The Official Sequential/DSI Forum

SEQUENTIAL/DSI => OB-6 => Topic started by: ohryan on April 22, 2021, 02:28:58 PM

Title: Loud pop and LED flash powering on/off OB-6
Post by: ohryan on April 22, 2021, 02:28:58 PM
Hey guys! When I turn off or on the OB-6 I get a large pop sound and the LED flashes on/off then back on and it's good.
I just got the OB-6 and I've never seen this on my Prophet 12, so I was just wondering if its normal. Seems like it just takes a big surge of energy which may be normal. But I now make sure I'm not wearing headphones when I turn off/on because it's a pretty harsh click.

Thank you :)
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: IsoldeandIsobelle on April 27, 2021, 03:41:41 AM
Hey guys! When I turn off or on the OB-6 I get a large pop sound and the LED flashes on/off then back on and it's good.
I just got the OB-6 and I've never seen this on my Prophet 12, so I was just wondering if its normal. Seems like it just takes a big surge of energy which may be normal. But I now make sure I'm not wearing headphones when I turn off/on because it's a pretty harsh click.

Thank you :)

Yes, I have the same thing here.
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: geoffroy on April 27, 2021, 08:35:35 AM
Same thing here too !
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: MPM on May 02, 2021, 01:40:37 AM
Rule #1
Turn volume all the way down before powering on.
Rule #2
Turn volume all the way down before powering off.
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: Hue Awkwardstares on June 13, 2021, 08:53:50 AM
Rule #1
Turn volume all the way down before powering on.
Rule #2
Turn volume all the way down before powering off.

 ;D

Yeah it's normal.
Happens with my OB-6 but not with the Pro 6.
*shrug*
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: AlainHubert on June 13, 2021, 10:37:39 AM
Perfectly normal, if somewhat irritating.

That is due to the fact that Sequential (formerly DSI) didn't want to spend an extra $2 per unit to add a temporised output muting circuit consisting of 2 FET transistors (or one small electromechanical relay) to temporarily and automatically mute the output of this $3000+ instrument when powering it on, or off. Even my 36 years old Korg DW8000 has such a small circuit inside.  ::)
Title: Re: Loud pop and LED flash powering on/off OB-6
Post by: St8kout on July 06, 2021, 02:47:27 AM
It also does it with headphones even with the volume all the way down. Happened just the other day. I moved the OB6 to a new spot and didn't want to run the audio cables just yet, so I used the headphones. My ears are still ringing a bit.

A lot of audio equipment does this, including my Babyface Pro interface. I have all four powered Yamaha speakers & sub on a power strip so I can turn them all on/off with one switch, but sometimes I forget and get that loud pop just unplugging the USB from the Babyface (which is what powers it). These are also my PC speakers, and the PC will make them pop on shutdown if I forget to hit the switch.