Marantz AV7005 Surround Processor and MM7055 Amplifier HT Labs Measures

HT Labs Measures

Marantz AV7005 Surround Processor

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

Analog frequency response with signal processing:
–0.45 dB at 10 Hz
–0.13 dB at 20 Hz
–0.14 dB at 20 kHz
–15.66 dB at 50 kHz

The above chart shows the frequency response of the left (aqua), center (green), left surround (red), and LFE (purple) channels at the preamp outputs of the Dolby Digital decoder. The left channel measures –0.07 decibels at 20 hertz and –0.23 dB at 20 kilohertz. The center channel measures –0.08 dB at 20 Hz and –0.09 dB at 20 kHz, and the left surround channel measures –0.08 dB at 20 Hz and –0.24 dB at 20 kHz. The LFE channel, normalized to the level at 40 Hz, is –0.01 dB at 20 Hz, reaches the upper –3-dB point at 118 Hz, and reaches the upper –6-dB point at 121 Hz.

Response from the multichannel input to the main output measures –0.06 dB at 10 Hz, –0.01 dB at 20 Hz, –0.01 dB at 20 kHz, and –0.07 dB at 50 kHz. The analog THD+N is less than 0.023 percent at 1 kHz with a 100-millivolt input and the volume control set to –4.0. Crosstalk with a 100-mV input was –87.87 dB left to right and –87.25 dB right to left. The signal-to-noise ratio with “A” weighting was –121.49 dBrA.—MJP

Marantz MM7055 Amplifier

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 107.8 watts
1% distortion at 117.8 watts

Frequency response RCA input:
–0.16 dB at 10 Hz
–0.05 dB at 20 Hz
–0.07 dB at 20 kHz
–2.83 dB at 50 kHz

Frequency response XLR input:
–0.19 dB at 10 Hz
–0.06 dB at 20 Hz
–0.06 dB at 20 kHz
–2.88 dB at 50 kHz

This graph shows that the MM7055’s left amplifier channel, with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 130.7 watts and 1 percent distortion at 152.8 watts. Into 4 ohms, the amplifier reaches 0.1 percent distortion at 215.8 watts and 1 percent distortion at 236.4 watts. An input level of 101.9 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicating an overall gain of +28.91 decibels using the RCA input. When using the XLR input, a level of 198.0 millivolts was required to produce an output of 2.83 volts into an 8-ohm load, indicating an overall gain of +23.16 dB.

THD+N from the amplifier was less than 0.007 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 less than 0.014 percent. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –85.57 dB left to right and –84.22 dB right to left using the RCA inputs and –81.05 dB left to right and –81.09 dB right to left using the XLR inputs. The signal-to-noise ratio with an 8-ohm load from 10 hertz to 24 kHz with “A” weighting was –111.44 dBrA using the RCA input and –98.63 using the XLR input.—MJP

Marantz America, Inc
(201) 762-6500

schalliol's picture

I appreciate your suggestion to use your old AVR if you can. I have a Sony STR-DA3100ES, which really does amplify well for my Paradigm Reference Studio 60s & cc-690 v.5. I use a Philips Pronto remote I can customize to make this work well as a system. I would really enjoy having the simplification of the MM7055 however, and I'm sure it's a better amp.

Even though I have a Mac Mini hooked up to the unit, I find the AirPlay to be really quite nice. Just last night I was looking through something on my iPad and there was a little video I wanted to see. I simply changed the output to the AV7005 with a quick tap and the AV7005 turned on and I could listen to the video on the system. Unfortunately the AirPlay on the AV7005 doesn't (at least yet) support video, so one has to watch locally, but since it's already in the hand, it's really not a big deal.

adumadu's picture

Hi Michael,

I did not buy Marantz AV8003/MM8003 as it was out of my budget at that time but AV7005/MM7055 seems to be reasonably priced.

Now I can find AV8003 combo for the price of AV7005 combo. I do understand that AV7005 offers more bell and whistles like HDMI 1.4, Audyssey XT, USB port but from the pure sound quality perspective is there any major difference between two as reading your AV8003 review was pretty good compared with this combo.


branon's picture

Do you think the MM7055 can drive 4 ohm speakers adequately. I am actually looking at the two channel version MM7025 and am bummed that they have avoided 4 ohm ratings. Specially since their integrated amps do have them (PM8004 and PM5004). I love the Marantz sound and looks but their failure to include 4 ohm ratings means that i might end up going with a similar priced Rotel.
I am going to use it to drive a pair of Vienna Acoustics Grand Bachs.

Bob Jones's picture


As usual, great review.

I am looking at purchasing an AV7005 and mating it to 2 Emotiva Amps (a XPA-2 (250 w/ch x 2) for the FR & FL and a XPA-5 (200 w / ch x 5) for the remaining 5 of 7 channels. I also plan to purchase an OPPO BD 93 or 95 (not sure which yet). My 2 ch music / multi-channel movies split is about 50% - 50%. So two questions:

1. Will I get noticable improvement for 2 ch music by purchasing the OPPO 95 and running 2 ch music direct and multi-channel via HDMI through the AV7005 or purchase the OPPO 93 and use HDMI for both 2 ch and multi-channel?

2. You mention that the Marantz MM7055 amp is a little underpowered. I realize the Emotivas are not in the same league as your Parasound HALO, but $4,500 is a little over my budget. What is your opinion on the Emotivas over the Marantz?

Thanks for your help.

Bob J.

Toronto, Canada

andre58's picture

Hi Bob, I am thinking of doing the same thing. Either the Marantz or Integra processor with the Emotiva XPA-2 and or XPA-5 and the Oppo - 95 player. I am getting the Legacy Audio Signature speakers and wanted to drive it with some good inexpensive amps.

Just wondering how you made out with the Emotiva's.

Did you look at the Emotiva UMC-1 processor?


Atlanta, GA

Foxxnet's picture

You must get thousands of emails. I hope you will answer my question. Its an easy one.

I have 7 Marantz MA500 monoblocks. Are they good enough to use with the new AV 7500 processor or do you recommend I update my amps?

Marcel Svizzero

Dov Lidor's picture

which one the MM8003 or the MM7005 is better?

DaleC's picture

My Panasonic TC-P50UT50 does not have the "advanced" video processing of the Panny ST's, and other high-end plasma displays. Am I better off using the processing in the av7005 or sticking with the Panny? Or does the basic Panny processing outperform the AV7005?


dmaz1's picture

Michael Fremer,
You wrote:
“The Rotel was a sweet-sounding, sonically accomplished piece that was and is easy to recommend. Since I don’t have it in house, I can’t offer a meaningful and reliable sonic comparison, but I’d say the Marantz and the Rotel are in the same high-echelon sonic league”
“I can hear each instrument separately, including some I never knew were there,” is how they usually put it”
“. It produced rich, warm, satisfying three-dimensional sound that was better than an afterthought from two speakers”
I compared the 2 channel performance of my Rotel RSP 1069 side by side to the Marantz AV7005. At first I was a bit confused – I thought I was doing something wrong. I went back to your review over and over and over again to make sure I did not miss-read or miss-understood anything. I checked all connections, wires, settings and repeated. I even tried playing the same tracks you did. But I just could not get that “rich, warm, satisfying 3 dimensional sound” you mentioned. The details and dynamics that the Rotel produced the Marantz just could not. I could not place the “Marantz AV7005 and the Rotel in the same high-echelon sonic league” – even though I really wanted to!
I am sure you have listened to Rotel units critically and over and over again and have a memory of how they sound. What I really find strange is that you are an audiophile and you could not sonically differentiate the Rotel from Marantz without the Rotel being right next to the Marantz in your house. Yes the Marantz AV 7005 is that far off from being in the high-echelon sonic league in which the Rotel resides in.
The 2 channel performance of the Marantz is good but nowhere near Rotel’s 2 channel performance. The highs are very high – after listening to 2 channel music for about 20 minutes my ears started to fatigue. For a minute I thought I will blow the tweeters off of my B&W 703s. Marantz just could not offer the mid-range detail, the depth and dynamics that Rotel did. Even the bass is a lot smoother and balanced from the Rotel.
Michael, what am I doing wrong here? After reading your review of the Marantz AV7005 I really really want to buy it and like it. In fact after reading your reviews of the Integras, Outlaw Audios, Onkyo processors etc.. – I want to buy them all! How are you getting these amazing results I just cannot get no matter what I do?
Oh one more thing. I also borrowed my friend's Rotel RSP 1570 and compared it to the AV7005. The RSP 1570 sounds exactly the same as my RSP-1069 in the 2 channel category.
B&W 703s
RSP-1069 / 1572
Sony ES Blu-Ray player.

ChrisandAlex1's picture

Hey Michael,
Thanks for the great review. I have just ordered both of these components and have been wavering on my decision. After reading this review, I feel much better.

My main concern was if I should have spent considerable more money to have an extraordinary setup. I use all Von Schweikert Speakers and I am just now upgrading to their new V-12 Subwoofer. I am hoping that the unique way that this sub works will make up for some of the low end power deficiencies of the amp.

I am also having Dave at Zenwave Audio making me a complete new set of cables and a modified SurgeX power conditioning unit. I really look forward to getting it all put together and enjoy.

Thanks again.