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Author Topic: Sound Professionals SP-SPSB-1 with gain controls?  (Read 1787 times)

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Offline ol' dirty taper

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Sound Professionals SP-SPSB-1 with gain controls?
« on: May 15, 2020, 10:12:33 PM »
I just picked up this 9v battery supply in a minidisc collection. What has me slightly confused is this unit has two gain slider controls and is in an otterbox case.

Did the first versions of these come in a box like this? Were the slide controls added later for this as a custom job?

I bought this lot of old equipment figuring I could use this SP 9v supply as an alternative to the really simple Church Audio one I've used for a decade +

Just curious if anyone else has seen a model quite like this.

Mic : Beyerdynamic MC930 SS | Naiant X-X Omni Pair | Beyerdynamic TG L34C Pair | AT831s Pair (CA - HI SPL mod)
Deck : Sound Devices MixPre 6 | Sony PCM-A10
Pho/Vid : Sony a58 | Panasonic ZS100 | DJI Osmo Pocket 3
Play : Beyerdynamic DT990

Offline illconditioned

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Re: Sound Professionals SP-SPSB-1 with gain controls?
« Reply #1 on: May 16, 2020, 03:50:56 AM »
Looks like a limited production unit.  I remember seeing these.
Very nice construction inside.
Good capacitors.
Switch for roll off.
The sliders all you to attenuate a bit more, if you were using a device that clips on input.
Most modern flash recorders have a wide range of input levels, but this is certainly nice to see.  You can set the levels of the sliders inside to box, tape them down and not worry about it.

Please DO NOT mail me with tech questions.  I will try to answer in the forums when I get a chance.  Thanks.

Sample recordings at:

Offline dgny

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Re: Sound Professionals SP-SPSB-1 with gain controls?
« Reply #2 on: August 09, 2020, 07:41:35 AM »
 I have this box. Yours is newer than mine, I did not have a hinged cover (four screws on mine). Purchased in '98.
The sliders were added for recorders that had to be put in pause-mode to change levels. Mostly minidisc recorders.
This really was a great solution for level adjustment in that situation.
MBHO 603 ka500>SD mp2> Sony D-50


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