On the hunt for great tone at low volume? Join our columnist’s safari.
I’m on the hunt for an attenuator, so I’ve been prowling music shops and hunting online to find just the right one that will preserve my tone, but reduce it to a volume that will keep the neighbors from calling the cops—or keep a club’s soundman off my back.
“What’s an attenuator?” That’s a question we get a lot at PG, and the answer is: a device that allows you to drive your tube amp hard without the volume that comes with turning up. As we all know, pushing tubes really makes an amp sing, and getting that tone at a reduced volume can be a feel-good experience for everybody.
An attenuator is connected between an amp and a speaker using two regular speaker cables—one from the amp to the attenuator and one from the attenuator to the speaker. Then you dial in your tone and volume, and you’re set.
“Pushing tubes really makes an amp sing, and getting that tone at a reduced volume can be a feel-good experience for everybody.”
There are four types of attenuators: passive, active, resistive, and reactive. Passive attenuators rely on weakening the power of the signal and improving the impedance match between the guitar and the amp. They don’t require any sort of external power supply, and they used to have a reputation for frying tubes and overheating amps, but modern tech has reportedly cured those concerns. Active attenuators do require external power. This is because they are designed not only to attenuate a signal but also to boost it. So, essentially, an active amp attenuator takes a portion of the amp’s signal and reduces it or increases it to give it more drive.
The main difference between resistive and reactive load attenuators is that a reactive attenuator lowers the amp’s output while maintaining its impedance curve. This means that, regardless of the amount of attenuation, your tone will maintain as much transparency as possible. Resistive attenuators don’t maintain that impedance curve, and as attenuation increases, the color of your tone changes, becoming more compressed and darker.
Now, let’s take a look at some of the attenuators I investigated, in different price ranges.
This is a passive attenuator, meant for use only through an effects loop. It does an effective job of attenuation, but it sounds thin compared to the active (and more costly) attenuators I listened to. It changes the tone more, too, but at a $65 street price it can easily get you in the game.
The Torpedo Captor X from Two Notes is a multi-function tool with lots of bells and whistles. It’s a compact and portable reactive load box, amp attenuator, miked-cab simulator, IR loader, and stereo expander. Although I didn’t get to experiment with all of its capabilities, this is a great sounding attenuator—very effective, and it maintains your tone while lowering the volume. But at $599 street, it’s an investment, as are all top-shelf attenuators.
The Prodigy is an excellent sounding box and does a good job attenuating the signal to your speaker. Like the Two Notes, it has more functions than attenuation, but you can choose 100 percent, 50 percent, or 25 percent attenuation. It includes a DI and nice high and low EQ controls—along with a built-in headphone amp. The Prodigy uses custom ceramic-coated resister coils to convert the excess power from your amp into heat. And like the Torpedo Captor X, it’s priced at $599 street.
This attenuator from amp-builder Dr. Z sounds great and does a good job of maintaining sound and tone while lowering the volume of your amp. It’s very simple to use, with a 5-position switch for different amounts of attenuation. This box accepts 4-, 8-, or 16-ohm loads. It has parallel speaker outputs, letting you run multiple cabinets. It’s only compatible with tube amps up to 45 watts, so it won’t work with your Marshall stack. But this device packs a lot of bang for $399 street.
This is the Cadillac of attenuators—a very high-quality device using premium analog components. In addition to a top-notch attenuation circuit, the OX Box features Universal Audio’s Dynamic Speaker modeling technology, giving you access to dozens of spot-on mic and guitar cabinet emulations. But like a Cadillac, it ain’t cheap, at $1,499 street. PS: If you’re a Buddy Miller fan, the OX is an important component of his tone.
What I discovered in my hunt is that if you’re looking to maintain your tone at lower volumes, you are probably better off spending more on an active attenuator. Passive attenuators tend to change your tone while bringing your volume down. So, if it’s within your budget, it’s worth paying more for the good stuff.
The new dual-channel amp is designed to emulate a tweed Twin.
Cleveland, OH (November 29, 2018) -- Moving in a new direction for Dr. Z Amps, the NOVA is a twin-channel switching amp with a wonderfully rich clean channel, reminiscent of a low-powered tweed twin, featuring full bodied mid-range with great depth and harmonic content. Our secret behind maintaining signal integrity is the unique overdrive circuit that allows the player to blend smooth, thick overdrive into the existing clean signal for a perfect blend of string articulation and fat distortion. Instead of cascading gain from one stage to the next, the NOVA utilizes a parallel blend of overdriven and clean signals all accessible at the click of the included footswitch.
Though at its heart the NOVA has a vintage soul, the 32 watt, 5881 power tube-based amplifier also embraces modern practicality with the following features:
- A specifically tuned post-phase inverter master volume to supply raucous roar or pristine cleans at whisper volumes.
- A buffered series effects loop to maintain clarity in even the longest signal chain.
- Hand-wired turret board construction assembled in Cleveland, OH.
- A Triad Company paper wound transformer for a distinctively vintage tonality.
- Dual channel preamp with blend-able clean and overdrive channels.
- Power amp loaded with Tung Sol 5881 power tubes in triode wiring configuration.
- Choice between our ultra-light imported poplar 1x12 cabinet or our standard head cabinet.
- 1x12 Ultra-Lite Combo is loaded with a Celestion G12 H30 70th Anniversary speaker.
The NOVA 1x12 combo retails for $2199 and the NOVA head retails for $1899 from authorized Dr. Z dealers.
Watch the company's video demo:
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Dr. Z Amplification
Step inside Premier Guitar’s magical, miraculous time machine and revisit the gear that stood head and shoulders above the rest as Premier Gear Award winners in 2018.
Koll Super Cub
Saul Koll’s latest creation is an upscale tribute to down-market American guitars of the 1960s, but unlike its ’60s inspirations, the Super Cub is an exceedingly high-performance instrument. Equipped with custom Curtis Novak silver-foil pickups, the guitar offers surprisingly versatile tones ranging from authoritative cleans to brash chunk. Light and ridiculously fun to play, the Super Cub will appeal to guitarists who like svelte instruments and appreciate fine hand-workmanship.