Ampsandsound

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American made with lifetime warranties. We were super impressed with the quality of these products. Their amps and headphone amps are superb.
Justin Weber makes products like they used to and prices them so that todays audiophiles looking for superb performance can actually afford them.


Mogwei Special Edition

Headphone and power amplifier
$3200.00

 
 
 
 

The Mogwai SE offers more than an entry point for tube amps, but a hybrid product, meant for both headphone and loudspeaker use. It ises Auricap coupling caps and is transformer input coupled for better sonics. It has adjustable output impedance of 8, 32 or 300 ohms depening on what you are running. Run your high quality headphones of hi efficiency speakers off the Mogwai and you will light up wiht a smile.

The Mogwei circuit offers the ability to roll a wide variety of tubes inexpensively and bring increased power to headphones without any sacrifice of design choices that conflict with our values.

The Mogwai combines the features of a full-sized two-channel power amplifier and headphone amplifier in a chassis that is suitable for a desktop use.

The Mogwai utilizes single-ended Class A operation with zero feedback to provide the essence of the Classic Wonder sound; strictly old school SET sound, without having to spend hundreds if not thousands of dollars on tubes.

The performance of the Mogwai is made possible with custom wound ultra-high quality output transformers from Transcendar, which provide excellent frequency extension and a flat response.

The Mogwai does not use a voltage divider network, but depends on transformers instead. They chose a 32 ohm tap for headphones to offer a dedicated selection for the widest range of headphones, and an 8-ohm loudspeaker tap to connect the Mogwai to moderately efficient loudspeakers.

Volume control is handled by the ALPS volume pot to allow attenuation and simplify the signal path. Zero feedback on the outputs negates the need for a pre-amplifier; an iPhone can drive the Mogwai without issue.
 

Tube Selection:
Input tube: 6SL7 or equivalent
Output tubes: 6L6GC, EL34s, KT66, KT77, KT88, 6550s and KT90s
A personal favorite is the Tungsol 6L6GC STR. Warm, strong and tight bass.

Cathode Bias/automatic bias allows for easy tube changes without adjustment.
Compatible with 32ohm-300ohm headphones using the “32ohm” 1/4″ jack.

Recommended Headphones:
Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-32ohm, HIFIMAN HE400i, HIFIMAN HE-400S, HIFIMAN HE-400

The Mogwai is handmade with pride in Southern California with US-sourced parts, including their  precision transformers.

Specifications:

Input impedance is 10K ohm with alps pot
Input Sensitivity 2.6V for full power out with input transformers

Power as measured with El34 power tubes and 5U4 rectifier
8 ohm power: 2.8Watts RMS @ 1khz
Noise on 32ohm tapp @ 440uV RMS

32 ohm power: 3.6Watts RMS @ 1khz
Noise on 32ohm tapp @ 650uV RMS

300 ohm power: 4.2atts RMS @ 1khz
Noise on 300ohm tapp @ 1mV RMS

Power as measured with KT88 power tubes and 5AR4 rectifier
8 ohm power: 8.2Watts RMS @ 1khz
Noise on 8ohm tapp @ 440uV RMS

32 ohm power: 4.6Watts RMS @ 1khz
Noise on 32ohm tapp @ 720uV RMS

300 ohm power: 5.2Watts RMS @ 1khz
Noise on 300ohm tapp @ 1.3mV RMS


Lifetime warranty to the original purchaser with 3 year transferability

More photos and info is at: https://www.ampsandsound.com/products/mogwai-special-edition


Kenzie tube headphone amp
$1900.00

The Kenzie headphone amplifier evolved from earlier designs – in this case, rave reviews about the SE-84’s headphone section. The inevitable question followed; why didn’t we build a dedicated headphone amp?

Why indeed?  After some research, we came to the conclusion that a headphone amplifier building on the much loved Darling circuit was the right choice for us. The outstanding performance of the Kenzie headphone amplifier is made possible with custom wound ultra-high quality output transformers providing amazing frequency extension.

The Kenzie does not use a voltage network, and has more than enough power to drive even the most difficult headphones. We chose 32 ohms and 600-ohm output taps to allow use with the widest variety of headphones; everything from Grado Labs, HiFiMan, Audeze, MrSpeakers, Sennheiser, and Beyerdynamic.

The Kenzie showcases the transformers on the chassis to frame in the unique 1626 single-ended tubes. We have included an ALPS volume pot to allow attenuation and simplify the signal path.

The Kenzie is one of the sweetest-sounding headphone amplifiers on the market. The 1626 is commonly referred to as the “Poor Man’s 300B”; offering a similar level of warmth, texture, and soundstage depth.

The 1626 is a WWII-era tube that was used as a transmitter tube in radar installations. The design is shy on pure output, but offers layers of texture and drive, and is paired with a massive choke and robust output transformers for ultra-quiet operation. As with all of their products, parts selection was crucial during this build and each chosen not for price, but for best quality and synergy.

Supplied Tubes:
Input tube: 12SL7 or equivalent
Output tubes: 1626 or VT-137

Cathode Bias/automatic bias allows for easy tube changes without adjustment.
Compatible with 32 ohm-300 ohm headphones using the 32 ohm 1/4″ jack.
Headphones above 300 ohms will benefit from using the 600 ohm 1/4″ jack.

Headphones driven successfully or tested with the amp include, MrSpeakers Ethers, MrSpeakers Ether Cs, Audeze LCD-2.2F, Audeze LCD-XC, AKG240, AKG701, Sony MDRV6, Sennheiser HD650, Sennheiser HD800, Beyerdynamic T1-600 ohm, HIFIMAN HE400i, HIFIMAN HE-400, HE-400S, Grado Labs SR-60, RS1i

The Kenzie is handmade in Southern California with U.S.-sourced parts and custom hand-wound output transformers.

 

Specifications:

Input impedance is 10K ohm with alps pot
Input Sensitivity 520mV for full power out.

32ohm power: 250mWatts RMS @ 1khz
Frequency bandwidth 20hz -3db to 12khz -3db full power
Noise on 32ohm tap @ 500uV RMS

300ohm power: 300mWatts RMS @ 1khz
Frequency bandwidth 20hz -1db to 18khz -3db full power
Noise on 300ohm tap @ 1.4mV RMS


Casablanca
60wpc mono amplifiers

$4600.00 per pair

Casablanca

The Casablanca’s are aptly named for their classic good looks and commanding performance. They came about in response to repeated requests by customers for a single-ended amplifier with the power to drive non-compliant or inefficient speakers. Typically high power single-ended amplifiers are either run in pentode or using exotic power tubes; we opted for a push-pull based amplifier; the larger version of the Stereo 15.
The Casablanca’s provide 60 watts with KT88/6550 power tubes and 45 watts with EL-34s. Based on the Eico circuit and using a 12AX7/6SN7 front end allows access to a vast array of NOS/NIB tubes. The Casablanca’s come with 8 ohm and 4 ohm taps and can be ordered with 16 ohm taps if desired. To provide reliable power and a sweet sound, the Ampsandsound design partners carefully evaluated two new takes based on similar designs; the Eico HF97 and the Dynaco MKIII. They built both and did a shootout with the reigning king of push-pull amps, the McIntosh MC275.

The results were startling. The Eico based circuit was a definite improvement over their take on the MKIII and was on par with the MC275.
The Casablanca’s provided extremely articulate bass, with remarkable mid and high-frequency extension. The bottom line – this amplifier offers the warmth and detail we all expect from a reference level push-pull amplifier and nearly limitless personalization with different tube combinations. The tubes included with purchase are new Tungsol 12AX7, Tungsol 6SN7, and Tungsol 6550s.

What differentiates ampsandsound Casablanca’s from any of the other well-made gear in it's price range? The answer is that there may be few differences, but the differences that do exist are pivotal to their approach to the reproduction of music. First off, many tube amplifiers in the Casablanca’s price range have lower power. Other similar-price amplifiers are stereo amps, not providing the performance and channel separation for which mono-blocks are known.
The Casablanca design was chosen to allow for a massive power supply. Also, mono-blocks require 40% more parts, and like all ampsandsound components, the Casablanca’s utilize modern materials to bring a higher level of performance. Including using 1-2% resistors instead of the less costly and more common 10% variety, and coupling capacitors with 5% tolerance instead of 20%. Point-to-point wiring would allow for streamlined building, but our PCB’s provide superior grounding and noise isolation, with the result that we have realized and improved upon the sonic characteristics of the great amplifiers of the 50’s and 60’s.

Input impedance is 475Kohm, 1.6v for full power.
With the inputs shorted, the output noise is 680 microvolts RMS.
Maximum Power @ 1kHz = 60 Watts RMS.
One watt Bandwidth is 10 Hz to 35 kHz.
Bandwidth at full power 60 watts is 26hz to 18khz.

Stereo 15 Special Edition
15wpc stereo EL84 based amplifier

$2800.00

Stereo 15 Special Edition


 

The Stereo 15 Special Edition is an EL84 ultra linear amp with 15 watts of tube bliss. 2 EL84 tubes in push-pull configuration with ½ of a 12AX7 and ½ of a 12BH7 per channel, just like their original Stereo 15. The Stereo 15 Special Edition is based on the famous Halfer circuit with cathode bias allowing trouble free operation. 8 ohm and 4 ohm taps with 8 ohm and 16 ohm combination as an option. The circuit used is widely famed for its stability and liquid midrange.

The Stereo 15 Special Edition produces perfectly stable 15 watts RMS with 42 watt peaks. The output transformers utilize massive cores which resist saturation and deliver jaw dropping low end performance. Like all ampsandsound amplifiers, it is dead quiet with reliable performance. When we say dead… we mean put your ear to the mouth of your horn-loaded system and all you will hear is silence!

Never leaving well enough alone, the Special Edition is for those who demand the very last degree of performance. Where the Stereo 15 Special Edition differs is in the use of custom wound transformers made exclusively for ampsandsound. The power transformer is nearly twice as heavy as the unit used in the Stereo 15 and allows for greater current delivery/reserves and the use of a tube rectifier. They have specified the use of a GZ34, and can accommodate GZ37s; 5U4s allows NOS rectifiers. Tube set included.

Bench results:
Input impedance is 500Kohm, 1.6v for full power.
With inputs shorted output noise is 5mV P-P
Maximum Power @ 1kHz = 22 Watts RMS
246mV P-P = 1 W RMS 10 Hz (-0db) – 27.4 kHz (-1db)
550mV P-P = 5 W RMS 18 Hz (-1db) – 22 kHz (-1db)
796mV P-P = 10 W RMS 26 Hz (-0db) – 15.5 kHz (-1db) (Before Distortion)