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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Boise, US
★★★★★ 5
Perfect for my dog
Color: Blue Puppy, Size: Medium Size 2
My dog (16 lb) LOVES to whip her toys around and throw them in the air to chase after them. This is the perfect toy for her to play outside by herself. I would repurchase for her over and over again if needed!
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Reviewed in the United States on May 18, 2026
B
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Beach Lover (Sue)
Carnegie, US
★★★★★ 5
Pup loves this!
Color: Blue Puppy, Size: Medium Size 2
My pup loves his soccer balls. These are very durable although if you have a dog that doesn't grasp the concept of using the loops/straps to carry it, teeth could puncture it. They are a good value for the money if your dog likes to chase the ball, I get the smaller size ball for my dog (medium dog). They come with a pump but if you have a bicycle pump or a battery operated pump, it will fill much faster. Ours stay outside and even in the winter, they hold up well, just need a bit more air occasionally to keep it pumped up.
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Reviewed in the United States on December 16, 2025
N
Verified Purchase
Natalie
Louisville, US
★★★★★ 5
Strong Toy
Color: Blue Puppy, Size: Medium Size 2
My dog loves this toy and lasted months. Just ordered a new one.
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Reviewed in the United States on April 13, 2026
G
Verified Purchase
Geege
West Palm Beach, US
★★★★★ 3
Well that didn't last long!
Color: Blue Puppy, Size: Medium Size 2
He loved it for the 15 minutes it took to destroy it! Cute design, but the material was thin enough to penetrate with his teeth and it was all over in a very short time! He still carries the carcass around and tries to play with it...it's sad. Definitely not for strong chewers.
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Reviewed in the United States on January 17, 2026
A
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Ash
Birmingham, US
★★★★★ 4
Decent ball
Color: Blue Puppy, Size: Medium Size 2
Context: I have a busy, anxious Corgi. I like that it came with a pump to air it up. My dog likes the tag feature on it which made the ball easy to carry. She chewed off the tags pretty quick. She didn’t like herding this one as much. She prefers herding a basketball over this ball. The ball sits in the backyard through all the weather and elements and has held up pretty well. We’ve had it about a year and it’s still a good toy.
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Reviewed in the United States on April 10, 2026

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