+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 10 of 28

Thread: Monoblocks?

  1. #1
    Join Date: Jan 2020

    Location: Sheffield

    Posts: 13
    I'm Evie.

    Default Monoblocks?

    Hi

    If a Monoblock is exactly the same specification as a stereo power amplifier i.e.100WPC, other than being able to put the amp next to the speaker, what are the advantages?

    If the audio power output is current limited, than how does a non-shared power supply benefit a monoblock if the total power draw is limited?

    Any enlightenment is greatly appreciated.
    LKB

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,423
    I'm Alan.

    Default

    Why would the total power draw be limited?
    The output from any amplifier is limited by its internal supply voltage, plus the 'stiffness' of its supply.

    It doesn't really matter if the monoblock or stereo amplifier are rated the same per channel, the supply sag when one stereo channel is driven is always going to affect the other stereo channel.
    The quality of the amplifier circuit design doesn't seem to mitigate against this happening. I have recently converted both Neurochrome Modulus 86 and 286 amplifiers to true dual mono, with independent power supplies and have experienced much wider stereo imaging as a result.

  3. #3
    Join Date: Apr 2012

    Location: London

    Posts: 643
    I'm James.

    Default

    Intrigued Alan, as I am about to embark on a similar path but with preamps. Did you find that the separation was better than with a simple shared supply, or a shared supply with separate reservoir caps and resistors, or irrespective?

    Sent from my BLA-L09 using Tapatalk

  4. #4
    Join Date: Sep 2013

    Location: North Island New Zealand

    Posts: 1,687
    I'm Chris.

    Default

    I concur there are always sound quality improvements where mono block construction is used.
    My own system uses 2 x Quad 306 where i use just one channel of each amp for each speaker.

    Yes any separation of channels, or indeed separation of individual sections that see dedicated
    circuitry related to the actual task is always worthwhile.

    As for output power being current limited, Yes there is advantage in amplifiers being current driven rather than voltage driven.
    Correctly rather than series resistance toward the loudspeaker, as a current source representing the audio output, a current driven
    amplifier would have method of sensing the load, based on the requirements of the loudspeaker
    https://www.stereo.net.au/forums/top...omment-4416252

  5. #5
    Join Date: Jan 2019

    Location: Liverpool

    Posts: 124
    I'm Andrew.

    Default

    The advantages of Monobloc Amplifiers is in the main that they suffer from zero cross talk as they are fully seperated and independant . Other advantages are that one amplifier is not affected when the other has a draw on its power supply as explained in the above threads.

    There is also the advantage that monoblocs can be placed very close to your speakers and connected by short speaker cables (provided you have a pre amp that can drive long phono leads) . The best cable is no cable but if it has to be there then the shortest speaker cable is the best solution (it also makes the cost of cable lower) .

    I also think that all the monobloc amps I have heard have an element of control to the sound which may weel be due to the tighter grip they have on the speaker as they only have to deal with one speaker rather than two . After that I must admit I am at a loss for further advantages .

  6. #6
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 67,984
    I'm Grant.

    Default

    I use amps that are mono-ed too. Mine have added advantage of a vc on each which allows me to adjust output for off centre listening as well as the other stuff mentioned
    Regards,
    Grant .... ؠ

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D - JBE SERIES 3/B&O SP1/PROJECT PHONOBOX DS2 USB - QUAD VENA 2 - IFI PURIFIER 2/TWIN PRO MONOBLOCK POWER AMPLIFIERS - LEAF HD BLUETOOTH - OPPO PM-3 PLANAR, SONY H900 & NURAPHONE HEADPHONES - ZBOOK/ IFI SILENCER/WIN10 PRO/ROON - SMSL M6 DAC & IFI SILENCER - RPI 3+, DIGIONE HAT/VOLUMIO2 - EDINGDALE MK1 SPEAKERS - CABLE INC CHORD, MOGAMI, SUPRA & WIREWORLD

    **Men are not punished for their sins, but by them**Don't be such a big girl's blouse!**
    ***SMILE, BE HAPPY***

    RIP Terry... "We use only the finest baby frogs, dew picked and flown from Iraq, cleansed in finest quality spring water, lightly killed, and then sealed in a succulent Swiss quintuple smooth treble cream milk chocolate envelope and lovingly frosted with glucose."

  7. #7
    Join Date: Apr 2008

    Location: Warrington

    Posts: 3,440
    I'm Neil.

    Default

    I have a "dual mono" amp. That is, two completely independent amps in one box. Would it sound different if I put a channel into another box? I doubt it...

    More important is the power supply itself, rather than the box(es).

    Another observation is that monoblocks tend to be at the higher end of a range, and are more likely to have bigger power supplies vs. stereo equivalents.
    Mana Acoustics Racks / Bright Star IsoNodes Decoupling >> Allo DigiOne Player >> Pedja Rogic's Audial Model S DAC + Pioneer PL-71 turntable / Vista Audio phono-1 mk II / Denon PCL-5 headshell / Reson Reca >> LFD DLS >> LFD PA2M (SE) >> Royd RR3s.

  8. #8
    Join Date: Jan 2008

    Location: Norwich

    Posts: 1,050
    I'm Mike.

    Default

    I've had monobloc amps for too long to cast an opinion. My only vaguely comparable 'test' was when a friend brought round his 899 E.A.R. amp and we alternated between my E.A.R. 509s into big Quad ESLs and with E.A.R. pre-amplification. Very very similar, but more control and 'rightness' was detected by all with the mono's, and maybe a wider soundstage/imaging etc.

    On another note (!) since I read somewhere that these audio items should be called 'monoblocs' rather than 'monoblocks' (and it gave a reason which currently escapes me), I've omitted the 'k'. I noticed above that BENCAT has done likewise, and it's rare to come across this.

    Anybody know what and why the correct terminology is? Pedantry, maybe, but surely there can only be one spelling.

  9. #9
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 67,984
    I'm Grant.

    Default

    both mean the same... think the french use the c
    Regards,
    Grant .... ؠ

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D - JBE SERIES 3/B&O SP1/PROJECT PHONOBOX DS2 USB - QUAD VENA 2 - IFI PURIFIER 2/TWIN PRO MONOBLOCK POWER AMPLIFIERS - LEAF HD BLUETOOTH - OPPO PM-3 PLANAR, SONY H900 & NURAPHONE HEADPHONES - ZBOOK/ IFI SILENCER/WIN10 PRO/ROON - SMSL M6 DAC & IFI SILENCER - RPI 3+, DIGIONE HAT/VOLUMIO2 - EDINGDALE MK1 SPEAKERS - CABLE INC CHORD, MOGAMI, SUPRA & WIREWORLD

    **Men are not punished for their sins, but by them**Don't be such a big girl's blouse!**
    ***SMILE, BE HAPPY***

    RIP Terry... "We use only the finest baby frogs, dew picked and flown from Iraq, cleansed in finest quality spring water, lightly killed, and then sealed in a succulent Swiss quintuple smooth treble cream milk chocolate envelope and lovingly frosted with glucose."

  10. #10
    Join Date: Feb 2008

    Location: South Wales

    Posts: 7,928
    I'm NotTakingLifeTooSeriouslyTheseDays.

    Default

    Quote Originally Posted by Mike Reed View Post
    I've had monobloc amps for too long to cast an opinion. My only vaguely comparable 'test' was when a friend brought round his 899 E.A.R. amp and we alternated between my E.A.R. 509s into big Quad ESLs and with E.A.R. pre-amplification. Very very similar, but more control and 'rightness' was detected by all with the mono's, and maybe a wider soundstage/imaging etc.
    "Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
    Nikola Tesla


    When wireless is perfectly applied the whole earth will be converted into a huge brain, which in fact it is, all things being particles of a real and rhythmic whole... and the instruments through which we shall be able to do this will be amazingly simple compared with our present telephone. A man will be able to carry one in his vest pocket. Nikola Tesla, 1926
    We Send our kids to school to be Educated, not Medicated!

+ Reply to Thread
Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •