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Avid Hifi

AVID Sigsum Integrated Amplifier

AVID Sigsum Integrated Amplifier

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Regular price £16,000.00
Regular price Sale price £16,000.00
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  • Free Delivery
  • Demo Available
  • Trade-in Available
  • 5 year Warranty
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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 the 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 give 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 to hear every detail with such life and realism.

And not forgetting our vinyl roots the built-in phono stage is the same as our award-winning Pulsus phono stage.
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.





: 110W 8 Ohms

Harmonic distortion

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

Loudspeaker Impedance

: 4-16 Ohms


: ALPS RK 50 2 Gang Manual Volume Control

: Selector Switch

: Mute Switch

: Mono Switch

: Headphone Socket



: 2x RCA


: 48dB – 60dB – 70dB

Input resistance

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

Input capacitance

: 100pF – 200pF – 500pF


: 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


: 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


: 4 x Gold Plated High Current

Line level output

: 2x RCA


Nominal output level

: 11 V

Output impedance

: 47 Ohms


Maximum output level into 600 Ohms

: 10 V RMS

Output impedance

: 1 Ohm

Load range

: 20 — 600 Ohm


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 (including output terminals)

: 471 x 500 x 190mm (WxDxH)

Net weight

: 31.2kg (69lb)


: 600 x 570 x 260mm (WxDxH)

Shipping weight

: 34.5kgKg (76lb)

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AVID Sigsum Integrated Amplifier
AVID Sigsum Integrated Amplifier

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AVID Sigsum Integrated Amplifier
AVID Sigsum Integrated Amplifier



Delivery & Returns

Delivery & Returns

We offer FREE delivery to the mainland UK (excluding Channel Islands, Isle of Man, Isle of White, Isles of Scilly, and some of the remote Scottish Isles).

For other areas please contact us for a quote. Select items can be delivered internationally by prior agreement. Again please contact us for a quote. We will always do our best to help.

Our aim is to dispatch goods within 2 working days of an order being placed. Please allow 5 working days from the time of your order to receipt of item. If an order is expected to take longer than this our order fulfillment department will contact you to inform you of this.

Where multiple items are ordered, we will dispatch them all in one package. If you have ordered any special or customized items, or items otherwise not immediately available, we will dispatch the order when all items are available. If you have any concerns regarding this, please contact us and we will do are very best to help you.