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10F/8424 & RS225-8 FAST Ref Monitor
10F/8424 & RS225-8 FAST Ref Monitor
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Old 20th September 2018, 04:46 AM   #1321
xrk971 is offline xrk971  United States
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10F/8424 & RS225-8 FAST Ref Monitor
I just ran into this design for a tapered TL for RS225-8:

T-Line for Dayton Ref 8" (RS225)
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Old 21st September 2018, 10:38 PM   #1322
xrk971 is offline xrk971  United States
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Possibly the finest "kitchen radio" I have ever heard? My basement repairs are still not done and my main system has been sitting there unused in storage upstairs for 2 months now. So I decided to dust it off and put it in my kitchen. Here are the 10F/RS225 FAST speakers with one of Hugh's new 35w Class A amps (cooled with 4 silent PWM fan cooled CPU heatsinks) and all fed by an Amazon Dot for source. Extremely easy to use and great sounding.

10F/8424 & RS225-8 FAST Ref Monitor-class-kitchen-radio-jpg
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Old 21st September 2018, 10:46 PM   #1323
jwjarch is offline jwjarch  United States
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Not bad for a kitchen system! Hugh's new 35 watt Class A amps? Please tell us more. Did I somehow miss this thread or are they a commercial product he's selling?

I have a Dot on my kitchen system as well. In all honesty my $15 bluetooth receiver sounded WAY better but I've gotten used to the sound of the Dot now. It's okay.

Good luck on getting the basement finished up, X!
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Old 21st September 2018, 11:09 PM   #1324
xrk971 is offline xrk971  United States
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Quote:
Did I somehow miss this thread or are they a commercial product he's selling?
You did not miss it, it’s a new design I am testing out for Hugh.
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Old 21st September 2018, 11:09 PM   #1325
pcgab is offline pcgab  United States
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Originally Posted by jwjarch View Post
Not bad for a kitchen system! Hugh's new 35 watt Class A amps? Please tell us more. Did I somehow miss this thread or are they a commercial product he's selling?
You beat me to it

*cough* ...... Hugh's new 35w class A amps?

Cheers,
Gable


ps - I wish we had basements down here in Central Texas...they are rather uncommon in these parts....
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Old 21st September 2018, 11:11 PM   #1326
pcgab is offline pcgab  United States
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Originally Posted by xrk971 View Post
You did not miss it, itís a new design I am testing out for Hugh.
Can't wait to hear your thoughts on it, X.
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Old 21st September 2018, 11:37 PM   #1327
zman01 is offline zman01  Bangladesh
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Originally Posted by xrk971 View Post
You did not miss it, itís a new design I am testing out for Hugh.
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Originally Posted by pcgab View Post
Can't wait to hear your thoughts on it, X.
Yes, that would be nice.
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Old 22nd September 2018, 12:12 AM   #1328
xrk971 is offline xrk971  United States
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I can’t give technical specifics since it’s a commercial design, but the sound, as you might expect from Hugh, is superb. It does everything just right. The amp has a lots of caps right on board for the built in power supply. The distance from power supply to outputs is very short and as you might expect, the impedance is very low for deep impactful bass.
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Last edited by xrk971; 22nd September 2018 at 12:15 AM.
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Old 22nd September 2018, 01:17 PM   #1329
xrk971 is offline xrk971  United States
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I changed the Dot to a dedicated Sanwu Bluetooth streamer device followed by my OPA1688 dual parallel headphone amp as a preamp, and I have to admit, the sound is much better than the Dot by itself. Although most of it may just be the preamp. The volume of course, can be turned up past clipping now if desired and this amp holds up very well. Still playing super clean at loud levels. Very clear yet loud. I even put some hip hop on and the bass kick was very good.

10F/8424 & RS225-8 FAST Ref Monitor-6ae7f34c-38b4-49bc-8162-1aa137e6b7b6-jpeg
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Last edited by xrk971; 22nd September 2018 at 01:27 PM.
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Old 23rd September 2018, 03:23 AM   #1330
AKSA is offline AKSA  Australia
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Ahem, I decided to develop a more efficient version of the ALPHA, which clips on negative half cycle at -17V, a long way off 24V.
The technique is unusual but works very well. With 28V volts, only 4V more than the ALPHA rails, gives it 35W into 8R and around 60W into 4R.
When X built and auditioned we decided to develop it further to a commercial product which will be sold for dollars.

Now I'm absorbed in the case issues, having spent two months poring over the pcb design, which includes SS relay protection for the speakers.

It will be announced in three months, for Xmas, as a new product. I hope, that is, if my metal spinners are happy to deliver.......

According to X, it might be Aspen's best amplifier yet, who knows? I am still waiting on the 350x150mm heatsinks, each channel dissipates 98W, so while a CPU cooler is a great idea, I believe a very large heatsink will be just sufficient.

I'm sorry, but I cannot give too many designs to the forum open source, I have to sell a few of the best for those who do not build their own....... they want their products, and I need to make my business earn its keep.

Hugh
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