bluedog Posted October 23, 2010 Posted October 23, 2010 Hi guys just musing here but i just noticed that the frequency response of my amp is rated at 20Hz to 20kHz, ±0.25dB. My question then is is there no point in having a speaker that can go from 17hz to 25 khz ? as it will only play the 20 to 20 ? i notice the pending pre has a response of 1.2Hz-81kHz so is the amp going to be a choke as such ?:rolleyes: i see that the 350 perreaux goes from 20 to 25 khz and the EAR 890 4Hz-46kHz. On that you would think the EAR should kick the perreaux.Am i missing something
Shane Hanify Posted October 23, 2010 Posted October 23, 2010 Gidday BD, I wouldn't worry about it too much. Your speakers may be flat to both 17Hz and 25k but is your hearing? Also, are all your sources high bandwidth? I've listened to full bandwidth amps (10 to 200) and they make a difference, especially in the lower end, but nothing that a good solid 20 to 20 design couldn't see off unless all your source material was high res. Cheers, Shane.
Omegaspeedy Posted October 23, 2010 Posted October 23, 2010 There will still be output above and below those given values but maybe not flat as guaranteed between 20-20000. Speaker wise, i'd say it's still well worth having speakers with a response outside those values even if they are not flat either. It will just add more to the whole experience.
bluedog Posted October 24, 2010 Author Posted October 24, 2010 so the amp can still produce say a 23khz signal just no on a flat line then
Omegaspeedy Posted October 24, 2010 Posted October 24, 2010 bluedog;136482 wrote: so the amp can still produce say a 23khz signal just no on a flat line then Yes that's right:) and maybe well beyond 23Khz
Shane Hanify Posted October 24, 2010 Posted October 24, 2010 Leave the second harmonics out of it Cheers, Shane.
Electra Posted October 24, 2010 Posted October 24, 2010 BD, dont fret those specs, the perreaux can go far lower, and far higher, than your speakers will be capable of. Maybe not at +- .25dB, but probably not that far off it either. I dont know if that particular model of Perreaux is DC coupled, but mine all are, and they will happily output DC if you put it into them. They also happily put out a clean 50Khz signal if you feed one into them. I have not measured the true limits, not the linearity of them, but they do all that you will ever need in regard to frequency response.
bluedog Posted October 24, 2010 Author Posted October 24, 2010 too_tall;136494 wrote: BD, dont fret those specs, the perreaux can go far lower, and far higher, than your speakers will be capable of. Maybe not at +- .25dB, but probably not that far off it either. I dont know if that particular model of Perreaux is DC coupled, but mine all are, and they will happily output DC if you put it into them. They also happily put out a clean 50Khz signal if you feed one into them. I have not measured the true limits, not the linearity of them, but they do all that you will ever need in regard to frequency response. Thanks guys thats all i needed to hear i must say though if you dont know to much the spec's can be miss leading and after all when you start looking for gear it is a start point ?
Guest Posted October 24, 2010 Posted October 24, 2010 Best thing about amp specs is to forget about them.
pasdesignal Posted October 24, 2010 Posted October 24, 2010 michael w;136503 wrote: Best thing about amp specs is to forget about them. I second that motion.
Omegaspeedy Posted October 24, 2010 Posted October 24, 2010 pasdesignal;136504 wrote: I second that motion. And a third here:) it's just not worth worrying about.
bluedog Posted October 24, 2010 Author Posted October 24, 2010 Yea but in a perfect world one would be able to listen to 100 or so amps but as we all know that is almost impossable these days so one needs to look at the spec's to weed out a few ? but i am very guilty of looking two deaply into things as my wife is always saying.
Guest Posted October 24, 2010 Posted October 24, 2010 Nope. Take two amps; One has FR of 1-100khz The other 30-15khz Which one do you think sounded better ?
Omegaspeedy Posted October 24, 2010 Posted October 24, 2010 bluedog;136507 wrote: Yea but in a perfect world one would be able to listen to 100 or so amps but as we all know that is almost impossable these days so one needs to look at the spec's to weed out a few ? but i am very guilty of looking two deaply into things as my wife is always saying. Bluedog, the only specs that matter is the output. Will they will drive your speakers to your satisfaction (ie driving B&W 800D's with a 6watt set amp might not be sensible). All other aspects come down to personal taste. Does it sound right to you after X time to get to know it? Neil tried to sell me a 30watt Sugden once and it drove my Dyn S1.4's beautifully. I talked myself out of buying it being overly worried about power. I should have bought it as it had plenty of drive. I now have a 35watt A/B amp running my medium efficient speakers with success. Go for sound and musical satisfaction and will it drive you speakers to the dBl level when asked without becoming offensive? X time = enough time to go through you Favorite vinyl collection.
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