String Quartet - BUN

Hi BUN,

Thanks for using The Sketcher! Here is your Sketch.



-- click image to make changes to the live version --

Legend:
L1® Compact
Orange numbers are Systems and Inputs using those Systems.
Green numbers are for general notes about the Sketch and connections to non-Bose gear.

Quoting BUN from The Sketcher
quote:
String Quartet:

- Violin #1
- Violin #2
- Cello #3
- Viola #4(viola picture does not exist...)

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Photos (1)
Original Post
Hi ST,
Not sure if you can help.

At first I was thinking to use Compact for amplifying my string quartet but after trial the conclusion is no.

Tried also L1 M2 with my acoustic violin and I was much happier about the sound with this system. We are using DPA 4061 miniature mics for each 4 instruments.

As T1 ToneMatch has only 3 XLR inputs my 2 question are:
1. Is there a new T2 ToneMatch on the way with more XLR inputs (it's 4 years old)?
2. If not would DPA 4061 work in input 4/5 with XLR to TS or TRS adaptor (I did not try this in the shop...)?
PS: I have external phantom power for 4th mic.

Thanks
Hi BUN,

Thank you for joining the Forum.

quote:
Originally posted by BUN:
Hi ST,
Not sure if you can help.

At first I was thinking to use Compact for amplifying my string quartet but after trial the conclusion is no.

Tried also L1 M2 with my acoustic violin and I was much happier about the sound with this system. We are using DPA 4061 miniature mics for each 4 instruments.

As T1 ToneMatch has only 3 XLR inputs my 2 question are:
1. Is there a new T2 ToneMatch on the way with more XLR inputs (it's 4 years old)?

I don't know the answer to this question but Bose never comments on products that are in development.

quote:


2. If not would DPA 4061 work in input 4/5 with XLR to TS or TRS adaptor (I did not try this in the shop...)?
PS: I have external phantom power for 4th mic.

You will just have to try this and let us know how it goes. The gain structure is different on Channel 4/5 from Channels 1,2,3. The input sensitivity is higher with Channels 1,2,3 and you may need another preamp to get the signal up where you need it on Channel 4/5.

I may have all the bits an pieces around here to give this a shot. I'll be back in a little while to tell you how it worked at this end.

quote:



Thanks


You are welcome.

In the meantime, here are some notes for you.

L1® Model II in the wiki

T1 ToneMatch® Audio Engine
Hi BUN,

Success!

I just tried this out.

Small diaphragm condenser microphone

to

external phantom power supply

to

a low to high impedance matching transformer for the microphone
(click the picture for details)


to

T1® Channel 4/5

I had to turn the input trim higher on Channel 4/5 than when I plugged the microphone directly into Channel 1,2,3 - but it worked.

NOTE - you have to have the impedance matching transformer.

Does that help?
Thanks a million ST for all the information.

I was thinking I will need perhaps mic preamp to plug DPA mic to 4/5 channel but the impedance matching transformer makes it easier.

The question is:
DPA 4061 has 30-40 Ohm output impendance and T1® channels 4/5 have an input impedance of about 10 kOhm - do I need to shop for specific ratio to match exactly this?

Thanks
Hi BUN,

quote:
I was thinking I will need perhaps mic preamp to plug DPA mic to 4/5 channel but the impedance matching transformer makes it easier.


While a mic preamp (a good one) may help, if you don't already have one, I would try the impedance matching transformer.

quote:
DPA 4061 has 30-40 Ohm output impendance and T1® channels 4/5 have an input impedance of about 10 kOhm - do I need to shop for specific ratio to match exactly this?

I don't think you need to shop for something that actually matches the specifications.

It looks like you are on the right of the tolerances on both sides of the impedance matching transformer.

Here's an article that may shed some light on this.

http://www.deltamedia.com/resource/impedance.html
Thanks again ST for all your help,
I hope BOSE is keeping eye at this and will introduce T2® ToneMatch with 4 XLR inputs not just for my configuration but also for barbershop quartets, saxophone quartets, clarinet quartets, cello quartets, wind qurtets... I could continue forever.
That's what I was thinking about.

Meanwhile I got the L1 M2 with T1. I could not longer wait for T2 ToneMatch.

4th mic is working fine in line input 4/5 but it is not ideal.

I bealive it is a great system and it would be better with extra XLR input.

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