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So... why is it so cool? Uncle Kevin likes it because it has a whole slew of cool features: truly balanced circuitry, zero negative feedback, full function remote control, cinema bypass, and it uses 12AU7 tubes. We've got a ton of the coolest NOS 12AU7s available at prices that won't break the bank. In fact this unit will ship with cryogenically treated, vintage, Mullard CV4003/12AU7's included in an already smokin' price!!!
The front panel display is a vacuum florescent display (VFD) with a blue lens. The display shows critical control functions from a Motorola CPU incorporated inside the preamplifier. The display brightness levels are adjustable with the remote control. The CPU stores all user-selected information for the volume level of each input and the balance setting for each channel. This processor is the controller "brain" for all active functions.
Take a look at the back and you see plenty of inputs and outputs. One fully balanced XLR input and output, along with 4 stereo pair RCA inputs, one pair of Cinema Bypass inputs, and a tape monitor loop. Then you get 2 pair of RCA outputs and 1 pair balanced XLR outs.

The analog audio section includes a total of eight (8) fully regulated power supplies with separate supplies for each channel’s vacuum tube analog circuitry, plus the multiple power supplies for the front panel alphanumeric display and supplies for the Motorola microprocessor.
The SLP 03 has a very low output impedance, which makes it easy to integrate in with virtually any amp, solid state or vacuum tube. The family insisting on home theater? Enter Cinema Bypass. The SLP 03 uses a unity gain circuit. In this case, unity gain is achieved when the volume control is set to 47.
This preamp is a true dual-mono design. Notice the two big power transformers. Each channel has its own transformer and power supplies, giving the SLP-03 incredible channel separation. There are 4 active gain stages inside which achieves the truly balanced circuitry. All this running in class A with zero feedback.
If you're a couch potato like me, you'll love that all of the cool features on this preamp can be controlled via remote; a first for Cary tubed preamps. Control volume, source selection, even balance control. The selected pair of dual triode 12AU7’s vacuum tubes per channel offers true balanced vacuum tube warmth and realism. Want to nudge the sound one way or another? We got ya covered with the coolest selection of NOS 12AU7s around, most of which will run you a mere $40 each for Platinum Grade.
Your choice of silver or black faceplate. In stock now with no waiting!
Specifications:
| Preamplifier Inputs | 1 pair balanced (XLR) 6 pair single-ended (RCA) |
| Preamplifier Outputs | 1 pair balanced XLR 2 Pair RCA |
| Controller Connectors | 1 - 3.5mm mini-plug jack for IR input 3 - 3.5mm mini-plug jack for trigger out RS 232 remote configuration interface |
| Vacuum Tube Compliment | 4 - 12AU7 |
| Volume Control Range | 63.0 dB |
| Gain | 16 dB |
| Input Impedance | 100k Ohms on RCA 200k Ohms on XLR |
| Output Impedance | 500 Ohms on RCA & XLR |
| Rated Output | RCA - 1 Volt (8 volts max) XLR - 2 Volts (16 volts max) |
| THD+N | < 0.03% |
| Frequency Response | +/- 0.1 dB from 5 Hz to 50 kHz |
| Residual Noise | < 90 dB |
| Power Input | Configured at factory for either 100 to 120 or 200 to 240 VAC, 50-60 Hz |
| Power Consumption | 75 watts |
| Weight | 25 lbs. |
| Dimensions | 4.5" H x 17" W x 13" D |
Posted by skumber
I've had this pre for 3 years. I got it used from Audiogon, in black. My previous preamps were passive (Bent Audio Tap-X) I love passives for transparency but the bass is just not there. I kinda chose this on a whim; Positive Feedback loved it. So did Sam T in Stereophile, but he notices a bit of electronic haze. So did I, but that being said I immediately fell in love with this pre's "lit from within' sound and waaaayyyy better midbass than the passives. So I called Kevin at Upscale and had him send out 4 matched Radiotechnique? 12AU7's to replace the JAN stock tubes. OK. Much Much better. Now there is some bass. Much sweeter at the top. Quieter, no haze. Fleshed out the music with much less distortion.
On to more improvements - regulated power (PS Audio re generator). Huge upgrade. Alto-Extremo Lyd II feet, positioned precisely underneath the dual-mono transformers in the front of the chassis, one in the rear. Tube dampeners from EAT. (2) HiFi tuning fuses swapping out the cheap glass ones. And finally, a Van Den Hul powercord with Furutech CU EIC terninations.
All said I spent about 800 USD on the tweaks. The PS audio re-generator feeds other components also so that doesn't count or does it? Anyway, the sum total of the tweaks really elevates this unit to WAY BETTER than a stock unit. Sometimes I'm really blown away by it.
But being an itchy audiophile, I'm always looking for better. But how much better can it get? Not sure. But then I'll pop in an 80's or 90's CD that had always been unlistenable with lesser equipment and I'll marvel at how rich and nuanced it sounds. Badly recorded CDs are not all that bad. Well recorded ones will thrill you.
My only beef is the sheet metal chassis - prone to vibrations and resonance. The Alto-Extremo feet took care of one aspect and I'm gonna try hockey pucks stacked on the top of the chassis for the other aspect. So it is fixable.
My other equipment:
Well-Tempered Amadaus TT, Heed Audio Quasar Phono
Primare DVD30, CARY CAD 200, ACI Sapphire XL monitors.