Power Considerations - Revision history

ST: /* Power Conditioning */

2021-05-08T17:15:50Z

Power Conditioning

← Older revision		Revision as of 17:15, 8 May 2021
Line 57:		Line 57:

	== Power Conditioning ==		== Power Conditioning ==
	We do not recommend external voltage regulators because we found that in many cases they cause more harm than help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.		We do not recommend external voltage regulators<ref>More about [https://voltonix.com/blog/power-conditioner-vs-voltage-regulator/ Power Conditioner vs Voltage Regulator]</ref> because we found that in many cases they cause more harm than help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.
	<!--		<!--
	The {{L1}} is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.		The {{L1}} is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.
Line 74:		Line 74:

	Reviewed with L1® Support June 16, 2014 [[User:ST\|ST]] 11:27, 16 June 2014 (EDT)		Reviewed with L1® Support June 16, 2014 [[User:ST\|ST]] 11:27, 16 June 2014 (EDT)


	== Background Information ==		== Background Information ==

ST: /* Power Strips */

2019-05-27T22:54:13Z

Power Strips

← Older revision		Revision as of 22:54, 27 May 2019
Line 52:		Line 52:

	=== Power Strips ===		=== Power Strips ===
	There is no technical reason why a power strip, a power cord or any sort of power conditioner should make a difference. Our system (and many others too) are designed to deal with all sorts of AC power fluctuation and have high-quality internal regulators. These regulate with much higher precision than any external device could do anyway, so "conditioning" or "cleaning" up the AC power doesn't make any audible difference whatsoever.		There is no technical reason why a power strip, a power cord or any sort of power conditioner should make a difference [to the sound or your system]. Our system (and many others too) are designed to deal with all sorts of AC power fluctuation and have high-quality internal regulators. These regulate with much higher precision than any external device could do anyway, so "conditioning" or "cleaning" up the AC power doesn't make any audible difference whatsoever.

	Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/3741002612?r=7361012712#7361012712 Hilmar-at-Bose]		Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/3741002612?r=7361012712#7361012712 Hilmar-at-Bose]

ST: /* Surge Protectors */

2019-05-27T22:19:56Z

Surge Protectors

← Older revision		Revision as of 22:19, 27 May 2019
Line 30:		Line 30:
	From Hilmar-at-Bose		From Hilmar-at-Bose

	Surge protectors are not a bad thing, although the Power Stands for the {{L1}} Classic, Model I, Model 1S, Model II and Compact have built in surge protection.		Surge protectors are not a bad thing, although the Power Stands for the {{L1}} Classic, Model I, Model 1S, Model II and Compact have built-in surge protection.

	"Surge" means a lot of voltage coming through the power over a short period of time. That's pretty rare and the main cause is lightning, some accidents involving power lines (mostly on poles) being cut and touching something they shouldn't (e.g. the wrong side of a power transformer) and some really big compressors (e.g. industrial-sides freezers or fridges) turning on or off.		"Surge" means a lot of voltage coming through the power over a short period of time. That's pretty rare and the main cause is lightning, some accidents involving power lines (mostly on poles) being cut and touching something they shouldn't (e.g. the wrong side of a power transformer) and some really big compressors (e.g. industrial-sides freezers or fridges) turning on or off.
Line 36:		Line 36:
	With the exception of lightning and some very bad power accidents, the Power Stand can handle that all fine by itself. With lightning, anything is possible. No piece of equipment that I know will survive a direct hit into a directly connected power line. But then again lightning might strike a few blocks (and transformers) away in which case a surge protector might be able to take the first hit and die quickly enough to protect the attached equipment.		With the exception of lightning and some very bad power accidents, the Power Stand can handle that all fine by itself. With lightning, anything is possible. No piece of equipment that I know will survive a direct hit into a directly connected power line. But then again lightning might strike a few blocks (and transformers) away in which case a surge protector might be able to take the first hit and die quickly enough to protect the attached equipment.

	In this regard even cheap surge protectors will work fairly well and there is only a really small number of cases where a cheap and very expensive surge protector might make a difference.		In this regard, even cheap surge protectors will work fairly well and there is only a really small number of cases where a cheap and very expensive surge protector might make a difference.

	On a side note, its a good idea to have all equipment that connects to the Power Stand on the same power strip. That helps with ground loops. On the other hand it's not a good idea to turn things on and off with the switch on the power strip. That may cause your fuse to blow (due to the so-called "in-rush current") and might result in pops and clicks.		On a side note, its a good idea to have all equipment that connects to the Power Stand on the same power strip. That helps with ground loops. On the other hand it's not a good idea to turn things on and off with the switch on the power strip. That may cause your fuse to blow (due to the so-called "in-rush current") and might result in pops and clicks.
Line 42:		Line 42:
	The proper way to turn things on is to follow the signal, i.e.		The proper way to turn things on is to follow the signal, i.e.

	# ~~instruments~~		# Instruments
	# ~~outboard~~ effects processors		# Outboard effects processors
	# Power Stand		# Power Stand
	# ~~external~~ power amps (e.g. third party power amps)		# External power amps (e.g. third-party power amps)

	~~Turning~~ off ~~be done~~ in reverse.		Turn off in the reverse order.

	Source: [~~http~~://~~bose~~.~~infopop~~.cc/~~eve~~/~~forums~~/a/~~tpc/f/3976055944/m/3741002612~~?r=~~7361012712~~#~~7361012712~~ Hilmar-at-Bose]		Source: [https://www.bosepro.community/g/portable/topic/high-end-power-strips?reply=18197182791882303#18197182791882303 Hilmar-at-Bose]

	=== Power Strips ===		=== Power Strips ===
	There is no technical reason why a power strip, a power cord or any sort of power conditioner should make a difference. Our system (and many others too) are designed to deal with all sorts of AC power fluctuation and have high quality internal regulators. These regulate with much higher precision ~~that~~ any external device could do anyway, so "conditioning" or "cleaning" up the AC power doesn't make any audible difference whatsoever.		There is no technical reason why a power strip, a power cord or any sort of power conditioner should make a difference. Our system (and many others too) are designed to deal with all sorts of AC power fluctuation and have high-quality internal regulators. These regulate with much higher precision than any external device could do anyway, so "conditioning" or "cleaning" up the AC power doesn't make any audible difference whatsoever.

	Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/3741002612?r=7361012712#7361012712 Hilmar-at-Bose]		Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/3741002612?r=7361012712#7361012712 Hilmar-at-Bose]

ST at 22:10, 27 May 2019

2019-05-27T22:10:17Z

← Older revision		Revision as of 22:10, 27 May 2019
Line 1:		Line 1:
	{{Model II icon}}{{Model 1S icon}}{{Model I icon}}{{Classic icon}}		{{Model II icon}}{{Model 1S icon}}{{Compact icon}}{{F1 icon}}{{Model I icon}}{{Classic icon}}
	~~<table><tr>~~
	<~~td valign~~="~~top" width="250~~">__TOC__</td>		<div class="tocdiv">
	<~~td valign="top"~~><br><br>This information pertains to AC power sources for your {{~~Classic~~}}, {{Model I}}, {{~~Model 1S~~}}, {{Model II}}.		<div>__TOC__</div>
	~~<!--~~		<div><h2>Introduction</h2>
	Reviewed and updated ~~June 16~~, ~~2014~~.		This information pertains to AC power sources for your {{Model II}}, {{Model 1S}}, {{Compact}}, {{F1}}, {{Classic}}, {{Model I}}
	~~-->~~
	</td>		Reviewed and updated May 27, 2019.
	</~~tr></table~~>
			</div>
			</div>

	== Electrical Power ==		== Electrical Power ==
	As a general note, we want to remind you that all electrical equipment must deal with poor power conditions and power outages. Hardware and software designs can be sophisticated in this regard and we put enormous effort in this area.		As a general note, we want to remind you that all electrical equipment must deal with poor power conditions and power outages. Hardware and software designs can be sophisticated in this regard and we put enormous effort in this area.

ST at 08:51, 27 May 2019

2019-05-27T08:51:10Z

← Older revision		Revision as of 08:51, 27 May 2019
Line 2:		Line 2:
	<table><tr>		<table><tr>
	<td valign="top" width="250">__TOC__</td>		<td valign="top" width="250">__TOC__</td>
	<td valign="top"><br><br>This information pertains to AC power sources for your ~~{{L1}}~~ {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.		<td valign="top"><br><br>This information pertains to AC power sources for your {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}.
			<!--
			Reviewed and updated June 16, 2014.
			-->
	</td>		</td>
	</tr></table>		</tr></table>

ST at 08:49, 27 May 2019

2019-05-27T08:49:39Z

← Older revision		Revision as of 08:49, 27 May 2019
Line 69:		Line 69:

	Reviewed with L1® Support June 16, 2014 [[User:ST\|ST]] 11:27, 16 June 2014 (EDT)		Reviewed with L1® Support June 16, 2014 [[User:ST\|ST]] 11:27, 16 June 2014 (EDT)


			== Background Information ==

			The following is from [https://www.bosepro.community/g/portable/topic/power-conditioners-are-paramount?reply=18197182791656589#18197182791656589 a discussion with MikeZ-at-Bose]

			The power regulator/supply in the L1 takes in the AC wall voltage, whatever it is, and converts it down to much lower DC voltages to run the preamps, DSP's etc. As long as wall voltage is within the range I quoted earlier (90V-135V), the DC voltages that the preamps and DSP's see do not change. As part of the process of converting from AC to DC the power is also filtered. No matter what happens at the wall, the audio portions just see clean DC power. When the voltage goes outside the bounds, the unit just shuts down gracefully.

			<blockquote>
			That's o.k. I like the engineering talk and thanks for your time. : )

			I would love to know more about how it works if you have the time, cuz it sounds like you're telling me that in addition to a mixer section and power amps, the L1 base also houses a full voltage regulator and conditioner?

			How does it work? Are you using a step-up transformer to regulate voltage? The reason I ask is because the process of simply converting AC to DC is a pretty common practice. : ) There are also many computer power supplies that use the conversion as a cleaning process, but that doesn't mean that the computer doesn't perform better from clean, consistent power.

			My toaster is designed to work within a voltage range, since 110v is never guaranteed from your wall. So, I'm curious because I must just not understand. I wish I knew more about the engineering aspect of it. I can only report the facts of what I (and others) hear. Anyway, If you have the time, or the notion....I would be interested in a more in depth description. : ) Thanks

			</blockquote>

			So first, why do we need power regulation or conditioning anyway?...

			I just re-read your post and Im glad you mentioned the toaster! The toaster is like most electrical appliances in the world - it isn't very picky about it's power - and we would never notice the difference in performance. All the toaster does is take wall voltage and feed it to the heating element (the portion that glows red). If the wall voltage dips to 100, the power to the element drops proportionally. The toast will toast maybe ~18% slower in this extreme case. Noise on the AC line would have little effect on the element- the element takes a long time to heat up and cool down compared to the speed of the power changes, so it won't care about momentary dips. For example, if a refrigerator kicked in in a poorly wired house, the power may go down to 80V for a tenth of a second. The temperature of the element probably would not change measurably, and the end product (toast) would definitely not suffer.

			With audio equipment, we are using our ears to judge the results. We're going to hear and care about sudden dips and changes in wall voltage, unless we regulate the power.

			Digital equipment, like a computer, relies on constant voltage levels inside it's microchips to operate. These voltage levels (usually around 3.3 volts DC, or less) dictate the 'ons' and 'offs' at the heart of these devices. If the voltage goes outside a very narrow range, the digital does not degrade it's performance - it just ceases to operate.

			The L1 has both analog audio portions (preamps, power amps), and digital portions (ToneMatch EQ's, effects in the T1, etc). Both of these portions rely on regulated, constant power to operate well. In the case of the digital portions, it relies on this constant supply of power to operate at all.

			The power needed inside the L1 is DC. The amplifiers need around +/- 30V DC, the preamps need around +/- 18V DC, and the DSP's less than 5V.

			How's it work?

			The L1 uses a low noise switched-mode power supply. These are very light and efficient. Here's an article on how they work: http://en.wikipedia.org/wiki/Switched-mode_power_supply . In a switched mode supply (or switcher), the DC voltage is created from AC by rapidly switching a transistor on and off. The average of these on and off times, after a lot of filtering, becomes the DC voltage (pictures are in the wikipedia article). Regulation is done by varying the amount of the time the transistor is on and off. The switching occurs very fast, always more than 30,000 times per second. Sometimes much more. Switchers are an abstract concept and there isn't really a good analogy that I can think of for how they work.

			For our supplies, there is a lot of extra filtering and tighter than usual regulation to make sure none of the artifacts from the wall power are audible. This is a major part of the product's design, and the focus of a lot of testing.

			For some more reading on power supplies in general: http://en.wikipedia.org/wiki/Power_supply

			Hope this is helpful and answers your questions

			MikeZ-at-Bose

			Source: [https://www.bosepro.community/g/portable/topic/power-conditioners-are-paramount?reply=18197182791656589#18197182791656589 MikeZ-at-Bose]

ST: /* Power Conditioning */

2018-10-09T17:26:29Z

Power Conditioning

← Older revision		Revision as of 17:26, 9 October 2018
Line 52:		Line 52:

	== Power Conditioning ==		== Power Conditioning ==
	We do not recommend external voltage regulators because we found that in many cases they cause more harm ~~then~~ help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.		We do not recommend external voltage regulators because we found that in many cases they cause more harm than help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.
			<!--
	The {{L1}} is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.		The {{L1}} is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.
			-->

	Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9251094154?r=1431066154#1431066154 Hilmar-at-Bose]		Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9251094154?r=1431066154#1431066154 Hilmar-at-Bose]

ST at 15:29, 16 June 2014

2014-06-16T15:29:11Z

← Older revision		Revision as of 15:29, 16 June 2014
Line 2:		Line 2:
	<table><tr>		<table><tr>
	<td valign="top" width="250">__TOC__</td>		<td valign="top" width="250">__TOC__</td>
	<td valign="top">This information pertains to AC power sources for your {{L1}} {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.		<td valign="top"><br><br>This information pertains to AC power sources for your {{L1}} {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.

	</td>		</td>

ST at 15:28, 16 June 2014

2014-06-16T15:28:52Z

← Older revision		Revision as of 15:28, 16 June 2014
Line 1:		Line 1:
	{{Model II icon}}{{Model 1S icon}}{{Model I icon}}{{Classic icon}}This information pertains to AC power sources for your {{L1}} {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.		{{Model II icon}}{{Model 1S icon}}{{Model I icon}}{{Classic icon}}
			<table><tr>
			<td valign="top" width="250">__TOC__</td>
			<td valign="top">This information pertains to AC power sources for your {{L1}} {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.

			</td>
			</tr></table>
	== Electrical Power ==		== Electrical Power ==
	As a general note, we want to remind you that all electrical equipment must deal with poor power conditions and power outages. Hardware and software designs can be sophisticated in this regard and we put enormous effort in this area.		As a general note, we want to remind you that all electrical equipment must deal with poor power conditions and power outages. Hardware and software designs can be sophisticated in this regard and we put enormous effort in this area.

ST: Reviewed with Bose

2014-06-16T15:27:53Z

Reviewed with Bose

← Older revision		Revision as of 15:27, 16 June 2014
Line 1:		Line 1:
	This information pertains to AC power sources for your ~~L1®~~.		{{Model II icon}}{{Model 1S icon}}{{Model I icon}}{{Classic icon}}This information pertains to AC power sources for your {{L1}} {{Classic}}, {{Model I}}, {{Model 1S}}, {{Model II}}. Reviewed and updated June 16, 2014.

	== Electrical Power ==		== Electrical Power ==
Line 20:		Line 20:
	From Hilmar-at-Bose		From Hilmar-at-Bose

	Surge protectors are not a bad thing, although the ~~PS1 (as well as~~ the L1 Model I, Model 1S, Model II, and ~~all our other products)~~ have built in surge protection.		Surge protectors are not a bad thing, although the Power Stands for the {{L1}} Classic, Model I, Model 1S, Model II and Compact have built in surge protection.

	"Surge" means a lot of voltage coming through the power over a short period of time. That's pretty rare and the main cause is lightning, some accidents involving power lines (mostly on poles) being cut and touching something they shouldn't (e.g. the wrong side of a power transformer) and some really big compressors (e.g. industrial-sides freezers or fridges) turning on or off.		"Surge" means a lot of voltage coming through the power over a short period of time. That's pretty rare and the main cause is lightning, some accidents involving power lines (mostly on poles) being cut and touching something they shouldn't (e.g. the wrong side of a power transformer) and some really big compressors (e.g. industrial-sides freezers or fridges) turning on or off.

	With the exception of lightning and some very bad power accidents, the ~~PS1~~ can handle that all fine by itself. With lightning, anything is possible. No piece of equipment that I know will survive a direct hit into a directly connected power line. But then again lightning might strike a few blocks (and transformers) away in which case a surge protector might be able to take the first hit and die quickly enough to protect the attached equipment.		With the exception of lightning and some very bad power accidents, the Power Stand can handle that all fine by itself. With lightning, anything is possible. No piece of equipment that I know will survive a direct hit into a directly connected power line. But then again lightning might strike a few blocks (and transformers) away in which case a surge protector might be able to take the first hit and die quickly enough to protect the attached equipment.

	In this regard even cheap surge protectors will work fairly well and there is only a really small number of cases where a cheap and very expensive surge protector might make a difference.		In this regard even cheap surge protectors will work fairly well and there is only a really small number of cases where a cheap and very expensive surge protector might make a difference.

	On a side note, its a good idea to have all equipment that connects to the ~~PS1~~ on the same power strip. That helps with ground loops. On the other hand it's not a good idea to turn things on and off with the switch on the power strip. That may cause your fuse to blow (due to the so-called "in-rush current") and might result in pops and clicks.		On a side note, its a good idea to have all equipment that connects to the Power Stand on the same power strip. That helps with ground loops. On the other hand it's not a good idea to turn things on and off with the switch on the power strip. That may cause your fuse to blow (due to the so-called "in-rush current") and might result in pops and clicks.

	The proper way to turn things on is to follow the signal, i.e.		The proper way to turn things on is to follow the signal, i.e.
Line 34:		Line 34:
	# instruments		# instruments
	# outboard effects processors		# outboard effects processors
	# ~~PS1~~		# Power Stand
	# external power amps		# external power amps (e.g. third party power amps)

	Turning off be done in reverse.		Turning off be done in reverse.
Line 49:		Line 49:
	We do not recommend external voltage regulators because we found that in many cases they cause more harm then help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.		We do not recommend external voltage regulators because we found that in many cases they cause more harm then help. The amps and power supplies in the L1 use highly efficient switching technology, Many voltage regulators are not a good fit for this technology since they are simply not fast enough.

	The L1 is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.		The {{L1}} is designed to be quite resistant against any AC voltage swings and will operate fine even down at 97 Volts.

	Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9251094154?r=1431066154#1431066154 Hilmar-at-Bose]		Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9251094154?r=1431066154#1431066154 Hilmar-at-Bose]
Line 61:		Line 61:

	Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/8291078355?r=7061098355#7061098355 Bill-at-Bose] [[User:ST\|ST]] 09:09, 12 August 2008 (EDT)		Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/8291078355?r=7061098355#7061098355 Bill-at-Bose] [[User:ST\|ST]] 09:09, 12 August 2008 (EDT)

			Reviewed with L1® Support June 16, 2014 [[User:ST\|ST]] 11:27, 16 June 2014 (EDT)