early 1980's Peavy KB300 speaker connectios.

This forum is for talking about Peavey keyboard amplifiers.
Post Reply
Parda
New Member
Posts: 3
Joined: Wed Oct 19, 2022 9:44 am

early 1980's Peavy KB300 speaker connectios.

Post by Parda » Wed Oct 19, 2022 6:44 pm

I just picked up a KB300 made in the early 80's with both the horn and the 15" speaker disconnected from the cuircut board, just bare wires. according to the wiring diagram there should be 2 pins that they should connect too. but when I look at the board there are 3 pins. 2 that look to be male and one off to the side that looks to be female.
How do I re-connect?
The unit does not have any serial tag on the case.
it has 3 channels all of which are 1/4" phone plug. 130 Watts, 23 V RMS, 4 OHM min speaker load.
Weight close to 80 lbs.

User avatar
dak
Member
Posts: 200
Joined: Fri Dec 24, 2021 7:20 am
Location: Germany

Re: early 1980's Peavy KB300 speaker connectios.

Post by dak » Fri Oct 21, 2022 8:10 pm

I have not opened mine right now, but does the following help?
kb300.png
kb300.png (41.89 KiB) Viewed 2107 times
Looks like the two close pins are the same trace anyway.

If the speaker is a Black Widow (no idea about the Scorpion version), for a neutral reproduction you'll likely want tone controls for bass comparatively neutral, mids 6dB down, treble 5dB up. Putting everything into neutral doesn't work for me, and I've seen classified ads that happen to show the controls in similar positions, so I am probably not alone in my hearing.

Parda
New Member
Posts: 3
Joined: Wed Oct 19, 2022 9:44 am

Re: early 1980's Peavy KB300 speaker connectios.

Post by Parda » Sat Oct 22, 2022 4:15 pm

The two dark connection (SPKR) act odd. Taking one or the other and going to the Light connection too its left makes the speakers work. What I dont know is why the two dark connections is one or the other better. Do the both go to the Lighter connection?

Parda
New Member
Posts: 3
Joined: Wed Oct 19, 2022 9:44 am

Re: early 1980's Peavy KB300 speaker connectios.

Post by Parda » Sat Oct 22, 2022 4:16 pm

PS the Speaker is a Black Widow.

User avatar
dak
Member
Posts: 200
Joined: Fri Dec 24, 2021 7:20 am
Location: Germany

Re: early 1980's Peavy KB300 speaker connectios.

Post by dak » Mon Oct 24, 2022 7:27 pm

Parda wrote:
Sat Oct 22, 2022 4:15 pm
The two dark connection (SPKR) act odd. Taking one or the other and going to the Light connection too its left makes the speakers work. What I dont know is why the two dark connections is one or the other better. Do the both go to the Lighter connection?
I wouldn't consider one or the other better: they are connected. I think it's just three pins because the double pin acts as a key for the plastic connector (the one you don't appear to have any more) to get the right polarity. Or it's an extra tap for measuring or connecting things (getting an extra ground is easy in comparison). I've not reopened my KB300 to actually take another look.

At any rate: doesn't look like a point worth worrying about.

User avatar
j0nsnell
Member
Posts: 15
Joined: Wed Dec 21, 2022 1:33 am
Location: Jurasic Coast, Great Britain
Contact:

Re: early 1980's Peavy KB300 speaker connectios.

Post by j0nsnell » Sun Jan 08, 2023 4:33 am

Screenshot 2023-01-08 at 10.28.55.png
Screenshot 2023-01-08 at 10.28.55.png (151.19 KiB) Viewed 561 times

Post Reply