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<blockquote data-quote="audioholic" data-source="post: 6967437" data-attributes="member: 549629">Your deck already has 5v preouts, a line driver wont make any significant improvement. A higher signal voltage does NOT increase output or amplifier efficiency, since you would merely have to adjust your gains down to accommodate the new higher signal voltage.So what does a higher signal voltage do you ask? It helps reject noise. Actually not reject it, mask it. Lets say you have noise being introduced into your signal chain somewhere (measured in volts). Your deck has a 2v signal, but you also have a line driver with an 8v signal. You&#039;ve now just increased from 2v signal to 8v, increasing the difference between the noise and the true signal by 6volts. That&#039;s all a higher signal voltage does, increase the gap between your signal level, and the noise floor. That&#039;s it, nothing else.So knowing this, do you have a noise problem? If you do, Id suggest attacking the problem directly, not trying to mask it with ever increasing signal strength, as your amp can only take so much. Furthermore, if you have a noise problem that can overcome a 5v signal, the noise problem is pretty severe, and should be fixed anyway. The point Im getting at is, for the vast majority of the time, someone using a 5v deck should never require a line driver.Ever wonder why line drivers use to be so much more popular than they are these days? because back then, decks were coming out with 1/2v siganls, not 5-8v like today&#039;s h/u&#039;s. The high signal strength of most decent decks today has rendered line drivers all but obsolete.I disagree, as I stated above.</blockquote>

[QUOTE="audioholic, post: 6967437, member: 549629"] Your deck already has 5v preouts, a line driver wont make any significant improvement. A higher signal voltage does NOT increase output or amplifier efficiency, since you would merely have to adjust your gains down to accommodate the new higher signal voltage. So what does a higher signal voltage do you ask? It helps reject noise. Actually not reject it, mask it. Lets say you have noise being introduced into your signal chain somewhere (measured in volts). Your deck has a 2v signal, but you also have a line driver with an 8v signal. You've now just increased from 2v signal to 8v, increasing the difference between the noise and the true signal by 6volts. That's all a higher signal voltage does, increase the gap between your signal level, and the noise floor. That's it, nothing else. So knowing this, do you have a noise problem? If you do, Id suggest attacking the problem directly, not trying to mask it with ever increasing signal strength, as your amp can only take so much. Furthermore, if you have a noise problem that can overcome a 5v signal, the noise problem is pretty severe, and should be fixed anyway. The point Im getting at is, for the vast majority of the time, someone using a 5v deck should never require a line driver. Ever wonder why line drivers use to be so much more popular than they are these days? because back then, decks were coming out with 1/2v siganls, not 5-8v like today's h/u's. The high signal strength of most decent decks today has rendered line drivers all but obsolete. I disagree, as I stated above. [/QUOTE]

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