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Author Topic: new portable pre..swappable Op-amps?  (Read 775 times)

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Offline muj

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Re: new portable pre..swappable Op-amps?
« Reply #1 on: August 03, 2018, 06:47:33 AM »

"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!?
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Offline Hypnocracy

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Re: new portable pre..swappable Op-amps?
« Reply #2 on: August 03, 2018, 02:06:53 PM »
Quote
External universal AC input SMPS power supply (90-264 VAC), eliminates potential transformer hum

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

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Re: new portable pre..swappable Op-amps?
« Reply #3 on: August 03, 2018, 05:28:02 PM »
Quote
External universal AC input SMPS power supply (90-264 VAC), eliminates potential transformer hum

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

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

Offline H₂O

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Re: new portable pre..swappable Op-amps?
« Reply #4 on: August 07, 2018, 11:38:16 AM »
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


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.
« Last Edit: August 07, 2018, 11:44:19 AM by H₂O »
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