T1 ToneMatch® Audio Engine: Difference between revisions

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<td valign="top">[[Image:005 Bose T1.gif|Bose T1™]]

''' <big>~~Download the Latest Firmware and Updates~~ </big>'''

''' <big>Downloads</big>'''

** [[L1™ Model II Power Stand Firmware Updates]] - includes bug fixes

** [[T1 ToneMatch™ Audio Engine Firmware Updates]] - includes bug fixes

* [[Presets/ToneMatch™/Downloads|ToneMatch™ Presets for the T1™]]

[http://bose.infopop.cc/eve/forums/a/tpc/f/8221072574/m/5791097384 T1™ and L1™ Firmware]

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A really helpful feature on the T1 is to go to the Prefs/Output Level menu, and see where you are relative to maximum output.

~~== Preamps ==~~

~~=== Comparison to Model I and Classic ===~~

~~MikeZ-at-Bose tells us:<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>~~

~~... (the preamps on the Model I are)... exactly the same as the Classic.~~

~~On the {{T1}} they're different, but are designed to the same standard as the {{Classic}} preamps.~~

~~Functionally they are basically the same in terms of frequency response, input impedance, noise performance, max gains etc.~~

The difference comes in how we get there. I'll try not to go into horribly boring detail. The name of the game is trade offs, and in the end the design constraints dictate the *best* type of circuit used for *this* particular situation. Here are a couple of the many factors that dictate the differences:

Gain structure. The internal components of the {{T1}} are different that the {{Model I}} / {{Classic}} and need to have signals fed to them in certain ways. Different designs are more suited to the levels needed than others.

~~Physical layout of the circuit on the board. There are four channels in a tighter space in the {{T1}}. Again, certain designs lend themselves to be better at this than others.~~

After evaluating all of the factors that go into the design of a preamp we are using another proven circuit that relies more on discrete transistors rather than op-amps. It fits our needs better for this design situation. The preamp design itself is not necessarily any better or worse. There are *many* ways to skin the cat of preamp design to achieve a desired performance.

~~Will it sound different? No...I certainly cannot hear a difference playing through it. Can't measure one either.~~

~~Hope this sheds some light on it.~~

~~MikeZ<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>~~

~~=== Preamps Out ===~~

~~[[Image:T1PreampsOut.png|thumb|right|image of T1™ rear pointing to Preamps out]]~~

The preamp outputs are before everything except the Trim control in the signal chain. - MikeZ-at-Bose<ref>MikeZ-at-Bose -[http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5891048364?r=3141068364#3141068364 T1™ Preamp Out Muting]</ref>. This means that these are post-trim, and nothing else (e.g. Muting) has any effect on the signal at the preamp outs.

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[[Image:T12ModelI.png]]

== Preamps ==

=== Comparison to Model I and Classic ===

MikeZ-at-Bose tells us:<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>

... (the preamps on the Model I are)... exactly the same as the Classic.

On the {{T1}} they're different, but are designed to the same standard as the {{Classic}} preamps.

Functionally they are basically the same in terms of frequency response, input impedance, noise performance, max gains etc.

The difference comes in how we get there. I'll try not to go into horribly boring detail. The name of the game is trade offs, and in the end the design constraints dictate the *best* type of circuit used for *this* particular situation. Here are a couple of the many factors that dictate the differences:

Gain structure. The internal components of the {{T1}} are different that the {{Model I}} / {{Classic}} and need to have signals fed to them in certain ways. Different designs are more suited to the levels needed than others.

Physical layout of the circuit on the board. There are four channels in a tighter space in the {{T1}}. Again, certain designs lend themselves to be better at this than others.

After evaluating all of the factors that go into the design of a preamp we are using another proven circuit that relies more on discrete transistors rather than op-amps. It fits our needs better for this design situation. The preamp design itself is not necessarily any better or worse. There are *many* ways to skin the cat of preamp design to achieve a desired performance.

Will it sound different? No...I certainly cannot hear a difference playing through it. Can't measure one either.

Hope this sheds some light on it.

MikeZ<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>

=== Preamps Out ===

[[Image:T1PreampsOut.png|thumb|right|image of T1™ rear pointing to Preamps out]]

The preamp outputs are before everything except the Trim control in the signal chain. - MikeZ-at-Bose<ref>MikeZ-at-Bose -[http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5891048364?r=3141068364#3141068364 T1™ Preamp Out Muting]</ref>. This means that these are post-trim, and nothing else (e.g. Muting) has any effect on the signal at the preamp outs.

=== Presets ===

* [[Presets/ToneMatch™/Downloads|ToneMatch™ Presets for the T1™]] (downloadable presets that are not installed at the factory)

* [[Presets (T1 ToneMatch)|T1 ToneMatch™ Presets]] (includes downloadable lists with cross-references to Version 2 presets).

== USB (Computer Interface) ==

@@ Line 5: / Line 5: @@
 <td valign="top">[[Image:005 Bose T1.gif|Bose T1™]]
-''' <big>Download the Latest Firmware and Updates </big>'''
+''' <big>Downloads</big>'''
+** [[L1™ Model II Power Stand Firmware Updates]] - includes bug fixes
+** [[T1 ToneMatch™ Audio Engine Firmware Updates]] - includes bug fixes
+* [[Presets/ToneMatch™/Downloads|ToneMatch™ Presets for the T1™]]
 [http://bose.infopop.cc/eve/forums/a/tpc/f/8221072574/m/5791097384 T1™ and L1™ Firmware]
@@ Line 51: / Line 56: @@
 A really helpful feature on the T1 is to go to the Prefs/Output Level menu, and see where you are relative to maximum output.
-== Preamps ==
-=== Comparison to Model I and Classic ===
-MikeZ-at-Bose tells us:<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>
-... (the preamps on the Model I are)...  exactly the same as the Classic.
-On the {{T1}} they're different, but are designed to the same standard as the {{Classic}} preamps.
-Functionally they are basically the same in terms of frequency response, input impedance, noise performance, max gains etc.
-The difference comes in how we get there. I'll try not to go into horribly boring detail. The name of the game is trade offs, and in the end the design constraints dictate the *best* type of circuit used for *this* particular situation. Here are a couple of the many factors that dictate the differences:
-Gain structure. The internal components of the {{T1}} are different that the {{Model I}} / {{Classic}} and need to have signals fed to them in certain ways. Different designs are more suited to the levels needed than others.
-Physical layout of the circuit on the board. There are four channels in a tighter space in the {{T1}}. Again, certain designs lend themselves to be better at this than others.
-After evaluating all of the factors that go into the design of a preamp we are using another proven circuit that relies more on discrete transistors rather than op-amps. It fits our needs better for this design situation. The preamp design itself is not necessarily any better or worse. There are *many* ways to skin the cat of preamp design to achieve a desired performance.
-Will it sound different? No...I certainly cannot hear a difference playing through it. Can't measure one either.
-Hope this sheds some light on it.
-MikeZ<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>
-=== Preamps Out ===
-[[Image:T1PreampsOut.png|thumb|right|image of T1™ rear pointing to Preamps out]]
-The preamp outputs are before everything except the Trim control in the signal chain. - MikeZ-at-Bose<ref>MikeZ-at-Bose -[http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5891048364?r=3141068364#3141068364  T1™ Preamp Out Muting]</ref>. This means that these are post-trim, and nothing else (e.g. Muting) has any effect on the signal at the preamp outs.
@@ Line 119: / Line 95: @@
 [[Image:T12ModelI.png]]
+== Preamps ==
+=== Comparison to Model I and Classic ===
+MikeZ-at-Bose tells us:<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>
+... (the preamps on the Model I are)...  exactly the same as the Classic.
+On the {{T1}} they're different, but are designed to the same standard as the {{Classic}} preamps.
+Functionally they are basically the same in terms of frequency response, input impedance, noise performance, max gains etc.
+The difference comes in how we get there. I'll try not to go into horribly boring detail. The name of the game is trade offs, and in the end the design constraints dictate the *best* type of circuit used for *this* particular situation. Here are a couple of the many factors that dictate the differences:
+Gain structure. The internal components of the {{T1}} are different that the {{Model I}} / {{Classic}} and need to have signals fed to them in certain ways. Different designs are more suited to the levels needed than others.
+Physical layout of the circuit on the board. There are four channels in a tighter space in the {{T1}}. Again, certain designs lend themselves to be better at this than others.
+After evaluating all of the factors that go into the design of a preamp we are using another proven circuit that relies more on discrete transistors rather than op-amps. It fits our needs better for this design situation. The preamp design itself is not necessarily any better or worse. There are *many* ways to skin the cat of preamp design to achieve a desired performance.
+Will it sound different? No...I certainly cannot hear a difference playing through it. Can't measure one either.
+Hope this sheds some light on it.
+MikeZ<ref>MikeZ-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/3651093054?r=1711028154#1711028154 talks about the preamps in the L1 Model I and the T1™ ]</ref>
+=== Preamps Out ===
+[[Image:T1PreampsOut.png|thumb|right|image of T1™ rear pointing to Preamps out]]
+The preamp outputs are before everything except the Trim control in the signal chain. - MikeZ-at-Bose<ref>MikeZ-at-Bose -[http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5891048364?r=3141068364#3141068364  T1™ Preamp Out Muting]</ref>. This means that these are post-trim, and nothing else (e.g. Muting) has any effect on the signal at the preamp outs.
+=== Presets ===
+* [[Presets/ToneMatch™/Downloads|ToneMatch™ Presets for the T1™]] (downloadable presets that are not  installed at the factory)
+* [[Presets (T1 ToneMatch)|T1 ToneMatch™ Presets]] (includes downloadable lists with cross-references to Version 2 presets).
 == USB (Computer Interface) ==