FX loop wierdness

hywelg
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Re: FX loop wierdness

« Reply #15 on: August 20, 2008, 05:49:59 PM »

TRS are commonly used in PA connections as mono with the two cores as the signal + and signal - with the sleeve being grounded and not used for any of the signal path unlike in a stereo connection where its a common signal -. Generally called balanced mono as opposed to an intrument cable which would be called an unbalanced mono.


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Jimmyd
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Re: FX loop wierdness

« Reply #16 on: August 20, 2008, 10:27:55 PM »

Hywelg, thanks for the explanation. Would the G-sharp still function with instrument cables into the OTS?

On a slightly different OTS loop topic, today I plugged a 15' patch cable into the loop and the amp became noticeably fuller, less attenuated and possibly even more "open". Then I ran my RedPlate D'lator by itself into the loop and the OTS became even more alive. This was especially noticeable on the lead tones. (I'm really digging the OD tone with the PAB off) I'm starting to get a big grin on my face when I hear this OTS with the loop in use.

I'm becoming convinced that using a D'lator in the loop of any Dumble clone is an integral part of the experience and HAD's conception of how these amps must work.

Now I just want some sweeter more 3-Dish cleans and I'll be real happy.

Jim


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hywelg
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Re: FX loop wierdness

« Reply #17 on: August 21, 2008, 08:42:55 AM »

Quote from: Jimmyd on August 20, 2008, 10:27:55 PM

Hywelg, thanks for the explanation. Would the G-sharp still function with instrument cables into the OTS?

I'd think so I haven't got my g-sharp yet to try it still waiting for the dealer to get the g-switch to go with it.

Quote from: Jimmyd on August 20, 2008, 10:27:55 PM

On a slightly different OTS loop topic, today I plugged a 15' patch cable into the loop and the amp became noticeably fuller, less attenuated and possibly even more "open". Then I ran my RedPlate D'lator by itself into the loop and the OTS became even more alive. This was especially noticeable on the lead tones. (I'm really digging the OD tone with the PAB off) I'm starting to get a big grin on my face when I hear this OTS with the loop in use.

I wish I could get my hands on a few of these 'ators to try. Some have mentioned the K rolls off the highs somewhat, which I'm not keen to do, but I do know that the OTS doesn't sound as 'BIG' as a TR CRS (which has its 'ator built in apparently).


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JohnE
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Re: FX loop wierdness

« Reply #18 on: August 21, 2008, 11:33:53 PM »

Basically, I use the TRS cables because I have had a need for them in other situations and they do a good job, but TRS is not necessary. My 2 foot TRS cables are good quality. I don't remember the brand. Good cables really do make a difference in sound quality. Even very expensive cables have different qualities. For, example my George L .155 cables pass a lot more high frequencies than my Planet Waves cables. THe G Sharp has mono jacks for right and left channels. This works fine if you are going into dedicated right and left inputs on a stereo amplifier. If you are going in to a single TRS input with a splitter it would be best to use all TRS cables. I have one of these splitters and it will not work with mono cables.

I haven't really found stereo effects to be of much use for live play and they are achieved pretty easily with any modern recording set-up.


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JohnE
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Re: FX loop wierdness

« Reply #19 on: August 22, 2008, 12:00:05 AM »

Quote from: hywelg on August 20, 2008, 08:20:02 AM

It sounds like the g-sharp is compensating for the loss of volume inherent in the BBE (due to impedance mismatches).

Do you find any inconsistency with the master volume with this setup, others have noted its ineffective past a certain point?
[/quote
Hi Hywel,
I don't know if this is any use to you but:
The input impedance of the BBE 482i is 47K ohms. The input is unbalanced (the 882i is balanced). An impedance mismatch can cause a signal loss.

The output impedance is 1K ohm. The recommended single load impedance is 10K ohms. The maximum output is rated at +18dBu.

I have the the BBE 482i output going into to G Sharp input, the G Sharp connected to the OTS loop send and the OTS loop return going to the BBE input. This routing produces full volume and tone.

My OTS master volume seems to work fine (with or without any thing in the effects loop), but it has always seemed to have less effect than M/V's that I have experienced on other amps. On most amps you can use the M/V to clean up your tone, this has to be done other ways on the OTS.

Cheers!


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hywelg
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Re: FX loop wierdness

« Reply #20 on: August 22, 2008, 07:40:46 AM »

Quote from: JohnE on August 22, 2008, 12:00:05 AM

I have the the BBE 482i output going into to G Sharp input, the G Sharp connected to the OTS loop send and the OTS loop return going to the BBE input. This routing produces full volume and tone.

I think you might have written that incorrectly! Surely its OTS Send -->BBE Input-->BBE Output-->G# Input--> G#Output-->OTS Return.

If its any other way I really don't understand how the FX loop works!!


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JohnE
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Re: FX loop wierdness

« Reply #21 on: August 23, 2008, 02:35:22 PM »

You are correct. Send to BBE input, BBE output to G sharp input, GSharp to return is how it is connected. Thanks!


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