SR7002 Measurements and Analysis Report
Measurements and Commentary by Gene DellaSala
Frequency Response

Marantz
SR7002 Frequency Response
The -3dB point for the SR7002 was around 125kHz at 1 watt and full power illustrating a very uniform power response which is to be expected with a receiver of this caliber.
Marantz
SR7002 Power vs Distortion
I measured continuous power vs distortion by setting up a regulated sweep in my Audio Precision to automatically adjust input level until the maximum power output is achieved at < 0.1% THD + N. The SR7002 was plugged directly into an APC S-15 Power Conditioner with regulation to ensure the line never dropped below 118Vrms.
Power output: <0.1% THD + N
- 144wpc x 1 @ 8-ohms
- 128wpc x 2 @ 8-ohms
- 180wpc x 1 @ 4-ohms
- 170wpc x 2 @ 4-ohms
Keep in mind most review publications don’t do continuous power measurements and they usually publish power measurements into clipping at 1% THD + N. Our measurements are very conservative and it is clear that the 110wpc power rating of this receiver is greatly understated as Marantz is delivering MUCH more than specified.
For more info on amplifier measurements, see: The All Channels Driven (ACD) Test
FFT Distortion Analysis

Marantz
SR7002 FFT Distortion Analysis at Full Rated Power
At full rated power (110wpc, 8 ohms) the SR7002 exhibited very good distortion measurements (28.75+ 47.33)dBv =83.5dBv or 100*alog^-1(-76.1 /20) = .002 THD + N. These results (especially odd order harmonics) weren’t quite as low as I measured on similar priced Yamaha and Denon receivers but still good nonetheless.
SNR @ 1 watt
With 200mV in and driving the amp to 1 watt at 8-ohms, I measured a good Signal to Noise Ratio of around 70dB (unweighted).
Output Impedance vs Frequency

Marantz
SR7002 Output Impedance vs Frequency
The SR7002 exhibited respectably low output impedance maintaining around 100mohms for the audible frequency range of 20Hz to 20kHz when driving 8-ohm and 4-ohm loads. This ensures that the amp will perform consistently under a wide variety of speaker loads.

Marantz
SR7002 Damping Factor vs Frequency
The SR7002, displayed a good damping factor which was not surprising based on the low output impedance the amp section exhibited. The damping factor for the SR7002 maintained above the minimum of 50 we like to see when driving an 8-ohm load and roughly 1/2 that (as it should) when driving 4 ohm loads.
See also:
mpedris;408262
How might the SR-7002 drive a 4 ohm or 6 ohm load continuously?
A friend is considering buying this receiver to drive the Mirage OMD-5 (rated at 6 ohms) or Sonus Faber Concertino (rated at 4 ohms).
Might a Denon AVR-3808 do a better job at driving the said speakers?
Thanks in advance for any help.
IMO, I wouldn't even consider driving 4ohm speakers continuously on a receiver point.
6ohm might be ok... check the manual/call for tech support.
A friend is considering buying this receiver to drive the Mirage OMD-5 (rated at 6 ohms) or Sonus Faber Concertino (rated at 4 ohms).
Might a Denon AVR-3808 do a better job at driving the said speakers?
Thanks in advance for any help.
What is your experience with the latest Harman Kardon AVR 247 product?
I am putting together my HT setup and purchased this unit, still new in the box, and haven't installed it yet but reading all the current "problems" should I switch to the Onkyo 605 or 606 for better quality and sound?
Being new to HT, is there an appreciable sound/video quality difference with 1.3 vs. my Harman AVR 247's 1.1 (1.2?) setup?
I would like the best sound and picture in this price range.
Thank you for any help!
Gary
Regarding its video capabilities, if I get a Blu Ray player such as the Panasonic BDP HDK 50 (or 30) and play a regular DVD (not Blu Ray), will the Blu Ray player upscale to 1080p, and so are the "limitations" of the Marantz video upscaling irrelevant (it only upconverts 480i/p via HDMI)?
Thanks, geraldan (a newbie to all of this technical stuff!)
