This is like receiving a lecture from your favorite professor.

@theaudioanalyst

Жыл бұрын

Hello Johnson. Thank you! I'm glad you enjoyed it!

I recently started bi-amping my speakers, a bit late in my late 40s. It turns out I'm a keen amplifier and speaker buyer, and I had no idea what I was missing out on. In my opinion, the sound quality has improved by 40%. It's not just about the increase in power, but the clarity of the highs and midrange has also improved significantly, and the lows have become more prominent. I can't believe I missed out on this for years. If I had known earlier, I could have saved so much money.

@theaudioanalyst

5 ай бұрын

Well, better late than never, right? I'm just glad you found out and are taking advantage of the method! ;-)

While you handled the configuration options very well, your technical explanation of the impact of the back EMF was flawed and way overstated. This is because that signal sees a voltage divider made up the the high impedance of the upper crossover and the virtual short of the amp’s output impedance depending on the inductance of the speaker wire at low frequencies. Typically back EMF is greatest at driver resonance which will be very much below the passband of the upper crossover and drivers, so even if you were able to measure some micro/milli-volts at the tweeter terminals due to a design with a very shallow crossover slope there would be no resulting acoustical output.

Hi Greg! I was wondering what your opinion would be with using four independent, identical amplifiers to bi-amp a pair of large speakers? I have a pair of Bowers & Wilkins 801 D4s coming in and am considering buying another set of monoblocks. Thanks!

@theaudioanalyst

Жыл бұрын

Hello... This is a commonly used option today, and offers a step up from using two identical stereo amplifiers in the vertical configuration. Using four mono amps instead of two stereo amps would *typically* allow you to apply more power, as mono amps *typically* allow for higher output per channel than similarly priced stereo amplifiers. And unless your chosen stereo amplifiers offer true dual mono power supplies, which would necessitate two separate power cords per stereo amplifier, you will have better isolated power supplies, further diminishing the cross-talk between channels, improving channel to channel signal isolation. Let us know how you find the results if you make that move! Thanks for taking the time to write! Enjoy.

Enlightening video about biamping thank you. Maybe a part two could focus on use of 4 monos where 2 are tube, which may be better for mid and tweeter. Also, what if you have a 600 W mono which is more than enough for each main speaker and wondering if using 2 additional mono amplifiers might only have marginal benefit in a biamp world?

@theaudioanalyst

Жыл бұрын

Hello. Thanks for writing. But I’m sorry to say that I see no particular cause to address either of the two specific applications you've proposed. Firstly, you seem to be implying that just by using a valve-based amplifier one would gain some inherent “advantage” by virtue of the use of a tube-based design. That is not necessarily, or in my opinion, even likely, to be the result. Most tubed amps are, well, more colored and prone to euphonic distortions than solid-stage amplifiers in the same price range. Clearly, not all, but… As to using high powered mono’s, the sonic advantages realized by biamplification are still realized, regardless of the output power of any of the devices in use. One should feel free to experiment with them, of course, but... 😏

I have been bi wiring since the late 70's with a pair of KEF Chorales. I bought the upgraded x over and put it outside the cabinet so that i could easily bi wire. I still have the speakers to this day. I have been bi amping my large stand mount and floor standing DIY speakers since the mid 1980's. I have also active bi and tri amped various diy speaker projects since the mid 1990's. I have a few interesting videos on my You Tube page and on my Face Book page. They are worth watching and are a enjoyable

Very clear explanation. i will take youre advise about the vertical method bi-amping is way better than horizontal thanks.

I always understood that separating in general is better for your system going from a receiver to an integrated amplifier to pre-and power amp to mono blocks as for wiring but thank you for clarifying the base feedback to the crossover I did not know that part.

Another connection possibility for Passive Vertical bi amping (when the power amp allows) is to feed L channel pre output to one channel of the stereo power amps inputs.. and then use the loop out (from that channel) to pass the signal to the other channel input on the amp, thus both receiving L channel info...Then connect to the split bi ampable crossover (jumpers removed).....repeat R channel pre output for the other power amp/loudspeaker .... I only mention this as it prevents the need to source a Y splitter.

@theaudioanalyst

3 жыл бұрын

Hello Marcus... You are right, I did completely space that option for Vertical bimamplification. And interestingly enough, Phil Jackson, of Parasound, shared that exact same suggestion... Take note all, that is a way to avoid the Y type connection - IF YOUR AMPS allow it... Thanks, Marcus and Phil!

Hi Greg, thanks for another great video! Since you are on the topic of Bi-amping, I was wondering if you could help shed some light on how it compares to using mono-blocks. Essentially, by using two amps in vertical configuration, you should be getting the same benefits of monoblocks by having a dedicated power supply unit for each channel. If so, how come most high end systems lean towards the use of monoblocks instead of biamping? I suppose one could still get the benefits of biwiring with monoblocks. Thanks!

@theaudioanalyst

3 жыл бұрын

Hello Dan. Thank you for your kind words on my efforts with the channel... As to your question, honestly, there isn't THAT much difference, overall, save for two primary concerns. Maximum power output (and its possible resultant peak output capability prior to clipping) and the added expenditure for two sets of (normally) costly interconnects. Stereo amplifiers TYPICALLY do not come with as high a power rating as monoblocks. Examining at the first attribute, the stereo Constellation Inspiration 1.0 amplifiers I reviewed (positive-feedback.com/reviews/hardware-reviews/constellation-inspiration-1-0-linestage-amplifier/) were rated at 200Wpc into 8Ω, and 400 into 4Ω, whereas my Audionet MAX monoblocks are rated at 400Wpc into 8Ω, and 700 into 4Ω. The headroom and peak output power is nearly twice that. Granted, that will only account for about a 3 dB increase in maximum volume, but it DOES greatly extend the headroom and diminish the likelihood of ever clipping. The second issue is also significant, especially in a configuration like mine where the equipment stand is off to the side of the room and the run to the amplifiers from the linestage is some twenty feet. In my case, where the interconnects I use to make that connection are over $8,000 a pair, that will significantly increase the overall cost of the installation, with no other real significant benefits. Vertical biamplification is a great choice for someone building their system and trying to maximize the effectiveness of their expenditures. So, let’s say you currently use a Parasound Halo A 23 you bought a few years ago. You see one come up used on eBay or AduiogoN for $450… You can buy into vertical biamping, and the serious advantages it offers, even adding some cables, for a fraction of the cost of moving to new - or even used - monos. This is ONLY an example, and there may be dozens of other similar scenarios. I would add that if you are starting from scratch, biwireing monoblocks would, all else being equal, offer the most effective results. I hope this helps answer your question. Thanks for taking the time to write.

It would be nice to know a source for high quality "Y" adapters. Do you know any manufacturers? Can you share them with us?

@theaudioanalyst

3 жыл бұрын

Hello! I guess that is a fair question! 😁 Here is a link to the metal-bodied style that I mentioned, and prefer because they are short (less electrical involvement) and solid, from Audioquest... www.audioquest.com/accessories/splitters-connectors-adaptors/adaptors/hard-rca-splitter-male-to-2-female Here is a link to a set made with wire...also from Audioquest... www.audioquest.com/accessories/splitters-connectors-adaptors/splitters/flx-x-rca-splitters-male-to-2-female While you may have issue finding these on a shelf in a retail store, both are available online from sources like Crutchfield or Amazon... www.amazon.com/s?k=audioquest+Hard+RCA+Splitter+%28Male+to+2+Female%29&ref=nb_sb_noss

@hiresaudiocosta873

3 жыл бұрын

@@theaudioanalyst Thank you so very much for the information!!!! I wasn't aware that Audioquest made "Y" adapters. I use the older Audioquest Diamondback RCA interconnects on my system and I love the vast separation between instruments that they provide. For me they make the sound stage more expansive both in width and depth as the negative space around each instrument becomes much larger and more spacious than with inferior cables. I happen to use quad amplification, and 6 equal length 10 Gauge speaker home runs for the front L/R woofer, mid-range tweeter and one short run for the sub. I pair my tweeters, mid-ranges, and woofers on their own amps and the sub has it's own amp as well. I don't have a need for the high quality "Y" adapters at the present moment, but I did need them in the past and couldn't find them and perhaps I may have a need for them again in the future, so the information is quite helpful. Thank, Greg.

I would like to do some podcasting, what mic do you use to pickup your voice? Sounds GREAT!

@theaudioanalyst

3 жыл бұрын

I'm currently using the Sonic Presence SP15 - www.sonicpresence.com/

Greg - Great job on these videos! Must have been a particularly strong martini in this episode... in the first wiring diagram at 7:37 you have the red and black polarity colors reversed from the standard, while the others shown later have it correct. Keep up the good work!

@theaudioanalyst

3 жыл бұрын

Hello Bill K. Thanks for the good catch on that wiring diagram. First, understand that I did not create that graphic, but have used publicly available wiring diagrams to illustrate my examples. Also, while you are correct that the color coding seems to be reversed, with black for the positive lines and red for the negative lines, all the polarities are shown correctly. In other words, plus terminals are being shown going to plus terminals, and negative terminals are shown going to negative terminals. But, they show the negative runs in red, and the positive runs in black. Interesting, and slightly confusing, but still accurate other than the color coding... 😉 P.S. - all my martinis are particularly strong! 🤣

@Bill.K

3 жыл бұрын

@@theaudioanalyst Absolutely, it's just the color coding that's inconsistent with the standard. The connections shown are all correct as you stated so it's not really a big deal. All the best! - Bill

@marcus1970

3 жыл бұрын

@@Bill.K the colour coding on Greg's Olives looks spot on though.

Thanks for the recommendation of the Audioquest metal body splitter. Just received and they work great.

Another highly instructive vid, Greg. Nicely organized and executed, with fine production values. Next up: you and I talk about Martini recipes via phone! 😎

@theaudioanalyst

3 жыл бұрын

Hello Dr. R. Thank you so very much for your kind words of support and approval. From a cat like you, such compliments must be taken as an indication that I am, at least to some degree, realizing my goals with the channel. As to my martini recipe, see Sir Winston Churchill's advice...with slight alterations. I prefer to use Hendricks, I eschew the use of ice entirely, choosing to keep my gin in the freezer, and I affirm Sir Churchill's aversion to vermouth! 😊 And, I owe you a call. I tried to return your call the day after I helped my colleague install his Martin Logan Dynamo 1100X subwoofer, but you were unavailable. I'll try again this week, sir!