T1 ToneMatch® Audio Engine: Difference between revisions

Line 63:

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.

== Inputs ==

The following notes about Channels 1,2,3, 4/5 are from Hilmar-at-Bose spread out over several posts in [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5031050644?r=2981027944#2981027944 Information on the new T1 ToneMatch audio engine]

Channels 1,2,3 support

* Balanced XLR

* Unbalanced Tip-Sleeve

The Tip-Sleeve inputs are high impedance so you can plug in an acoustic guitar with passive piezo pickup or any other passive instrument directly without a pre-amp. Input impedance on Channels 1,2,3 is about 1 MOhm. Channels 4 and 5 have an input impedance of about 10 kOhm.

:Choosing the "best" input impedance is a little bit of a trade off and matching the pickup's impedance is not necessarily the best choice.

* Piezo pickups are also somewhat of a capacitor and together with the input impedance of the preamp, this forms a low pass filter.

* If the impedance is too low, then the low pass filter is in the audible range and the guitar looses sparkle and gets a little dull.

* If the impedance is too high, the system gets noisy and somewhat sensitive and finicky. For example, stepping on or simply moving a cable changes it's capacitance which creates clearly audible artifacts with a very high input impedance.

* We feel, that 1 MOhm is a very good compromise for a life application.

@@ Line 63: / Line 63: @@
 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.
+== Inputs ==
+The following notes about Channels 1,2,3, 4/5 are from Hilmar-at-Bose spread out over several posts in [http://bose.infopop.cc/eve/forums/a/tpc/f/7521050644/m/5031050644?r=2981027944#2981027944 Information on the new T1 ToneMatch audio engine]
+Channels 1,2,3 support
+* Balanced XLR
+* Unbalanced Tip-Sleeve
+The Tip-Sleeve inputs are high impedance so you can plug in an acoustic guitar with passive piezo pickup or any other passive instrument directly without a pre-amp. Input impedance on Channels 1,2,3 is about 1 MOhm. Channels 4 and 5 have an input impedance of about 10 kOhm.
+:Choosing the "best" input impedance is a little bit of a trade off and matching the pickup's impedance is not necessarily the best choice.
+* Piezo pickups are also somewhat of a capacitor and together with the input impedance of the preamp, this forms a low pass filter.
+* If the impedance is too low, then the low pass filter is in the audible range and the guitar looses sparkle and gets a little dull.
+* If the impedance is too high, the system gets noisy and somewhat sensitive and finicky. For example, stepping on or simply moving a cable changes it's capacitance which creates clearly audible artifacts with a very high input impedance.
+* We feel, that 1 MOhm is a very good compromise for a life application.