Sigsum Integrated Amplifier


SIGSUM Integrated Amplifier.        'The SUM of two SIGnal's....SIGSUM'

The Sigsum Integrated Amplifier is a logical development of our cascading product design.
In all our designs, we are driven by sound quality and an uncompromising approach to offer the best in category.

Sigsum shares many of the extremely high-specification components found in our Reference electronics, every attribute to the highest order.
Within an integrated amplifier there are four main building blocks; power supply, pre-amplifier topology, power amplifier and volume control.
Like a jigsaw puzzle, every part needs to be perfect and then fit together perfectly, the weakest part letting everything down.

In our obsession to offer the best we have not fallen short on any of these building blocks that make up this integrated amplifier.
Power Supply; massive 1.1KVA mains transformer and large capacitors gives prodigious reserves and the sound has slam and low frequency control.
Pre-amplifier topology; bespoke circuit design and components allowing faithful reproduction with limitless headroom.
Power amplifier; directly scaled down reference power amplifier with the ability to drive all loudspeakers comfortably.
Volume control; retaining possibly the world’s best control, the ALPS RK50 allows you hear every detail with such life and realism.

And not forgetting our vinyl roots the built-in phonostage is the same as our award winning Pulsus phonostage.
A passive RIAA (with Neumann HF correction) circuit using high-end capacitors, helps maintain linearity of reproduction and its own 35va mains transformer giving independent power to each channel. Fully flexible for any cartridge with gain and resistance easily adjustable.

Like all our product's, Sigsum is passionately manufactured within our own facilities, everything from PCB assembly, testing and quality control to the high quality casework ensures a long-lasting reliable product, allowing you to rediscover your music collection.

In a world of specifications and audio jewellery the Sigsum is old school passionate design done right.
Just listen, you'll find no fake performance, just the ability to strike fire in the heart and tears of emotion.



Specifications


POWER

Output

: 110W 8 Ohms

Harmonic distortion

: 0.003% (80% power 8 Ohms 1kHz)

Loudspeaker Impedance

: 4-16 Ohms

FRONT PANEL CONTROLS

: ALPS RK 50 2 Gang Manual Volume Control

: Selector Switch

: Mute Switch

: Mono Switch

: Headphone Socket

INPUTS

PHONO

: 2x RCA

Gain

: 48dB – 60dB – 70dB

Input resistance

: 100R – 300R - 500R – 1K – 5K – 10K – 47K

Input capacitance

: 100pF – 200pF – 500pF

Distortion

: Less than 0.001%

RIAA Accuracy

: 5Hz - 70kHz +/-0.5dB (Neumann HF correction)

Noise (A weighted)

: MM –81dB       MC –67dB (high setting)

Channel separation

: < -85dB 5Hz – 20KHz

Power supply

: Independant 35va transformer

LINE

: 4x XLR      4x RCA

Nominal sensitivity

: 340mV Volume Full 100W XLR

Input resistance

: 33 kOhms   XLR      82 kOhms   RCA

Maximum input

: 11 Vrms XLR

Frequency response

: 5Hz—over 80kHz ± 1dB

Signal/noise ratio

: 100 dB - XLR/RCA (Awtd) 50 W, ref. 1V input

OUTPUTS

: 4 x Gold Plated High Current

Line level output

: 2x RCA

PREAMPLIFIER OUTPUT

Nominal output level

: 11 V

Output impedance

: 47 Ohms

HEADPHONE OUTPUT

Maximum output level into 600 Ohms

: 10 V RMS

Output impedance

: 1 Ohm

Load range

: 20 — 600 Ohm

POWER CONSUMPTION

Input voltage (region dependent)

: 115V or 230V AC

Power Consumption (Max)

: 59 Watts No Signal Idle

: 800 Watts Clipping 4 Ohm Load

Mains input Socket

: IEC C14 Type

Mains input Cable

: IEC C13 Type

DIMENSIONS AND WEIGHTS

Dimensions (including output terminals)

: 471 x 500 x 190mm (WxDxH)

Net weight

: 31.2kg (69lb)

Packaging

: 600 x 570 x 260mm (WxDxH)

Shipping weight

: 34.5kgKg (76lb)

AVID reserves the right to improve or change its products without notice at any time.