Attention Sansui amplifier owners and how to avoid blowing up your amplifier

Can Sansui amplifiers handle 2 pair of 4 Ohm speakers

[@robbiekerkhof]

Very good.video Andrew i whas the guy sansui dont like to sets of 4 ohm but my harman kardon hk6500 also very good amp has a switch on the back you can Chooose between 4 ore 8 oms this amp had no problems driving. To sets of 4 ohm speakers .

[@vintagestereo]

Hahaha, I didn't mentioned your name....

[@RoderikvanReekum]

That's a good series of Harman Kardon amplifier, they can run power hungry speakers, the top of the line HK6950 looks amazing.

[@wielentschoten6904]

A friend of mine had the avr 7000 receiver. Can go up to 1200 amperes. Very nice receiver.

[@radoslavsponski9238]

Sir, you are the reason that I have my Sans AU 919. The sound is unbelievable! Best Regards!

[@TheDistrict644]

The best way to not have this problem is to make sure the amp is off prior to connecting the wires. I do this all the time now, but, I can say before i was a criminal of not doing it. The reason for that was, me constantly rotating equipment and speakers. After you shut down the amp, make sure each wire is fully connected and snug tight. You're better safe than sorry.

[@jjinglenuts]

Connect or remove speakers wires when the amp is off, using A+B at the same time make sure they are 8 ohms or higher don't connect 4 ohms on A and 8 ohms on B that will trigger protection circuit if you keep turning amp on after it shuts off it will damage your amp .

[@anthonyhfe6450]

Good video for those not in the know about audio or for young audio fans!! But it's not just Sansui. It's every manufacturer, for sure, my friend. Just pay attention to the markings by the speakers and you will be smooth sailing and not overtax your amplifier. What I mean by overtax is "draw too much current from it". 4 ohm speakers are not 4 ohm all the time. Impedances can dip lower than 4 Ohms. When you play two 4 ohm speakers one one channel, most amps simply connect them in parallel when you have your switch in the A+B position. Or on some amps, if you press in speaker set A button and speaker set B button (same thing). So with two 4 ohm speakers, you're starting at 2 Ohms and this can dip lower. So the lower your speaker impedance, the more current your output stage will be required to supply. Some amps with thermal protection will shut down to prevent a catastrophic failure, but you don't want to test the protection circuits as they may not work, when you need them to. The other day one of my middle of the line Technics receivers shut down. We were overzealous and had the music way too loud into some 4 ohm speakers (alcohol will do that - lol). But she was ok once we let her cool down some. Most decent popular amps and receivers prior to the '80s can handle a 4 ohm load. But once you got to the mid eighties, most common amps and receivers could only handle 8 ohms minimum impedance per channel. Not an issue until you connect two sets of speakers and now you're at 4 Ohms. Bad news for many amps that are not higher end amps designed to handle such loads. One last thought. Please stop modifying vintage amps/ receivers with those large and cumbersome 5 way binding posts. Not only are they ugly, but they cause more problems due to their close proximity to each other. Leave vintage, vintage folks. If you have screws on your vintage amp/receiver, use insulate spade terminals on your speaker wires. I actually go a step further and solder my terminals to the wires for a failure-free low resistance connection. Then you simply back out your screws, slide the spade (U-shaped) terminal under the screw head and secure it. This approach has NEVER failed me yet. If your speaker screws can be fully removed, you can use insulated Ring terminals too. These are slightly more secure than the spade ones but take a little more time if you are always trying out different speakers, like me !! For the popular, spring loaded terminals, or the locking Technics type of terminals, just strip the wire to the proper length, and twist the strands together, so it's a nice, tight spiral. This way you won't have any stray strands of wire that can short out to the adjacent wire. Keep in mind to take the same precautions at the speaker side as well. Happy Listening 🎶 🎵🎶

[@supermopar7497]

Great advice. Excellent, & informative vid. Thanks.

[@ahmadalawadhi538]

I love you sooomach Mr andro please don't be lazy for your halthe it is more important than any think . olways love your video god bless you

[@flrn6233]

A speaker could be rated 4 Ohms, but in operation can go way below 4 Ohms. It happens to me on a Marantz rated 4-16 Ohms, with 1 pair of 4 Ohms speakers, and the Marantz always goes to protection the moment you start putting some power. A Sansui Au-317 with the same speaker got no problems at all, and I can put huge amount of power over them. I have 2 pair of Diatone speakers (rated 6 Ohms each), connected to a Sansui Au-4900, and the amp sound really good and have not given me problems at all (even if the amp says 8 ohms minimum for 4 speakers). For me, you need to be careful with the wires, to turn on an amp without speaker conected to the channels, or with loose cables, it's a recipe for disaster, and to use the A + B with different Ohms speakers, you better have money to replace the amp. Anyway, I think your friend is gonna be more careful from now on.

[@jacobsgarage1458]

Hi my Friend love your videos but you often repeat yourself multiple times lol Greetings from Copenhagen Denmark 🇩🇰

[@louisdefunes8952]

Good tip,Andrew. Make a short circuit is never a good idea..even it's just a few milivolts.If the wires are close to each other,use isolation tape.😀

[@geoffwalmsley3066]

Most modern amplifiers have circuit protection built into them,did it with a Yamaha amp, just needed to reset the amplifier.

[@gino3286]

hi i have noticed that usually connectors are placed too closed on the amp back plate And there is a lot of space wasted Strange Speaking of speakers cable i like very much the BFA type plugs They allow for a big contact surface

[@kieranmaharajah6933]

Could it handle a pair of 6ohm and a pair of 8 ohm

[@EastAngliaUK]

I did this on my Rotel 01 lucky it was just a fuse gone I fixed it on my own.

[@jojom5923]

Hi! Do you happen to came accross a Sansui A-E700 integrated amplifier? Do you know its rated power output? i’ve been searching the internet for the specification, but none found. Thanks

[@vintagestereo]

No

[@stringaudio84]

Deltron BFA plugs example :)

[@RoderikvanReekum]

It's parallel connected so two loudspeakers of 4Ohm on one channel (L or R) become a 2 ohm load on the amplifier. That's too low for most amplifiers on high volume. A person with basic knowledge of electricity can tell you more about it. It's ohm's law, but I forgot the details. I have blown up one amplifier by shorting the outputs because I was in a hurry! You make mistakes when you want to finish something fast. Some amplifiers have excellent protection so you can short the outputs whitout any problems, that saved the Day for me once. (NAD amp) And it's nominal impedance because the impedance changes with the frequency.

[@sirtainlee8725]

Perhaps he connected the speaker wires to a powered up amp, before the other ends were connected to the speakers. If those far ends are touching each other, that's a big problem. If I'm using bare wires, I will tie a knot in either the red or the white, so the two ends are at different lengths, and won't touch.

[@ruuuuusty]

Ok! I made this mistake last nite 😓😥😓😥 is there a solution ?

[@MrDwadi84]

I prefer banana plugs... Also I always turn off amp because I am using vacuum tube amps for years and this is common knowledge that such amps shouldn't be powered without soeakers connected.

[@D1N02]

Most amps are rated the same 4 Ohm for a single pair, 8 ohm for A+B. He probably ran them too loud too long. You won't blow up your amp just turning it on with 4 4ohm speakers running reasonable levels. You can also connect speakers in series. You connect two speakers to one output first to red, then from black of the first speaker to red on the second one. Then black from the second one to black in the amp. You repeat that for the left and the right output (so do not use speakers B, just A) That way you double the impedance and they will act as an 8 ohm speaker.

[@vintagestereo]

thx, didn't knew this

[@RoderikvanReekum]

When you wire them in series the impedance doubles! So two loudspeakers of 4 Ohm become a 8 Ohm load Two 8 Ohm loudspeakers become a 16 Ohm load.Some say it's bad for sound quality.

[@nudebaboon4874]

Yep, spot on!

[@wielentschoten6904]

What about a quadrophonic amplifier?

[@vintagestereo]

I really don't have a clue

[@wielentschoten6904]

@@vintagestereo me neither

[@addevries8163]

german speakers are often 4 Ohm

[@JohnLeaf]

There's the reason i only use 8ohm speakers

[@BobMonty99]

Do yourself a favour and get yourself Harman kardon from the 330s a b and c to the 530 or 920 twin . U won’t be blowing them up unless u get inside

[@vintagestereo]

kzbin.info/www/bejne/iIDFZJumZ6h5atU&ab_channel=vintagestereo

[@705johnnyboy]

not a fan of connectors close together ,so annoying