B1 Bass Module: Difference between revisions

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== Two B1s ==

{{Classic icon}}{{Model I icon}}{{Model II icon}} The Classic / Model I / Model II output for the B1s is

{{Classic icon}}{{Model I icon}}{{Model II icon}} The Classic / Model I / Model II / Model 1S output for the B1s is

*125 Watts into 8 ohms (single B1)

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*you look only at relatively low frequencies

Then you get ~~6dB~~ more sound pressure level (SPL) from 2 as compared to one.

Then you get +6 dB more sound pressure level (SPL) from 2 as compared to one.

Our B1 is a good example ~~for~~ that:

Our B1 is a good example of that:

*2 B1s give 6 dB more than one.

*You gain 3 dB by ~~simple~~ doubling the electrical power (250 Watt for two, 125 Watt for one).

*You gain 3 dB by simply doubling the electrical power (250 Watt for two, 125 Watt for one).

*The other 3 dB ~~are~~ gained by doubling of acoustic volume, cone area and close coupling between the speakers.

*The other 3 dB is gained by doubling of acoustic volume, cone area and close coupling between the speakers.

To get the same SPL (as 2 B1s) from a single B1 you would actually have to hit it with four times the power (500 Watt).

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...

:We have carefully voiced the system to have the "best" spectral balance. Ideally, this spectral should not change, no matter how many bass modules are attached. More bass modules simply allow you to play louder and have more headroom. Adding the second B1 will not change the spectral balance but play louder.

The PS1 senses how many B1 bass modules are attached (0***, 1 or 2) and adjusts the internal EQ accordingly. In the case of attaching the second B1 the ~~PS1~~ will drop the bass level by about 6 dB so that the overall acoustic output stays the same.

The PS1 senses how many B1 bass modules are attached (0***, 1 or 2) and adjusts the internal EQ accordingly. In the case of attaching the second B1 the Power Stand will drop the bass level by about 6 dB so that the overall acoustic output stays the same.

:You can actually notice the change: When you attach (or detach) the second B1, the systems mutes for about a second, adjust its EQ and then comes back again. That's perfectly safe to do while the system is playing.

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Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/1506041054/m/251104076?r=406104076#406104076 Hilmar-at-Bose replies to Single or Double Bass...] discussion in the {{forum}}

*** not applicable to Model II or Model 1S - both must use at least on Bass module.

*** not applicable to Model II or Model 1S - both must use at least one Bass module.

@@ Line 30: / Line 30: @@
 == Two B1s  ==
 <section begin=TwoB1s />
-{{Classic icon}}{{Model I icon}}{{Model II icon}} The Classic / Model I / Model II output for the B1s is
+{{Classic icon}}{{Model I icon}}{{Model II icon}} The Classic / Model I / Model II / Model 1S output for the B1s is
 *125 Watts into 8 ohms (single B1)
@@ Line 43: / Line 43: @@
 *you look only at relatively low frequencies
-Then you get 6dB more sound pressure level (SPL) from 2 as compared to one.
+Then you get +6 dB more sound pressure level (SPL) from 2 as compared to one.
-Our B1 is a good example for that:
+Our B1 is a good example of that:
 *2 B1s give 6 dB more than one.
-*You gain 3 dB by simple doubling the electrical power (250 Watt for two, 125 Watt for one).
+*You gain 3 dB by simply doubling the electrical power (250 Watt for two, 125 Watt for one).
-*The other 3 dB are gained by doubling of acoustic volume, cone area and close coupling between the speakers.
+*The other 3 dB is gained by doubling of acoustic volume, cone area and close coupling between the speakers.
 To get the same SPL (as 2 B1s) from a single B1 you would actually have to hit it with four times the power (500 Watt).
@@ Line 60: / Line 60: @@
 ...
 :We have carefully voiced the system to have the "best" spectral balance. Ideally, this spectral should not change, no matter how many bass modules are attached. More bass modules simply allow you to play louder and have more headroom. Adding the second B1 will not change the spectral balance but play louder.
-The PS1 senses how many B1 bass modules are attached (0***, 1 or 2) and adjusts the internal EQ accordingly. In the case of attaching the second B1 the PS1 will drop the bass level by about 6 dB so that the overall acoustic output stays the same.
+The PS1 senses how many B1 bass modules are attached (0***, 1 or 2) and adjusts the internal EQ accordingly. In the case of attaching the second B1 the Power Stand will drop the bass level by about 6 dB so that the overall acoustic output stays the same.
 :You can actually notice the change: When you attach (or detach) the second B1, the systems mutes for about a second, adjust its EQ and then comes back again. That's perfectly safe to do while the system is playing.
@@ Line 67: / Line 67: @@
 Source: [http://bose.infopop.cc/eve/forums/a/tpc/f/1506041054/m/251104076?r=406104076#406104076 Hilmar-at-Bose replies to Single or Double Bass...] discussion in the {{forum}}
-*** not applicable to Model II or Model 1S - both must use at least on Bass module.
+*** not applicable to Model II or Model 1S - both must use at least one Bass module.
 <section end=TwoB1s />