Why do some amps have twin sets of binding posts?

[@gaborsgoulash]

Jaysus. You have a lovely presentation. Very good channel indeed.

[@BryanTorok]

OK, leaving out the extreme ends of way too thin wire for the application, Bi-wire is 98% snake oil. BTW, I have a BSEET, so I should have some credibility. All wire has some inductance, capacitance, and resistance. Longer runs have more, shorter runs less. Paired wires will have more mutual inductive and capacitive effect than widely separated wires. Inductive reactance (AC resistance) goes up at higher frequencies. Capacitive reactance goes goes down at higher frequencies. These qualities are used in the filter networks commonly used for crossovers in two-way, three way and more-way speakers to direct the frequencies to the appropriate speaker, commonly sub woofer, woofer, mid range, tweeter. Granting the above, wire can have some small, but measurable, effect on the output. That effect is so small as to be swamped by myriad other factors if one uses a large enough wire for the power levels you are using. I'm guessing that for some people and some music, they may be able to discern a difference in an A-B test. But, I would bet that even for those people, if they walked into the room an were played a piece of music in a double-blind study their ability to correctly identify bi vs. single wire would be no better than chance.

[@oysteinsoreide4323]

I find it most important to have thick enough wire so the loudest sounds get unhindered through. But that cable doesn't have to cost much though. I actually have better sound with a single thick wire than the bi-wire set I had before.

[@filippiasec]

Not all wires have the same resistance, why would you claim it to br so?

[@Morgooooo]

Most of the manufacturers were making dual binding posts for 2 set of speakers! Bi wiring is just a nowadays style.

[@kennethsrensen7706]

Yes you are right and this leave us with the confusing of this question -- Do they simply ' save the switch away to cut cost ' ? Could very well be that . Back in time almost all HiFi amplifiers have two sets of terminals but also have a swtich so you could switch between them and have two set of speakers connected and either run set A or set B or both set A + B or cut both . Many would use them to Bi wire and simply set the switch to A +B and leave it there . Many others would use two set of speakers having the choice of what ones to use . So , well have two terminals with no switch will be bad if use two set of speakers because they will both all time be connected . That leave this as a Bi Wire option only . Edit - Sorry my typos im in my early coffe now

[@raymondleggs5508]

B- wiring means Buy more wire!

[@tomtaylor7292]

Wrong but your right,,!!! Weird,,,

[@kencohagen4967]

Front and back of the room? I've run four speakers with most of my amps. The first time with the rear speakers wired in a Hall effect to simulate surround sound before there was such a thing. Then companies came out with 4 channel surround that had simulated surround, which basically was the same thing as wiring your amp in a Hall effect for the rear speakers. Also, when we had parties at my house I would be running speakers in two rooms. The living room and the family room, which we had a pool table and dart board set up in. The family room also had several beer and liquor displays hanging on the walls along with several neon lights. Total bachelor pad!

[@adotopp1865]

Oh dear ken

[@johnsweda2999]

Still don't get it from a manufacturers point of view it can be achieved with the two binding posts you can connect two sets of wires in one set of binding post so what's the point,

[@jonathansturm4163]

The A, B, or A+B switch won't do anything if you use only one set of binding posts. On a different note, I couldn't hear any difference between bi-wiring and using just a single run of heavy duty figure 8. I didn't use Litz wire for the tweeter run though.

[@johnsweda2999]

@@jonathansturm4163 not talking about ab selecting what different does that make?

[@jonathansturm4163]

@ John sweda It makes a difference to me. Sometimes I want one set of speakers operating, sometimes the other, sometimes both even. That _cannot_ be achieved with one set of binding posts.

[@johnsweda2999]

@Larry Niles hear difference in what having two terminals?? course you're not how does that work out if both terminals are tied together makes no difference one two or three

[@johnsweda2999]

@@jonathansturm4163 yes but that's not what I was talking about or was Paul if you've got two sets of speakers and you want to change between them yes that is good but that's not what I'm talking about.

[@ericnortan9012]

#12, oxygen free, not too $$$, shortest runs within reason, always got great sound and I have 15" 3-ways.

[@bigd8628]

Hi Paul, for a decent home stereo with an amp having single pair of output posts and speakers with dual sets for bi-wire what kind of wiring do you recommend for the lows and highs?Dario from Montreal, Canada.

[@noahtheviking1]

blue jean cables or audio quest has those!!

[@andydelle4509]

While it's quite true that different wire construction and materials react differently to different frequencies, what many audiophiles don't realize is that none of this makes a hill of beans worth of difference at lowly audio frequencies. Sure bi-wiring speakers can be modeled by mathematics, perhaps even measured with sensitive test gear. But hearing it? I don't think so, the magnitude of the difference is far to small in the face of the electrical noise floor and a typical speaker sensitivity. A good example of where it does matter is your satellite or cable TV wire. You don't ever see speaker wire or zip cord used for that. But then 1ghz is quite a bit different from 20khz! If you want the advertised benefits of BiWiring, then do it right and use line level crossovers and multiple amps - but that's expensive and difficult to get right sound wise.

[@andydelle4509]

@Larry Niles- And you studied electrical engineering when and where?

[@jonathansturm4163]

@ Andy Delle ROFL! We have no _evidence_ you studied electrical engineering, or that you are a competent engineer. Funny but true story. There was a graduate of the engineering faculty at UTas who applied for a job as an engineer in Melbourne. The job interview included him being given a design specification and to actually design whatever it was. Apparently he was incapable of executing the design and so didn't get the job. So our fully qualified engineer attempted to sue the university for failing to turn him into a competent engineer.

[@andydelle4509]

@@jonathansturm4163 "We have no evidence you studied electrical engineering" Really? here's a good start: kzbin.info/www/bejne/mHawpqSlaJ2fgJI You also have my name, easy enough to do a search.

[@jonathansturm4163]

@@@andydelle4509 Here in Australia we have what is called the National Professional Engineers Register (NPER) managed by Engineers Australia. When I google "professional engineers usa" I get links to our NPER and Engineers Australia, but nothing related to professional engineers in the USA. Were you Australian, it would be trivial to look up your status on the NPER. Is it the case that all you need to be a professional engineer in the USA is to make a youtube clip? Disclaimer: before retiring I was involved in the accreditation of building professionals which includes several engineering sub-disciplines.

[@haiguyse]

@@andydelle4509 Just because you can't measure it does NOT mean it does not exist. See the fallacy of your argument? Your argument is not grounded in science based thinking at all.

[@lcarliner]

The reason for multi-stranding is to reduce the skin effect resistance, I believe.

[@marc.0000]

Sorry, but in this case... can you only use these kind of amps with two ways speakers?

[@byrong1561]

It makes no difference. The speakers could be any number of drivers so definitely not restricted to two way speakers. Its not the drivers on the front that matter. Its the number of binding posts at the back

[@lroy730]

Multi Gauge Wire works best for mid and highs. Tri-Amping gives you the most control. All big boy PA systems are at least Tr-Amped some Quad Amped with a Sub System mounted in the Center of the Venue ! Like the Myers Sound PA for Metallica. But Not very Hi-Fi, not even Stereo ! When can we get Stereo in Live PA Sound ?

[@adotopp1865]

Just get rid of the speakers then it will be stereo.

[@poserwannabe1]

LRoy they're stereo right now and have been for years...

[@lroy730]

@@poserwannabe1 If its a venue for more than 2K people you would wrong . I used to do Live Sound , and we did only a very few Stereo set ups . Those were smaller Venues with bands that were personal friends. Why Not Stereo ? Because its more equipment more time with little pay off, because very few even notice, because there's a (Sweet Spot) that's Stereo the rest of the room isn't. Why did Pink Floyd stop doing Quad ? Same reasons. Most large venue concerts are Mono.Here's a great article > Link>www.mcsquared.com/mono-stereo.htm

[@lroy730]

@@adotopp1865 Yes that works great for an orchestra in the right sized room or smaller quartets in smaller rooms. That's pure sound !

[@poserwannabe1]

@@lroy730 I also do live sound and I'll send u a link later to explain

[@googoo-gjoob]

what i want to know....why does the B&W SA1000 have twin binding posts? its a single channel amp. they say it is a mono amp which delivers 1000 watts to TWO subs. i dont get it.

[@googoo-gjoob]

@Carl Capps & Zi m, thank you both for taking the time to address my question. however, i must have failed to convey my question. how can a 1000w MONO amp provide 1000w to TWO subs? i'd understand if you told me it was a 2 channel amp. i'd understand if power was halved when running 2 subs. i do NOT understand how a SINGLE channel amp can provide the SAME power to 2 subs.

[@jimolson9671]

Your intuition is correct. The power will be shared between the two sets of binding post

[@googoo-gjoob]

@@jimolson9671 that makes perfect sense. but B&W says it provides the FULL 1000 to BOTH speakers. smells fishy to me.

[@poserwannabe1]

@Carl Capps I had excellent results with Adcom back in the day, good stuff !!!

[@MosoKaiser]

Quick guess: buy-wiring. Edit: i.e. just have decent quality quality wiring going to your speakers and you'll be ok.

[@adotopp1865]

Please say what decent Quality is ? Is it QED 79 strand? Will this be OK for my Mission 700 speakers from my Musical Fidelity A1 amplifier?

[@andreasmuller5693]

Just baught me some decent IEMs 1MORE Quad Driver and now for the first time really could hear the difference between 320kbit MP3 and flac. Before that it was just guessing what was better and now you just hear it. So for all the people, who are not believing it. You first need the speakers of the level like the IRS V to hear those minor differences, without that it just goes under in the noise the loudspeakers are producing anyway. Paul even says he tested all kinds of cables on the KEF LS50 of his wife and could't hear anything. So before being so outraged about it, make a journey to PS Audio and hear for yourself on an audio system, that can show up these differences. After not hearing shit, then you still can say it's BS.

[@stevevigneault8923]

I have a pair of Eumig(made by Luxman) m1000pover amps. They have 2 sets of binding posts and buttons for A and B. They date from 1980. I believe this was not for bi-wiring but to run 2 pair of speakers for a quad set up, which was a thing then. I have them set up so that I am bi-wiring and bi amping, using the a channel to the tweets and the b to the bass on a pair of PSB towers , 1 amp for each speaker. A slightly different scenario to that described in your video. Anyone else here do this.

[@petermartin9494]

Twin sets are a waste of space and money. If you have one pair of posts the same result is achieved if you connect the thick(woofer) cable and the thin(tweeter) cable to the same posts.

[@visby750]

hey, now i can watch PS Audio's videos on 4K format

[@victorfeliciano6094]

love this video, but to bad it short for information. thanks!!

[@janinapalmer8368]

Bi wiring does definitely have merits ... there's not much point in bi wiring if you are only going to listen at low levels .. example , background music . But if you really want to give it some stick then go bi wire .. especially if the cable lengths are over a metre

[@genez429]

You will need to buy wire to bi-wire...

[@zogzog1063]

🤳

[@tomtaylor7292]

Paul,,, wot hi fi do you have,???? And wot speakers,?????? Umm,??? Fisher price,,!! Joking,,, wot do you listen to,,????? And wot about directional wiring,,??

[@AtomicAutopsy]

wot wot

[@ericmc6482]

You jest about wire directionality, it's real and every cable exhibits directionality. The effect is system current noise is different according to half wave polarity, it's audible and it's fixable.