6v6 stereo tube amp schematics for Ohm load. Help please

[Switchtech]

Does this amp call for two 4 Ohm speakers pr channel or a total of 4 Ohm pr channel?

 

[cubdog]

I have no Idea but I bet you are the first AK member to post a poll for his first post. Bonus points because the poll isn't really a poll. Welcome to AK.

 

[Switchtech]

Had to choose a pole or it wouldn't let me post.
First time posting.
New guy here.

 

[cademan]

Well the schematic shows the output transformers as 4Ω output so one 4Ω speaker only per channel.

You would have to know to use two 8Ω speakers connected to both the internal & external connections so it would be a 4Ω load. The manual would also hopefully say so.

 

[Selmerdave]

4 ohm speaker load, either one 4-ohm or two 8-ohm in parallel per channel.

 

[gadget73]

What he said. 4 ohms total, internal and external were likely 8 ohm each.

Looks like its missing an amplifier stage. This is only a phase inverter per channel, usually you need a phase inverter and a gain stage along with the output tubes.

 

[larryderouin]

The preamp is separate (look around the plug).

 

[Switchtech]

What he said. 4 ohms total, internal and external were likely 8 ohm each.

Looks like its missing an amplifier stage. This is only a phase inverter per channel, usually you need a phase inverter and a gain stage along with the output tubes.

 

[Switchtech]

Some folks are saying that because of the open Ground, "the amp accepts 2 "4 Ohm loads pr channel". Getting mixed answers.

 

[Switchtech]

What he said. 4 ohms total, internal and external were likely 8 ohm each.

Looks like its missing an amplifier stage. This is only a phase inverter per channel, usually you need a phase inverter and a gain stage along with the output tubes.

The internal speakers are at 4 Ohms.

 

[gadget73]

not sure what they mean by open ground. Its very clearly grounded on the speaker secondary, which it has to be for a global feedback amp.

Either way, it seems fairly clear to me that its a 10K primary and a 4 ohm secondary based on what the schematic has printed on it.

 

[gadget73]

The preamp is separate (look around the plug).

right. My point being that the amplifier as it stands isn't a complete unit, you'd need the preamp that goes with it in order for it to work properly.

 

[Switchtech]

not sure what they mean by open ground. Its very clearly grounded on the speaker secondary, which it has to be for a global feedback amp.

Either way, it seems fairly clear to me that its a 10K primary and a 4 ohm secondary based on what the schematic has printed on it.

Thank You. So two pair of 8 Ohm or one pair of 4 Ohm pr channel?
Sorry for the illiterate's.

 

[tcdriver]

Thank You. So two pair of 8 Ohm or one pair of 4 Ohm pr channel?

Yes, you got it.

 

[Switchtech]

Really appreciate everyone's help. Still having trouble understanding this.
The unit come stock with 2 internal speakers and 2 external speakers. I do not have the external speakers, but do have the internal speakers.
Where it gets confusing is the internal speakers are reading @ 4 Ohms.
Some people and saying that the amp is designed to operate with 1 or 2 pair of 4 Ohm speakers, kinda like some fender amp designs.
Stuck in limbo and unable to begin a speaker system build.

 

[larryderouin]

If this is a Voice of Music Amp, the best guy who'd probably know is Gary Stork @ www.voiceofmusic.com I'd run it as is with the one set of speakers and not worry about external's. it's possible that there is a switch that isn't shown to switch between the two speaker pairs. Look for an Internal/external spkr switch in the back or on the control panel.

Larry

 

[larryderouin]

Take a look at this thread on this forum http://audiokarma.org/forums/index.php?threads/vm-812-whats-cookin-cap-id.706781/ He's got the same amp and they mention the different ohms of the woofers and tweeters.