So, what’s the ideal amp? Let’s find out!

The Ideal Guitar Amp

The following composite descriptions of the Unlimited Budget and Limited Budget Ideal amps are based on the most selected features (in some cases I used the mid-point of a range of selections if they were equal in popularity).

Unlimited Budget

• Head configuration
• 50 watts
• 6L6 power tubes
• Tube rectifier
• Treble-middle-bass tone controls
• Tonality: great cleans and ‘shred’ preamp distortion
• Two preamp channels
• $2,500

Limited Budget

• Combo configuration, 1×12
• 18 watts
• 6V6 power tubes
• Tube rectifier
• Treble-middle-bass tone controls
• Tonality: great cleans and ‘shred’ preamp distortion
• One or two preamp channels
• $750

Following are the compiled results from each question.

Musical styles:

On average each respondent selected 2 music styles.

• 80% play rock music.
• 40% play blues. (DOH! I can’t believe I left this category out. Thanks to all you blues players for using the ‘Other’ category to write in your preference.)
• 25% play country.
• The rest are spread out over jazz, metal, fusion, surf, garage, noise, grunge, ska, gospel, swing, “folk noise Americana” and “post-rock biiiing biiiing sounds” (whoever plays that PLEASE send me a sound clip!).

Price

As you can see, it is quite clear that $2,500 seems to be the sweet spot of the ‘Unlimited Budget’ (UB) price point. It’s interesting that there are about as many people willing to pay no more than $1,500 as there are those willing to pay $5,000 for their dream amp!

The ‘Limited Budget’ (LB) sweet spot is wider spanning $500 to $1,000.

Use

When asked “What are you going to do with your ideal amp” the answers were evenly spread across playing at home, jamming, rehearsal, gigging and studio recording. There was slightly more interest in using the UB amp for gigs and in the studio, while the LB amp would get slightly more use at home.

Head or Combo?

The UB amp is slightly more likely to be a head (55%) than a combo (45%). The LB amp is most likely to be a combo as selected by 65% of respondents vs. a head selected by 35%.

Output Power

UB amps will have a fairly wide range of power spanning 30 to 100 watts.

LB amps will be lower powered with 15 to 20 watts being the clear preference. There’s a reason why there are so many amps available in this power range!

Almost all of the respondents who selected the ‘Other’ choice identified a desire for the ability to adjust the power of their UB or LB amps whether that be a continuous adjustment or switching power levels.

Power Tube Preference

Clearly 6V6s and 6L6s are the preferred tube for the ideal amp. As can be seen, V6s are the preferred choice for LB amps while L6s are the UB choice. This makes sense when desired output power is considered: 6L6s produce more power than 6V6s, which matches with the UB vs. LB desired power output.

Power Supply Rectifier
70% of UB amp designers selected tube rectifiers for their ideal amp compared to 50% for LB amps. Of the non-tube rectifier responses most said they didn’t care whether the rectifier was tube or solid state.

Flexibility: Range of Tones

These results surprised me, which makes me think that I didn’t do a good job of selecting the categories. However, the data shows that, regardless of budget, EVERYONE wants an amp that does great cleans and produces shred levels of preamp distortion. That’s surprising because virtually no one said they played shred-type music!!!

Preamp Channels

Predictably, LB amps were designed to be more simple with fewer channels than UB amps. However, there was a strong desire for even the LB amps to have built-in flexibility from 2 channels.

Single Channel Design

These results underscore my belief that the questions regarding tonal flexibility were not well conceived. The above chart shows that in a circumstance where an amp has only one channel, guitarists DO NOT want preamp distortion. That contradicts the Flexibility results shown above where it appears that most guitarists want shred preamp distortion in their amps!

The single channel preamp design question was much more clear than the flexibility question, which leads me to believe that its results are more reliable than the flexibility results.

Tone Controls
No surprises here. Regardless of budget, guitar players prefer treble-middle-bass (TMB) tone controls. They would be found on over 70% of UB amps and 60% of LB amps – 20% of LB amp owners would be OK with treble and bass controls. A presence control was a popular addition for those who selected ‘Other’.

Effects

There was widespread response regarding the inclusion of effects. However, no one effect received support from even one half of respondents. The most popular effect is reverb, only one in three think it should be included in their ideal amp.

Thankfully, digital multi-effects were generally ignored by the ideal amp respondents. As can be seen, reverb and tremolo/vibrato were relatively popular, but none of the options provided were wildly popular. That would indicate that guitarists questing after their ideal amp are mostly focussed on tone and not effects.

Combo Configuration
60% of UB amps would feature two speakers and 70% of respondents wanted 12″ speakers in their UB amp. LB combos were more or less evenly split between one and two speakers (49% and 46% respectively), but a strong preference was still shown for 12″ speakers with 65% of respondents selecting them.

The Last Word
When asked what else they would add to their ideal amps, LOTS of ideas were thrown out including:

• Stand by switch
• Wheels
• Various colors
• Ceramic tube sockets
• Hand wired circuit board
• Specific tube rectifier models
• Switchable negative feedback
• EF86 preamp
• Speaker impedance selector
• Dual power amp – high power for cleans, low power for distortion
• Fire-spitting jets that flame up during a solo!

Send me an email with your comments about the results of the Ideal Amp survey: Don@MackAmps.com.

The Ideal Guitar Amp: Survey Results from MyRareGuitars.com

Class A tube guitar amps. Everyone’s heard the term. It’s generally associated with higher-end amps in support of an amp maker’s claim that their product sounds “better”.

I’ll leave the debate as to which is better to others. What I want to discuss is what Class A really means and, from the pet peeve perspective, to debunk many amp manufacturers’ claims that their products are Class A when clearly they’re not! You may be surprised at how many amp makers falsely claim Class A operation. So, let’s review, in practical terms, what Class A really is and learn a simple rule of thumb you can use to spot operating class BS!

There’s no denying that Class A amps have different tonal characteristics when compared to the more common ClassAB amps. However, as with anything related to tone, “better” is in the ear of the beholder. There are plenty of butt kickin’ amps out there of both classes.

What does “Class A operation” mean? Technically, it refers to where on a tube’s operating curve, it’s biased. That’s it. Bias a tube one way and it’s operating in Class A, change the bias and it’s in ClassAB.

Of course, there are always technical details that complicate things. In this case, the complicating detail is that tubes biased to operate in the Class A “zone” require a lower voltage supply. Otherwise, they’ll quickly fail. Enough tech stuff, no need to worry about that. I mentioned it to avoid a misperception that you can simply take your amp to a tech for a 5-minute re-bias job and you’re in Class A land. Can’t happen. Fundamental changes to your Class A/B amp would be required to lower the voltage and otherwise set it up for Class A operation. Back to regular programming!

Fixed vs. cathode biasing is another “Class A” related misconception. Many believe that if an amp is cathode biased it is Class A. Not true. An amp can be A or A/B and fixed or cathode biased. Again, it depends on where the tube is biased on its operating curve not how it is biased.

Another factor in the myth is that if an amp has a “single-ended” power tube configuration it is Class A. Conversely, so the myth goes, if an amp has a push-pull power tube configuration it is Class A/B. Once again, the operating class of the amp is not defined by the power amp configuration. It is true that many (most?) single-ended amps are, in fact, Class A. But, on its own “single-ended” does not define an amp’s operating class. An amp can be Class A push-pull or Class A/B single-ended or vice versa.

The technical difference between single-ended and push-pull power amps are perhaps a topic for another article; I mention it here because they are common terms and often enter into the Class A vs. Class A/B confusion.

I mentioned above that Class A amps sound different from Class A/B amps. To review, Class A means the tubes are operating in a different part of their operating zone as compared to Class A/B. Two important things happen as a result. First, tubes operating in Class A produce more even harmonic content. Second, they produce less power.

Tubes biased to operate in Class A/B produce more odd order harmonics. Generally, even order harmonics sound more pleasing than odd. That’s why Class A and Class A/B sound different. However, as I mentioned earlier there are MANY GREAT sounding Class A/B amps. Don’t get unnecessarily biased toward Class A amps (amp builder’s humor – HAHA!).

The fact that a Class A amp with the same power tube configuration as a Class A/B amp produces less power leads us to the simple rule of thumb you can use to check whether an amp is really Class A: just compare the power tube configuration to the claimed output power rating of the amp.

Here are the guidelines I use to tell if an amp’s manufacturer doesn’t have their facts straight:

*Some smaller Class A/B Fenders (e.g. early Princetons and Deluxes, etc.) that feature two 6V6s are rated around 15 watts – later examples are in the more typical 20+ watt range.

If the marketing hype shows output power near or above these ratings and it says the amp is Class A – there’s something wrong! If the output power is a fair chunk lower, the amp is most probably Class A. Simple!

Next time you read a guitar mag have fun by checking the tube configuration, power rating and operating class claims of your favorite amps. You may be surprised at what you find!

Class A Tube Amps: Marketing Hype vs. Reality from MyRareGuitars.com