HRDx FX Loop - Instrument or Line Level?

[drod2045]

Ive searched the manual, the website, the amp, and the unofficial manual online - I cant find this out anywhere. Does anyone know and is there anyway to tell on my own?

Thanks

[phsyconoodler]

Effects are designed to be at line level,so it is likely the HRD loop is set up for line level.You can plug a cable into one of the jacks and measure the voltage in AC volts.It should be near one volt AC.

[drod2045]

someone in the other amp forum said they think its instrument level. anyone know which is mroe typical in an amp's fx loop?

[donnyjaguar]

Drod, did you listen to a word psychonoodler just said?

[drod2045]

way to show off your entitlement. I do (not) appreciate it at all. Thanks.

the internet, and this board, is full of people who know, dont know, and are somewhere in between. The person in the other amp forum said he was almost certain it was instrument level - since has has a deville which is very close to the deluxe. pysch says he doesnt know but would assume its line level. Either way - no one is certain so they both fall into the inbetween category and Im in the "dont know at all" category.

Here is the schematic of the preamp (http://studentweb.eku.edu/justin_holton/images/HRDxpreamp.gif)

Here is the schematic of the whole amp (http://studentweb.eku.edu/justin_holton/images/HRDxschem.gif)

No clue if that helps but this is the technical forum so Im giving it a shot

[phsyconoodler]

I guess it would depend on what you want to do with the loop.If it's generic effects,then plug away.If it's something exotic,you need to know for sure.
Again,effects loops are for line level gear as far as I know.
Why do you need to know?

[drod2045]

Just got a Line 6 DL4 and it was mentioned in the pedal forum that this particular pedal can be fried when run in the amps loop if it is a line level loop. They said it will run better in front if that is the case - an instrument level loop works best. I just dont want to fry my pedal.

Prior to the DL4, I was using a T Rex Reptile. it has an overload/clip light indicator for its input signal. When I first used it, the light was not on much at all. It says to set the pedal so that the level of overload is minimal. After a while, i noticed that the light was almost always on. However, the sound I got out was never harsh or clipped.

As of recently, Ive been having some issues with my amp and Ive narrowed it to the preamp section. I am getting a v1 rattle. I believe the tube is rattling so I bought some o rings to try and alleviate this issue. However, Ive been wondering if the problem is more deeply seated than just a rattling - perhaps something on the PCB board itself.

When i plug into the power amp in directly, I get the same signal as if I plug straight into input 1 or 2. Also, I get the same signal using my board with or without the effects loop being plugged into.

Im installing a new speaker (perhaps theres some speaker issue - but i intended to replace the stock one anyway), tightening all screws and putting on the o rings and going to do as much as possible to try alleviate this issue. But essentially - in the end - I just dont want to fry my DL4 or other delay pedals by sending a signal too hot into them.

Thanks dude. I probably should have said all that from the start

[donnyjaguar]

No one is certain? The signal levels are written right on the schematic. See that 66mV written on TP15? See the notes written on the schematic WRT knob & switch settings? Hint: 66mV = 0.066Vrms < 1Vrms (line level). It sounds a lot like instrument level to me.

[JJman]

I had an amp that had an adjustable loop for either. Considering that most all effects can (and might require) an instrument (level) be plugged into it, I would expect that most effects loops accommodate closer to instrument level. This lower level will probably work with 95% of the effects "boxes" out there whereas I would think many units won't like a line level. Too hot.

[drod2045]

No one is certain? The signal levels are written right on the schematic. See that 66mV written on TP15? See the notes written on the schematic WRT knob & switch settings? Hint: 66mV = 0.066Vrms < 1Vrms (line level). It sounds a lot like instrument level to me.


Honestly, thanks for looking at the schematic because when it comes to amps/guts/schematics - i truly dont know my foot from a soldering iron. That helps me out greatly. :band

[donnyjaguar]

My apologies for being so brusque. Too much caffeine methinks! :)

[guitargod0dmw]

*Most* FX loops are meant to have rack gear in them. Rack gear is generally line level equipment...so most of the loops that I know of are LL.

*Most* pedals are instrument level, and that is why they generally work better out front...

There are certainly exceptions.