<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Apr 2, 2018, at 10:05 AM, Tim Ressel <<a href="mailto:timr@circuitabbey.com" class="">timr@circuitabbey.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Quick question: I need to output a signal from a Eurorack system to a guitar amp. Are there amps that have line level inputs? I seem to recall guitars with active electronics put out line level. True?<br class=""></div></div></blockquote><div><br class=""></div><div>Eurorack doesn't really standardize on audio levels, does it?</div><div><br class=""></div><div>Instrument amps use what is called "Instrument Level", which is for electric guitars, or basses, passive or active, electromagnetic or piezo pickups, electric pianos, organs, contact pickups, high impedance microphones, and so forth. Instrument Level is lower than line level, about 0.5V p-p, and very high impedance, about 1Mohm.</div><div><br class=""></div><div>Here, I'll 'scope my 'Strat: 200mVp-p for a single note, 400mV for a chord, 800mV if I slam it.</div><div><br class=""></div><div>It helps to know that most electric guitar amplifiers run the input signal directly into a 12AX7 grid with the cathode bypassed to ground. So you can think of it as 12AX7 level.</div><div><br class=""></div><div>I've never heard of a guitar amp with a line level input. There are a small number of amps with line level effects loops.</div><div><br class=""></div><div>Very, very few electric guitars have active electronics. Acoustic guitars with piezo pickups often have active electronics because the piezo is so high impedance and capacitive. Some basses have active electronics. Those all put out instrument level, to be compatible with guitar amps.</div><div><br class=""></div></div><div class=""><div style="color: rgb(0, 0, 0); font-family: Menlo; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"> -- Don<br class="">--<br class="">Donald Tillman, Palo Alto, California<br class=""><a href="http://www.till.com" class="">http://www.till.com</a></div>
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