SKU: 46237750849

VAC Sigma 170i Integrated Amplifier

Sale price$4905.00 Regular price$5450.00
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Description

VAC Sigma 170i Integrated AmplifierThis product may be subject to availability and manufacturer restrictions. Contact us for more information or to schedule an appointment! Welcome to the world of high end audio with the VAC Sigma 170i Integrated Amplifier. This innovative product is the world's first integrated amplifier equipped with the patented iQ Continuous Intelligent Automatic Bias System. This revolutionary system ensures the true idle point of the output tubes remains steady

This product may be subject to availability and manufacturer restrictions. Contact us for more information or to schedule an appointment!

Welcome to the world of high-end audio with the VAC Sigma 170i Integrated Amplifier. This innovative product is the world's first integrated amplifier equipped with the patented iQ Continuous Intelligent Automatic Bias System. This revolutionary system ensures the true idle point of the output tubes remains steady under all conditions, enhancing detail and dynamics while reducing distortion and noise.

The VAC Sigma 170i is not just an amplifier; it's a lifestyle choice. It offers all the benefits of tube amplifiers without the worry. With an output of 85 watts per channel, it's ready to be the heart of your high-end musical experience.

The Sigma 170i comes with optional MM/MC phono and balanced inputs, making it a versatile choice for any audiophile. It features a pure vacuum tube audio circuitry, a true Class A triode tube line stage, and a pure analogue volume control.

The amplifier is also equipped with a cinema bypass mode for tie-in to home theater, a remote control, and four inputs. It offers optional features such as MM/MC phono with adjustable MC loading, balanced input, and a perforated tube cage (required for CE countries).

The Sigma 170i is handcrafted in the United States by VAC and comes with a fascia available in black or silver metal flake paint, hard chrome knobs, and an iQ display bar. It uses Gold Lion KT88 output tubes and premium Cardas RCA & speaker connectors.

The Special Edition version of the Sigma 170i uses the Statement Series line input transformers with the balanced option and incorporates exotic capacitors and resistors in key circuit locations for a larger, more vivid, detailed, and organic presentation.

Technical Specification:

Specification Details
Wattage 85 watts/channel
Power Bandwidth 13 Hz to 70 kHz
Inputs Four line level inputs plus one Cinema Bypass input, Optional balanced input on Input 4, Optional MM/MC phono on Input 1
Outputs Connections to precisely match loudspeaker loads of 4, 8 and 16 ohms
Tubes 4x KT88, 5x 12AU7A, 1x 12AX7A
Voltage May be factory-configured for operation at 100, 120, 220, or 230/240 volts
Power Cord Detachable power cord, standard IEC power receptacle
Remote Control Volume & Mute, included
Finish Hand-rubbed gold-flake gloss black lacquer fascia with chrome knobs standard, Hand-rubbed metallic gloss silver lacquer fascia with chrome knobs special order with additional cost
Warranty Two years parts and labor, excluding tubes (USA, see manual for full details)
Dimensions (H x W x D) 8 x 18 x 17.3 in. (203 x 457 x 440 mm.)
 Weight 71 lbs. (32 kg.)
Phono Option Gain: 37 dB MM, 57 dB MC, Frequency Response: RIAA +/‑ 0.2 dB, Residual Noise: 3 mV at output (S/N ratio approx. 69 dB), Overload: 117 mV @ 1 kHz = 8volts RMS output; 460 mV @ 10 kHz, Variable loading: Yes for MC, Tubes: 2x 12AX7A

 

Experience the magic of the VAC Sigma 170i Integrated Amplifier today. It's not just an amplifier; it's a love letter to the much-revered KT88. As Ken Kessler from hi-fi news puts it, "Damn, this is a fine amp... it laughed at everything I could throw at it, delivering via Sasha DAWs the kind of levels and soundstage which did justice to the scale of both 'big band' and classical orchestras. It's a love letter to the much-revered KT88, and it left me stunned."

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 46237750849

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Alex
Houston, US
★★★★★ 5
Great adhesive and easy to separate
Style: 30 pcs
​The first thing I noticed was the quality of the adhesive. It’s incredibly tacky, which is exactly what you want—once it’s pressed down, it isn't going anywhere.It was easy to trim with a standard pair of scissors. Definitely makes a huge difference in rattles and quality of music inside the cabin. highly recommend and great quality for the money. The back comes off with ease and super easy to cut and place.
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Reviewed in the United States on May 15, 2026
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Aleah
Whiting, US
★★★★★ 4
It’s not bad read my review
Style: 30 pcs
It wasn’t too bad as a finisher on top of actual sound deadening. However, be sure you apply it where you want it as it does not come off. If you try to pull it off, it leaves a nasty residue and some of the foam sticks to said residue
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Reviewed in the United States on June 8, 2026
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Jayme
Grantham, US
★★★★★ 5
Not top grade
Style: 30 pcs
I didn't have a chance to install although I've would been very excited.
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Reviewed in the United States on June 7, 2026
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Jack Swidecki
Whiting, US
★★★★★ 5
Worth the buy
Style: 30 pcs, Style: 30 pcs
Put in my 1991 f250 super cab and it did the whole bottom and then some. Works spectacularly
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Reviewed in the United States on May 21, 2026
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james
Natrona Heights, US
★★★★★ 5
Would recommend
Size: 10 sqft
I used this sound deadening material in my car during an audio and interior upgrade, and the difference was noticeable immediately. Road noise, vibrations, and rattling were reduced a lot, especially on the doors and floor panels. The car feels much quieter and more solid while driving now. The material was easy to cut and apply, and the adhesive stuck very well without peeling up. It has a quality feel to it and conforms nicely around curves and tight areas. I also noticed my speakers sound cleaner and have better bass response after installing it. For the price, this sound deadening material is a great value and definitely worth it if you want a quieter ride and better overall sound quality in your vehicle.
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Reviewed in the United States on June 6, 2026

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