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Which unit should i get?
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<blockquote data-quote="JLCivic" data-source="post: 233642" data-attributes="member: 547424"><p>I just found it again(when i linked to it, i had to put in my username and pword, but then it just took you to the general forum. Here is the initial post:</p><p></p><p>kepone</p><p></p><p>Senior Member</p><p></p><p>Registered: Jan 2000</p><p></p><p>Posts: 645</p><p></p><p>ok, i broke out my oscilloscope today and took some readings on this deck.. this should sort out all the controversy about the weak pre outs on this unit..</p><p></p><p>i used 100hz and 1khz test tones, and a steady 14.4 volt power supply ( i modified a antec PC 450 watt power supply ), the oscilloscope is a tectronics 211.</p><p></p><p>first off, the front/rear pre outs.. these performed very well.. max volume on this unit is "35".. the front/rear pre outs do not clip at all until "32".. so you get the max performance at 31.. the voltage at 31 was a steady 3.9 volts RMS.. which is quite nice, considering that the unit is rated at 4v rms, however at 32 the clipping is quite dramatic, so dont ever turn it to that, 31 is the absolute max. these results were EXACTLY the same with either test tone, which i found to be strange, but my room-mate who is an electrical engineer said that is to be expected.</p><p></p><p>now, the sub pre out.. the trouble maker..</p><p></p><p>good news: the sub pre out doesnt clip at all, ever.</p><p></p><p>bad news, at volume level 35 ( max volume ) its only putting out 3.5v rms, which isnt THAT bad if you think about it.. but, and this is a big *but*, since the front/rear clips at 32, you cant run the sub pre out at any level higher than 31.. and at that level its putting out a meager, mere, pathetic 1.7v RMS...</p><p></p><p>so there you have it, this is the second 7897 i have had, and both have had the same problem.. id like to get my hands on some other decks to test..</p><p></p><p>so there you have it.. the real deal</p><p></p><p>_____________________________-</p></blockquote><p></p>
[QUOTE="JLCivic, post: 233642, member: 547424"] I just found it again(when i linked to it, i had to put in my username and pword, but then it just took you to the general forum. Here is the initial post: kepone Senior Member Registered: Jan 2000 Posts: 645 ok, i broke out my oscilloscope today and took some readings on this deck.. this should sort out all the controversy about the weak pre outs on this unit.. i used 100hz and 1khz test tones, and a steady 14.4 volt power supply ( i modified a antec PC 450 watt power supply ), the oscilloscope is a tectronics 211. first off, the front/rear pre outs.. these performed very well.. max volume on this unit is "35".. the front/rear pre outs do not clip at all until "32".. so you get the max performance at 31.. the voltage at 31 was a steady 3.9 volts RMS.. which is quite nice, considering that the unit is rated at 4v rms, however at 32 the clipping is quite dramatic, so dont ever turn it to that, 31 is the absolute max. these results were EXACTLY the same with either test tone, which i found to be strange, but my room-mate who is an electrical engineer said that is to be expected. now, the sub pre out.. the trouble maker.. good news: the sub pre out doesnt clip at all, ever. bad news, at volume level 35 ( max volume ) its only putting out 3.5v rms, which isnt THAT bad if you think about it.. but, and this is a big *but*, since the front/rear clips at 32, you cant run the sub pre out at any level higher than 31.. and at that level its putting out a meager, mere, pathetic 1.7v RMS... so there you have it, this is the second 7897 i have had, and both have had the same problem.. id like to get my hands on some other decks to test.. so there you have it.. the real deal _____________________________- [/QUOTE]
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