Serenade phono amplifier
Phono stages are very special to me. I have a large record collection and never made the switch to digital. I had a field day when everyone was selling their record to Goodwill. $1 each. I fear these good old days are over as others are discovering the magic of vinyl. I have been building phono amps for many years and have tried many and built many others. My favorite is to use tubes for the amplification. The main downfall of this approach is that tubes can be noisy. Phono amps multiply the signal many times over. Much more than other types of amps. Noise is multiplied as well. So what is the solution? I have found that there are a few ways of making an all tube phono stage quiet. When using a cartridge of less than .4mV of output you need to use a head amp or tube noise may become too loud.
I started with a commercially available board. I used a combination of Mundorf Evo, and Wima capacitors, 1% film resistors. All traces on the board are made of Silver for detail and power. All tube sockets are Gold plated for trouble free service. All parts are hand selected to insure a large soundstage. Transformer is a custom made shielded Torrid, which can run on 120/230/240 volts. It has that you are there quality.
I have been making this amplifier circuit for over ten years. I have a 100% customer satisfaction rating for over 12 years on both Audiogon and Ebay. I am a top customer with Paypal as well. As you can see I have changed to a new board and custom, hand made power supply which maximizes the design. It is more quiet and with more bass than ever. The Serenade Amplifer is equal to amps that cost much, much more. Please read the reviews.
HOW CAN THIS AMP BE ANY GOOD AT THIS LOW PRICE?
I have used parts from suppliers all over the world. Included are parts from Japan, Germany, China, and USA to keep cost down. I have used a standard chassis instead of paying hundreds for a custom job with printing. This allows me to buy superior parts and still keep cost down. You will not find this unit anywhere else. It may be the best deal in the audio business.
Here are the latest customer reviews:
Here is another one.
Hi Tom
I changed the setting back to M C @ 100 ohms after trying a higher setting,I
took the sot out of the configuration, I warmed the amp up with one side of Bach
and then I played my reference album, Dark side of the moon.
HOLY MOTHER OF GOD this would equal the most discerning systems at any cost,
the separation and darkness of the sound stage just blew my mind I am not
changing the cartridge, it could use a little more mv output to be perfect but
it is not worth the effort as this turntable is a bear to change. Thank you for
leading me away from the H O M C, I did buy the denon 103 r and I am going to
install that on a Thorens 160 that is being refurbished and up graded with
todays technology or possibly a VPI classic if I can get the right price on that
and sneak it into the house so my wife doesn't see it.
At any rate I could not be happier with this very fine pre amp you would be hard
pressed to find one that functions as flawless at any price. It is a great
product and you are a absolute pleasure to deal with.
I will send you the tracking # when I go to the post office, but now It is
Beatles time
Thanks
Here is another review just received:
Hi Tom,
Yes I received the pre amp in good condition and I sent you a response on Ebay
for your product.
I set it up and it sounds great! I've invested in an affordable LP vinyl washing
system, and with a modified vac system, my record collection has been given new
life!
The Marantz SR8001 amp and Technics SP15 turntable/Grado cartridge are sounding
really clean with your phono stage.
Thank you for your excellent workmanship.
Best,
Phil
Tom,
Received the amp and plugged it in to the CD input of my Yamaha A-S700 amp. I
have a Yaquin MC-100B that’s been modified by a tech in Australia and a pair of
Sonus Faber Concertinos, but all unfortunately still in storage.
I am listening to some Australian country music, the hairs on the back of my
neck are standing up - I’ve honestly never heard it sound so clear, present and
detailed.
Can’t wait to spend some quality time with your preamp. Maybe I’ll just plug the
headphones in and kick back for a couple hours….
Thanking you, sir.
Shawn.
MC | MM | ||||
---|---|---|---|---|---|
Vacuum Tube Complement | 4 x 12Ax7 | 4 x 12AX7 | |||
Inputs | 1 pair single-ended RCA | 1 pair single-ended RCA | |||
Outputs | 1 pair single-ended RCA | ||||
Gain (Total 60dB) | 60 dB | 50dB | |||
Output Impedance | 425Ω | ||||
Frequency Response +0 -1 dB | 10Hz – 50kHz | ||||
Maximum Output Voltage <1% THD | 20V | ||||
Cartridge load impedance | Variable: 200Ω, 510Ω, 1.2k 1.8k | 47kΩ, Please see Note in instructions | |||
Minimum Recommended Cartridge Output | 0.4 mV | 1.5 mV | |||
Signal to Noise Ratio | 50 dB | 56 dB | |||
Channel Separation | > 50dB (20 Hz – 20 kHz) | ||||
Power Consumption | 20W | ||||
Dimensions W x D x H | 17 X 12 X 5 | ||||
Weight | 14 lbs packed |
First, Tom at ATA was great to work with. He answered all my questions and helped me make decisions on a completely custom, hand-built, phono stage. As you can see in the first pic, the signal path consists of Mundorf S/O as the output coupling, along with Sonicaps and silver mica caps in the passive RIAA section, with Mills resistors. Electrolytics are used only for the radio frequency filtering, which is outside the signal path. Everything except the Mundorfs are part of the standard 100 dollar upgrade (normal price for the stage is 899, 999 for the upgraded version). Those ran an extra 200 on top of the upgrade. I also decided to go with a choke input on the 274B rectified power supply, and a linear power supply instead of a switching after talking to Tom about the pros and cons of each. I'm also now running his recommended Amperex 12AX7s, which I really like. Into this, I'm running an Empire 2x8 fitted with a Rega arm that's been heavily upgraded and a Shelter 501 Mk II cart using a Baerwald (sp?) alignment for Rega arms. The phono IC comes from the Cardas DIN to custom solid silver cables w/ WBTs, and out from the pre via a custom cable that's a single silver and a single copper 28 ga. OCC strand twisted together w/ DH Labs RCAs and cotton insulators. That feeds out into my Pio SC-05 and out via analog direct into my Mackie's then to my RTi12s @ 850 wpc. So that's the setup.
The sound is very balanced, with many good qualities, and no bad ones that I can hear. The sound stage is quite wide and deep, and instruments have a very nice space, but they sound neither big nor pinpoint. Instead, instruments sound life-sized. Vocals have a good weight to them, and it's very easy to count the number of singers when multiple vocalists come in. A good example of this is the 2nd track on Jackson Brown's Running On Empty, where there's a close harmony between 3 male vocalists. On my old Parasound, I thought it was a weird mix where Jackson's voice was spread all the way across the sound stage. After hooking up the Aural Thrills Audio stage, I was able to discern that it was actually 3 different vocalists in close harmony, with Jackson mixed center, and one voice mixed into the left channel, and one into the right. Female vocals also receive very good treatment. Ella and Aretha are even more engaging than ever. It's especially fun picking out which vocalists have good mic technique, and which one's tend to lean into and away from the mic while singing. Cymbals ring for a ridiculously long time through even the densest tracks, and have plenty of that brassy shine to them that you hear if you strike a cymbal yourself. It's even easy to discern where on the cymbal it's being played, down to how far from the bell the drummer is striking it, and exactly which type it is (ride, china, etc.). Drums have amazing slam, with a deep, tight bass. I find myself listening to Rolling Stone Under Cover just to listen to the drums. Also easy to hear is the ring of the drum head after being hit, as well as the transient from the strike. Bass guitars and bass violas, whether plucked or bowed, sound fantastic. Deep, lots of overtones, just like they're in the room. Acoustic guitars (and all wood-bodied instruments) again sound very realistic. Picking out a small bodied acoustic, or a dreadnought, etc., all are quite readily distinguishable. Violins and other stringed classical instruments have a very slight sweetness to them, but again, the wood of the body is clearly distinguishable especially during solo passages, but also during denser passages. Horns all have their own proper sound, and the breath of the player can easily be heard when wind or reed instruments are present. It's especially fun to listen to pieces with both flutes and piccolos present, since the tonal differences are so readily apparent. Finally, piano pieces sound excellent, right down to the hammer striking the strings. So in short, this pre wasn't cheap, but it's an excellent value. I can't wait to see how it sound after another 200 hours.