Question about SpeakerCraft BB835 8-Channel Amplifier

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SpeakerCraft BB835 8-Channel...


i live in norway and we have 240 volt here. just got hold of a SpeakerCraft BB835 8-Channel... amp that runs on 110 volts. i open the caseing and followed the power cords from the power inlet. says there is a jumper for 110V and one for 240V , will it run here on 240 V if i move that jumper ??


Jon Valset

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Re: SpeakerCraft BB835 8-Channel...

Take the risk if you will attempt to change the voltage. but if your are willing to use the amplifier just take it to any authorized personels who knows. OK?

Posted on Jan 25, 2008

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Why channel A clipping on soundcraftsmen ma5002a what's wrong

When you have a DC voltage on the output, check your capacitors in the amp. Looks like the big electrolytic is defect.
I don't have a manual of this amp, so I can't verify if I'm right and what cap you should look for.

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Sony amplifier protect mode

The protect mode setup provided to protect the speakers against burning due to the amp output short circuit. protecter activated means one or more channels of the O/Pamp is short circuited(defective) in your amplifire . First of all Remove the Power cable from the Amplifier and make sure no power connected to the Amp.
1.First step identify the faulty O/P Amp Channel---------
Inside the Amp you will see Five O/P Amp Sections (all are looking similar this is the common idea to locate the O/P Amps) there will be ten power transistors fitted on heatsink (2 transitors for each channel).some cases damaged transister are visible physicaly then easily you can identify the faulty channel(maybe cracked or blowned). There is no visible signs then you must do some tests with multimeter.You will find Five relays on the pcb( mostly square or rectangular ice cube relays) each relay have coil and N/O contacts built in and the terminals soldered to the pcb first you should identify the contact terminals (mostly it will be marked at the top side of the relay) otherwise a simple idea is , look on the pcb solder side trace the printed copper track going from the terminals of the relays you will see one is going to the speaker out socket this terminal called Sp O/P, other one going to the Amp O/P Transisters legs (some cases it pass through a coil of few turns) this terminal called Hot O/P . Do the same follow up and find the both terminals for the all the 5 channels.
Next step make sure you or not touching any live power (220v or 110v A.C) tracks or wires inside the Amplifire and you should keep this in your mind althrough the following tests
Take your multimeter select the D.C Voltage Range connect the Negative probe(Black) to the Metal Body of the Amp and put the positive probe (Red) apart safely. plug back the power cable to the Amp and power it from your wall socket then switch on the Amp. Turn the volume control knob to zero and select the input selector switch to Linein or Aux and remove the RCA Cable connected to that input socket. Now carefully touch the Hot O/P terminal of the relays with the positive probe and note down the voltage readings on a paer (Do this for all 5 relays one by one, values result may be + volt or -- volt or zero volt). After see the reading values we can find the faulty Amp section
1. The channels showing zero voltage are in good condition.
2. The channels showing + volt or -- volt ( may vary from 1 volt to 30 volt ) are faulty damaged Amp sections.
Now we located the faulty Amps then how to fix the faulty ones.
before going to do the next step switch off the Amp and remove the power cable from the wall socket. Check all active components one by one (transistors,diodes,zener diodes) and resisters capacitors in the faulty Amp section replace the faulty components by the same value new ones. carefully test the components twise. if you miss a small defect component or replace it in wrong way this single mistake will blow up your Amp again. After replaced the defective components do the relays Hot O/P terminals volt reading test process again. if all the readings are zero volt you have successfully repaired your amp still the reading showing some voltage means you must do the components checkup process again. If you do it slowly with full concentration surly you will fix your problem and your Amp will work back to enjoy the music .GOOD LUCK.
for comments and doubts contact

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What should i set the micro switch on the back at?

2 ohm stereo (per channel): 975W
4 ohm stereo (per channel): 660W
8 ohm stereo (per channel): 400W
4 ohm bridge-mono: 1950W
8 ohm bridge-mono: 1320W

Load Impedance: Safe with all types of loads. Rated for 4 and 8 ohms in Stereo mode, 4 ohms in Bridge-Mono mode

Voltage Gain to 1-kHz, 8-ohm rated output,
CE 1000:
30.5-dB gain at 1.4-volt sensitivity;
26-dB gain at 2.34-volt sensitivity.
CE 2000:
32.1-dB gain at 1.4-volt sensitivity;
26-dB gain at 2.83-volt sensitivity.

Required AC Mains: 50/60 Hz (North American units are 60 Hz only); 100, 120 and 230-240 VAC (+/-10%) units are available.
AC Line Current,
100 Volts: 11.4 A;
120 Volts: 9.5 A;
230-240 Volts: 5.0 A;
At Idle: All amps draw no more than 90 watts.
AC Line Connector: NEMA 5-15P (15 A).

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1 Answer

Behringer amp 240 to 120 volts

What you may need is a

Voltage converter ' Voltage Transformer ' step up and step down ...

Connect the 220V line output to EP2500

And the 110V input to your 110V convenient outlet

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Got this amp 3 years ago but never opened the box before today. I hooked it up but now it wont turn on and the fuse is fine. ?? Thanks,

If you know how to use a Volt meter, measure the DC outputs of the power supply. The power supply section might have a cold soldered connection that opened due to none use.

Jan 21, 2011 | SpeakerCraft BB835 8-Channel Amplifier

1 Answer

Can ce 2000 be converted from 110 volts to 240 volts ? How much would it cost?

You could get an outside box called a Step down transformer that would deliver 110 volts to the amp. A quick look on Google should come up with prices.
All you need however is a new transformer. If you can find the specifications for the one in the amp it will be much easier to get a new one. All you need to know is the outputs of the secondary windings of your amp's transformer and current ratings. The primary winding will be 240 on the new one and 110 on the old. But you can get one with both!
If you ask Crown they might even convert it for you or put you in touch with someone who will.

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Change from 110 to 220 volts transformer

It sounds like the replacement 220 volt transformer is putting out too much power, as replacing a 110 volt transformer with a 220 volt one should have no effect on other components, as the output voltage and amperage should be the same as the original one.

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Speakercraft DBB12100 Amplifier, Circuit problem

Sounds like its a problem with over heating. open unit clean out all dust and dust bunnies wich compressed air. check that all fans are opperating. (fans on 6x100 amp units or thermal controled). If amp goes into protection prior to fans turning, there is your answer. the @ power supplies will have a green light on the output side. if the light in on power supply is good. or you can check that the output voltage is at 48Vdc on both units.

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While living in the States I purchased a Bose Acoustimass 10 system but have now moved back to the UAE. As the system operates on 115 volts ONLY I would like to get it work on 240V without having to use a step-down transformer. By changing out the transformer form 115v to 240v will it work or will I have to change any other components within the system. Can anyone help me??

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1 Answer

About converting from 110 volt to 220 volt Sonance Cinema 5150

Yes no problem all you need is a transfromer that converts 230volts AC to 110 volts AC.

Have a look in your yellow pages to find a Transfromer company
located in your vincinity.

You will need to visit him with the wattage of your amplifier and order a step down transfromer. (The wattage is found on the small plate on the rear of the amplifier. Sometimes its written as KVA?.

Please ensure that the plug on the amplifier is changed to specially fit the 110v output of the transformer this is a must as people plug the wrong plug into the wrong socket and burn out the amplifiers.

Cheers YUBEUT.

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