Question about Sherwood RD-7500 Receiver

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Sherwood rd 6502

Running x2 speakers
like to bridge for more power ???

speakers are 4-8 ohms
rms 20-200watts
max power 600w peak

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dunnbiker
  • 8546 Answers

SOURCE: RD-6500 Sherwood amp

What model RC? Doesn't its manual give some clues?

Posted on Apr 04, 2009

dunnbiker
  • 8546 Answers

SOURCE: Sherwood RD 6502 :

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Posted on Jul 02, 2011

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2 Answers

Can I replace the speakers on this system? Speakers are too large for space & want to replace with another brand.


make sure impedance is the same so 6 ohms and the power rating of speakers is no less than 200 watts peak rms.And bare wire ports on back of speaker.
The power rating is so the speakers can handle the maximum power delivered by stereo amplifier without burning out speakers coils.

Jan 23, 2016 | RCA Audio & Video Receivers

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Zone 2 Amplifier Need


Reread the detailed answer provided in response to your earlier post on this issue

Jun 10, 2013 | Pioneer VSX1020K Receiver

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Sherwood RD 6502 : Once i switch it on, it automatically goes off.


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Jul 02, 2011 | Sherwood RD-6500 Receiver

1 Answer

My Sherwood RD-6105 shuts off if I turn it up past 28 or 29 db (which isn't very loud). I'm using it in Dolby Digital mode. It even happens when I use it with my components that are analog. This just...


It's acting as if a short or near-short exists on the amp outputs at medium levels.

Disconnect one of your speakers at a time and try it. Make sure your speaker wires are tight and not shorting to anything and all channels have 6-ohms or more load.

Jan 16, 2011 | Sherwood RD-6105 Receiver

1 Answer

Would like to hook up two recievers to push all my speakers comfortably. I have a pioneer vsx d490 and a sherwood rd 6500. How wud i accomplish this?


I think you mean Pioneer VSX-D409.

Since the two receivers are similar and capable of driving everything else in the room, I guess you want to treat one receiver like a basic amp, like for a passive subwoofer, right?

However, still guessing your intent...

The VSX is a basic 5-channel amp (5 x 100w) but only has digital multichannel inputs. It has optical and coaxial digital inputs and an optical digital output.

The Sherwood has coaxial and optical digital inputs and no digital output, but it has analog inputs, so it would be easier to selectively use any or all of its amplifiers, which are about the same as the Pioneer's (gotta read the fine print - Sherwood uses a 6-ohm load instead of 8-ohm to get the numbers).

Choose the one you like to use for the control (master). Run its Sub Out to the other receiver's AUX input using an RCA splitter to feed both input channels. Attach the sub to one set of front speaker terminals. Configure theat receiver for NO SUB so it won't steal LFE from theis channel. Designate the FRONT speakers as Large.

Setup would be tricky because you have to choose a volume setting on the slave amp and stick with it. It might get changed after you set the levels and negate the setup efforts. OTOH, you would have the flexibility to change it independently if desired.

My $.02... If subwoofer power is all you need, why not just get a nice Carver 2-channel amp on eBay (2x100w would suffice), bridge it to 200 watts and blow the house up, figuratively? Then you could redeploy or sell the unused receiver.

Jan 18, 2010 | Sherwood RD-6500 Receiver

1 Answer

How many watts does a r-30 put out to each of the 2 speakers at what ohms?


2 ohms is a heavy load should run into 4 ohms but what ever the ohm age 30watts into 8 ohms is 30 watts assuming this is rms 30 into 4 will give 60 rms do not recommend going any lower almost a dead short will damage amp

Nov 06, 2009 | Onkyo TX-8511 Receiver

2 Answers

Can I run two E.V. Eliminators (1-15 and horn...8 ohms) in series from the bridged output? What my wattage be? I have an EMX5000 powered mixer. Jim Price pocket218@gmail.com


Hi pocket218

Probably not the way to go about hooking it up. running speakers in series is not very practical with PA gear. The connections get messy to make as you need adaptor leads, and it is something that is seldom ever done.. When you use bridge mode it uses left and right channel together to drive the one output, combining the power. Best bet is to run the EMX5000 in stereo mode, and connect 1 speaker to each channel. You may have been trying to reel in extra power from using bridge mode, but the power amp stages in the EMX will only ever be able to deliver the same MAX power whether in bridge or stereo. the best way to get maximum power and sound pressure levels from the unit is to hook TWO speaker boxes to each channel, you get the combined increase in efficiency of the extra speakers and run the output stages at 4 ohms to get absolutely all the power available
If you have any questions about it, feel free to ask me, happy to talk to you further about it.

regards
robotek

Sep 11, 2008 | Yamaha Audio & Video Receivers

4 Answers

Sherwood rx4105


you may be using an equalizer? try to pop-up the volume with all tone controls in flat mode. see if it still cuts off. if this is the first time youencounter this then something must be wroing with either your speakers or your amp. unless your ventilation is not good enoughg, you can also try placing a blower on top of your unit to cool it down

May 04, 2008 | Sherwood RX-4105 Receiver

2 Answers

Home theater system protection kicks out


Nice write-up.

http://www.sherwoodusa.com/pdf/RD-6500(English).pdf

On page 6 of the manual it states you should use a powered subwoofer and the unit provides a sub output on the rear panel for it. The message from the amp kicking out is that you're not going to get away with your workaround.

I would advise you to purchase a nice amplifier (2-channel bridgeable or single channel) for the subwoofer. That way you'd be sending only LFE signals and your receiver has provisions for adjusting its volume relative to the rest of the channels. I use a nice 5-channel Carver for my 3 subs and both Rear Surrounds.

On eBay I see what I would get if I were you - a Carver M-200T (120W x2; 300W bridged). I have one.

http://cgi.ebay.com/Carver-Magnetic-Field-Power-Amplifier-M-200t-120WPC-Amp_W0QQitemZ200327110781QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item200327110781&_trksid=p3286.c0.m14&_trkparms=66%3A2%7C65%3A1%7C39%3A1%7C240%3A1318

Mar 02, 2008 | Sherwood RD-6500 Receiver

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