The 5052 receives +/- 24V rails from an external 25-way 2U rack-mount power supply, and can be mounted within a 5088’s penthouse section. Please see the Accessories page for more information.
MIC / LINE
Selects between mic and line inputs.
TRIM
Continuously variable +/-6 dB level trim control.
TO EQ
Sends the mic preamp signal directly to the EQ when engaged.
MIC GAIN
A 12-way precision rotary switch controls gain from 0 to 66 dB in 6 dB steps.
SILK / TEXTURE
Pushing the Silk button cycles the Silk modes from Red to Blue to OFF. Silk reduces the negative feedback on the output transformer, adding harmonic content as the texture is increased. Red Silk accentuates the musical harmonic saturation from the mid and high frequencies, while Blue Silk accentuates harmonics from the low and low-mid frequencies. By manipulating the Texture control, the amount of Silk can be changed from essentially absent, to roughly 4-5% THD (mostly second order) depending on how hard the output transformer is being driven.
HIGH PASS FILTER
The high pass filter is continuously variable from 20-250Hz and engaged by the HPF switch, which illuminates when engaged. It is a valuable aid in any signal chain, but particularly so in a microphone preamplifier. Signals below the selected frequency are attenuated at a rate of 12db / octave, getting rid of proximity effect, building rumble, air handling, motor hum, etc.
HPF
12dB/octave High Pass Filter, variable from 20 - 250 Hz.
HIGH FREQ
+/- 15dB, Shelf or Peak, selectable at 8 kHz to 16 kHz.
MID FREQ
+/- 15dB with 6 center frequencies; 200 Hz, 350 Hz, 700 Hz, 1.5 kHz, 3 kHz and 6 kHz, with MID HI Q switch to narrow the bandwidth or increase the Q of the filter.
LOW FREQ
+/- 15dB, Shelf or Peak, selectable at 35 Hz, 60 Hz, 100 Hz or 220 Hz.
+48V
Engages phantom power on the microphone input
POLARITY
Push button inverts the polarity of the signal path, and illuminates when engaged. The symbol “Ø” is often used to denote opposite polarity.
LEVEL METER
An eight-segment LED bar-graph meter displays output level (pre-Silk). The color range proceeds from green for lower level signals, yellow for intermediate signals, and red for high levels. When the 5052 is clipped, the highest red LED will hold longer depending on how far above the clip threshold the signal was.
MIC PREAMP
NOISE
Un-weighted, 22 Hz - 22 kHz, source impedance 150 Ohm balanced.
Mic Pre Out @ unity gain: Better than -102 dBV
Main Out @ unity gain: Better than -103 dBV
With gain @ +66 dB: Better than -60 dBV
Equivalent Input Noise: Better than -126 dB
Gain Unity: up to +66 dB in 6 dB steps followed by a +/- 6 dB trim
LINE INPUT
Gain +/- 6 dB continuously adjustable
MIC PRE OUTPUT
Un-weighted, 22 Hz - 22 kHz, source impedance 40 Ohm balanced.
No load: Via line input with 40 Ohm source impedance
NOISE
Better than -102 dBV
FREQUENCY RESPONSE
+/- 0.1 dBu from 10 Hz to 31.5 kHz
-2.6 dB @ 120 kHz
MAXIMUM OUTPUT LEVEL
25 dBu
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: 0.25% Typical (2nd and 3rd harmonic)
MAIN OUTPUT
Measured via line input.
NOISE
Un-weighted, 22Hz - 22kHz, source impedance 40 Ohm balanced.
No load: Better than -102 dBV
FREQUENCY RESPONSE
+/- 0.1 dBu from 10 Hz to 40 kHz
-1 dB @ 174 kHz
MAXIMUM OUTPUT LEVEL
25 dBu
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: 0.08% Typical (2nd and 3rd harmonic)
TOTAL HARMONIC DISTORTION AND NOISE WITH SILK ENGAGED
RED
TEXTURE @ min.
@ 100 Hz, +20 dBu input level, no load 0.015%, mostly 3rd harmonic (typical)
TEXTURE @ max.
@ 100 Hz, +20 dBu input level, no load 1.5%, mostly 2rd harmonic (typical)
BLUE
TEXTURE @ min.
@ 100 Hz, +20 dBu input level, no load 0.0075%, mostly 3rd harmonic (typical)
TEXTURE @ max.
@ 100 Hz, +20 dBu input level, no load 1%, mostly 2rd harmonic (typical)
EQ INPUT
Un-weighted, 22 Hz - 22 kHz, source impedance 40 Ohm balanced.
No Load: Noise Better than -105 dBV
FREQUENCY RESPONSE
+/- 0.1 dBu from 10 Hz to 40 kHz
-1 dB @ 174 kHz
MAXIMUM OUTPUT LEVEL
26 dBu
TOTAL HARMONIC DISTORTION AND NOISE
@ 1 kHz, +20 dBu output level, hi Z: Better than 0.002%
@ 20 Hz, +20 dBu output level, hi Z: 0.006% Typical (2nd and 3rd harmonic)
HIGH PASS FILTER
Continuously variable swept frequency from 20 Hz to 250 Hz.
Slope: 12 dB/Octave
EQUALISER ENGAGED
NOISE
Un-weighted, 22 Hz-22 kHz, source impedance 40 Ohm balanced.
No load: Better than -95 dBV
MAXIMUM OUTPUT LEVEL
25 dBu
PHANTOM POWER
Supplied by internal switching converter, switch selectable on front faceplate
MAXIMUM INPUT
From 20 Hz to 20 kHz, +25 dBu
POWER REQUIREMENTS
@ +/-24VDC maximum current draw: 0.26A/0.20A
UNIT DIMENSIONS
1.75” W x 8.75” D x 9.4” H
(4.5 cm W x 22.2 cm D x 23.9 cm H)
UNIT WEIGHT
3.5 lbs. (1.6 kg)
SHIPPING DIMENSIONS
14” W x 14” D x 7” H
(35.6 cm W x 35.6 cm D x 17.8 cm H)
SHIPPING WEIGHT
6 lbs. (2.7 kg)
