Anthem STR Stereo Integrated Amplifier Preview

Discussion in 'Amps, AV Pre-Pros & Receivers' started by gene, Sep 30, 2016.

  1. gene Audioholics Master Chief Administrator

    gene
    Joined:
    Jul 1, 2002
    Messages:
    8,234
    Likes Received:
    3,597
    Location:
    Florida
    Anthem is strengthening its presence in the two-channel audio space with the introduction of the STR Integrated Amplifier which they unveiled at the CEDIA 2016 Expo show. Built with high end components, a MC and MM phono preamp and high resolution 32-bit/384 kHz DAC, the STR is ready to meet your audiophile needs. Able to pump 600 watts into 2 ohm loads, it can also easily power the most demanding loudspeakers as well.

    Looking to get your two-channel fix? Try Anthem!

    [​IMG]

    Read: Anthem STR Stereo Integrated Amplifier Preview
    gene,
    • Like Like x 1
  2. shadyJ Audioholic Spartan

    shadyJ
    Joined:
    Oct 16, 2006
    Messages:
    5,634
    Likes Received:
    1,646
    A integrated amp with bass management?! Hell hath frozen over! Nice beefy amp too, and 2 ohm stable, very nice. I get this is for two channel music, but one nice inclusion at this price point would be HDMI connectivity, for those of us who use our PCs as music servers, or who use their blu-ray players to listen to music. Or maybe those who also just want to watch some TV on their two channel system.
  3. Alexandre Audioholic

    Alexandre
    Joined:
    Jun 2, 2015
    Messages:
    175
    Likes Received:
    15
    Location:
    San Francisco, CA
    I wholeheartedly agree, a nice 2.1 or 2.2 with HDMI inputs would be great!
  4. j_garcia Audioholic Jedi

    j_garcia
    Joined:
    Jul 11, 2005
    Messages:
    27,438
    Likes Received:
    6,014
    Room correction and management for TWO subs in mono OR stereo? Nice.

    Then sees price tag and understands :p
    • Funny Funny x 1
  5. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    Looking at the size of the power supply, I would be very skeptical of the 550 WPC 2 ohm rating, without knowing their definition of "continuous" that they put in () in small fonts. My MCA power amp has similar specs, I know what it can do..
    PENG,
  6. Verdinut Senior Audioholic

    Verdinut
    Joined:
    Aug 31, 2016
    Messages:
    608
    Likes Received:
    95
    Maybe they meant "Simultaneous" which is is not necessarily continuous!:D
  7. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    They probably meant instantaneous peak, or dynamic output (for very short duration) like NAD's.
    PENG,
    • Agree Agree x 1
  8. highfigh Audioholic Warlord

    highfigh
    Joined:
    Sep 14, 2008
    Messages:
    8,790
    Likes Received:
    1,992
    Location:
    Milwaukee area
    What would HDMI contribute that optical/SPDIF wouldn't in a 2 channel system? I mean, other than problems.
  9. KEW Audioholic Spartan

    KEW
    Joined:
    Jul 12, 2009
    Messages:
    6,645
    Likes Received:
    2,295
    Location:
    Jowjah
    OSD!:p
    KEW,
  10. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    That would be like the new Denon AVC-X8500H (non NA model), except just 2 channels, Oh, only if it adds video to the HDMI too.:D
    PENG,
  11. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    According the the data sheet info (copied/pasted below):

    https://www.anthemav.com/downloads/str_integrated_amplifier_datasheet.pdf

    Amplifier uses 8 bipolar output devices per channel, a toroidal transformer power supply, and Advanced Load Monitoring for 200W at 8 ohms, 400W at 4 ohms, 550W at 2 ohms, all continuous

    Output (per channel, continuous, 20 Hz - 20 kHz, <1% THD) . . . . . . . . . . . . . . . 200 W (8Ω), 400 W (4Ω), 550 W (2Ω)

    Impressive, double down into 4 ohm and 2 ohm stable, and continuous?

    Then look at the "Power Consumption" section:

    Idle . . . . . . . . . . . . . . . . . . . 40 W
    Typical Use . . . . . . . . . . . . . 250 W
    High Output . . . . . . . . . . . . 500 W

    and the fact that:

    1. The enclosure looks to be made of steel, definitely not plastic, may be some AL?
    2. No fans at all.
    3. Including the build in preamp and DAC, weight: 40 lbs soak and wet.
    4. Class AB amp's efficiency typically<<100%

    You can see why I have serious doubt about their power output into 2 ohms specs, I hope..

    My estimate of the VA rating of the transformer is purely based on visual, it appears to be very similar in physical size to that of the Halo A23 that has an exceptionally large transformer for a 125 WPC. That amp is fitted with a 850 VA transformer, website claimed 1kVA that was an error (I have confirmation). I have 3 power amps that have transformers rated 1,200 VA and much more storage capacitance than the STR; and none claimed 550 W into 2 ohms continuous, in dynamic rating yes, but not continuous.

    https://www.google.ca/search?q=halo...AhUmwYMKHcRFB1AQ9QEIKTAA#imgrc=JQpYDc7Zf1rNhM:

    To be fair, aside from the power output rating that I don't believe (unless it was for one channel driven), the STR does have very impressive THD, IMD, SNR, slew rate, and decent DF. Among integrated amps, I would think the STR would rank among the top in terms of specs that count, just wish it has a larger transformer and more capacitance, not necessarily for SQ as such, but for bragging right. I won't pay C$5,500 for it, but if I am in the market for an integrated amp, I wouldn't mind getting it for a deep discount.:D
    Last edited: Jan 13, 2018 at 2:46 PM
    PENG,
    • Like Like x 1
  12. Johnny2Bad Senior Audioholic

    Johnny2Bad
    Joined:
    Jan 16, 2010
    Messages:
    524
    Likes Received:
    122
    Anthem normally rates their power sections (including multichannel AV amps) using the FTC method (x watts per channel, all channels driven, from 20~20KHz, into x impedance, at x THD). Also manufacturers are prohibited from specifying power into an impedance that causes protection to engage or fuses to blow during UL/CSA compliance testing, so it must be able to drive a 2 ohm load.

    However I do agree that we would need more information beyond a press release, so time will tell.

    "Continuous Power" is equivalent to "RMS Power"; they mean the same thing.
    Last edited: Jan 14, 2018 at 5:58 AM
  13. Andrein Full Audioholic

    Andrein
    Joined:
    Nov 19, 2016
    Messages:
    272
    Likes Received:
    16
    Wondering how much str is different from their MCA series.

    Power Output
    Continuous 20 Hz to 20 kHz, <1% THD (all models)
    Power Requirement
    THD at 100 W
    at 1 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.0010%
    at 20 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.015%
    IMD at 100 W
    ITU-R (19 kHz + 20 kHz). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.0005%
    SMPTE (60 Hz + 7 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.002%
    SNR, IEC-A, ref. 225 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120 dB
    Frequency Response, 20 Hz to 20 kHz
    open circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .± 0.1 dB
    8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .± 0.1 dB
    4 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .± 0.1 dB
    2 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .± 0.2 dB
    Power Bandwidth, -3 dB at 200 W into 8 ohms . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 kHz
    Slew Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 V/μs
    Damping Factor, 20 Hz to 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300
    Channel Separation, 100 Hz to 10 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>65 dB
    Input Impedance
    RCA / XLR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 kΩ / 15 kΩ
    Input Sensitivity, 225 W into 8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5 Vrms
    Voltage Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 dB
    This product operates from a single phase AC power source that supplies
    108V – 132V at a frequency of 60 Hz for the 120V version and 198V – 264V
    at a frequency of 50/60 Hz for the 220V – 240V version.
    Dimensions (all models)
    Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5/8” (16.9 cm)
    Rackmounted Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4U
    Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-1/4” (43.8 cm)
    Depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-1/8” (46 cm)
    Weight (unpacked)
    MCA 525 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 lb (27.5 kg)
    MCA 325 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 lb (19.5 kg)
    MCA 225 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 lb (18 kg)
  14. Andrein Full Audioholic

    Andrein
    Joined:
    Nov 19, 2016
    Messages:
    272
    Likes Received:
    16
    load
    8 ohms
    4 ohms
    2 ohms
    watts
    225 W
    400 W
    600 W

  15. Johnny2Bad Senior Audioholic

    Johnny2Bad
    Joined:
    Jan 16, 2010
    Messages:
    524
    Likes Received:
    122
    61 pounds. Obviously that's not an audio performance spec, but that doesn't sound like a component with a weak power supply to me.
  16. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    That's for the mca525, a 5x225w power amp, not bad at all but the 600w into 2 ohm is likely a "dynamic" output rating.
    PENG,
  17. Andrein Full Audioholic

    Andrein
    Joined:
    Nov 19, 2016
    Messages:
    272
    Likes Received:
    16
    Looking at their spec. They say 600 is continuous, 20hz-20khz, thd < 1%, all models incl 225.
  18. PENG Audioholic Overlord

    PENG
    Joined:
    Oct 23, 2004
    Messages:
    10,215
    Likes Received:
    2,764
    Location:
    Ontario
    I know, that's why I called them out on this. Either they had a typo, or....well, really don't want to say, use your imagination..

    Actually, if you read the data sheet it does not say how many channel, but under the tab "specs" (click on it), it does say:

    POWER OUTPUT (PER CHANNEL)
    (Continuous RMS, 20 Hz - 20 kHz, <1% THD)

    So if they meant 600 W, one channel driven into 2 ohm, then it could be, still they should define "continuous", if they meant it literally, then it is still highly questionable. It is all academic though, most people plug their amp into a 15A or 20A circuit and don't push any more than a few watt average with much higher peaks depending on the music but still low enough for most mid range AVR, let alone a 225W Anthem amp.
    Last edited: Jan 16, 2018 at 3:06 PM
    PENG,
  19. Andrein Full Audioholic

    Andrein
    Joined:
    Nov 19, 2016
    Messages:
    272
    Likes Received:
    16
    Was looking at their printed doc that comes with my amp. No one channel statement. Same in pdf you can download from thei site.
  20. Andrein Full Audioholic

    Andrein
    Joined:
    Nov 19, 2016
    Messages:
    272
    Likes Received:
    16
    Just trying to understand what really the diff between mca and str is. It looks they sacrificed something for the dac and increased the price by 50 per cent. Maybe something improved. Did not compare spec line by line. But i think if you have a dac already, mca 225 is a better choise.
    • Agree Agree x 1

Share This Page

  • RBHsound.com
  • BlueJeansCable.com
  • SVS Sound Subwoofers
  • Experience the Martin Logan Montis
  • CEDIA