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<blockquote data-quote="zako" data-source="post: 7898345" data-attributes="member: 629735">One opinion that I have frequently heard on forums is that older amplifiers used to increase their noise ratio when gains were increased. For that reason, the preference used to have high voltage pre-outs so that the gain can be set low on the amplifier. I have no idea if this argument still holds. Another argument I have heard is that some amplifiers do no have enough gain headroom to work with very low voltage inputs.For those interested in hooking the JBL MS-8 processor, it may be worth nothing that the unit supports only up to 2.7V inputs on the low-level inputs. If the voltage exceeds 2.7V, then the input signal is &quot;clipped&quot;. So, having high voltage pre-amp outs may be useless with this processor. In real life this is probably not a big deal. Having 4V pre-amp means that the pre-amp signal voltage is 4V when your volume level is at max setting playing a 0dB test tone. On a well recorded tracks, peaks rarely exceed -10dB, while a less carefully recorded pop track may have sound peaking at -5dB.</blockquote>

[QUOTE="zako, post: 7898345, member: 629735"] One opinion that I have frequently heard on forums is that older amplifiers used to increase their noise ratio when gains were increased. For that reason, the preference used to have high voltage pre-outs so that the gain can be set low on the amplifier. I have no idea if this argument still holds. Another argument I have heard is that some amplifiers do no have enough gain headroom to work with very low voltage inputs. For those interested in hooking the JBL MS-8 processor, it may be worth nothing that the unit supports only up to 2.7V inputs on the low-level inputs. If the voltage exceeds 2.7V, then the input signal is "clipped". So, having high voltage pre-amp outs may be useless with this processor. In real life this is probably not a big deal. Having 4V pre-amp means that the pre-amp signal voltage is 4V when your volume level is at max setting playing a 0dB test tone. On a well recorded tracks, peaks rarely exceed -10dB, while a less carefully recorded pop track may have sound peaking at -5dB. [/QUOTE]

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