Amp Speakers: All You Need to Know
Believe it or not, speakers have a huge impact on the overall sound of your amp and tone. They are the part of your chain that is responsible for transforming electrical signal into actual sound waves. Speakers do a lot of heavy lifting! Here’s some information on how to get the most out of your amp and your speakers.
General Considerations:
If you aren’t quite happy with the sound of your amp, make sure that it is placed appropriately in the room. Most speakers sound best when they are closer to ear level – you can raise them off the floor or tilt your cabinet to get this effect.
In general, speakers should be the last piece of the signal chain that gets an upgrade. If your guitar isn’t great, for example, buying a set of expensive speakers won’t magically fix the tone. Ensure that you love the rest of the gear (guitar, pedals, amp, pickups, etc.) before swapping speakers.
Speaker size has a big impact on overall sound. Twelve inch and ten inch models tend to sound the best for guitar by maximizing richness and fullness, while fifteen inch ones are great for bass. Larger speakers produce and support better bass frequencies.
Before swapping speakers, check that the ones that you have are set up appropriately. If they are producing a hum or not sounding quite right, there may be an issue with the amp. The speakers could also be damaged or plugged in incorrectly.
If speakers sound thin and brittle, they may be out of phase (when using multiple amps or sound sources at once) or out of polarity (plugged in backwards). Check this first!
New (or different) speakers may or may not make a huge improvement on your tone. Proceed with caution. Testing speakers in person and conducting unbiased A/B tests is the only way to know if the upgrade is worth it for you and your set up. Do not trust YouTube or other recordings online. With those recordings, the player in the video often has completely different gear, and the method of recording, like mic placement, can totally change the sound that is produced.
Notable Brands:
As far as great speaker brands, you can’t go wrong with Celestion, Jensen, Eminence, and CTS. In particular, Celestion carries many speaker models that are the gold standard for reliability and great tone. The Celestion Vintage 30s, for example, have been used so ubiquitously over the last several decades that players are trying to branch out and find more unique sounds!
Companies like Mojotone and Weber produce speakers that are made with vintage specs and also sound incredible. These are great options for reliable speakers that don’t carry extra name brand cost. Weber also offers services for breaking in new speakers as well as plenty of customization options.
Like any other piece of music gear, there’s a big vintage market with speakers. Many players swear that vintage sounds better and responds to accents with more finesse, but that’s up to the individual to decide. Depending on the year and the model, the high cost of vintage may not be worth the actual audial return when installed in the amp. The most important value of vintage (or used) speakers is that they are almost always broken in, meaning that the stiffness of the cone has worn off. Speakers that have been used sound warmer and are more responsive.
Impedance:
All speakers have an impedance rating, or how much resistance they present to the amp. Combo amps will have matching speakers installed, but the issue of impedance often arises when swapping amp heads and cabinets. Impedance is an important consideration when dealing with tubes as a severe mismatch can damage the amp. In general, amps should be matched to their speakers with the same impedance rating. This means that a four ohm amp output should be connected to a four ohm speaker, for example.
Mismatches can be safely accomplished with interesting sonic results, but it’s good practice to never exceed double the impedance rating in either direction. For example, a four ohm amp may do just fine pushing an eight ohm speaker, but connecting it to a sixteen ohm speaker may cause damage.
If you aren’t sure about the rating of your speaker, you can easily measure its impedance by using a digital multimeter on its resistance setting. Place one probe on the positive terminal of the speaker, and the other probe on the negative terminal. It is common for the resistance to read slightly lower than the speaker’s rating. For example, a six ohm read would indicate that the speaker is rated with an eight ohm impedance. A reading of zero ohms or infinite ohms indicates a non-functional speaker.
Speakers and amps that are severely mismatched can still be used together with some simple rewiring! This is most easily accomplished with more than one speaker at a time, but you can also match impedance with only one speaker and some resistors. Check out this article to learn about wiring multiple speakers in series and parallel to match impedance, and read this article to learn how to solder resistors on a single mismatched speaker to match impedance.
Conclusion:
I hope that these tips help you get the most from your speakers! Let us know if you have any questions. Songbirds also has dealer access to Celestion and other speaker brands, so get in touch if there’s a special upgrade that you’re considering!