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THX POWER AMPS

Discussion in 'AV Pre-Amp/Processors & Power Amps' started by Jas, Sep 7, 2001.

  1. Jas

    Jas
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    I am slowly building up a thx system but details seem sketchy re specs of thx power amps and i am questioning whether or not thx seem to promote specs on av pre amps and speaker systems more, and that the power amp specs are not as fussy.<br />For instance many high end companies like tag & meridian have well specified power amps some times so much so to the point of being over engineered but have no thx badges / licence.<br />So is it really worth spending extra £££ on a licenced product when the likes of the above make perfectly good amps. Most specs re thx power amps seem to concentrate on power output/impeadence loads. Surely thats not the only requirement. It seems strange to sell thx pre amps like tag av32r or 568 meridian and not sell thx power amps along side the processors.<br />Perhaps companies like the above dont need the cost or reassurance, they know they make excellent amps that exceed thx specs anyway.

    What does everyone think

    Regards Jason. <img src="eek.gif" border="0">
     
  2. Reiner

    Reiner
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    Uh, sensitive subject. Personally I do not promote THX as like you say others can make equally good or even better amps than THX amps.<br />Guess they just don't bother to license it as they would need to pay a fee for that.<br />Then again the THX badge will give you an insurance for a quality product fullfilling the quite strict specifications.

    As for speakers be aware that THX certified speakers do not necessarily perform that well with music - just in case you intend to run a mixed setup - and there might be exceptions to the rule, as usual.

    Don't forget to by THX certified cables of you decide for it ... <img src="biggrin.gif" border="0">
     
  3. nfordenfield

    nfordenfield
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    Personally, I prefer to be my own judge, afterall, it's my money. If you want total control, best use a more powerful amp that the rated RMS of your speakers, but never get drunk and show your system off to your mates, it could be expensive. Again as mentioned above, THX is just for movie soundtracks, if you want that and Stereo/DVD Audio, look else where. Best to go for a bridgeable quality amp, so you can use it in expanding system as your budget grows.

    I've tried Tag, Rotel, Arcam etc and finally settled for a pair of Meridian 557's bridged for left and right, using my Denon AVC A1SE for the centre and surround and surround backs.

    Money no object, you would be using Krells or better, so depends on your budget.

    Good Luck

    Nathan
     
  4. Lowrider

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    My very modest opinion, assuming that you are going to listen also to music, is to get THX processor only, there I think you may have gains for movie soundtracks, without spoiling the music reproduction, I have the TAG AV32R.<br />The amps, mine are THX Rotels, but only by chance, I am sure the TAG and others are better without beeing THX.<br />As for the speakers, I believe THX are not ideal for music, too many drivers and only go down to 80hz, I think the subwoofer should work lower than that, at least for music. But it would be nice to have musical speakers with their dynamic range...
     
  5. Guest

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    I have a slightly different take on THX (of which i personally like) in so much as regard it perhaps as offering a minimum standard (good) rather than percieving it to claim "unbeatable standards".<br />There are multiple transformer designs that are THX compliant (i.e Rotel 1095 which as two 1.5kva transformers - hefty by anyones standard) a THX ultra standard requires that high/low level signal stuff be supplied by independant transformers, there are no limits, however on how many may be used for the output stages.<br />I too have heard Nad, Marantz and Rotel THX power amps (of which i use several) and have absolutely no qualms about recommending them to anyone. They do exactly what it says on the tin (if used for HC). I think that a THX stamp on a power amp is A GOOD thing if like me you are "mid-range" obviousl if you have more financial clout then sure, there are designs about that will relatively speaking "out-perform" THX designs but this is down to component quality rather than any limitations of THX certifiied power amps.<br />(crudely put) for power amps the THX badge simply guarantees a sustained output across all channels simultaneously with a guaranteed minimum peak output current ability, S/N ratios etc etc.<br />Pay more and you'll get better (pretty much as it always is)
     
  6. Nic Rhodes

    Nic Rhodes
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    Don't get hung up on THX certified amps. Processors and speaker yes it does help. THX amp spec actually limit quality to some extent

    re

    THX spec says a single transformer per amp chassis.

    For mono blocks like the little Marantz that is one per chanel. If it is a five channel amp in order to get THX certification it needs one large transformer. Tag and other argue that individual transformers are better (correctly). They use one per channel (like the Marantz) but put it all in one case! They are not eligible! Bonkers.

    It cost lots of money to get THX certification so Tag argues it is not worth it. I agree with them.
     

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