary switch that adjusts the compressor ratio from 1.5:1 to 8:1.
S/C INSERT
Push-button switch that engages the side-chain insert SEND & RETURN jacks on the rear panel for external side-chain processing (ex: EQ).
HPF TO S/C
Push-button switch that illuminates GREEN when the compressor side-chain high pass filter is engaged.
GAIN
31-detent potentiometer that controls the compressor make-up gain within a range of -6dB to +20dB.
TIMING
6-position rotary switch that adjusts the compressor attack and release times. NOTE: Please refer to the Specifications section below for specific attack and release time settings.
LINK
Push-button switch that engages stereo compressor link mode.
PRE EQ
Push-button switch that routes the compressor section ahead of the EQ section when engaged.
BLEND %
31-detent potentiometer that controls the wet/dry mix of the compressed signal (wet) to the input signal (dry).
VU SELECT
Push-button switch that toggles between metering the compressor output level (OUTPUT) and gain reduction REDUCTION).
SILK IN
Illuminated push-button switch that toggles through the three available SILK modes: OFF, RED, and BLUE. RED enhances harmonic content in high mid and high frequencies. BLUE enhances harmonic content in low and low mid frequencies.
TEXTURE
31-detent potentiometer that controls the amount of SILK harmonics added within the transformer output stage when SILK is engaged.
PEAK
PEAK LED warns when signal levels are peaking 3dB below clip point.

REAR PANEL FEATURES
POWER
IEC AC power inlet with integrated power switch. 100-240VAC at 50/60Hz. 35 Watts maximum AC power con- sumption.
GROUND LIFT
Slide switch that lifts XLR Pin 1 from chassis ground on the MAIN OUT and the -6dB OUT to help isolate from ground interference.
LINE OUT
Balanced XLR output utilizing a custom Rupert Neve Designs transformer.
-6dB OUT
Balanced XLR output utilizing a lower level, secondary output on the custom Rupert Neve Designs transformer.
SIDE CHAIN SEND
Compressor side-chain insert SEND 1/4” TS jack for connecting to the input of an external processor (ex: EQ).
SIDE CHAIN RETURN
Compressor side-chain insert RETURN 1/4” TS jack for connecting to the output of an external processor (ex: EQ).
LINK
1/4” TS jacks that allow for two Shelford Channel compressors to be linked together for stereo compressor operation. ONLY INTENDED FOR USE WITH OTHER SHELFORD CHANNEL LINK JACKS.
LINE IN
Balanced XLR input that can be utilized for LINE level signals.
MIC IN
Balanced XLR input that can be utilized for MIC level signals.

Specifications

MIC PREAMP

• INPUT IMPEDANCE
2200 Ohm

• MAXIMUM INPUT LEVEL
+21.5 dBu from 150Hz to 22kHz
+8 dBu 20Hz to 22kHz

• NOISE
Un-weighted, 22Hz – 22kHz, source impedance 150 Ohm balanced.
Line Out (Unity Gain) -100.9 dBu
-6dB Out (Unity Gain -106.6 dBu
Line Out (+30dB Gain) -91.37 dBu
Line Out (+66dB Gain) -64.1 dBu
Equivalent Input Noise -121.37 dBu

• FREQUENCY RESPONSE
17Hz to 45kHz: +/-0.25 dB

DIRECT INPUT

• MAXIMUM INPUT LEVEL
+8 dBu from 20 Hz to 120 kHz

NOISE (LINE OUT)
-100 dBu (22Hz to 22kHz)

LINE INPUT

• MAXIMUM INPUT LEVEL
+30.5 dBu from 20Hz to 30kHz

• TOTAL HARMONIC DISTORTION AND NOISE
@ 1 kHz, +20 dBu output level, no load: Better than 0.002%
@ 20 Hz, +20 dBu output level, no load: 0.05% Typical (2nd and 3rd harmonic)

• NOISE (MAIN OUTPUT)
Un-weighted, 22Hz – 22kHz, source impedance 40 Ohm balanced, no load.
-101.1 dBu

• FREQUENCY RESPONSE
<10 Hz to 110 kHz: +/- 0.25 dB
120 kHz: +/- 0.32 Db

• MAXIMUM OUTPUT LEVEL
16Hz to 20kHz: +26 dBu

TOTAL HARMONIC DISTORTION AND NOISE WITH SILK ENGAGED

• SILK RED
MIN TEXTURE @ 100 Hz, +20 dBu input level, no load: 0.0131%, mostly 3rd harmonic (typical)
MAX TEXTURE @ 100 Hz, +20 dBu input level, no load: 1.66%, mostly 2rd harmonic (typical)

• SILK BLUE
MIN TEXTURE @ 100Hz, +20 dBu input level, no load: 0.0079%, mostly 3rd harmonic (typical)
MAX TEXTURE @ 100Hz, +20 dBu input level, no load: 0.941%, mostly 2rd harmonic (typical)

HIGH PASS FILTER
Continuously variable swept frequency from 20 Hz to 250 Hz.
Slope: 12 dB/Octave

EQ NOISE
Un-weighted, 22 Hz-22 kHz: -92 dBu

SIGNAL PRESENT
Illuminates GREEN when input stage signal level reaches -20 dBu

OVERLOAD INDICATOR
Illuminates RED when input stage signal level reaches -23 dBu

DIODE BRIDGE COMPRESSOR SECTION

• COMPRESSOR NOISE (BW 22 Hz – 22 kHz)
0dB Makeup Gain: -84.5 dBu
+20dB Makeup Gain: -64.2 dBu

• TIME CONSTANTS
Note: Time Constant (TC) measurements taken represent full range achievable between 1.5:1 and 8:1 ratio set- ting, 0 dBu I/P 1kHz burst tone used for all recorded measurements
Fast (TC1): Attack 180µS — 1.8mS // Release 100mS – 150mS
Medium Fast (TC2): Attack 750µS – 5.25mS // Release 160mS – 250mS
Medium (TC3): Attack 2.7mS – 18mS // Release 350mS – 525mS
Medium Slow (TC4): Attack 4.6mS – 38mS // Release 600mS – 1 S
Slow (TC5): Attack 11mS – 72.5mS // Release 800mS – 1.25 S
Auto (TC6): Attack 5.75mS – 35.5mS // Dual Release: T1 500mS, T2 1S
’FAST’ Mode: Speeds up all compressor time constants by 30%

Reviews

There are no reviews yet.

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