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Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
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Old 20th August 2019, 12:02 AM   #161
jwjarch is offline jwjarch  United States
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Join Date: Mar 2017
Location: San Leandro, CA
Just placed my pre-order as well! Thanks X!

xrk971 - 4 units - USA
pinnocchio - 2 units *Pre-order Placed*
Vunce - 2 units - USA *Pre-order Placed*
Miggie78 - 2 units - FINLAND
gary s - 4 units - AUSTRALIA *Pre-order Placed*
WTL- 2 units - AUSTRALIA *Pre-order Placed*
ppap64 - 2 units *Pre-order Placed*
drpro - 2 units - USA *Pre-order Placed*
Alarudin - 2 units - SINGAPORE
Ripcord - 2 units - USA
Myint67. - 4 units - Singapore (depends on price )
ravid - 2 units - India *Pre-order Placed*
darrr - 2 units - Poland *Pre-order Placed*
Avtech23 - 2 (maybe 4) units - Australia
necplusultra - 2 units - Dominion of Canada
gannaji - 4 units - USA
Amplitude - 2 units - Denmark
esprit - 2 units - UK
hirscwi - 4 units - USA
yoaudio - 4 units - USA
kamco - 2 units - USA *Pre-order Placed*
Baobei - 2 units - UK *Pre-order Placed*
Kokanee - 4 units - Canada *Pre-order Placed*
Abanico - 2 units - Spain
vasilis - 4 units - Greece
astromo - 6 units - Australia *Pre-order Placed*
mlloyd1 - 2 units - USA
markus22ch - 6 units - Switzerland
redjr - 2 units - USA *Pre-order Placed*
gtose - 2 units - USA *Pre-order Placed*
jwjarch - 4 units - USA *Pre-order Placed*
gktaudio - 6 units - USA *Pre-order Placed*
quadtech - 2 units - USA
livingstone - 4 units - RUS *Pre-order Placed*
Bare - 2 units - Can
Quan - 4 units - Aus
MD_Stryker - 2 units - USA
tuyen - 2 units - Australia *Pre-order Placed*
evanc -2 units -USA *Pre-order Placed*
tcpip - 6 units - USA *Pre-order Placed*
Pilcom - 2 units - AUS *Pre-order Placed*
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Old 20th August 2019, 12:22 AM   #162
xrk971 is offline xrk971  United States
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Join Date: Oct 2012
Location: Metro DC area
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
Quote:
Originally Posted by menlobob View Post
What's the advantage of this over a mechanical relay design?
No arcing which degrades contacts - and at worst, can weld contacts shut. No bounce, no noise, no mechanical wear - last forever.

No added distortion as I have shown.
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Old 20th August 2019, 05:51 AM   #163
xrk971 is offline xrk971  United States
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Location: Metro DC area
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
I just got the headphone amplifier version of this circuit to work.

Cheap as Chips OPA1688 Low-THD Muscle Amp

Click the image to open in full size.
1.00Vpp into 51ohms, Akitika 2ppm 1kHz source, FFT with SSR (4.4ppm THD):
Cheap as Chips OPA1688 Low-THD Muscle Amp-8x-opa1622-1000mvpp-51ohms-yes-ssr-jpg

Without SSR (4.2ppm THD):
Cheap as Chips OPA1688 Low-THD Muscle Amp-8x-opa1622-1000mvpp-51ohms-ssr-jpg
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Old 25th August 2019, 12:32 AM   #164
JOIMONF is offline JOIMONF
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Join Date: Nov 2008
Location: Catalonia - europe
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
[QUOTE=xrk971;5890003]I just got the headphone amplifier version of this circuit to work.

Cheap as Chips OPA1688 Low-THD Muscle Amp

Click the image to open in full size.
1.00Vpp into 51ohms, Akitika 2ppm 1kHz source, FFT with SSR (4.4ppm THD):
Click the image to open in full size.

Without SSR (4.2ppm THD):
Click the image to open in full size.[/QUOTE

Last edited by JOIMONF; 25th August 2019 at 12:40 AM.
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Old 25th August 2019, 12:37 AM   #165
JOIMONF is offline JOIMONF
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Join Date: Nov 2008
Location: Catalonia - europe
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
Quote:
Originally Posted by xrk971 View Post
No arcing which degrades contacts - and at worst, can weld contacts shut. No bounce, no noise, no mechanical wear - last forever.

No added distortion as I have shown.
I'd like to read reported in first as best sounding, more transparent, detail, and refinement than mecanical relay. Those specifications reports must come in second place, as a confirmation that nothing weird is added as a background
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Old 25th August 2019, 12:56 AM   #166
astromo is offline astromo  Australia
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Quote:
Originally Posted by menlobob View Post
What's the advantage of this over a mechanical relay design?
Mechanical relays (generally) have a higher failure rate (due to moving parts) than a solid state "switch". Relays can arc and weld their contacts so that they get "stuck on". Bound to be more to it but that's my simplistic take.
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Old 25th August 2019, 01:42 AM   #167
Vunce is offline Vunce  United States
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Join Date: Jan 2014
Location: LI, NY
Ready-to-Run (RTR) SSR DC Speaker Protection and Delay GB
Quote:
Originally Posted by JOIMONF View Post
I'd like to read reported in first as best sounding, more transparent, detail, and refinement than mecanical relay. Those specifications reports must come in second place, as a confirmation that nothing weird is added as a background
Besides the advantage that a SS Protection circuit has no moving parts to wear or degrade over time, I thought the bigger advantage over a relay based circuit is it adds nothing. It has no more or less transparency, detail or refinement than the amplifier itself. I think the posted measurements lead in the direction of proving this correct.
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Old 26th August 2019, 09:54 AM   #168
quan is offline quan  Australia
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Join Date: Feb 2007
Location: sydney
Quote:
Originally Posted by jwjarch View Post
Just placed my pre-order as well! Thanks X!

xrk971 - 4 units - USA
pinnocchio - 2 units *Pre-order Placed*
Vunce - 2 units - USA *Pre-order Placed*
Miggie78 - 2 units - FINLAND
gary s - 4 units - AUSTRALIA *Pre-order Placed*
WTL- 2 units - AUSTRALIA *Pre-order Placed*
ppap64 - 2 units *Pre-order Placed*
drpro - 2 units - USA *Pre-order Placed*
Alarudin - 2 units - SINGAPORE
Ripcord - 2 units - USA
Myint67. - 4 units - Singapore (depends on price )
ravid - 2 units - India *Pre-order Placed*
darrr - 2 units - Poland *Pre-order Placed*
Avtech23 - 2 (maybe 4) units - Australia
necplusultra - 2 units - Dominion of Canada
gannaji - 4 units - USA
Amplitude - 2 units - Denmark
esprit - 2 units - UK
hirscwi - 4 units - USA
yoaudio - 4 units - USA
kamco - 2 units - USA *Pre-order Placed*
Baobei - 2 units - UK *Pre-order Placed*
Kokanee - 4 units - Canada *Pre-order Placed*
Abanico - 2 units - Spain
vasilis - 4 units - Greece
astromo - 6 units - Australia *Pre-order Placed*
mlloyd1 - 2 units - USA
markus22ch - 6 units - Switzerland
redjr - 2 units - USA *Pre-order Placed*
gtose - 2 units - USA *Pre-order Placed*
jwjarch - 4 units - USA *Pre-order Placed*
gktaudio - 6 units - USA *Pre-order Placed*
quadtech - 2 units - USA
livingstone - 4 units - RUS *Pre-order Placed*
Bare - 2 units - Can
MD_Stryker - 2 units - USA
tuyen - 2 units - Australia *Pre-order Placed*
evanc -2 units -USA *Pre-order Placed*
tcpip - 6 units - USA *Pre-order Placed*
Pilcom - 2 units - AUS *Pre-order Placed*
Removed myself from the list as longer required. Thanks.
Quan
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Old 26th August 2019, 04:29 PM   #169
potstip is offline potstip  Turkey
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Join Date: Oct 2013
What do you think about this beautiy is this have same logic?
Attached Images
File Type: jpg a-75_protection_circuit.jpg (817.8 KB, 64 views)
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Old 26th August 2019, 09:01 PM   #170
potstip is offline potstip  Turkey
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Join Date: Oct 2013
Quote:
Originally Posted by potstip View Post
What do you think about this beautiy is this have same logic?
Attached Images
File Type: jpg a-250_protection_circuit.tif.jpg (340.1 KB, 59 views)
File Type: jpg e-650_protection_circuit_1.jpg (646.1 KB, 48 views)
File Type: jpg e-650_protection_circuit_3.jpg (759.8 KB, 48 views)
File Type: jpg e-480_protection_circuit.tiff-1.jpg (529.2 KB, 49 views)
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