How to Check 6-Ohm Speaker Wattage Running Thru an 8-Ohm Receiver

Typically, the typical measurement for speaker sensitivity is the number of decibels produced by the speakers when one watt of power is applied at one meter from the speaker’s location. To achieve the same volume level with a more sensitive speaker, less amplification is required.

Transistors are used to provide the power required by amplifiers (whether standalone or integrated into a receiver). In the olden days, vacuum tubes were employed in amplifiers and some extremely expensive high-end amplifiers still use vacuum tubes because certain audio fans love the sound of tubes.

This article includes simple steps and guidelines to check a 6-ohm speaker wattage running through an 8-ohm receiver. You will also find more information on speaker impedances. Follow the article keenly to get detailed information. You will find answers to some of the frequently asked questions at the end of the article.

Factors to consider when checking the wattage running through a receiverhow to check 6 ohm speaker wattage running thru a 8 ohm receiver

  1. Take into consideration the size of the home theater as well as the volume at which you intend to play your music and movies. If you want to cause irreversible hearing damage or if you have a space the size of a Taj Mahal, you might want a transmitter that can blast out 150 watts per channel.
  2. If you have somewhat sensitive loudspeakers and a reasonably sized home theater, and you don’t want to put your window glass through its paces with really blaring music, a receiver with 70 watts each channel (or less) would be sufficient
  3. The majority of home theater receivers have roughly 100 watts per track (accurately measured), which is more than enough power for almost any room setup.

Integrated circuit receivers are used in low-cost receivers because they combine the power-generating transistor for multiple audio streams on a single chip. Better receivers are equipped with discrete amplifier output transistors, which are transistors that are dedicated to each channel. Generally speaking, a discrete architecture produces more power and better sound.

1. Measuring the speaker impedanceMeasuring the speaker impedance

To measure the speaker impedance, two approaches can be used: Quick estimation and accurate measurement. In electrical engineering, the term “impedance” refers to a speaker’s resistance to current. Generally speaking, low impedance speakers will likely draw more current from their amplifier than high impedance speakers. Its range and loudness would be reduced if that impedance was too high for your amp to cope with.

Since it is striving to produce greater power if the resistance is too low, an amplifier that has too low an impedance will self-destruct. The impedance of a speaker can be measured with a multimeter if you are interested in learning how to do it. However, some specific tools are required for more precise testing.

Quick estimate

You should look at the label to see what the nominal impedance rating is. The impedance rating of most top-tier speaker manufacturers is listed on the package, and in some cases, on the label as well. This rating is typically expressed in terms of 4, 8, or 16 ohms. This is normally an estimate for ordinary audio ranges, but it can be more accurate. In most cases, their frequency occurs at frequencies ranging from 250 hertz- 400 hertz.

The main impedance is typically near to the values throughout the ranges, and as the frequency of the signal is increased, the impedance climbs steadily. Nevertheless, below the frequency, the impedance varies rapidly, eventually reaching the resonance frequency of the loudspeaker. The majority of manufacturers prefer to list the recorded impedance for a certain listed impedance rather than the specified listed impedance.

While most bass tracks are around 90 and 200 Hz, the chest-thumping sub bassline can be as low as 20 Hz in some cases. In most bass records that are in the zone of 90 to 200 Hz, you can hear a good sample of what these frequencies represent in terms of their meaning. In the intermediate frequency range (250 Hz to 2k Hz), which comprises vocals and non-percussion devices, there are no percussion instruments.

2. Using a multimeter to measure the impedance of the speakerUsing a multimeter to measure the impedance of the speaker

Resistance can be measured with a multimeter by putting out small DC impulses, which can then be read back. However, since impedance is a feature of alternating circuits, this device will not be able to measure impedance directly. However, while this method can be used to identify speakers with different impedances, it will only get you close enough to an audio setup that it will be useful in other situations. The resistance must be set to the smallest possible value for safety reasons. While a 200 is considered typical for most multimeters, readings obtained with a 20 multimeter may be more accurate.

There is no need to manually select an impedance range when only one option is available. A speaker’s voice coil can be distorted by too much direct current. Fortunately, many multimeters are set to emit only a small amount of current, reducing the risk. How to evaluate speaker impedance is a good response.

Accurate measurement

To start, you’ll need a sine wave generator. A sine wave generator is needed since a speaker’s impedance varies with frequency. The best choice is a sound frequency oscillator. However, certain types will give incorrect data because of a poor sine wave or voltage changes. If you are new to DIY electronics or audio testing, you should look into audio testing software for computers. The auto-generated data is reassuring for newbies. An amplifier should be the input. Find the amp’s RMS power. Higher power amplifiers are likely to produce more accurate results.

Frequently Asked Questions:

  • How is the wattage of an appliance calculated?

Answer; you can power multiple items at once. Add running watts and start watts. RUNNING WATTS of the objects to power In the Overall RUNNING WATTS column, enter this.


As a general rule, it is better to use a high-quality multimeter since less expensive models mostly produce unreliable readings. Opt for a resistor with a high resistance value. 

Your resistor should be selected following the appropriate resistance; however, you may alternatively choose to use a greater wattage rate or the indicated watt rating. It does not need to be accurate, but it should not be set high as it may cause the test to be disrupted. Setting it too low will lead to far less precise results.

Leave a Comment