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ACA V1.5 Illustrated Build Guide
ACA V1.5 Illustrated Build Guide
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Old 15th May 2018, 02:55 PM   #341
nycavsr2000 is online now nycavsr2000  United States
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ACA V1.5 Illustrated Build Guide
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Originally Posted by Jason View Post
Hi Rafa. Unfortunately we had to close the pre-order early. We use only genuine parts from quality US suppliers. They only have so many parts in stock and we are going to have to wait for them to restock. We're waiting to hear back. More information here: Amp Camp Amp Kit V1.6 - Pre-Order Status Page – diyAudio Store
Jason,

Thanks for all you do and putting up with us Greedy Boyz!

Luckily I ordered in time (actually the 1st hour the ACA preorder page was up). But I am curious...how many orders are projected to ship on 7/31/18, if you don't mind?

Best,
Anand.
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Old 15th May 2018, 08:36 PM   #342
SHN is offline SHN  Canada
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Quote:
Originally Posted by 6L6 View Post
This guide uses the 19V supplies, so I set 10V.

If you have 24V supplies, set 12V.

Hello, I remember reading somewhere that if I use the new 24V/5A PS for the V1.6 on my V1.5, I could boost the output from 5W to 6W. From you post, now I believe I will also have to set the voltage to 12 V. Would you know why the version 1.6 kit could do 8 W, what else is different between the two versions aside from the 19 V vs 24 V power supplies?

Also, I have an old laptop (Dell I think) power supply that is 24 V/4.7 A, do you think I can just it, instead of having to buy the new 24 V one from the DIY store?
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Old 16th May 2018, 04:07 PM   #343
Dennis Hui is offline Dennis Hui  Canada
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ACA V1.5 Illustrated Build Guide
I think your laptop supply will be fine. Just make sure the plug's polarity is
what the amp expects.

If you use a 24V supply, you should make the '12V' adjustment.

Can't comment about the 8W. Perhaps it's quoted at a different distortion figure
from before?
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Old 16th May 2018, 05:00 PM   #344
chrisb is offline chrisb
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Dennis - good catch on the polarity - I managed to blow a pretty good sized hole in a Tripath chip a year or so ago by "ugrading" to a supply from a pair of old Monsoon speakers that was wired the other way. My bad for not checking, of course.
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Old 17th May 2018, 03:26 PM   #345
SHN is offline SHN  Canada
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Quote:
Originally Posted by Dennis Hui View Post
I think your laptop supply will be fine. Just make sure the plug's polarity is
what the amp expects.

If you use a 24V supply, you should make the '12V' adjustment.

Can't comment about the 8W. Perhaps it's quoted at a different distortion figure
from before?
Thank you very much. Another question, the guide shows the two channels not layout in mirror image, any particular reason why I cannot lay them out such that the 3300 uf caps will be on the same side? That is, near the back panel side.
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Old 18th May 2018, 01:31 AM   #346
SHN is offline SHN  Canada
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Finally got it done today! Set to approx. 10 V cold, it's getting late and I wanted to try it out right away so I'll re-do it tomorrow. For now, it sounds good, but there is a thump every time I turned it off, and I turned it off first. It's not too loud but loud enough to have me concerned. I wonder if I did something wrong, or this is normal for this amp?
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Old 19th May 2018, 05:30 PM   #347
Nelson Pass is offline Nelson Pass  United States
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ACA V1.5 Illustrated Build Guide
Quote:
Originally Posted by nycavsr2000 View Post
1) What is the output impedance of this amp (below 1khz), for the lower gain (10dB), higher feedback option?

2a) In the bridged monoblock version, I take it that the overall gain using two of the 10dB versions strapped together is 16dB? And the overall gain using two of the 14dB versions is 20dB?

2b) How does the output impedance change in the bridged monoblock version? Assume XLR inputs with a true balanced source.
The DF is 10 into 8, which is .8 ohms.

This becomes 1.6 ohms (DF=5) in balanced or bridged mode.

The gain remains the same - it's relative to the sum of input signals.
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Old 19th May 2018, 06:09 PM   #348
nycavsr2000 is online now nycavsr2000  United States
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ACA V1.5 Illustrated Build Guide
Quote:
Originally Posted by Nelson Pass View Post
The DF is 10 into 8, which is .8 ohms.

This becomes 1.6 ohms (DF=5) in balanced or bridged mode.

The gain remains the same - it's relative to the sum of input signals.
Ah!

Nothing is for free.

Thanks Mr. Pass!

Best,
Anand.
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Old 20th May 2018, 12:03 AM   #349
DizRotus is offline DizRotus  United States
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Excellent 6L6. Your interesting and informative thread is being followed by members of the Klipsch forum. We’re always looking for clean amps to power efficient speakers.
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Last edited by DizRotus; 20th May 2018 at 12:27 AM.
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Old 20th May 2018, 02:01 AM   #350
DizRotus is offline DizRotus  United States
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Originally Posted by wdecho View Post
When assembling or installing anything such as a water pump on a car you install all bolts, screws, in before tightening any of them. If you don't some will not go in correctly.
I can hear my late father telling that to me as I tell it to my sonís.
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