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Post by johneb on Jan 8, 2019 12:11:58 GMT -7
When I engage eq bypass on my maz18 nr everything in the effects loop of the maz is boosted to an unacceptable level. Has anyone else experienced this, or have an idea how to resolve the issue? Thanks
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Post by purpletele on Jan 8, 2019 14:18:36 GMT -7
When I engage eq bypass on my maz18 nr everything in the effects loop of the maz is boosted to an unacceptable level. Has anyone else experienced this, or have an idea how to resolve the issue? Thanks I think that is a new one, or at least I haven't seen or heard anyone with that issue. Just to be clear, when you step on the by pass pedal and dis-engage the EQ tone stack, the tremolo,delay or reverb that is running in the loop becomes very loud or distorted? I think that by dis-engaging the tone stack a +- 2dB boost is presented by removing those POTs (resistors) from the circuit. That additional current is going to supplement the FX loop circuit inadvertently. The elevated current is going to amplify the signal. I'm stuck there, interesting question and issue. I'm not sure this is relevant but do you have the variable volume on the bypass pedal?
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Post by zpilot on Jan 8, 2019 15:55:53 GMT -7
I't's a series loop and comes after the tone stack. Turn the pot back on your bypass pedal to about half way and see if that helps. At that position you will only be getting part of the bypassed signal and it won't boost your level as much. It also won't change your EQ as much. Also, the higher you run your tone controls the less difference there will be between bypassed and non bypassed modes. That's hard to do with the Bass control. Most players seem to get best results with the Bass around 10:00 or just where the bass starts to become apparent.
Be aware that the Cut control is AFTER the loop and will not affect it.
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Post by johneb on Jan 10, 2019 10:24:53 GMT -7
When I engage eq bypass on my maz18 nr everything in the effects loop of the maz is boosted to an unacceptable level. Has anyone else experienced this, or have an idea how to resolve the issue? Thanks I think that is a new one, or at least I haven't seen or heard anyone with that issue. Just to be clear, when you step on the by pass pedal and dis-engage the EQ tone stack, the tremolo,delay or reverb that is running in the loop becomes very loud or distorted? I think that by dis-engaging the tone stack a +- 2dB boost is presented by removing those POTs (resistors) from the circuit. That additional current is going to supplement the FX loop circuit inadvertently. The elevated current is going to amplify the signal. I'm stuck there, interesting question and issue. I'm not sure this is relevant but do you have the variable volume on the bypass pedal?
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Post by johneb on Jan 10, 2019 10:44:43 GMT -7
Thanks for the responses. Yes I’m running tremolo reverb and delay in the loop. They become overpowering when eq is bypassed. They do not become distorted. The bypass knob is about half way up and I have treble at 3:00, mid at1:00, bass at 9:00, and cut at 11:00. It’s running into a closed back 4x10 8 ohm cab. I was hoping to use the bypass for leads, and it sounds great that way other than the loop problem, but it looks like I may need to try a different approach...either take effects out of loop and use pedals for overdrive and Use eq bypass for lead boost, or leave as is and use a pedal for lead boost. I’d appreciate any and all suggestions on how to deal with this issue. I’m not only new to dr. Z but new to tube amps in general.
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Post by zpilot on Jan 11, 2019 5:51:34 GMT -7
The halfway position of the bypass control I mentioned is just a starting point. I would turn it down until you get to something you like. I run mine around 25%. Just enough that I start to hear some boost and the tone thickens a little. I don't think of it as a boost as much as I do just changing the character of the amp. I know that a few players have said that they always run with the bypass engaged.
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Post by johneb on Jan 11, 2019 13:42:12 GMT -7
Ok thanks zpilot. I guess my amp is probably working correctly. I’m just gonna have to use the bypass a bit differently than I expected.
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Post by baldeagle on Mar 20, 2019 21:43:39 GMT -7
I have a Maz 8 and an 18NR. I dont notice much of a volume increase of the effects in the loop when in bypass mode. But the built-in reverb in the Maz 8 increases to the point that it is unusable for me.
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Post by baldeagle on Mar 20, 2019 22:03:27 GMT -7
I have a Maz 8 and an 18NR. I dont notice much of a volume increase of the effects in the loop when in bypass mode. But the built-in reverb in the Maz 8 increases to the point that it is unusable for me.
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Post by premiumplus (Dave) on Mar 21, 2019 7:08:55 GMT -7
I have a Maz 8 and an 18NR. I dont notice much of a volume increase of the effects in the loop when in bypass mode. But the built-in reverb in the Maz 8 increases to the point that it is unusable for me. I've got the same two amps, and if you haven't had the MKII upgrade done to your amps, I wholeheartedly recommend it. The reverb, loop, and especially the Master Volume are vastly improved. I used to have Brake Lites in both of my Maz amps but with the new Master Volume you don't need them. You can go down to whisper volume levels and maintain 100% of your tone. I was ready to sell my Maz 8 because I didn't like the Master Volume on it...now it's like a new amp. The loop is way better too. The reverb is sweeter and doesn't overwhelm like it used to. It's really worth it.
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Post by Deleted on Mar 21, 2019 7:15:39 GMT -7
^^^If it's the MkII, it's got a buffered effects loop. If you run your time-based effects in the loop it should eliminate the issue. But yeah--this is part of the reason the Z variable boost pedal thing never really worked for me on Z amps without the loop--I typically run a little delay all the time to fatten things up, but hit that Z-boost and suddenly it's a LOT of delay. The same thing doesn't occur nearly as much if you use a regular clean/dirty boost pedal ahead of your delay, in my experience, at least.
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Post by baldeagle on Mar 21, 2019 12:26:24 GMT -7
My Maz 18NR is pre:MKII, the 8 is a 10/2016 so it has the enhancements, but there is still a big spike in the built-in reverb when the bypass is engaged. I totally agree that the MV is a big improvement. U feel very lucky that I was able to find a 2016 model in pristine condition at a reasonable price.
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