Integra DHC-80.3 Surround Processor and DTA-70.1 Amplifier HT Labs Measures

HT Labs Measures

Integra DHC-80.3 Surround Processor

Analog frequency response in Direct mode:
–0.05 dB at 10 Hz
–0.00 dB at 20 Hz
–0.01 dB at 20 kHz
–0.04 dB at 50 kHz

Analog frequency response with signal processing:
–0.30 dB at 10 Hz
–0.08 dB at 20 Hz
–0.28 dB at 20 kHz
–33.54 dB at 50 kHz

The above chart shows the frequency response of the left (aqua), center (green), LFE (purple), and left surround (red) channels at the preamp outputs of the Dolby Digital decoder. The left channel measures –0.01 decibels at 20 hertz and –0.28 dB at 20 kilohertz. The center channel measures –0.00 dB at 20 Hz and –0.26 dB at 20 kHz, and the left surround channel measures –0.01 dB at 20 Hz and –0.30 dB at 20 kHz. The LFE channel, normalized to the level at 40 Hz, is +0.11 dB at 20 Hz, reaches the upper –3-dB point at 96 Hz, and reaches the upper –6-dB point at 116 Hz.

Response from the multichannel input to the main output measures –0.05 dB at 10 Hz, –0.01 dB at 20 Hz, –0.01 dB at 20 kHz, and –0.04 dB at 50 kHz. The analog THD+N is less than 0.015 percent at 1 kHz with a 100-millivolt input and the volume control set to 84.5. Crosstalk with a 100-mV input was –94.93 dB left to right and –95.21 dB right to left. The signal-to-noise ratio with “A” weighting was –124.97 dBrA.—MJP

Integra DTA-70.1 Amplifier

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 111.5 watts
1% distortion at 125.2 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 119.1 watts
1% distortion at 137.7 watts

Frequency response RCA input:
–0.06 dB at 10 Hz
–0.02 dB at 20 Hz
+0.06 dB at 20 kHz
–2.63 dB at 50 kHz

Frequency response XLR input:
–0.06 dB at 10 Hz
–0.02 dB at 20 Hz
–0.05 dB at 20 kHz
–2.80 dB at 50 kHz

This graph shows that the DTA-70.1’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 154.7 watts and 1 percent distortion at 177.7 watts. Into 4 ohms, the amplifier reaches 0.1 percent distortion at 230.2 watts and 1 percent distortion at 266.7 watts. An input level of 100 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicating an overall gain of +29.02 decibels using the RCA input. When using the XLR input, a level of 200 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicating an overall gain of +23.02 dB.

THD+N from the amplifier was less than 0.033 percent at 1 kilohertz when driving 2.83 volts into an 8-ohm load using the RCA input. When using the XLR input under the same conditions, THD+N was also less than 0.033 percent. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –78.78 dB left to right and –85.55 dB right to left using the RCA inputs and –77.69 dB left to right and –92.72 dB right to left using the XLR inputs. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –109.79 dBrA using the RCA input and –106.30 using the XLR input.—MJP

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Integra
(800) 225-1946
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COMMENTS
nismo604's picture

Hi Kris, I find the colorspace issues very surprising given the Integra's ISF certification. You failed to mention that performing your fix, by turning off the VP while correcting the colorspace issue takes away any of the scaling, deinterlacing etc. ISF modes no longer work. So what is the point of having the VP if you have to turn it off to correct the colorspace issue. In regards to the ISF certification, shouldn't color accuracy be one of the first things on their list when they certify a product?

Kris Deering's picture
ISF certification seems to be a tricky thing. It doesn't mean that a device is actually calibrated correctly, only that certain parameters are adjustable within the device to allow for calibration. But it doesn't seem to require a certain level of calibration either. Some devices only allow for grayscale or gamma while omitting color. It is true that turning off the VP will disable a lot of the features the Integra offers on the video side, so you'll have to decide whether the trade-off is worth it in your system. Some people's display will have just as good of de-interlacing/scaling as the Integra. I was also hoping that by mentioning the issue within the review, Integra would take action to fix it with a firmware update. I haven't heard if this has happened yet though.
Locksley's picture

Having just bought the 80.2 I was wondering if there has been any changes more than in the video department in the newer 80.3.
As the 80.2 has the spec for HDMI 1.4a it too ought to be ready for 4k, and that was one reason I was all right buying the older model.

I also uses the "through" on video signals when they are 1080p as I see no benefit on messing with the signal in too many stages. And with the 4k displays seem to have a very good upscaling system (thinking about the Sharp displays) I have a hard time differentiating between the real useful upgrade of the 80.3 compared to the 80.2.

Thus my question if Integra like most other audio manufactures have the yearly "new model" disease ;)

Also the big difference between Onkey and Integra seems to be lower tolerance components. And that brings up an other query, has anybody checked for Counterfeit components, that seems to be a big problem in the electronic industry?

!!! For Bi-amping your fronts the rear channels are sacrificed, but why are we not given the choice of using the Front Hight or Front Wide as a replacement instead? Is it more than just reprogramming the firmware?

Worth mentioning is how sensitive the Audyssey mic is to vibrations. When I go to lengths to isolate the microphone (soft material instead of using the screw fitting) and dampen the stand there is a totally different measurement of the bas. My guess is that is one reason why Pro gets a better results, since the microphone is heavier and thus less prone to vibrate with the bas.

Ah, oh, and one reason I went with Integra was to use the XLR outputs, but now I am thinking that the unit is not using it in it's internal pathways and sets a transformer on the output. Guess I'll pull out my RCA and see if I can detect any sonic difference.

Thanks for the review!

Clayton72's picture

Is Integra keeping to their annual release schedule?

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