boynigel Posted Monday at 02:58 PM Share Posted Monday at 02:58 PM I'm using my LT solely for effects and controlling my amp via 4CM. Is this one of those "just use your ears" settings, or is one more ideal as far as selecting Line or Instrument for the Send/Return jacks. Manual doesn't really say (specific to 4CM), so i'm inclined to stick with Instrument level setting unless there's some good reason to switch to Line that i'm unaware of. Quote Link to comment Share on other sites More sharing options...
rd2rk Posted Monday at 03:06 PM Share Posted Monday at 03:06 PM The manual for your XYZ amp specifies that the FX Loop is PQR level. MOST modern amps' FX Loops are made for use with stompboxes/consumer grade devices. If the PQR level is -10db then that's what you've got. SOME amps' FX Loops were once upon a time made for studio/rack FX. If the PQR level is +4db, there ya go. If the amp has a -10db/+4db switch then set it appropriately for your gear. Quote Link to comment Share on other sites More sharing options...
boynigel Posted Monday at 04:26 PM Author Share Posted Monday at 04:26 PM On 10/13/2025 at 11:06 AM, rd2rk said: The manual for your XYZ amp specifies that the FX Loop is PQR level. MOST modern amps' FX Loops are made for use with stompboxes/consumer grade devices. If the PQR level is -10db then that's what you've got. SOME amps' FX Loops were once upon a time made for studio/rack FX. If the PQR level is +4db, there ya go. If the amp has a -10db/+4db switch then set it appropriately for your gear. My amp's a Suhr PT15IR, so i'm going to assume its spec'd for pedals. it doesn't specify in the PT's manual, it only says, "tube-driven, buffered" 1 Quote Link to comment Share on other sites More sharing options...
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