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Sherwood SEL-400 Int Amp - Strange Power Issue

Just acquired a beautiful-condition Sherwood SEL-300 tuner and SEL-400 integrated amp. While the tuner is fine, the 400 powers up without turning it on! Checked with headphones, and all you get is static and a faint signal through all incoming channels - and a loud hum. Have not and will not test with speakers until issue addressed. The unit appears to have not been tampered with, fixed, etc.
I'm no expert, but no dummy with vintage gear, either, and have never seen this problem before. Anyone have any insight?

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I have one with the exact same problem. I think it is in the protection circuit. I am waiting for my tech to have the time to recap and fix it.

Posted on Aug 15, 2010

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Posted on Jan 02, 2017

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Cam specs on a 1967 Pontiac 400, 335 hp


Firebird App. Pontiac Part # Duration @ .050 Degrees Int/Exh Adv Duration Degrees Int/Exh Lobe Center Degrees Int/Exh Lobe Separation Angle Overlap Cam Lift Int/Exh Gross Lift Int/Exh
(1.5:1 Ratio Rocker) Gross Lift Int/Exh
(1.65:1 Ratio Rocker) 1977 TA6.6 549431 274/289 62 .249/.270 .374/.406 .411/.446 1978 TA6.6 10003402 273/289 54 .270/.271 .406/.407 .446/.448 1979 TA6.6 10003402 274/298 55 .249/.270 .374/.406 .411/.446 1967 400, 1968 350, 1973-76 400 w/ AT 9779066(E) OEM 200/210 273/282 106/116 111.25 55 .272/.271 .408/.407 .449/.448 1967-68 400HO w/ MT 9779067(P) OEM 200/213 273/289 113.5 54 .272/.271 .408/.407 .449/.448 1968 400 HO MT & RA-I AT, 1969 350 HO MT, 1969 400 MT, 1970
RA-III MT/AT, 1971-72 455 HO MT 9779068(S)
OEM 212/225 288/302 113/118 116 63 .272/.271 .408/.407 .449/.448 1967 RA MT/AT, 1968 RA-I MT,
(Some 1969 GTO RA-III MT) 9785744 (H)
OEM 224/236 301/313 112/119 115 76 .272/.271 .408/.407 .449/.448 1968-70 RA-II & RA-IV MT/AT 9794041
(T) OEM 230/240 308/320 112/115 114 87 .313/.313 .470/.470 .516/.516 (Stock in RAIV)

Sep 20, 2017 | Pontiac Cars & Trucks

1 Answer

Hi, I have a Rotel RLC 900 power conditioner. I had my Rotel amp and preamp plugged into the two amp outlets. I also had a tuner and cd player plugged int. Everything has been working great.


Hello, there is a problem with the power factor of the air conditioning unit and/or the power supplies of your audio equipment.
Read this first...
http://en.wikipedia.org/wiki/Power_factor
As you see, the electric motor of the external unit of your Air Conditioning, produces a distortion in the line of voltage, then you must talk with a specialist in that topic....
Try this....
http://www.eaton.com/Eaton/ProductsServices/Electrical/ProductsandServices/PowerQualityandMonitoring/PowerFactorCorrection/index.htm

Oct 22, 2014 | Heating & Cooling

1 Answer

What amp for a Pioneer TS-W304C 12 inch sub


You seem to be looking for an amp made for car audio. There are many brands, but I going to give you the specs for your particular speaker which will help in choosing, not a specific name brand amp, but at least one with the proper power outputs/requirements.

Your speaker, based on the model number you provided, is rated at 4 ohms .Power handling range is 50-300 watts. And a peak of 600watts. That does not mean start cranking 600watts thru the speaker, it will blow. I suggest you acquire a single (mono) channel amp that provides 350-400 watts at 4 ohms.

Hope these specs help you in choosing an amp.

Jan 07, 2013 | Car Audio & Video

1 Answer

What amp for a Pioneer TS-W304C 10 inch


Wow, i just answered a similar question so, pretty much the same answer.......

You seem to be looking for an amp made for car audio. There are many brands, but I going to give you the specs for your particular speaker which will help in choosing, not a specific name brand amp, but at least one with the proper power outputs/requirements.

Your speaker, based on the model number you provided, is rated at 4 ohms .Nominal power handling range is 300 watts. And a peak of 600watts. That does not mean start cranking 600 watts thru the speaker, it will blow. I suggest you acquire a single (mono) channel amp that provides 350-400 watts at 4 ohms. Leaves you a little headroom on the amp, but use caution.

Hope these specs help you in choosing an amp.

Jan 05, 2013 | Pioneer TS-W304C Car Subwoofer

1 Answer

My Sherwood R-925 tuner/amp turns off all the time can you help me ?


AUDIO gear usually does this when there is a major fault in the power amp section. Unless you are a qualified repair tech, you should have it repaired by a service tech.

Oct 07, 2010 | Sherwood R-925

2 Answers

Tuner shuts off as soon as i turn it on (sherwood xr-4109)


Check the speaker wiring in the back. Make sure it is not wired improperly.

You could remove the speaker wiring from the back of the amp and see if it still shuts off after turning it on.

If it still shuts off after the wiring is removed, it is a problem with the amp itself.

If it remains on after the wiring is removed, then I'd say you have a problem with the speaker wiring or the speakers themselves. It still could be a problem with the amp in this case though... just a problem when it is trying to put power to the speakers.

Mar 30, 2010 | Sherwood RX-4109

2 Answers

I HAVE A OLDER KENWOOD STACK HOME STEREO SYSTEM WITH OUT MANUALS OR REMOTES AND NEED TO KNOW HOW TO HOOK ALL THE COMPONENTS TOGETHER. KC-206 STEREO CONTROL AMP KT-76 TUNER KX-96W CASSETTE DECK KM-106...


start with the tuner, hook up the equalizer to the tuner, then on the rear of the equilizer hook up all the peripherals except the amps which will go to the tuner outputs and all will feed thru the tuner to the amps and out to the speakers

Oct 23, 2009 | Audio Players & Recorders

3 Answers

Else if statement on turbo c, # hour worked: bonus: hour<40 & >=45 P500 hour <40 &>=35 P300 hour >20 & <=30 P150 display bonus,salary and...


Hi, First of all please check the conditions but as far as i understand the conditions the program would be like this-
#include<stdio.h> #include<conio.h> void main() { int salary,bonus,totalsalary,hours; printf("enter salary"); scanf("%d",&salary); printf("enter hours"); scanf("%d",&hours); if(hours<45 && hours>=40) { bonus=500; } else { if(hours<40 && hours>=35) { bonus=300; } else { if(hours<=30 && hours>20) { bonus=150; } else { bonus=0; } } } totalsalary=salary+bonus; printf("Salary=%d",salary); printf("Bonus=%d",bonus); printf("Total Salary=%d",totalsalary); getch(); }
But the conditiosn given by you are not seems to be correct.Just correct the conditions value if wrong and run the program Thanks! mannu_rakesh

Aug 04, 2009 | Computers & Internet

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