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Integra DTA-70.1 THX Certified Amplifier First Look

Integra DTA-70.1 THX Certified Amplifier

Integra DTA-70.1 THX Certified Amplifier


  • Product Name: DTA-70.1 THX Certified Amplifier
  • Manufacturer: Integra
  • Review Date: April 12, 2010 13:00
  • MSRP: $1800
  • First Impression: Pretty Cool
  • Power Output: All Channels: 150 W /Ch at 8 ohms, 20 Hz-20 kHz, 0.05%, 2 channels driven
  • FTC Dynamic Power: 400 W (3 ohms, Front) 300 W (4 ohms, Front) 180 W (8 ohms, Front)
  • THD (Total Harmonic Distortion): 0.05% (Rated power)
  • Damping Factor: 60 (Front, 1 kHz, 8 ohms)
  • Input Sensitivity and Impedance: 1 V/47 kohms (Balanced) 2 V/22 kohms (Unbalanced)
  • Frequency Response: 5 Hz-100 kHz/+1 dB, -3 dB
  • Signal-to-Noise Ratio: 110 dB (Unbalanced, IHF-A)
  • Speaker Impedance: 4 ohms-16 ohms or 6 ohms-16 ohms
  • Power Supply: AC 120 V~, 60 Hz
  • Power Consumption: 11.7 Amps
  • Dimensions: (W x H x D):17 1/8" x 7 13/16" x 17 1/2" (435 x 198.5 x 445 mm)
  • Weight: 50.7 lbs. (23.0 kg)

When planning a home theater, it often pays to plan ahead. You need to be cognizant of the recent trends in home theater so that you can not only plan for what you want but for what you'll want in the future. Let's be honest, not so long ago none of us would have guessed that height and width channels would be here so soon. While they have yet to be integrated into the different high (or low for that matter) end audio formats, they have been receiving some positive reviews in professional publications and consumer reviews.

The fact is that many of us are not exactly prepared for more than seven channels of amplification. Oh, we may have seven channels for our main room and more for separate zones but that's about it. One thing we firmly believe around here is that an amplifier is almost never a bad purchase. As long as you get one that is linear and powerful and doesn't add anything to the signal you'll be fine. Plus, when it comes time to upgrade, you'll have the amps necessary to do so.

Integra has released it's first THX certified nine channel amplifier. The DTA-70.1 is designed to work in conjunction with the DHC-80.1 processor to provide not only the seven channels you'll need for a full surround experience, but two additional channels for height or width channels. For those that are saying to themselves that they have a smaller room so they don't need all those amps we once again point out future-proofing your purchases. While speakers, receivers, and transports come and go, a good amp is forever.


So, when you are looking for an amp from a manufacturer like Integra, what do you want to see? Since you know the price tag will be hefty, you want as many features as possible along with stunning aesthetics and bulletproof build quality. The new Integra DTA-70.1 sports an all analogue discrete-component design. It has an 11.7-Amp power supply with a massive toroidal power transformer with dual 22,000 µF capacitors. Each channel has identical symmetric circuit layouts, configured in a push-pull topology utilizing high-performance three-stage inverted Darlington circuitry and powerful custom-designed output transistors. While the specifications state the DTA-70.1 has 150 watts into 2 channels at 8 ohms, the FTC Dynamic Power specification is 180 Watts into 8 ohms, and 400 Watts into 3 ohms. The power bandwidth is 5 Hz to 100 kHz, +/-3dB, and the IHF A-weighted signal to noise ratio is an excellent 110 dB.


As you'd expect with a product at this price point, the DTA-70.1 sports a lot of aluminum including a solid aluminum front panel with the requisite blue LED indicator. While it doesn't have the pretty meters of something like a McIntosh, it does have an attractively concaved front and all black finish. On the back you'll find labeled inputs and color-coded outputs. You have access to both balanced and unbalanced connections and a switch for 4 or 8 ohm operation. There is twelve volt trigger input available (via 3.5mm plug) and Auto On through signal sensing. The vertical arrangement of the amps has been in use for a number of years with different products and resembles some of the blade amps we've seen in the past. This means that each channel is identical in construction and (theoretically) easier to service.

Lastly, the Integra DTA-70.1 has received THX's highest rating - Ultra2. While certain events recently have case a bit of a pall on the THX certification process in general, remember that each device type goes through a different process. With amps, the focus is on the ability to drive all of the speakers in a modern home theater system to full THX output levels and beyond. This is not just for a single or a few speakers - but for all of them. In the case of the DTA-70.1 it means (according to Integra since THX has always been tight lipped about their standards) all nine channels driven. Now we don't know the size of the room or the speakers used, but you can bet that at the very least you're getting a quality amp. It may be a bit more expensive because of the THX logo, but the question is how much is that piece of mind worth?


The DTA-70.1 amp from Integra looks like quite a beast. At over 50 lbs it certainly weighs like one. It's got all the right parts and talk for a high end amp. It's sort of hard to really come to grips with the overall sense of the amp without a formal review and test bench results. The components all look and sound to be right but at $1,800, it seems like a bit of a mystery. For a high end offering, we'd expect a higher price tag but for a budget one we'd expect lower. At 150 watts per channel, there are a lot of receivers out there that claim similar power (but in actuality don't have the headroom or have fudged their measurements). At 200 watts per channel, you tend to get a bit more respect but to hit those power levels on a continuous basis requires larger heatsinks and power supplies which adds cost and weight.  Such a model may be best reserved for an Integra Research product should Onkyo ever rebirth that brand.  As a mate to the $2,300 DHC-80.1, the price comes a little more in focus. We think this amp will be very attractive to those that have already committed to shelling out the money for the Integra Pre/Pro. For those that haven't... well... it still looks pretty good, if pricey.

For more information, please visit integrahometheater.com.

Unless otherwise indicated, this is a preview article for the featured product. A formal review may or may not follow in the future.

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As Associate Editor at Audioholics, Tom promises to the best of his ability to give each review the same amount of attention, consideration, and thoughtfulness as possible and keep his writings free from undue bias and preconceptions. Any indication, either internally or from another, that bias has entered into his review will be immediately investigated. Substantiation of mistakes or bias will be immediately corrected regardless of personal stake, feelings, or ego.

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