2 Channel Amps

Our production amplifiers represent our most thoroughly tested designs. We have created push-pull and Single-ended tube designs at a variety of power levels to allow you to select the ideal amplifier for your system. Enough samples of each design have been manufactured to maximize their sonic potential.The Ampsandsound sonic signature closely approximates the best aspects of the classic tube sound of the 50s (maximum midrange bloom), supplementing it with a modern bass signature and transient speed. We have chosen a few of our favorite designs to bring to market. In general, we partner moderate efficiency speakers with tube amps of low to modest output to provide high-end sound at reasonable prices.

Our single ended choices are turn-key solutions for anyone wanting the joys of single ended amplifiers with the Kenzie Special Edition brining true DHT/SET sound to smaller rooms and high efficiency speakers. The Bigger Ben delivers single ended sound with enough power to fill a larger listening space, and it gives you the ability to roll and wide range of NOS signal and power tubes without breaking the bank.

Among our Push-pull amps, we offer the Stereo 15 Special Edition. (Side, note… its output is not 15watts, but 22watts.) It gives you the speed and punch many crave in push pull designs while allowing use of a tube rectifier for tube rolling/and selecting how much sag/ midrange warmth you want. Using the Casablanca mono blocks is a no compromise solution. The Casablancas offer the ability to run speakers of moderate efficiency, with frequency extension beyond the audio band. The Casablanca offer practical power levels with current reserves sufficient for dynamic range.

The Casablanca’s are aptly named for their classic good looks and commanding performance. They came about in response to repeated requests by our customers for an amp with more power able to drive non-compliant or inefficient speakers. We were asked for a single ended amp with more power. Given that large power SE amps are either run in pentode or using exotic power tubes we opted for a push-pull based amp; a larger version of the Stereo 15. The Casablanca’s provide 55watts with KT88/6550 power tubes, and 40watts with EL-34s. Based on the Eico HF97 circuit and using a 12AX7/6SN7 front end, allowing access to a vast array of NOS/NIB tubes. The Casablanca’s come with 8ohm and 4ohm taps and can be ordered with 16ohm taps if desired. To provide reliable power and a sweet sound we turned to our design partners and carefully evaluated 2 new takes based on similar designs; the Eico HF97 and the Dynaco MKIII and compared these new designs the to reigning king of push pull amps the McIntosh MC275. We built both the HF97 based design and the MKIII and did a shootout with startling results. The HF97 based circuit was a clear improvement over our take on the MKIII and was on par with the MC275. The Casablanca’s provided extremely articulate bass, true sounds mid and high frequency extension that compared well to solid state designs. This amp is versatile in its use of power tubes and provides the warmth and detail we all expect from reference level push pull amps.

The Kenzie Special Edition came from the Darling circuit for which we took one step further by sourcing the very best parts we could find. The circuit employed is widely known for its musicality, black backgrounds and relaxed nature. The Kenzie special edition makes generous use of both capacitor and choke filtering to yield astonishingly low DC ripple and low noise operation.

Kenzie Special Edition
Kenzie Special Edition
Kenzie Special Edition
Kenzie Special Edition Wiring
Stereo 15 Special Edition is EL84 ultra linear amp with 15watts of tube bliss. 2 EL84 tubes in push-pull configuration with ½ of a 12AX7 and ½ of a 12BH7 per channel.

Stereo 15 Special Edition
Stereo 15 Special Edition
Stereo 15 Special Edition
Stereo 15 Special Edition
Bigger Ben is a single ended, ultra linear stereo amp built like an Abrams tank, and optimized for KT88 output tubes. Bigger Ben takes the single ended design and turns the knob to 11. Output iron is massive and able to dig incredibly low. Power supply includes near excessive filtering with a massive choke. Bigger Ben can use many of the 6l6 family tubes and el34 family. 5k primary is used for ultra-low distortion over raw output. Compatible with 6l6GC, KT66, EL34s, KT77, KT88s opening the door for new old stock tubes or new production favorites.

Bigger Ben
Bigger Ben
Bigger Ben
Big Ben Wiring

Important Factors common to all ampsandsound amps:

Non-boutique approach
ampsandsound believes in the non-boutique approach to manufacturing. Resistors are 2% or better and over spec’d, Caps are made by industry leaders with 5% or better ratings, wiring is Teflon, and output transformers include large core to resist saturation and provide a minimum 20hz to 20khz on a bench. Ultra wide frequency response, rock steady RMS provides a non-fatiguing sound.
Minimal Deflection
All ampsandsound amplifiers are built on a thick plate of anodized aluminum which is 10”x14” and placed into a hard wood plinth/chassis made of solid ¾” thick Eastern Walnut. The plate is 1/8” thick and has nearly no deflection. We don’t outsource our work at ampsandsound. We have the depth of the chassis large enough to allow for full sized chokes to be used without cluttering the clean look up top.
Ample Power Supply
All ampsandsound amps employ an extremely stiff power supply. The power supply chosen exceeds specified capacitance and always includes robust choke filtering. We recognize the importance of reducing DC ripple in creating life-like sound stages.
High Quality Transformers
Output transformers are over spec’d and ultra high quality. We consider the output transformer as important as any other design choice. When buying any tube amp, the weight of output transformer can be directly proportional to the quality of sound. In general, larger outputs have larger cores which are less prone to saturation and have higher inductance. Larger cores and greater inductance allows the transformer to carry a low-end signal with minimal distortion. These transformers are bench tested to perform down to 20hz to up to 20khz. Even if your speakers only go to 50hz like a LS3/5a having an amp with can drive that low impedance signal is pivotal in creating the whole sound stage.
Wiring Detail
Internal wiring is done with silver plated Teflon and silver solder. All wiring is held down and tied neatly with obsessive detail. We prefer never to see a loose wire… always tied down with a service loop and always dressed with function dictating form.
Handmade Products
Our products are handmade. Parts selection matters deeply to us, sourcing the highest quality parts that can be found without getting distracted by esoteric or misleading specs. We have chosen parts with preference to domestic suppliers including our signature top plates, chassis, transformers, and PCBs.
Quality, not Quantity
We do not want to sell these in large quantity. We seek to build something worth passing down and demanding use. We believe each of our amps are statement pieces, each design choice was made with care. Our design esthetic was masculine and purposeful… nothing by accident.
Easily Upgradeable
We have specifically chosen to build based on the best practices of production. Switches, fuses, IEC sockets and binding posts are common and replaceable with off the shelf parts should a need ever arise. Tube Sockets are high temp ceramic, PCB is super thick with through hole construction, resistors, and capacitors are all over spec’d intended with long trouble free use.
Dramatically Smooth Sound
The sound is smooth, liquid without sacrificing detail. We recently demonstrated the final production version at a small listening party paired with our Cornscalas’ and everyone was awestruck with the size and depth of the sound-stage.
Semi-Custom Design
The Aluminum top-plates and hardwood chassis were made large enough to allow appropriate component layout with specific attention to grounding and signal wire location. We chose to use domestic hardwoods, Eastern walnut, Mahogany, and other exotics to provide the solid foundation to build excellent sound. Exotic hardwoods can be chosen at additional costs.
Special Attention to Grounding
Each amspandsound amp is built with attention to grounding schemes/ star grounding and use of common ground contributing to its ultra-low noise floor and wide bandwidth.
Tube Rolling
Tube Rolling is a great way of getting to know your amp as each tube has its own sonic signature. The reality is we are here to enjoy music… if rolling, try 1 type at a time… driver or power and allow several weeks to really hear the tube before changing it again. So often we chase a different sound, rather than a better sound. A great amp or speakers are meant to be transformative, so let the music play!