Input

Balanced, using “Transformer-Like-Amplifier” (T.L.A.) with toroidal Common Mode Rejection Low Pass Filter that excludes frequencies above 150 kHz.

 The T.L.A. is followed by an actual input transformer permitting a full +26 dBu input signal to be handled at unity gain without an input pad over the whole audio spectrum.

Input Impedance

10,000 Ohms + or 20%

Noise

Measured at Main Output

Input terminated with 150 Ohms

Measured over band limited 22Hz-22kHz, Unweighted

With Gain at Unity: Better than 100 dBu.

With Gain at 66 dB: Better than 62 dBu

Equivalent Input Noise (E.I.N.) Better than 128 dBu

Frequency Response:Main Output, no load

@ 10 Hz, 0.2 dB

@ 160 kHz 3 dB

Buss Output

@ 10 Hz 0.2 dB

@ 160 kHz 3 dB

High Pass Filter

Swept Frequency continuously variable from 20 Hz to 250 Hz.

Slope: 12 dB/Octave

Gain

Switched Gain from Unity to +66dB in 6 dB steps

Trim”:

Continuously adjustable potentiometer from 6dB to +6dB with reference to setting on the Gain Switch.

Maximum Output Level

Balanced and Floating Transformer Output from 20 Hz to 40 kHz: +25 dBu. (Clips at just over +26 dBu)

Mute

Mutes Main Output only. (i.e. Monitor remains Live)

Total Harmonic Distortion and Noise

Main Output

@ 1kHz, +20 dBu output

level, no load:

Better than 0.001%.

(No high order Harmonics)

Silk Engaged

Approximately 0.2% Second Harmonic

Main Output

@ 20Hz, +20 dBu output

level, no load: Better than 0.01%.

SILK

The 5015 uses mainly single-sided amplifier circuitry that excludes any possibility of crossover distortion. The “SILK” button reduces negative feedback and adjusts the frequency spectrum to provide a very sweet and musical performance

Buss Output

The Buss Output is designed to feed other Portico Series modules with Buss Inputs.

Crosstalk:Measured Channel to Channel

Better than 90 dB @ 15kHz.

Phantom Power

+48 Volts DC +/- 1%

Main Power Required: (From External Power Unit)

Voltage Range, 9 to 18 Volts DC.

Current consumption

@ 9VDC = 1.3 A typical

@12VDC = 1A typical

@15VDC= 800 mA typical

@18VDC= 650 mA typical

Rear Panel Power Connector

5.5mm X 2.1mm DC jack, Center Positive