Gear / Technical Help > Battery Boxes, Preamps, Mixers, ADCs, and Processors

new portable pre..swappable Op-amps?

(1/1)

muj:
http://www.integeraudio.com/mp2-details.html

morst:

"A square wave is a very good test of an amplifier's overall system response and accuracy.  The screen shots below from the Integer RMP2 illustrate both."


also it never occurs in music, so good luck there!?

Hypnocracy:

--- Quote ---External universal AC input SMPS power supply (90-264 VAC), eliminates potential transformer hum
--- End quote ---

Wil we have to have a wall outlet near by to run this thing?

intaud:

--- Quote from: Hypnocracy on August 03, 2018, 02:06:53 PM ---
--- Quote ---External universal AC input SMPS power supply (90-264 VAC), eliminates potential transformer hum
--- End quote ---

Wil we have to have a wall outlet near by to run this thing?

--- End quote ---

Just curious what people think about the following as a portable power solution for this type of thing?

https://www.amazon.com/Portable-TSA-approved-Jackery-PowerBar-20800mAh/dp/B076DXWPHS/ref=cm_cr_arp_d_product_top?ie=UTF8

H₂O:

--- Quote from: intaud on August 03, 2018, 05:28:02 PM ---Just curious what people think about the following as a portable power solution for this type of thing?

https://www.amazon.com/Portable-TSA-approved-Jackery-PowerBar-20800mAh/dp/B076DXWPHS/ref=cm_cr_arp_d_product_top?ie=UTF8

--- End quote ---


It may work but it may introduce noise to the recording.  Low end DC to AC inverters don't output true sign wave AC signals which may lead to noise in the output of the AC device.


When stepping voltage up you need a switching dc-dc converter design which requires an oscillator (not to mention the DC to AC step - which could use the same oscillating section), this oscillator will add noise (and depending on the frequency and filtering circuit) may be audible. 


It all is in how the circuit was designed - lower cost typically leads to a poorer designed circuit and lower quality parts which equate to a greater chance of audible noise or other issues.

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