Rupert Neve Designs Portico 517: 500 Series Mic Pre / DI / Comp

The first 500 series preamp-compressor from the bench of the Godfather of audio, Mr. Rupert Neve.


Based on the Portico 5017 Mobile Pre, the Rupert
Neve Designs 517 provides world-class, transformer-coupled preamp,
compressor, and DI circuitry, with Vari-phase, Silk and DI/mic blending
capabilities in a 500 series model. As the first 500 series module
designed by Mr. Rupert Neve, the 517 incorporates outstanding sonic
quality with an indispensable feature set.

Mic Pre and Instrument Amplifier
The
517′s mic pre includes 66dB gain, and is based on the Portico 5017
design. The mic pre also incorporates a polarity reverse switch and
phantom power. The separate instrument amplifier includes 30dB of gain, a
ground lift, variable phase and an instrument Thru connection.

Blended Use
Used
as a single channel device for instruments, the 517 can be used to
phase align, combine and compress direct and amplified signals. To
achieve this, use the DI for the instrument’s direct signal and the mic
preamp for the speaker cabinet signal. The blend control is used for
mixing direct and amplified signals to achieve the desired tonal blend
between the two sources, and the variphase is used to minimize or
extenuate phase cancellations between the two signals. To compress the
blended signal, the internal compressor jumper must be set to the blend
path (this is the default setting). This technique could also be used to
create a single, mixed output of a guitar and vocals.

The Compressor
Based
around a new LDR (light dependent resister) design, the 517′s
opto-coupler compressor has been simplified to a single threshold
control with auto make up gain. By default, the compressor is set to a
fixed 2:1 ratio with fixed attack and release. To set the compressor,
simply dial the threshold control down until the desired amount of
compression is achieved. An LED light indicates when the compressor is
active.

Vari-Phase

In addition to the
standard polarity reverse, the 517′s vari-phase control may be used to
adjust phase incrementally. This control is useful any time two signals
derived from the same source are combined.

For instance, even
with careful placement, the combination of close miced drums and
overheads, can often yield hollow sounding results. By using the
variable phase adjust, the direct signal can be phase rotated until the
signals are naturally aligned.

This technique is also extremely
useful when combined with the internal blend control on instruments. A
bassist, using both direct and miked signals can blend the two into a
single output, using the vari-phase to reach an optimal alignment. By
adjusting the phase in the 517, the musician or engineer can find the
absolute best mic position without regard to the phase relation to the
direct signal.

Silk
Much could be written
about this feature, suffice to say, that it gives a subtle option to
enhance sound quality in the direction of vintage modules. The silk
button reduces negative feedback and adjusts the frequency spectrum to
provide a very sweet and musical performance. Try it and make your own
judgment.

Mic Gain

Features

World-class, transformer-coupled preamp, compressor, and DI
Gain: 0 - 66dB in 6dB increments
Compressor: Single-knob opto-coupler compressor with 2:1 ratio
Blend: Determines balance of mic and DI inputs
Instrument gain: 0 - 30dB on instrument input
48V phantom power
Silk: Adds nostalgic warmth and presence when engaged
Instrument input: Front-panel TRS input and passive-through for Hi-Z sources
Polarity reverse
Threshold: When signals exceed threshold level, gain is reduced at a
controlled 2:1 ratio with fixed attack and release time constants




An extra-special tasty treat for your lunchbox from Mr. Rupert Neve. Order a Portico 517 and enjoy the silky smoothness.




Portico 517: 500 Series Mic Pre / DI / Comp Specifications:



Frequency Response: Main Output, no load, –0.2dB @ 10Hz –3dB @ 160kHz


Noise
measured at main output, unweighted, 22Hz - 22kHz, terminated 150 ohm:
Gain at unity: better than –100dBu; gain at 66dB: better than –62dBu
Equivalent Input Noise: better than –128dBu, noise factor 1.5dB




Maximum output level from 20Hz to 40kHz: +23dBu




Total
Harmonic Distortion and Noise: @ 1kHz, +20 dBu output: Main Output:
Better than 0.001% @ 20Hz, +20 dBu output: Main Output: Better than
0.002% Silk Engaged: Better than 0.2% Second harmonic


Crosstalk: Measured channel to channel: Better than –90dB @ 15kHz.
Phantom Power: +48 Volts DC +/- 1%






MS, THKL : www.music-blvd.com
















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