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Old 16th May 2011, 08:37 PM   #41
DaveM is offline DaveM  United States
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So, what kind of amperage does it draw. I love that you have a proper Papa designed amp in your car.
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Old 20th May 2011, 07:59 AM   #42
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Hi, Tiefbassuebertr

The extrusion company is "EDICO". They said that this extrusion profile is actually a custom one, (for telecomunication company at that time). They still have the moulding, but we have to buy minimal 1 ton of aluminum.

I don't have the documentation of the making of this amp. Basically it is an F5 with 12V SMPS.

Sound is nice (how should I say this ? )

I think F5 can work in AB mode. So I'm not using the bias value recomended by the article, I use less than that. The amp draws about 5A at 12VDC. I can adjust the bias value to the article value, but it just toooooo hot for my current heatsink
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Old 12th January 2012, 07:27 PM   #43
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Hmmm the car amp seems pretty interesting.... Any schematics available? Especially for the SMPS?
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Old 14th January 2012, 02:55 AM   #44
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by Dr Zeus View Post
Today I run a Soundstream MC140x in my car, and I've been telling people it's design roots are of Nelson pass. I beleive the MC series of amps were similar to the Dxx series of the time - MC being the higher end. Its a Class-B design using TIP102/107 otuputs.

Am I correct in calling this amp a Nelson Pass?

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This is not an NP design , well i dont think so , the Class A-40-50 d40, d60
d100, d200 were, the early ones ..

The Class -A 40 was the best sounding of the bunch IMO , they would thermal shut down on a hot day , so they did an Class-a 50 with reduced bias. We used to run cooling fans on them to prevent thermal shut down.

Still have a few ....
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Old 14th January 2012, 03:12 AM   #45
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When I was doing remote recording, I had a Soundstream D200 driving ADS200s in a station wagon. The speakers could be swiveled to face backwards towards the tailgate where a Studer 169 mixing console rested. Great portable monitoring system. I acquired the Soundstream after a fellow Acoustat owner, who had Thresholds, told me that Maestro Pass had a hand in their design.
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Old 14th January 2012, 05:26 AM   #46
MOER is offline MOER  United States
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Default A2125

The A 2125 which Zed built for Alphasonik in 1985 was a regular class B amplifier using TIP35/36 for the amplifier and TIP35 for the switching supply. We ran the supply at about 25KHz as this was the limit for TIP35's. Unfortunately good MOSFETs were not available at that time.

The sliding bias was based on Threshold's patent but it could never be biased so that the output stage ran at any decent level of class A.

This was pretty much the same design as the early Hifonics which we were producing at that time.


Steve Mantz
Zed Audio Corporation
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Old 1st January 2013, 02:49 PM   #47
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Quote:
Originally Posted by tiefbassuebertr View Post
perhaps the 4702 resp. GFA4702
Analog Art Car Audio Club :: [ݤ峹 - ADCOM 4702 AMPLIFIER
Anyone own any Adcom car audio
I like outdoor power supplies for amps, both for home and car audio
Yes thats one of them it was like a concert in your car
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Old 11th December 2013, 08:28 PM   #48
troystg is offline troystg  United States
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I thought Mr. Pass had a hand in the Nakamichi amps too.. Maybe just licensed from Threshold? I had one that was 35wpc and loved it...

I currently have 2 D100's and my friend has some Adcoms NIB in his basement...
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Old 11th December 2013, 10:33 PM   #49
Zen Mod is offline Zen Mod  Serbia
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Nakamichi with Stasis circs
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Old 12th December 2013, 04:18 PM   #50
troystg is offline troystg  United States
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Nakamichi with Stasis circs
That would be it... I didn't see it mentioned in this thread... That was a lovely sounding amp..
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