I/70 Integrated Amplifier By Audio Research
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Product Summary:
The I/70 integrated tube amplifier delivers 70 watts per channel with KT120 tubes, headphone output, auto-bias operation, and optional internal DAC and Phono Preamplifier. Refined styling, combining powerful dynamics, rich musicality, and versatile performance in a compact high-end design.
Click To Read MoreTrial Period
90 Days (Exchange)
Countries Shipped
USA
Burn-In Time
100 Hours
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Price:
Amplifiers, Audio Research, Integrated Amplifiers, Tube Amplifiers
I/70 Integrated Amplifier By Audio Research
$9,950
The I/70 integrated tube amplifier delivers 70 watts per channel with KT120 tubes, headphone output, auto-bias operation, and optional internal DAC and Phono Preamplifier. Refined styling, combining powerful dynamics, rich musicality, and versatile performance in a compact high-end design.
Click To Read MoreProduct Description
The I/70 integrated amplifier delivers the warmth and musicality of tube audio in a refined, space-saving design that combines high-performance preamplifier and amplifier technology into one elegant component.
Its sophisticated styling draws inspiration from flagship reference models, featuring anodized aluminum accents, precision-machined detailing, and a fully enclosed transformer section for a modern, premium appearance. Available in black or silver finishes, the design blends classic tube aesthetics with contemporary craftsmanship.
Inside, the I/70 incorporates high-quality output transformers and four KT120 output tubes to produce 70 watts per channel of powerful, dynamic sound. The result is impressive control, clarity, and resolution with the rich tonal character tube enthusiasts value.
Automatic biasing helps maintain consistent performance without manual adjustment, making everyday operation simple and reliable.
Designed to pair confidently with a wide range of loudspeakers, including floor-standing models, the I/70 offers a spacious, authoritative presentation with exceptional musical engagement.
The integrated design includes independent tube preamplifier and power amplifier sections, along with stereo preamplifier outputs for added system flexibility, including connection to powered subwoofers.
A precision 75-step volume control allows fine adjustment across varying recording levels, while the dedicated headphone output—driven directly by the KT120 tubes—delivers an immersive personal listening experience for high-end headphones.
Digital connectivity is equally impressive, with a high-resolution DAC supporting USB, Optical, Coaxial, and Bluetooth inputs. Advanced upsampling technology enhances detail, transparency, and tonal purity for exceptional digital playback.
Additional connectivity includes three single-ended inputs and one balanced XLR input. An optional phono stage supports both moving magnet and moving coil cartridges, with adjustable gain and loading settings accessible via remote control.
Combining power, finesse, and versatility, the I/70 offers a premium tube audio experience with the performance and musicality typically associated with far larger separate components.
Reviews
Enjoy The Music
“Audio Search’s I/70 stereo unit is built like a tank and should last for decades. For some lucky soul, this vacuum tube unit with Hi-Res DAC and high-end audio MM/MC phono stage option will be a time machine that takes you back to memories of both today and long ago. Sit down, get comfortable, dim the lights, open your ears, and… enjoy the music.”
Architeg Prints
“Whether you’re a devoted tube enthusiast or a curious new listener, the Audio Research I/70 integrated amplifier deserves a listen. It proves that even a brand synonymous with tubes can successfully embrace solid-state design without losing the essence that made it famous.”
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Specifications
- Power Output:
- 70 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% per channel, below 0.1% at 1 watt
- (Note that actual power output is dependent upon both line voltage and “conditioning” i.e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not critical.)
- Power Bandwidth: (-3dB points) 10Hz to 22kHz
- Frequency Response: (-3dB points at 1 watt) 7Hz to 30kHz
- Input Sensitivity: 1.25V RMS for rated output
- Input Impedance: 100K ohms Balanced, 48K ohms Single Ended
- Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
- Input Impedance:
- 100K ohms Balanced, 50K ohms SE
- 8 Inputs – 4 balanced, 4 single-ended
- Output Taps: 8 ohms, 4 ohms
- Power Requirements
- 105-130VAC 60Hz (210-250VAC 50Hz)
- 420 watts at rated output, 220 watts at “idle.”
- Tube Required: 2 matched pair KT120; 3-6922 (1 input, 2 driver)
- Dimensions:
- Width 16.5” (42 cm)
- Height 8.25” (21 cm)
- Depth 13.5” (34 cm)
- Weight: 55 lbs (25 kg); 66 lbs (30 kg) shipping weight
Know more details about products
Product Description
PSM156 Studio Master Mains Purifier
The PSM156 Power Conditioner builds on the success of the acclaimed PSM136, featuring symmetrically balanced circuitry and six fully independent outputs for optimal performance. With 52 independently tuned filter elements, it reduces noise while enhancing detail, dynamics, and overall system precision.
Experience crisper, more defined audio, with believable instrument timbres and a three-dimensional soundstage that extends beyond your speakers. The PSM156 allows your system to perform at its best, making every recording more engaging, immersive, and enjoyable.
- Includes your choice of the 2.0M Puritan Classic+ or Ultimate XX mains cable. Your mains cable is the most important power cable in your system. The Ultimate XX cable is the better choice for systems with highly resolving, reference-level components.
Reviews
The Audiophile Man
“I was impressed by two things from the Puritan. The decrease in the amount of noise allowed me to hear more information, enhancing all frequencies over the soundstage. The improvement in clarity and focus also helped the music to flow and eradicated harmful frequencies that sometimes demanded hands over the ears. More than that, though, while noise was reduced, the dynamics were never reduced. Hence, the music retained its life and vigour. I never thought that the ‘treated’ music ever sounded dull which is a great tribute to the design. The Puritan PSM156 is an ideal method to treat mains noise and distortive elements, letting you hear more music which is, after all, the point of hi-fi.”
https://jaguaraudio.com/wp-content/uploads/2022/02/PSM156-Audiophile-Man-Review.pdf
6Moons (Blue Moon Award Winner!)
“On the playground of our resident hardware, I personally see no compelling reason to spend more on AC power filtering even for our top system. The PSM156 hits very hard but within the 2019 status quo of its segment, remains priced very fair. That makes it an exciting highly commendable discovery!”
https://6moons.com/audioreview_articles/puritan/
Stereo Times (Most Wanted Component of 2019 Award)
“We always seek to provide honest great value with solidly engineered products designed to last a very long time indeed. There are enough regular new flavors of every other component out there crying out for our attention and cash, a mains management solution should be a buy-enjoy-but-just-leave-it-there investment.”
http://v2.stereotimes.com/post/puritan-audio-laboratories-psm156-power-conditioner/
Specifications
- Rebalances the AC sine wave removing the DC component, preventing transformer buzz, and allowing them to breathe properly at full efficiency.
- Six 15 Amp Outlets each with independent refilter stages for both common and differential mode disturbances avoiding cross-contamination between connected equipment.
- 52 cumulative stages of purification remove common and differential mode interference, enhancing clarity, staging, and dynamics.
- Equal resistance routing to all outputs realizes full dynamic performance.
- An integral earth management system inbuilt with cleansed ground and star earthing format further lowers the noise floor and further enhances clarity and dynamics.
- Internal wiring silver-plated OFC copper PTFE insulated.
- Massive 9,000 Amps Repetitive Rating, three-dimensional, non-sacrificial voltage surge protection.
- Rated Voltage 110-250v AC 50/60Hz
- IEC Type C20 Input
- Electrically and magnetically shielded casing.
- Dimensions W430, D230, H110.
- Manufactured in the UK
- 5 Year Warranty
- Awarded a 6 Moons Blue Moon (reserved only for “outstanding” products of “rare excellence”).
- Awarded “Product of the Decade” and “Publishers Choice” by The Stereo Times
Reviews
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